build system: major overhaul: removed sysinfo, integrated ccenv.

43 files changed, 1496 insertions, 704 deletions

diff --git a/Makefile.in b/Makefile.in
index 0606c5b..5b8006a 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -51,29 +51,29 @@ DVIDIR			= @dvidir@
 PDFDIR			= @pdfdir@
 PSDIR			= @psdir@
 
-CFLAGS_COMMON 		= @cflags_common@
-CFLAGS_DEBUG 		= @cflags_debug@
-CFLAGS_CMDLINE 		= @cflags_cmdline@
-CFLAGS_CONFIG 		= @cflags_config@
-CFLAGS_SYSROOT 		= @cflags_sysroot@
-CFLAGS_OS		= @cflags_os@
-CFLAGS_SITE		= @cflags_site@
-CFLAGS_PATH 		= @cflags_path@
-CFLAGS_STRICT 		= @cflags_strict@
-CFLAGS_UTIL 		= @cflags_util@
-CFLAGS_LAST 		= @cflags_last@
-CFLAGS_ONCE 		= @cflags_once@
-
-LDFLAGS_COMMON 		= @ldflags_common@
-LDFLAGS_DEBUG 		= @ldflags_debug@
-LDFLAGS_CMDLINE 	= @ldflags_cmdline@
-LDFLAGS_CONFIG 		= @ldflags_config@
-LDFLAGS_SYSROOT 	= @ldflags_sysroot@
-LDFLAGS_PATH 		= @ldflags_path@
-LDFLAGS_STRICT 		= @ldflags_strict@
-LDFLAGS_UTIL 		= @ldflags_util@
-LDFLAGS_LAST 		= @ldflags_last@
-LDFLAGS_ONCE 		= @ldflags_once@
+CFLAGS_COMMON 		+= @cflags_common@
+CFLAGS_DEBUG 		+= @cflags_debug@
+CFLAGS_CMDLINE 		+= @cflags_cmdline@
+CFLAGS_CONFIG 		+= @cflags_config@
+CFLAGS_SYSROOT 		+= @cflags_sysroot@
+CFLAGS_OS		+= @cflags_os@
+CFLAGS_SITE		+= @cflags_site@
+CFLAGS_PATH 		+= @cflags_path@
+CFLAGS_STRICT 		+= @cflags_strict@
+CFLAGS_UTIL 		+= @cflags_util@
+CFLAGS_LAST 		+= @cflags_last@
+CFLAGS_ONCE 		+= @cflags_once@
+
+LDFLAGS_COMMON 		+= @ldflags_common@
+LDFLAGS_DEBUG 		+= @ldflags_debug@
+LDFLAGS_CMDLINE 	+= @ldflags_cmdline@
+LDFLAGS_CONFIG 		+= @ldflags_config@
+LDFLAGS_SYSROOT 	+= @ldflags_sysroot@
+LDFLAGS_PATH 		+= @ldflags_path@
+LDFLAGS_STRICT 		+= @ldflags_strict@
+LDFLAGS_UTIL 		+= @ldflags_util@
+LDFLAGS_LAST 		+= @ldflags_last@
+LDFLAGS_ONCE 		+= @ldflags_once@
 
 USER_CC                 = @user_cc@
 USER_CPP                = @user_cpp@
@@ -87,15 +87,10 @@ ELF_EH_FRAME 		= @elf_eh_frame@
 ELF_HASH_STYLE 		= @elf_hash_style@
 ELF_CONFIG_DEFS 	= @elf_config_defs@
 
-NATIVE_CC 		= @native_cc@
-NATIVE_CC_HOST		= @native_cc_host@
-NATIVE_CC_CFGHOST	= @native_cc_cfghost@
-NATIVE_CC_CFLAGS	= @native_cc_cflags@
-NATIVE_CC_LDFLAGS	= @native_cc_ldflags@
-
-NATIVE_OS 		= @native_os@
-NATIVE_OS_BITS 		= @native_os_bits@
-NATIVE_OS_UNDERSCORE	= @native_os_underscore@
+NATIVE_HOST		= @native_host@
+NATIVE_CFGHOST		= @native_cfghost@
+NATIVE_CFLAGS		= @native_cflags@
+NATIVE_LDFLAGS		= @native_ldflags@
 
 ALL_SHARED              = @all_shared@
 ALL_STATIC              = @all_static@
@@ -114,10 +109,8 @@ static:
 install-extras:
 install-app-extras:
 
-include $(PROJECT_DIR)/sysinfo/host/$(HOST).mk
-include $(PROJECT_DIR)/sysinfo/compiler/$(COMPILER).mk
-include $(PROJECT_DIR)/sysinfo/toolchain/$(TOOLCHAIN).mk
-include $(PROJECT_DIR)/sysinfo/os/$(OS).mk
+include ./ccenv/host.mk
+include ./ccenv/native.mk
 
 include ./cfgdefs.mk
 include ./usrdefs.mk
@@ -259,7 +252,7 @@ host.tag:	Makefile
 		mv host.tmp host.tag
 
 version.tag:	$(GIT_REFERENCE_INDEX) dirs.tag
-		$(PROJECT_DIR)/sysinfo/version.sh	\
+		$(PROJECT_DIR)/sofort/version.sh	\
 			-s $(SOURCE_DIR)		\
 			-o build/$(PACKAGE)_version.h	\
 			-p $(PACKAGE)
@@ -424,10 +417,13 @@ clean:		clean-implib
 
 .display-build:
 		@echo NATIVE_CC:'              '$(NATIVE_CC)
-		@echo NATIVE_CC_HOST:'         '$(NATIVE_CC_HOST)
-		@echo NATIVE_CC_CFGHOST:'      '$(NATIVE_CC_CFGHOST)
-		@echo NATIVE_CC_CFLAGS:'       '$(NATIVE_CC_CFLAGS)
-		@echo NATIVE_CC_LDFLAGS:'      '$(NATIVE_CC_LDFLAGS)
+		@echo NATIVE_CPP:'             '$(NATIVE_CPP)
+		@echo NATIVE_CXX:'             '$(NATIVE_CXX)
+
+		@echo NATIVE_HOST:'            '$(NATIVE_HOST)
+		@echo NATIVE_CFGHOST:'         '$(NATIVE_CFGHOST)
+		@echo NATIVE_CFLAGS:'          '$(NATIVE_CFLAGS)
+		@echo NATIVE_LDFLAGS:'         '$(NATIVE_LDFLAGS)
 		@echo
 		@echo NATIVE_OS:'              '$(NATIVE_OS)
 		@echo NATIVE_OS_BITS:'         '$(NATIVE_OS_BITS)
diff --git a/config.usage b/config.usage
index f384ffe..0556093 100644
--- a/config.usage
+++ b/config.usage
@@ -154,10 +154,13 @@ supported variables:
 	ELF_CONFIG_DEFS
 
 	NATIVE_CC
-	NATIVE_CC_HOST
-	NATIVE_CC_CFGHOST
-	NATIVE_CC_CFLAGS
-	NATIVE_CC_LDFLAGS
+	NATIVE_CPP
+	NATIVE_CXX
+
+	NATIVE_HOST
+	NATIVE_CFGHOST
+	NATIVE_CFLAGS
+	NATIVE_LDFLAGS
 
 	NATIVE_OS
 	NATIVE_OS_BITS
diff --git a/configure b/configure
index 49596b9..e3a3bbb 100755
--- a/configure
+++ b/configure
@@ -69,6 +69,18 @@ init_vars()
 		eval "$mb_expr"
 	done
 
+	# ccenv
+	. $mb_project_dir/sofort/ccenv/ccenv.sh
+
+	if ! readlink ./ccenv > /dev/null; then
+		if [ -d ./ccenv ]; then
+			rm -f ./ccenv/host.mk
+			rm -f ./ccenv/native.mk
+			rmdir ./ccenv
+		fi
+	fi
+
+	# config.project
 	if [ -z "$mb_config" ]; then
 		. $mb_project_dir/config.project
 	else
@@ -169,19 +181,18 @@ init_vars()
 	mb_elf_config_defs=$ELF_CONFIG_DEFS
 
 	# overrides
-	mb_native_cc=$NATIVE_CC
-	mb_native_cc_host=$NATIVE_CC_HOST
-	mb_native_cc_cfghost=$NATIVE_CC_CFGHOST
-	mb_native_cc_cflags=$NATIVE_CC_CFLAGS
-	mb_native_cc_ldflags=$NATIVE_CC_LDFLAGS
-
-	mb_native_os=$NATIVE_OS
-	mb_native_os_bits=$NATIVE_OS_BITS
-	mb_native_os_underscore=$NATIVE_OS_UNDERSCORE
-
 	mb_user_cc=$CC
 	mb_user_cpp=$CPP
 	mb_user_cxx=$CXX
+
+	mb_native_cc=$NATIVE_CC
+	mb_native_cpp=$NATIVE_CPP
+	mb_native_cxx=$NATIVE_CXX
+
+	mb_native_host=$NATIVE_HOST
+	mb_native_cfghost=$NATIVE_CFGHOST
+	mb_native_cflags=$NATIVE_CFLAGS
+	mb_native_ldflags=$NATIVE_LDFLAGS
 }
 
 
@@ -351,132 +362,6 @@ common_defaults()
 			mb_cflags_debug='-g3 -O0'
 		fi
 	fi
-
-	# toolchain
-	if [ -z "$mb_toolchain" ]; then
-		mb_toolchain='binutils'
-	fi
-
-	# fallback host recipe
-	if [ -n "$mb_host" ]; then
-		if ! [ -f $mb_project_dir/sysinfo/host/$mb_host.mk ]; then
-			if [ -z "$mb_cross_compile" ]; then
-				mb_cross_compile=$mb_host-
-			fi
-
-			mb_host='any-host';
-		fi
-	fi
-
-	# fallback compiler recipe
-	if [ -n "$mb_compiler" ]; then
-		if ! [ -f $mb_project_dir/sysinfo/compiler/$mb_compiler.mk ]; then
-			mb_compiler='any-compiler'
-		fi
-	fi
-}
-
-
-native_defaults()
-{
-	# CC (when set, must be valid)
-	if [ -n "$CC" ]; then
-		$CC -dM -E - < /dev/null > /dev/null
-	fi
-
-	# compiler
-	[ -z "$mb_native_cc" ] && mb_native_cc='cc'
-	$mb_native_cc -dM -E - < /dev/null > /dev/null 2>/dev/null || mb_native_cc=
-
-	[ -z "$mb_native_cc" ] && mb_native_cc='gcc'
-	$mb_native_cc -dM -E - < /dev/null > /dev/null 2>/dev/null || mb_native_cc=
-
-	[ -z "$mb_native_cc" ] && mb_native_cc='clang'
-	$mb_native_cc -dM -E - < /dev/null > /dev/null 2>/dev/null || mb_native_cc=
-
-	[ -z "$mb_native_cc" ] && mb_native_cc='cparser'
-	$mb_native_cc -dM -E - < /dev/null > /dev/null 2>/dev/null || mb_native_cc=
-
-	if [ -z "$mb_native_cc" ]; then
-		echo "configure: info: could not find a working native compiler."
-		mb_native_cc='false'
-	fi
-
-	if [ -z "$mb_native_cc_host" ]; then
-		mb_native_cc_host=$($mb_native_cc $mb_native_cc_cflags -dumpmachine)
-	fi
-
-	if [ -z "$mb_compiler" ]; then
-		$mb_native_cc -dM -E - < /dev/null | grep -q '__clang__' && mb_compiler='clang'
-	fi
-
-	if [ -z "$mb_compiler" ]; then
-		$mb_native_cc -dM -E - < /dev/null | grep -q '__GCC' && mb_compiler='gcc'
-	fi
-
-	if [ -z "$mb_compiler" ]; then
-		$mb_native_cc -dM -E - < /dev/null | grep -q "^gcc" && mb_compiler='gcc'
-	fi
-
-	if [ -z "$mb_compiler" ]; then
-		$mb_native_cc -dM -E - < /dev/null | grep -q '__CPARSER__' && mb_compiler='cparser'
-	fi
-
-	if [ -z "$mb_compiler" ]; then
-		echo "configure: info: could not identify the native compiler."
-		mb_compiler='any-compiler'
-	fi
-
-
-	# host
-	if [ -z "$mb_host" ]; then
-		mb_host='native'
-	fi
-
-
-	# target
-	if [ -z "$mb_target" ]; then
-		mb_target='native'
-	fi
-
-
-	# os
-	if [ -z "$mb_native_os" ]; then
-		mb_native_os=$(uname | tr '[:upper:]' '[:lower:]')
-	fi
-
-	mb_native_os_sizeof_pointer=$($mb_native_cc -dM -E - < /dev/null \
-			| awk '$2 == "__SIZEOF_POINTER__" { print $3 }')
-
-	mb_native_os_bits=$((8 * ${mb_native_os_sizeof_pointer:-0}))
-
-	if [ $mb_native_os_bits = 32 ]; then
-		mb_native_os_underscore='_'
-	else
-		mb_native_os_underscore=''
-	fi
-
-	if [ -z "$mb_native_os_sizeof_pointer" ]; then
-		warning_msg "config error: could not determine size of pointer on native system."
-	fi
-
-	# grumpily support crooked uname output
-	if ! [ -f $mb_project_dir/sysinfo/os/$mb_native_os.mk ]; then
-		mb_native_os=$(echo $mb_native_os | cut -d'_' -f1)
-	fi
-
-	# fallback os recipe
-	if ! [ -f $mb_project_dir/sysinfo/os/$mb_native_os.mk ]; then
-		mb_native_os='any-os';
-	fi
-}
-
-
-cross_defaults()
-{
-	if [ -z "$mb_cross_compile" ] && [ "$mb_host" != native ]; then
-		mb_cross_compile=$mb_host'-'
-	fi
 }
 
 
@@ -517,23 +402,18 @@ config_copy()
 		$mb_project_dir/Makefile.in    \
 			| sed -e 's/[ \t]*$//g' \
 			> $mb_pwd/Makefile.tmp
+}
 
-	if [ -z "$mb_cchost" ]; then
-		if [ "$mb_host" = 'native' ]; then
-			if [ -n "$mb_user_cc" ]; then
-				mbt_cc="$mb_user_cc"
-			else
-				mbt_cc="$mb_native_cc"
-			fi
 
-			mbt_cflags=$(make -f $mb_pwd/Makefile.tmp .display-cflags)
-			mb_cchost=$($mbt_cc $mbt_cflags -dumpmachine)
-		else
-			mb_cchost=$mb_host
-		fi
-	fi
-}
+config_ccenv()
+{
+	mkdir -p ./ccenv
+	touch ./ccenv/host.mk
+	touch ./ccenv/native.mk
 
+	ccenv_set_host_variables
+	ccenv_set_native_variables
+}
 
 config_custom()
 {
@@ -631,7 +511,32 @@ verify_build_directory
 # two: args
 for arg ; do
 	case "$arg" in
-		--help)	usage
+		--help)
+			usage
+			;;
+		--help=ccenv)
+			ccenv_usage
+			;;
+
+		# ccenv
+		--cross-compile=*)
+			mb_cross_compile=${arg#*=}
+			;;
+		--compiler=*)
+			mb_compiler=${arg#*=}
+			;;
+		--toolchain=*)
+			mb_toolchain=${arg#*=}
+			;;
+		--zealous)
+			mb_agnostic=yes
+			mb_zealous=
+			;;
+		--zealous=*)
+			mb_zealous=${arg#*=}
+			;;
+		--ccenv=*)
+			mb_ccenv=${arg#*=}
 			;;
 
 		# dirs
@@ -724,18 +629,9 @@ for arg ; do
 		--arch=*)
 			mb_arch=${arg#*=}
 			;;
-		--compiler=*)
-			mb_compiler=${arg#*=}
-			;;
-		--toolchain=*)
-			mb_toolchain=${arg#*=}
-			;;
 		--sysroot=*)
 			mb_sysroot=${arg#*=}
 			;;
-		--cross-compile=*)
-			mb_cross_compile=${arg#*=}
-			;;
 		--shell=*)
 			mb_shell=${arg#*=}
 			;;
@@ -867,14 +763,12 @@ fi
 
 # four: defaults
 common_defaults
-native_defaults
-cross_defaults
-
 
 
 # five: config
 config_flags
 config_copy
+config_ccenv
 config_custom
 config_cfghost
 config_support
diff --git a/sofort/ccenv/ccenv.in b/sofort/ccenv/ccenv.in
new file mode 100644
index 0000000..531a7dd
--- /dev/null
+++ b/sofort/ccenv/ccenv.in
@@ -0,0 +1,85 @@
+# @ccenv_cfgtype@ system flavor
+OS                              = @ccenv_os@
+OS_SEMANTICS                    = @ccenv_os_semantics@
+
+OS_DSO_EXRULES                  = @ccenv_os_dso_exrules@
+OS_DSO_LINKAGE                  = @ccenv_os_dso_linkage@
+
+OS_APP_PREFIX                   = @ccenv_os_app_prefix@
+OS_APP_SUFFIX                   = @ccenv_os_app_suffix@
+
+OS_LIB_PREFIX                   = @ccenv_os_lib_prefix@
+OS_LIB_SUFFIX                   = @ccenv_os_lib_suffix@
+
+OS_IMPLIB_EXT                   = @ccenv_os_implib_ext@
+OS_LIBDEF_EXT                   = @ccenv_os_libdef_ext@
+
+OS_ARCHIVE_EXT                  = @ccenv_os_archive_ext@
+OS_SONAME                       = @ccenv_os_soname@
+
+OS_LIB_PREFIXED_SUFFIX          = @ccenv_os_lib_prefixed_suffix@
+OS_LIB_SUFFIXED_SUFFIX          = @ccenv_os_lib_suffixed_suffix@
+
+# @ccenv_cfgtype@ characteristics
+CC_HOST                         = @ccenv_cc_host@
+CC_BITS                         = @ccenv_cc_bits@
+
+CC_BINFMT                       = @ccenv_cc_binfmt@
+CC_UNDERSCORE                   = @ccenv_cc_underscore@
+
+CC_ARCH_BFD                     = @ccenv_cc_arch_bfd@
+CC_ARCH_LLVM                    = @ccenv_cc_arch_llvm@
+
+# incompatible tool variants
+AS_ASM                          = @ccenv_as_asm@
+AS_LL                           = @ccenv_as_ll@
+AS_MC                           = @ccenv_as_mc@
+
+LD_BFD                          = @ccenv_ld_bfd@
+LD_GOLD                         = @ccenv_ld_gold@
+LD_LLD                          = @ccenv_ld_lld@
+
+OBJDUMP_BFD                     = @ccenv_objdump_bfd@
+OBJDUMP_LLVM                    = @ccenv_objdump_llvm@
+
+READELF_BFD                     = @ccenv_readelf_bfd@
+READELF_LLVM                    = @ccenv_readelf_llvm@
+
+# @ccenv_cfgtype@ primary tools
+CC                              = @ccenv_cc@
+CPP                             = @ccenv_cpp@
+CXX                             = @ccenv_cxx@
+
+AR                              = @ccenv_ar@
+NM                              = @ccenv_nm@
+OBJDUMP                         = @ccenv_objdump@
+RANLIB                          = @ccenv_ranlib@
+SIZE                            = @ccenv_size@
+STRIP                           = @ccenv_strip@
+STRINGS                         = @ccenv_strings@
+
+ADDR2LINE                       = @ccenv_addr2line@
+COV                             = @ccenv_cov@
+CXXFILT                         = @ccenv_cxxfilt@
+OBJCOPY                         = @ccenv_objcopy@
+
+ELFEDIT                         = @ccenv_elfedit@
+READELF                         = @ccenv_readelf@
+READOBJ                         = @ccenv_readobj@
+
+PERK                            = @ccenv_perk@
+MDSO                            = @ccenv_mdso@
+DLLTOOL                         = @ccenv_dlltool@
+
+WINDMC                          = @ccenv_windmc@
+WINDRC                          = @ccenv_windrc@
+
+# @ccenv_cfgtype@ secondary tools
+# note: the direct use of $(@ccenv_makevar_prefix@LD) is highly discouraged
+AS                              = @ccenv_as@
+LD                              = @ccenv_ld@
+
+# @ccenv_cfgtype@ cflags
+CFLAGS_OS                      += @ccenv_cflags_os@
+CFLAGS_PIC                     += @ccenv_cflags_pic@
+
diff --git a/sofort/ccenv/ccenv.sh b/sofort/ccenv/ccenv.sh
new file mode 100644
index 0000000..91d9309
--- /dev/null
+++ b/sofort/ccenv/ccenv.sh
@@ -0,0 +1,1021 @@
+# ccenv.sh: sofort's tool-finding bits,
+# invoked from within the project-agnostic configure script.
+
+# invocation and names of binary tools:
+# agnostic names (ar, nm, objdump, ...);
+# target-prefixed agnostic names (x86_64-nt64-midipix-ar, ...);
+# branded names (llvm-ar, llvm-nm, llvm-objdump, ...);
+# target-prefixed branded names (x86_64-linux-gnu-gcc-ar, ...);
+# target-specifying branded tools (llvm-ar --target=x86_64-linux, ...).
+
+# cross-compilation: default search order:
+# target-prefixed agnostic tools;
+# target-prefixed branded tools, starting with the prefix
+# most commonly associated with the selected compiler (that is,
+# ``gcc'' when using gcc, and ``llvm'' when using clang);
+# target-speficying branded tools, starting once again with the
+# prefix most commonly associated with the selected compiler.
+
+# internal variables of interest:
+# ccenv_cfgtype: the type of host being tested (host/native)
+# ccenv_cfgfile: the configuration file for the host being tested
+# ccenv_cflags:  the comprehensive cflags for the host being tested
+# ccenv_cchost:  the host being tested, as reported by -dumpmachine
+
+
+ccenv_usage()
+{
+	cat "$mb_project_dir"/sofort/ccenv/ccenv.usage
+	exit 0
+}
+
+
+ccenv_newline()
+{
+	printf '\n' >> "$ccenv_cfgfile"
+}
+
+
+ccenv_comment()
+{
+	ccenv_internal_str='#'
+
+	for ccenv_internal_arg ; do
+		ccenv_internal_str="$ccenv_internal_str $ccenv_internal_arg"
+	done
+
+	printf '%s\n' "$ccenv_internal_str" >> "$ccenv_cfgfile"
+}
+
+
+ccenv_find_tool()
+{
+	if [ -z "$ccenv_prefixes" ]; then
+		for ccenv_tool in $ccenv_candidates; do
+			command -v "$ccenv_tool" > /dev/null && return 0
+		done
+
+		ccenv_tool=false
+
+		return 0
+	fi
+
+	for ccenv_prefix in $ccenv_prefixes; do
+		for ccenv_candidate in $ccenv_candidates; do
+			ccenv_tool="$ccenv_prefix$ccenv_candidate"
+			command -v "$ccenv_tool" > /dev/null && return 0
+		done
+	done
+
+	for ccenv_tool in $ccenv_candidates; do
+		command -v "$ccenv_tool" > /dev/null && return 0
+	done
+
+	ccenv_tool=false
+
+	return 0
+}
+
+
+ccenv_set_primary_tools()
+{
+	ccenv_core_tools="ar nm objdump ranlib size strip strings objcopy"
+	ccenv_hack_tools="addr2line cov elfedit readelf readobj"
+	ccenv_peep_tools="perk mdso dlltool windmc windres"
+
+	for __tool in $ccenv_core_tools $ccenv_hack_tools $ccenv_peep_tools; do
+		if [ -n "$mb_agnostic" ]; then
+			ccenv_candidates=" $__tool"
+
+		elif [ -n "$mb_zealous" ]; then
+			ccenv_candidates="$mb_zealous-$__tool"
+
+		elif [ "$mb_toolchain" = 'gcc' ]; then
+			ccenv_candidates="gcc-$__tool"
+			ccenv_candidates="$ccenv_candidates $__tool"
+			ccenv_candidates="$ccenv_candidates llvm-$__tool"
+
+		elif [ "$mb_toolchain" = 'llvm' ]; then
+			ccenv_candidates="llvm-$__tool"
+			ccenv_candidates="$ccenv_candidates $__tool"
+			ccenv_candidates="$ccenv_candidates gcc-$__tool"
+
+		elif [ -n "$mb_toolchain" ]; then
+			ccenv_candidates="$mb_toolchain-$__tool"
+			ccenv_candidates="$ccenv_candidates $__tool"
+			ccenv_candidates="$ccenv_candidates gcc-$__tool"
+			ccenv_candidates="$ccenv_candidates llvm-$__tool"
+
+		else
+			ccenv_candidates="$__tool"
+			ccenv_candidates="$ccenv_candidates gcc-$__tool"
+			ccenv_candidates="$ccenv_candidates llvm-$__tool"
+		fi
+
+		if [ "$ccenv_cfgtype" = 'host' ]; then
+			ccenv_var_prefix='mb_'
+		else
+			ccenv_var_prefix='mb_native_'
+		fi
+
+		ccenv_var_name=$ccenv_var_prefix$__tool
+		ccenv_var_expr='${'$ccenv_var_name':-}'
+		eval ccenv_var_val=$ccenv_var_expr
+
+		if [ -n "$ccenv_var_val" ]; then
+			eval ccenv_$__tool="$ccenv_var_val"
+		else
+			ccenv_find_tool
+			eval ccenv_$__tool="$ccenv_tool"
+		fi
+	done
+
+	# windrc
+	ccenv_windrc="$ccenv_windres"
+}
+
+ccenv_set_tool_variants()
+{
+	# as (asm)
+	ccenv_candidates=as
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" = false ]; then
+		ccenv_as_asm=
+	else
+		$ccenv_tool --help | grep -i '.bc assembler' \
+		|| ccenv_as_asm="$ccenv_tool"
+	fi
+
+	# as (ll)
+	ccenv_candidates=llvm-as
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" != false ]; then
+		ccenv_as_ll="$ccenv_tool"
+	fi
+
+	# as (mc)
+	ccenv_candidates=llvm-mc
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" != false ]; then
+		ccenv_as_mc="$ccenv_tool"
+	fi
+
+	# ld (bfd)
+	ccenv_candidates=ld.bfd
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" != false ]; then
+		ccenv_ld_bfd="$ccenv_tool"
+	fi
+
+	# ld (gold)
+	ccenv_candidates=ld.gold
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" != false ]; then
+		ccenv_ld_gold="$ccenv_tool"
+	fi
+
+	# ld (lld)
+	ccenv_candidates=lld
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" != false ]; then
+		ccenv_ld_lld="$ccenv_tool"
+	fi
+
+	# objdump (bfd)
+	ccenv_candidates=objdump
+	ccenv_find_tool
+
+	$ccenv_tool --version | grep -i Binutils    \
+			> /dev/null                 \
+		&& ccenv_objdump_bfd="$ccenv_tool"
+
+	# objdump (llvm)
+	ccenv_candidates=llvm-objdump
+	ccenv_find_tool
+
+	$ccenv_tool --version | grep -i LLVM        \
+			> /dev/null                 \
+		&& ccenv_objdump_llvm="$ccenv_tool"
+
+	# readelf (bfd)
+	ccenv_candidates=readelf
+	ccenv_find_tool
+
+	$ccenv_tool --version | grep -i Binutils    \
+			> /dev/null                 \
+		&& ccenv_readelf_bfd="$ccenv_tool"
+
+	# readelf (llvm)
+	ccenv_candidates=llvm-readelf
+	ccenv_find_tool
+
+	$ccenv_tool --version | grep -i LLVM        \
+			> /dev/null                 \
+		&& ccenv_readelf_llvm="$ccenv_tool"
+
+	# as
+	if [ -n "$ccenv_cc" ]; then
+		ccenv_as='$('"$ccenv_makevar_prefix"'CC) -x assembler'
+	elif [ -n "$mb_agnostic" ]; then
+		ccenv_as='$('"$ccenv_makevar_prefix"'AS_ASM)'
+	elif [ "$mb_zealous" = 'gcc' ]; then
+		ccenv_as='$('"$ccenv_makevar_prefix"'AS_ASM)'
+	elif [ -n "$mb_zealous" = 'llvm' ]; then
+		ccenv_as='$('"$ccenv_makevar_prefix"'AS_MC)'
+	elif [ "$mb_toolchain" = 'gcc' ]; then
+		ccenv_as='$('"$ccenv_makevar_prefix"'AS_ASM)'
+	elif [ "$mb_toolchain" = 'llvm' ]; then
+		ccenv_as='$('"$ccenv_makevar_prefix"'AS_MC)'
+	fi
+
+	# ld
+	if [ -n "$ccenv_cc" ]; then
+		ccenv_ld='$('"$ccenv_makevar_prefix"'CC) -nostdlib -nostartfiles'
+	fi
+}
+
+ccenv_set_c_compiler_candidates()
+{
+	if   [ -n "$mb_compiler" ]; then
+		ccenv_candidates="$mb_compiler"
+
+	elif [ -n "$mb_agnostic" ]; then
+		ccenv_candidates="c99 c11 cc"
+
+	elif [ "$mb_zealous" = 'gcc' ]; then
+		ccenv_candidates="gcc"
+
+	elif [ "$mb_zealous" = 'llvm' ]; then
+		ccenv_candidates="clang"
+
+	elif [ "$mb_toolchain" = 'gcc' ]; then
+		ccenv_candidates="gcc c99 c11 cc clang"
+
+	elif [ "$mb_toolchain" = 'llvm' ]; then
+		ccenv_candidates="clang c99 c11 cc gcc"
+
+	elif [ -n "$mb_toolchain" ]; then
+		ccenv_candidates="$mb_toolchain c99 c11 cc gcc clang"
+
+	else
+		ccenv_candidates="c99 c11 cc gcc clang"
+	fi
+}
+
+
+ccenv_set_cc()
+{
+	if [ -z "$ccenv_cc" ]; then
+		ccenv_set_c_compiler_candidates
+		ccenv_find_tool
+		ccenv_cc="$ccenv_tool"
+	fi
+
+	if [ "$ccenv_cc" = false ] && [ -n "$mb_compiler" ]; then
+		ccenv_cc="$mb_compiler"
+	fi
+
+	ccenv_cc_cmd="$ccenv_cc"
+
+	if [ "$ccenv_cfgtype" = 'native' ]; then
+		return 0
+	fi
+
+	if [ -n "$mb_cchost" ]; then
+		ccenv_host="$mb_cchost"
+	elif [ -n "$mb_host" ]; then
+		ccenv_host="$mb_host"
+	else
+		ccenv_host=
+	fi
+
+	if [ -z "$ccenv_host" ]; then
+		ccenv_host=$($ccenv_cc $ccenv_cflags -dumpmachine 2>/dev/null)
+		ccenv_cchost=$ccenv_host
+	else
+		ccenv_tmp=$(mktemp)
+		ccenv_cmd="$ccenv_cc --target=$ccenv_host -E -xc -"
+
+		if [ -z "$mb_user_cc" ]; then
+			$ccenv_cmd < /dev/null > /dev/null \
+				2>"$ccenv_tmp" || true
+
+			ccenv_errors=$(cat "$ccenv_tmp")
+
+			if [ -z "$ccenv_errors" ]; then
+				ccenv_tflags="--target=$ccenv_host"
+				ccenv_cc="$ccenv_cc $ccenv_tflags"
+			fi
+		fi
+
+		ccenv_cchost=$($ccenv_cc $ccenv_cflags -dumpmachine 2>/dev/null)
+	fi
+
+	if [ "$ccenv_cchost" != "$ccenv_host" ]; then
+		printf 'ccenv:\n' >&2
+		printf 'ccenv: ccenv_host:   %s \n' $ccenv_host >&2
+		printf 'ccenv: ccenv_cchost: %s \n' $ccenv_cchost >&2
+
+		if [ -z "$ccenv_tflags" ]; then
+			printf 'ccenv:\n' >&2
+			printf 'ccenv: ccenv_host and ccenv_cchost do not match, most likely because:\n' >&2
+			printf 'ccenv: (1) you explicitly set CC (or passed --compiler=...)\n' >&2
+			printf 'ccenv: (2) the selected compiler does not accept --target=...\n' >&2
+			printf 'ccenv: (3) the host reported by -dumpmachine differs from the one you requested.\n' >&2
+		fi
+
+		if [ -n "$ccenv_errors" ]; then
+			printf 'ccenv:\n' >&2
+			printf 'ccenv: something went wrong, see the command and compiler message below.\n\n' >&2
+			printf 'cmd: %s < /dev/null > /dev/null\n' "$ccenv_cmd" >&2
+			printf '%s\n\n' "$ccenv_errors" >&2
+		else
+			printf 'ccenv:\n' >&2
+			printf 'ccenv: something went wrong, bailing out.\n\n' >&2
+		fi
+
+		return 2
+	fi
+}
+
+ccenv_set_cpp()
+{
+	case "$ccenv_cc_cmd" in
+		cc | c99 | c11 | gcc)
+			ccenv_cpp_prefix=
+			ccenv_candidates="cpp" ;;
+
+		clang )
+			ccenv_cpp_prefix=
+			ccenv_candidates="clang-cpp" ;;
+
+		*-cc )
+			ccenv_cpp_prefix=${ccenv_cc_cmd%-cc*}-
+			ccenv_candidates="${ccenv_cpp_prefix}cpp" ;;
+
+		*-c99 )
+			ccenv_cpp_prefix=${ccenv_cc_cmd%-c99*}-
+			ccenv_candidates="${ccenv_cpp_prefix}cpp" ;;
+
+		*-c11 )
+			ccenv_cpp_prefix=${ccenv_cc_cmd%-c11*}-
+			ccenv_candidates="${ccenv_cpp_prefix}cpp" ;;
+
+		*-gcc )
+			ccenv_cpp_prefix=${ccenv_cc_cmd%-gcc*}-
+			ccenv_candidates="${ccenv_cpp_prefix}cpp" ;;
+
+		*-clang )
+			ccenv_cpp_prefix=${ccenv_cc_cmd%-clang*}-
+			ccenv_candidates="${ccenv_cpp_prefix}clang-cpp" ;;
+
+		* )
+			ccenv_cpp="$ccenv_cc -E"
+			return 0
+	esac
+
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" = false ]; then
+		ccenv_cpp="$ccenv_cc -E"
+	elif [ -n "$ccenv_tflags" ]; then
+		ccenv_cpp="$ccenv_tool $ccenv_tflags"
+	else
+		ccenv_cpp="$ccenv_tool"
+	fi
+}
+
+ccenv_set_cxx()
+{
+	case "$ccenv_cc_cmd" in
+		cc | c99 | c11 )
+			ccenv_cxx_prefix=
+			ccenv_candidates="cxx c++" ;;
+
+		gcc )
+			ccenv_cxx_prefix=
+			ccenv_candidates="g++" ;;
+
+		clang )
+			ccenv_cxx_prefix=
+			ccenv_candidates="clang++" ;;
+
+		*-gcc )
+			ccenv_cpp_prefix=${ccenv_cc_cmd%-gcc*}-
+			ccenv_candidates="${ccenv_cpp_prefix}g++" ;;
+
+		*-clang )
+			ccenv_cpp_prefix=${ccenv_cc_cmd%-clang*}-
+			ccenv_candidates="${ccenv_cpp_prefix}clang++" ;;
+
+		*cc )
+			ccenv_cxx_prefix=${ccenv_cc_cmd%cc*}
+			ccenv_candidates="${ccenv_cpp_prefix}++" ;;
+
+		* )
+			ccenv_cxx="$ccenv_cc -xc++"
+			return 0
+	esac
+
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" = false ]; then
+		ccenv_cxx="$ccenv_cc -xc++"
+	elif [ -n "$ccenv_tflags" ]; then
+		ccenv_cxx="$ccenv_tool $ccenv_tflags"
+	else
+		ccenv_cxx="$ccenv_tool"
+	fi
+}
+
+ccenv_set_cc_host()
+{
+	ccenv_cc_host="$ccenv_cchost"
+}
+
+ccenv_set_cc_bits()
+{
+	ccenv_internal_size=
+	ccenv_internal_type='void *'
+	ccenv_internal_test='char x[(sizeof(%s) == %s/8) ? 1 : -1];'
+
+	for ccenv_internal_guess in 64 32 128; do
+		if [ -z $ccenv_internal_size ]; then
+			ccenv_internal_str=$(printf "$ccenv_internal_test"  \
+				"$ccenv_internal_type"                      \
+				"$ccenv_internal_guess")
+
+			printf '%s' "$ccenv_internal_str"           \
+					| $ccenv_cc -S -xc - -o -   \
+					  $ccenv_cflags             \
+				> /dev/null 2>/dev/null             \
+			&& ccenv_internal_size=$ccenv_internal_guess
+		fi
+	done
+
+	ccenv_cc_bits=$ccenv_internal_size
+}
+
+ccenv_set_cc_underscore()
+{
+	ccenv_fn_name='ZmYaXyWbVe_UuTnSdReQrPsOcNoNrLe'
+	ccenv_fn_code='int %s(void){return 0;}'
+
+	printf "$ccenv_fn_code" $ccenv_fn_name  \
+		| $ccenv_cc -xc - -S -o -       \
+		| grep _$ccenv_fn_name          \
+			> /dev/null             \
+		&& ccenv_cc_underscore='_'
+
+	return 0
+}
+
+ccenv_create_framework_executable()
+{
+	if [ -f $ccenv_image ]; then
+		mv $ccenv_image $ccenv_image.tmp
+		rm -f $ccenv_image.tmp
+	fi
+
+	printf 'int main(void){return 0;}'  \
+		| $ccenv_cc -xc -           \
+			-o $ccenv_image     \
+	|| return 1
+
+	return 0
+}
+
+ccenv_create_freestanding_executable()
+{
+	if [ -f $ccenv_image ]; then
+		mv $ccenv_image $ccenv_image.tmp
+		rm -f $ccenv_image.tmp
+	fi
+
+	if [ -z "ccenv_cc_underscore" ]; then
+		ccenv_start_fn='_start'
+	else
+		ccenv_start_fn='start'
+	fi
+
+	printf 'int %s(void){return 0;}' "$ccenv_start_fn"  \
+		| $ccenv_cc -xc -                           \
+			-ffreestanding                      \
+			-nostdlib -nostartfiles             \
+			-o $ccenv_image                     \
+	|| return 1
+
+	ccenv_freestd=yes
+
+	return 0
+}
+
+ccenv_set_cc_binfmt()
+{
+	ccenv_use_perk=
+	ccenv_use_readelf=
+	ccenv_use_readobj=
+	ccenv_use_bfd_objdump=
+	ccenv_use_llvm_objdump=
+
+	ccenv_create_framework_executable               \
+		|| ccenv_create_freestanding_executable \
+		|| return 0
+
+	# PE / perk
+	if [ -n "$ccenv_perk" ]; then
+		$ccenv_perk $ccenv_image 2>/dev/null \
+		&& ccenv_cc_binfmt='PE'               \
+		&& ccenv_use_perk=yes
+	fi
+
+	# ELF / readelf
+	if [ -n "$ccenv_readelf" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		$ccenv_readelf -h $ccenv_image 2>/dev/null        \
+			| grep 'Magic:' | sed -e 's/[ ]*//g'      \
+			| grep 'Magic:7f454c46'                   \
+				> /dev/null                       \
+		&& ccenv_cc_binfmt='ELF'                          \
+		&& ccenv_use_readelf=yes
+	fi
+
+	# a marble of astonishing design:
+	# llvm-readelf also parses PE and Mach-O
+
+	if [ -n "$ccenv_readelf_llvm" ]; then
+		ccenv_readany="$ccenv_readelf_llvm"
+	else
+		ccenv_readany="$ccenv_readelf"
+	fi
+
+	# PE / readelf
+	if [ -n "$ccenv_readany" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		$ccenv_readany -h $ccenv_image 2>/dev/null        \
+			| grep 'Magic:' | sed -e 's/[ ]*//g'      \
+			| grep 'Magic:MZ'                         \
+				> /dev/null                       \
+		&& ccenv_cc_binfmt='PE'                           \
+		&& ccenv_use_readelf=yes
+	fi
+
+	# MACHO-64 / readelf
+	if [ -n "$ccenv_readany" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		$ccenv_readany -h $ccenv_image 2>/dev/null        \
+			| grep -i 'Magic:' | sed -e 's/[ ]*//g'   \
+			| grep -i '(0xfeedfacf)'                  \
+				> /dev/null                       \
+		&& ccenv_cc_binfmt='MACHO'                        \
+		&& ccenv_use_readelf=yes
+	fi
+
+	# MACHO-32 / readelf
+	if [ -n "$ccenv_readany" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		$ccenv_readany -h $ccenv_image 2>/dev/null        \
+			| grep -i 'Magic:' | sed -e 's/[ ]*//g'   \
+			| grep -i '(0xcafebabe)'                  \
+				> /dev/null                       \
+		&& ccenv_cc_binfmt='MACHO'                        \
+		&& ccenv_use_readelf=yes
+	fi
+
+	# MACHO / readobj
+	if [ -n "$ccenv_readobj" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		$ccenv_readobj $ccenv_image 2>/dev/null           \
+			| grep -i 'Format:' | sed 's/ /_/g'       \
+			| grep -i '_Mach-O_'                      \
+				> /dev/null                       \
+		&& ccenv_cc_binfmt='MACHO'                        \
+		&& ccenv_use_readobj=yes
+	fi
+
+	# MACHO / objdump (llvm)
+	if [ -n "$ccenv_objdump" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		$ccenv_objdump -section-headers $ccenv_image      \
+				2>/dev/null                       \
+			| grep -i 'file format Mach-O'            \
+				> /dev/null                       \
+		&& ccenv_cc_binfmt='MACHO'                        \
+		&& ccenv_use_objdump=yes
+	fi
+
+	# MACHO / objdump (bfd)
+	if [ -n "$ccenv_objdump" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		$ccenv_objdump -h  $ccenv_image 2>/dev/null       \
+			| grep -i 'file format Mach-O'            \
+				> /dev/null                       \
+		&& ccenv_cc_binfmt='MACHO'                        \
+		&& ccenv_use_objdump=yes
+	fi
+
+	# PE / objdump (bfd)
+	if [ -n "$ccenv_objdump" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		$ccenv_objdump -h  $ccenv_image 2>/dev/null       \
+			| grep -i 'file format pei-'              \
+				> /dev/null                       \
+		&& ccenv_cc_binfmt='PE'                           \
+		&& ccenv_use_bfd_objdump=yes
+	fi
+}
+
+ccenv_set_os_pe()
+{
+	if [ -n "$ccenv_freestd" ]; then
+		case "$ccenv_cchost" in
+			*-midipix | *-midipix-* )
+				ccenv_os='midipix' ;;
+			*-mingw | *-mingw32 | *-mingw64 )
+				ccenv_os='mingw' ;;
+			*-mingw-* | *-mingw32-* | *-mingw64 )
+				ccenv_os='mingw' ;;
+			*-msys | *-msys2 | *-msys-* | *-msys2-* )
+				ccenv_os='msys' ;;
+			*-cygwin | *-cygwin-* )
+				ccenv_os='cygwin' ;;
+		esac
+	fi
+
+	if [ -n "$ccenv_os" ]; then
+		return 0
+	fi
+
+	if [ -n "$ccenv_use_perk" ]; then
+		ccenv_framework=$($ccenv_perk -y $ccenv_image)
+		ccenv_os=${ccenv_framework#*-*-*-*}
+	fi
+
+	if [ -z "$ccenv_os" ] && [ -n "$ccenv_objdump_bfd" ]; then
+		$ccenv_objdump_bfd -x $ccenv_image | grep -i 'DLL Name' \
+			| grep 'cygwin1.dll' > /dev/null                \
+		&& ccenv_os='cygwin'
+	fi
+
+	if [ -z "$ccenv_os" ] && [ -n "$ccenv_objdump_bfd" ]; then
+		$ccenv_objdump_bfd -x $ccenv_image | grep -i 'DLL Name' \
+			| grep 'msys-2.0.dll' > /dev/null               \
+		&& ccenv_os='msys'
+	fi
+
+	if [ -z "$ccenv_os" ] && [ -n "$ccenv_objdump_bfd" ]; then
+		$ccenv_objdump_bfd -x $ccenv_image          \
+			| grep -i 'DLL Name' | grep '.CRT'  \
+				> /dev/null                 \
+		&& $ccenv_objdump_bfd -x $ccenv_image       \
+			| grep -i 'DLL Name' | grep '.bss'  \
+				> /dev/null                 \
+		&& $ccenv_objdump_bfd -x $ccenv_image       \
+			| grep -i 'DLL Name' | grep '.tls'  \
+				> /dev/null                 \
+		&& ccenv_os='mingw'
+	fi
+}
+
+ccenv_set_os_macho()
+{
+	case "$ccenv_cchost" in
+		*-apple-darwin* )
+			ccenv_os='darwin' ;;
+	esac
+}
+
+ccenv_set_os()
+{
+	case "$ccenv_cc_binfmt" in
+		PE )
+			ccenv_set_os_pe ;;
+		MACHO )
+			ccenv_set_os_macho ;;
+	esac
+
+	if [ -n "$ccenv_os" ]; then
+		return 0
+	fi
+
+	case "$ccenv_cchost" in
+		*-*-*-* )
+			ccenv_tip=${ccenv_host%-*}
+			ccenv_os=${ccenv_tip#*-*-}
+			;;
+
+		*-*-* )
+			ccenv_tip=${ccenv_host%-*}
+			ccenv_os=${ccenv_tip#*-}
+			;;
+	esac
+
+	if [ -z "$ccenv_os" ]; then
+		ccenv_os='anyos'
+	fi
+}
+
+ccenv_set_os_flags()
+{
+	case "$ccenv_os" in
+		darwin )
+			ccenv_cflags_os='-D_DARWIN_C_SOURCE'
+			ccenv_cflags_pic='-fPIC'
+			;;
+		midipix )
+			ccenv_cflags_os=
+			ccenv_cflags_pic='-fPIC'
+			;;
+		cygwin )
+			ccenv_cflags_os=
+			ccenv_cflags_pic=
+			;;
+		msys | msys* | mingw | mingw* )
+			ccenv_cflags_os='-U__STRICT_ANSI__'
+			ccenv_cflags_pic=
+			;;
+		* )
+			ccenv_cflags_os=
+			ccenv_cflags_pic='-fPIC'
+			;;
+	esac
+}
+
+ccenv_set_os_semantics()
+{
+	# binary_format - core_api - ex_api - dependency_resolution
+
+	case "$ccenv_os" in
+		linux )
+			ccenv_os_semantics='elf-posix-linux-ldso'
+			;;
+		bsd )
+			ccenv_os_semantics='elf-posix-bsd-ldso'
+			;;
+		darwin )
+			ccenv_os_semantics='macho-posix-osx-ldso'
+			;;
+		midipix )
+			ccenv_os_semantics='pe-posix-winnt-ldso'
+			;;
+		cygwin )
+			ccenv_os_semantics='pe-hybrid-winnt-unsafe'
+			;;
+		msys )
+			ccenv_os_semantics='pe-hybrid-winnt-unsafe'
+			;;
+		mingw )
+			ccenv_os_semantics='pe-win32-winnt-unsafe'
+			;;
+	esac
+
+	if [ -n "$ccenv_os_semantics" ]; then
+		return 0
+	fi
+
+	if [ -n "$ccenv_cc_binfmt" ]; then
+		ccenv_os_semantics_pattern='%s-posix-anyos-unknown'
+		ccenv_os_semantics=$(printf                   \
+				"$ccenv_os_semantics_pattern"  \
+				"$ccenv_cc_binfmt"              \
+			| tr '[:upper:]' '[:lower:]')
+	else
+		ccenv_os_semantics='unknown-posix-anyos-unknown'
+	fi
+}
+
+ccenv_set_os_dso_exrules()
+{
+	case "$ccenv_os" in
+		midipix )
+			ccenv_os_dso_exrules='pe-mdso'
+			;;
+		* )
+			if [ "$ccenv_cc_binfmt" = 'PE' ]; then
+				ccenv_os_dso_exrules='pe-dlltool'
+			else
+				ccenv_os_dso_exrules='default'
+			fi
+	esac
+}
+
+ccenv_set_os_dso_linkage()
+{
+	# todo: PIC, PIE, and friends
+	ccenv_os_dso_linkage='default'
+}
+
+ccenv_set_os_dso_patterns_darwin()
+{
+	ccenv_os_app_prefix=
+	ccenv_os_app_suffix=
+
+	ccenv_os_lib_prefix=lib
+	ccenv_os_lib_suffix=.dylib
+
+	ccenv_os_implib_ext=.invalid
+	ccenv_os_libdef_ext=.invalid
+
+	ccenv_os_archive_ext=.a
+	ccenv_os_soname=symlink
+
+	ccenv_os_lib_prefixed_suffix=
+	ccenv_os_lib_suffixed_suffix='$(OS_LIB_SUFFIX)'
+}
+
+ccenv_set_os_dso_patterns_mdso()
+{
+	ccenv_os_app_prefix=
+	ccenv_os_app_suffix=
+
+	ccenv_os_lib_prefix=lib
+	ccenv_os_lib_suffix=.so
+
+	ccenv_os_implib_ext=.lib.a
+	ccenv_os_libdef_ext=.so.def
+
+	ccenv_os_archive_ext=.a
+	ccenv_os_soname=symlink
+
+	ccenv_os_lib_prefixed_suffix='$(OS_LIB_SUFFIX)'
+	ccenv_os_lib_suffixed_suffix=
+}
+
+ccenv_set_os_dso_patterns_dlltool()
+{
+	ccenv_os_app_prefix=
+	ccenv_os_app_suffix=.exe
+
+	ccenv_os_lib_prefix=lib
+	ccenv_os_lib_suffix=.dll
+
+	ccenv_os_implib_ext=.dll.a
+	ccenv_os_libdef_ext=.def
+
+	ccenv_os_archive_ext=.a
+	ccenv_os_soname=copy
+
+	ccenv_os_lib_prefixed_suffix='$(OS_LIB_SUFFIX)'
+	ccenv_os_lib_suffixed_suffix=
+}
+
+ccenv_set_os_dso_patterns_default()
+{
+	ccenv_os_app_prefix=
+	ccenv_os_app_suffix=
+
+	ccenv_os_lib_prefix=lib
+	ccenv_os_lib_suffix=.so
+
+	ccenv_os_implib_ext=.invalid
+	ccenv_os_libdef_ext=.invalid
+
+	ccenv_os_archive_ext=.a
+	ccenv_os_soname=symlink
+
+	ccenv_os_lib_prefixed_suffix='$(OS_LIB_SUFFIX)'
+	ccenv_os_lib_suffixed_suffix=
+}
+
+ccenv_set_os_dso_patterns()
+{
+	# sover: .so.x.y.z
+	# verso: .x.y.z.so
+
+	case "$ccenv_os" in
+		darwin )
+			ccenv_set_os_dso_patterns_darwin
+			;;
+		midipix )
+			ccenv_set_os_dso_patterns_mdso
+			;;
+		cygwin | msys | mingw )
+			ccenv_set_os_dso_patterns_dlltool
+			;;
+		* )
+			ccenv_set_os_dso_patterns_default
+			;;
+	esac
+}
+
+ccenv_output_defs()
+{
+	ccenv_in="$mb_project_dir/sofort/ccenv/ccenv.in"
+	ccenv_mk="$mb_pwd/ccenv/$ccenv_cfgtype.mk"
+
+	if [ $ccenv_cfgtype = 'native' ]; then
+
+		ccenv_tmp=$(mktemp)
+
+		sed                             \
+				-e 's/^\s*$/@/g' \
+				-e 's/^/NATIVE_/' \
+				-e 's/NATIVE_@//g' \
+				-e 's/NATIVE_#/#/g' \
+				-e 's/       =/=/g'  \
+				-e 's/       +=/+=/g' \
+			"$ccenv_in" > "$ccenv_tmp"
+
+		ccenv_in="$ccenv_tmp"
+	fi
+
+	ccenv_vars=$(cut -d'=' -f1 "$mb_project_dir/sofort/ccenv/ccenv.vars" \
+			| grep -v '^#')
+
+	ccenv_exvars="ccenv_cfgtype ccenv_makevar_prefix"
+
+	ccenv_sed_substs=" \
+		$(for __var in $ccenv_vars $ccenv_exvars; do \
+			printf '%s"$%s"%s' "-e 's/@$__var@/'" \
+				"$__var" "'/g' ";              \
+		done)"
+
+	eval sed $ccenv_sed_substs "$ccenv_in" \
+			| sed -e 's/[ \t]*$//g' \
+		> "$ccenv_mk"
+
+	return 0
+}
+
+ccenv_clean_up()
+{
+	rm -f $ccenv_image
+}
+
+ccenv_common_init()
+{
+	. "$mb_project_dir/sofort/ccenv/ccenv.vars"
+
+	ccenv_cfgtype=$1
+	ccenv_cfgfile="$mb_pwd/ccenv/$ccenv_cfgtype.mk"
+	ccenv_freestd=
+
+	if [ $ccenv_cfgtype = 'native' ]; then
+		ccenv_makevar_prefix='NATIVE_'
+		ccenv_image='./ccenv/native.a.out'
+	else
+		ccenv_makevar_prefix=
+		ccenv_image='./ccenv/host.a.out'
+	fi
+
+	if [ $ccenv_cfgtype = 'native' ]; then
+		ccenv_prefixes=
+	elif [ -n "$mb_cross_compile" ]; then
+		ccenv_prefixes="$mb_cross_compile"
+	elif [ -n "$mb_host" ]; then
+		ccenv_prefixes="$mb_host-"
+	else
+		ccenv_prefixes=
+	fi
+
+	if [ $ccenv_cfgtype = 'host' ]; then
+		ccenv_tflags=
+		ccenv_cflags=$(make -s -f "$mb_pwd/Makefile.tmp" .display-cflags)
+		ccenv_cc="$mb_user_cc"
+		ccenv_cpp="$mb_user_cpp"
+		ccenv_cxx="$mb_user_cxx"
+	else
+		ccenv_tflags=
+		ccenv_cflags="$mb_native_cflags"
+		ccenv_cc="$mb_native_cc"
+		ccenv_cpp="$mb_native_cpp"
+		ccenv_cxx="$mb_native_cxx"
+	fi
+}
+
+ccenv_set_characteristics()
+{
+	ccenv_set_cc_host
+	ccenv_set_cc_bits
+	ccenv_set_cc_underscore
+	ccenv_set_cc_binfmt
+}
+
+ccenv_set_toolchain_variables()
+{
+	ccenv_common_init $1
+	ccenv_set_cc
+	ccenv_set_cpp
+	ccenv_set_cxx
+	ccenv_set_primary_tools
+	ccenv_set_tool_variants
+	ccenv_set_characteristics
+
+	ccenv_set_os
+	ccenv_set_os_flags
+	ccenv_set_os_semantics
+	ccenv_set_os_dso_exrules
+	ccenv_set_os_dso_linkage
+	ccenv_set_os_dso_patterns
+
+	ccenv_output_defs
+	ccenv_clean_up
+}
+
+ccenv_set_host_variables()
+{
+	ccenv_set_toolchain_variables 'host'
+}
+
+ccenv_set_native_variables()
+{
+	ccenv_set_toolchain_variables 'native'
+}
diff --git a/sofort/ccenv/ccenv.usage b/sofort/ccenv/ccenv.usage
new file mode 100644
index 0000000..44e5f05
--- /dev/null
+++ b/sofort/ccenv/ccenv.usage
@@ -0,0 +1,84 @@
+A few words on sofort's tool-finding logic
+==========================================
+
+# the goals of sofort's tool-finding logic are:
+- follow a clear, transparent, and consistent logic
+- allow users to easily specify per-build preferences
+- allow distros to easily and cleanly use site-wide settings
+
+
+# three-way terminology:
+- native machine: where make(1) will be running.
+- host machine:   where the package's program or libraries will execute.
+- target machine: where code generated by the host package will execute.
+
+! NOTE, however, that the host/target distinction is only relevant
+  when building a code-generating utility (e.g. a compiler), and that
+  the two are otherwise rather synonymous. Moreover, in practice it
+  is much more common to see configure scripts being invoked with a
+  --target=<machine> argument specifying the host, than with a
+  --host=<machine> argument.
+
+
+# invocation and names of binary tools:
+- agnostic names (ar, nm, objdump, ...)
+- branded names (llvm-ar, llvm-nm, llvm-objdump, ...)
+- machine-prefixed agnostic names (x86_64-nt64-midipix-ar, ...)
+- machine-prefixed branded names (x86_64-linux-gnu-gcc-ar, ...)
+- machine-specifying branded tools, as in
+  llvm-ar --target=x86_64-linux.
+
+
+# cross-compilation: default search order:
+- machine-prefixed agnostic tools
+- machine-prefixed branded tools, starting with the prefix
+  most commonly associated with the selected compiler (that is,
+  ``gcc'' when using gcc, and ``llvm'' when using clang)
+- (machine-specifying) agnostic tools
+- (machine-speficying) branded tools, starting once again with the
+  prefix most commonly associated with the selected compiler
+
+
+# native builds: default search order:
+- agnostic tools
+- machine-prefixed agnostic tools
+- machine-prefixed branded tools
+- branded tools
+
+
+# using an alternate search order:
+- --toolchain=<prefix> (e.g. --toolchain=llvm) --> search for tools
+  that begin with <prefix> before searching for agnostic tools
+
+
+# restricting which tools may be searched:
+- --zealous          --> only search for agnostic tools
+- --zealous=<prefix> --> only search for <prefix>-branded tools
+
+
+# per-tool overrides, by example of the ``ar'' tool:
+- AR=ar          --> set AR to $(command -v ar)
+- AR=/path/to/ar --> set AR to the specified absolute path
+
+
+# consistency:
+- in the above case of AR=ar, using $(command -v ar) ensures
+  that the same tool is used throughout the lifetime of the
+  build project.
+
+
+# host generated config file and variable names:
+- ccenv/host.mk
+- AR, NM, OBJDUMP, ...
+
+
+# native generated config file and variable names:
+- ccenv/native.mk
+- NATIVE_AR, NATIVE_NM, NATIVE_OBJDUMP, ...
+
+
+# distro: site-wide preferences
+- --ccenv=/path/to/site-specific/ccenv
+- use the above to create ccenv as a symlink to
+  /path/to/site-specific/ccenv, and to accordingly
+  skip configure's tool-finding step.
diff --git a/sofort/ccenv/ccenv.vars b/sofort/ccenv/ccenv.vars
new file mode 100644
index 0000000..1d68357
--- /dev/null
+++ b/sofort/ccenv/ccenv.vars
@@ -0,0 +1,82 @@
+# system flavor
+ccenv_os=
+ccenv_os_semantics=
+
+ccenv_os_dso_exrules=
+ccenv_os_dso_linkage=
+
+ccenv_os_app_prefix=
+ccenv_os_app_suffix=
+
+ccenv_os_lib_prefix=
+ccenv_os_lib_suffix=
+
+ccenv_os_implib_ext=
+ccenv_os_libdef_ext=
+
+ccenv_os_archive_ext=
+ccenv_os_soname=
+
+ccenv_os_lib_prefixed_suffix=
+ccenv_os_lib_suffixed_suffix=
+
+# characteristics
+ccenv_cc_host=
+ccenv_cc_bits=
+
+ccenv_cc_binfmt=
+ccenv_cc_underscore=
+
+ccenv_cc_arch_bfd=
+ccenv_cc_arch_llvm=
+
+# incompatible tool variants
+ccenv_as_asm=
+ccenv_as_ll=
+ccenv_as_mc=
+
+ccenv_ld_bfd=
+ccenv_ld_gold=
+ccenv_ld_lld=
+
+ccenv_objdump_bfd=
+ccenv_objdump_llvm=
+
+ccenv_readelf_bfd=
+ccenv_readelf_llvm=
+
+# tool variables
+ccenv_cc=
+ccenv_cpp=
+ccenv_cxx=
+
+ccenv_as=
+ccenv_ld=
+
+ccenv_ar=
+ccenv_nm=
+ccenv_objdump=
+ccenv_ranlib=
+ccenv_size=
+ccenv_strip=
+ccenv_strings=
+
+ccenv_addr2line=
+ccenv_cov=
+ccenv_cxxfilt=
+ccenv_objcopy=
+
+ccenv_elfedit=
+ccenv_readelf=
+ccenv_readobj=
+
+ccenv_perk=
+ccenv_mdso=
+ccenv_dlltool=
+
+ccenv_windmc=
+ccenv_windrc=
+
+# cflags
+ccenv_cflags_os=
+ccenv_cflags_pic=
diff --git a/sofort/cfgtest/cfgtest.sh b/sofort/cfgtest/cfgtest.sh
index b8821bb..d1e3b1b 100644
--- a/sofort/cfgtest/cfgtest.sh
+++ b/sofort/cfgtest/cfgtest.sh
@@ -45,7 +45,7 @@ cfgtest_target_section()
 cfgtest_native_section()
 {
 	mb_cfgtest_cc="$mb_native_cc"
-	mb_cfgtest_cflags="$mb_native_cc_cflags"
+	mb_cfgtest_cflags="$mb_native_cflags"
 	mb_cfgtest_cfgtype='native'
 
 	cfgtest_comment 'native system tests'
@@ -74,7 +74,7 @@ cfgtest_cflags_append()
 	if [ $mb_cfgtest_cfgtype = 'target' ]; then
 		mb_internal_makevar='CFLAGS_CONFIG'
 	else
-		mb_internal_makevar='NATIVE_CC_CFLAGS'
+		mb_internal_makevar='NATIVE_CFLAGS'
 	fi
 
 	mb_cfgtest_makevar_saved=$mb_cfgtest_makevar
@@ -90,7 +90,7 @@ cfgtest_ldflags_append()
 	if [ $mb_cfgtest_cfgtype = 'target' ]; then
 		mb_internal_makevar='LDFLAGS_CONFIG'
 	else
-		mb_internal_makevar='NATIVE_CC_LDFLAGS'
+		mb_internal_makevar='NATIVE_LDFLAGS'
 	fi
 
 	mb_cfgtest_makevar_saved=$mb_cfgtest_makevar
diff --git a/sofort/config.vars b/sofort/config.vars
index c4b3358..ac7c2aa 100644
--- a/sofort/config.vars
+++ b/sofort/config.vars
@@ -23,6 +23,7 @@ target
 arch
 compiler
 toolchain
+zealous
 sysroot
 cross_compile
 shell
@@ -94,14 +95,13 @@ elf_hash_style
 elf_config_defs
 
 native_cc
-native_cc_host
-native_cc_cfghost
-native_cc_cflags
-native_cc_ldflags
+native_cpp
+native_cxx
 
-native_os
-native_os_bits
-native_os_underscore
+native_host
+native_cfghost
+native_cflags
+native_ldflags
 
 all_shared
 all_static
diff --git a/sofort/exrules/default.mk b/sofort/exrules/default.mk
new file mode 100644
index 0000000..ad1c11c
--- /dev/null
+++ b/sofort/exrules/default.mk
@@ -0,0 +1,8 @@
+DSO_REF_VER      = $(SHARED_LIB)
+DSO_REF_SONAME   = $(SHARED_SONAME)
+DSO_REF_SOLINK   = $(SHARED_SOLINK)
+
+LDFLAGS_SHARED  += -Wl,-soname
+LDFLAGS_SHARED  += -Wl,$(DSO_SONAME)
+
+.PHONY:         $(IMPLIB_DEF) $(IMPLIB_VER) $(IMPLIB_SONAME) $(IMPLIB_SOLINK)
diff --git a/sofort/exrules/pe-common.mk b/sofort/exrules/pe-common.mk
new file mode 100644
index 0000000..be19ab3
--- /dev/null
+++ b/sofort/exrules/pe-common.mk
@@ -0,0 +1,39 @@
+DSO_REF_VER      = $(IMPLIB_VER)
+DSO_REF_SONAME   = $(IMPLIB_SONAME)
+DSO_REF_SOLINK   = $(IMPLIB_SOLINK)
+
+LDFLAGS_IMPLIB	+= -Wl,--output-def
+LDFLAGS_IMPLIB	+= -Wl,$(IMPLIB_DEF)
+
+LDFLAGS_SONAME	+= -Wl,-soname
+LDFLAGS_SONAME	+= -Wl,$(DSO_SONAME)
+LDFLAGS_SHARED	+= $(LDFLAGS_SONAME)
+
+DSO_LIBPATH	?= loader
+PE_SUBSYSTEM	?= windows
+LDFLAGS_COMMON	+= -Wl,--subsystem=$(PE_SUBSYSTEM)
+
+implib:			implib-ver package-implib-soname package-implib-solink
+
+implib-ver:		shared-lib $(IMPLIB_VER)
+
+implib-soname:		shared-lib $(IMPLIB_SONAME)
+
+implib-solink:		shared-lib $(IMPLIB_SOLINK)
+
+$(IMPLIB_DEF):		shared-lib
+
+install-implib:		install-implib-ver \
+			package-install-implib-soname \
+			package-install-implib-solink
+
+install-implib-ver:	implib-ver
+			mkdir -p $(DESTDIR)$(LIBDIR)
+			cp $(IMPLIB_VER) $(DESTDIR)$(LIBDIR)
+
+clean-implib:
+			rm -f $(SHARED_LIB)
+			rm -f $(IMPLIB_DEF)
+			rm -f $(IMPLIB_VER)
+			rm -f $(IMPLIB_SONAME)
+			rm -f $(IMPLIB_SOLINK)
diff --git a/sofort/exrules/pe-dlltool.mk b/sofort/exrules/pe-dlltool.mk
new file mode 100644
index 0000000..6694ed5
--- /dev/null
+++ b/sofort/exrules/pe-dlltool.mk
@@ -0,0 +1,15 @@
+include $(PROJECT_DIR)/sofort/exrules/pe-common.mk
+
+$(IMPLIB_VER):		$(IMPLIB_DEF)
+			$(DLLTOOL) -l $(IMPLIB_VER) -d $(IMPLIB_DEF) -D $(DSO_VER)
+
+ifeq ($(AVOID_VERSION),yes)
+
+else
+
+$(IMPLIB_SONAME):	$(IMPLIB_DEF)
+			$(DLLTOOL) -l $(IMPLIB_SONAME) -d $(IMPLIB_DEF) -D $(DSO_SONAME)
+
+endif
+
+include $(PROJECT_DIR)/sofort/exrules/pe-version.mk
diff --git a/sofort/exrules/pe-mdso.mk b/sofort/exrules/pe-mdso.mk
new file mode 100644
index 0000000..b5e2dba
--- /dev/null
+++ b/sofort/exrules/pe-mdso.mk
@@ -0,0 +1,15 @@
+include $(PROJECT_DIR)/sofort/exrules/pe-common.mk
+
+$(IMPLIB_VER):		$(IMPLIB_DEF)
+			$(MDSO) -m $(CC_BITS) -i $(IMPLIB_VER) -n $(DSO_VER) -l $(DSO_LIBPATH) $<
+
+ifeq ($(AVOID_VERSION),yes)
+
+else
+
+$(IMPLIB_SONAME):	$(IMPLIB_DEF)
+			$(MDSO) -m $(CC_BITS) -i $(IMPLIB_SONAME) -n $(DSO_SONAME) $(IMPLIB_DEF)
+
+endif
+
+include $(PROJECT_DIR)/sofort/exrules/pe-version.mk
diff --git a/sofort/exrules/pe-version.mk b/sofort/exrules/pe-version.mk
new file mode 100644
index 0000000..38714b4
--- /dev/null
+++ b/sofort/exrules/pe-version.mk
@@ -0,0 +1,31 @@
+ifeq ($(AVOID_VERSION),yes)
+
+package-implib-soname:
+package-implib-solink:
+package-install-implib-soname:
+package-install-implib-solink:
+
+else
+
+package-implib-soname:		implib-soname
+package-implib-solink:		implib-solink
+package-install-implib-soname:	install-implib-soname
+package-install-implib-solink:	install-implib-solink
+
+
+$(IMPLIB_SOLINK):	$(IMPLIB_SONAME)
+			rm -f $(IMPLIB_SOLINK).tmp
+			ln -s $(IMP_SONAME) $(IMPLIB_SOLINK).tmp
+			mv $(IMPLIB_SOLINK).tmp $(IMPLIB_SOLINK)
+
+install-implib-soname:	implib-soname
+			mkdir -p $(DESTDIR)$(LIBDIR)
+			cp $(IMPLIB_SONAME) $(DESTDIR)$(LIBDIR)
+
+install-implib-solink:	implib-soname
+			mkdir -p $(DESTDIR)$(LIBDIR)
+			rm -f $(IMPLIB_SOLINK).tmp
+			ln -s $(IMP_SONAME) $(IMPLIB_SOLINK).tmp
+			mv $(IMPLIB_SOLINK).tmp $(DESTDIR)$(LIBDIR)/$(IMP_SOLINK)
+
+endif
diff --git a/sofort/flag.vars b/sofort/flag.vars
index 798096b..4229e3e 100644
--- a/sofort/flag.vars
+++ b/sofort/flag.vars
@@ -14,6 +14,9 @@ mb_exec_prefix_set
 
 mb_bindir_basename
 
+# ccenv
+mb_agnostic
+
 # cfgtest
 mb_cfgtest_cc
 mb_cfgtest_cflags
diff --git a/sofort/flavor.mk b/sofort/flavor.mk
index 8e0bbc4..bd9ab06 100644
--- a/sofort/flavor.mk
+++ b/sofort/flavor.mk
@@ -1,13 +1,7 @@
-ifeq ($(OS_BINFMT),PE)
-include $(PROJECT_DIR)/sysinfo/os/pe.mk
+ifneq ($(OS_DSO_EXRULES),)
+include $(PROJECT_DIR)/sofort/exrules/$(OS_DSO_EXRULES).mk
 endif
 
-ifeq ($(OS_BINFMT),ELF)
-include $(PROJECT_DIR)/sysinfo/os/elf.mk
-endif
-
-
-
 ifeq ($(DISABLE_STATIC),yes)
 package-static:
 package-install-static:
diff --git a/sysinfo/version.sh b/sofort/version.sh
index f510a32..f510a32 100755
--- a/sysinfo/version.sh
+++ b/sofort/version.sh
diff --git a/sysinfo/compiler/any-compiler.mk b/sysinfo/compiler/any-compiler.mk
deleted file mode 100644
index 4c98621..0000000
--- a/sysinfo/compiler/any-compiler.mk
+++ /dev/null
@@ -1,29 +0,0 @@
-ifeq ($(CROSS_COMPILE)x,x)
-	CROSS_HOST	=
-	CROSS_HOST_SPEC =
-else
-	CROSS_HOST	=
-	CROSS_HOST_SPEC =
-endif
-
-
-ifeq ($(USER_CC)x,x)
-	CC	= $(NATIVE_CC) $(CROSS_HOST_SPEC)
-else
-	CC	= $(USER_CC) $(CROSS_HOST_SPEC)
-endif
-
-ifeq ($(USER_CPP)x,x)
-	CPP	= $(NATIVE_CC) $(CROSS_HOST_SPEC) -E
-else
-	CPP	= $(USER_CPP) $(CROSS_HOST_SPEC) -E
-endif
-
-ifeq ($(USER_CXX)x,x)
-	CXX	= $(NATIVE_CC) $(CROSS_HOST_SPEC) -std=c++
-else
-	CXX	= $(USER_CXX) $(CROSS_HOST_SPEC) -std=c++
-endif
-
-
-CFLAGS_PIC	= -fPIC
diff --git a/sysinfo/compiler/clang.mk b/sysinfo/compiler/clang.mk
deleted file mode 100644
index 77b4b86..0000000
--- a/sysinfo/compiler/clang.mk
+++ /dev/null
@@ -1,31 +0,0 @@
-ifeq ($(CROSS_COMPILE)x,x)
-	CROSS_HOST	=
-	CROSS_HOST_SPEC =
-else ifeq ($(CROSS_HOST)x,x)
-	CROSS_HOST	= $(HOST)
-	CROSS_HOST_SPEC = --target=$(HOST)
-else
-	CROSS_HOST_SPEC = --target=$(CROSS_HOST)
-endif
-
-
-ifeq ($(USER_CC)x,x)
-	CC	= $(NATIVE_CC) $(CROSS_HOST_SPEC)
-else
-	CC	= $(USER_CC) $(CROSS_HOST_SPEC)
-endif
-
-ifeq ($(USER_CPP)x,x)
-	CPP	= $(NATIVE_CC) $(CROSS_HOST_SPEC) -E
-else
-	CPP	= $(USER_CPP) $(CROSS_HOST_SPEC) -E
-endif
-
-ifeq ($(USER_CXX)x,x)
-	CXX	= $(NATIVE_CC)++ $(CROSS_HOST_SPEC)
-else
-	CXX	= $(USER_CXX) $(CROSS_HOST_SPEC)
-endif
-
-
-CFLAGS_PIC	= -fPIC
diff --git a/sysinfo/compiler/cparser.mk b/sysinfo/compiler/cparser.mk
deleted file mode 100644
index 6c4dc8e..0000000
--- a/sysinfo/compiler/cparser.mk
+++ /dev/null
@@ -1,31 +0,0 @@
-ifeq ($(CROSS_COMPILE)x,x)
-	CROSS_HOST	=
-	CROSS_HOST_SPEC =
-else ifeq ($(CROSS_HOST)x,x)
-	CROSS_HOST	= $(HOST)
-	CROSS_HOST_SPEC = --target=$(HOST)
-else
-	CROSS_HOST_SPEC = --target=$(CROSS_HOST)
-endif
-
-
-ifeq ($(USER_CC)x,x)
-	CC	= $(NATIVE_CC) $(CROSS_HOST_SPEC) -Wno-experimental -integrated-cpp
-else
-	CC	= $(USER_CC) $(CROSS_HOST_SPEC) -Wno-experimental -integrated-cpp
-endif
-
-ifeq ($(USER_CPP)x,x)
-	CPP	= $(NATIVE_CC) $(CROSS_HOST_SPEC) -Wno-experimental -integrated-cpp -E
-else
-	CPP	= $(USER_CPP) $(CROSS_HOST_SPEC) -Wno-experimental -integrated-cpp -E
-endif
-
-ifeq ($(USER_CXX)x,x)
-	CXX	= $(NATIVE_CC) $(CROSS_HOST_SPEC) -Wno-experimental -integrated-cpp -std=c++
-else
-	CXX	= $(USER_CXX) $(CROSS_HOST_SPEC) -Wno-experimental -integrated-cpp -std=c++
-endif
-
-
-CFLAGS_PIC	= -fPIC
diff --git a/sysinfo/compiler/gcc.mk b/sysinfo/compiler/gcc.mk
deleted file mode 100644
index d14d8dc..0000000
--- a/sysinfo/compiler/gcc.mk
+++ /dev/null
@@ -1,24 +0,0 @@
-ifeq ($(USER_CC)x,x)
-	ifeq ($(CROSS_COMPILE)x,x)
-		CC = $(CROSS_COMPILE)$(NATIVE_CC)
-	else
-		CC = $(CROSS_COMPILE)gcc
-	endif
-else
-	CC	= $(USER_CC)
-endif
-
-ifeq ($(USER_CPP)x,x)
-	CPP	= $(CROSS_COMPILE)cpp
-else
-	CPP	= $(USER_CPP)
-endif
-
-ifeq ($(USER_CXX)x,x)
-	CXX	= $(CROSS_COMPILE)c++
-else
-	CXX	= $(USER_CXX)
-endif
-
-
-CFLAGS_PIC	= -fPIC
diff --git a/sysinfo/host/any-host.mk b/sysinfo/host/any-host.mk
deleted file mode 100644
index acb606a..0000000
--- a/sysinfo/host/any-host.mk
+++ /dev/null
@@ -1,7 +0,0 @@
-include $(PROJECT_DIR)/sysinfo/os/any-os.mk
-
-ARCH		=
-HOST_BITS	=
-HOST_UNDERSCORE =
-
-CROSS_HOST	= $(TARGET)
diff --git a/sysinfo/host/i686-nt32-midipix.mk b/sysinfo/host/i686-nt32-midipix.mk
deleted file mode 100644
index fd4b8f8..0000000
--- a/sysinfo/host/i686-nt32-midipix.mk
+++ /dev/null
@@ -1,5 +0,0 @@
-include $(PROJECT_DIR)/sysinfo/os/midipix.mk
-
-ARCH		= nt32
-HOST_BITS	= 32
-HOST_UNDERSCORE = '_'
diff --git a/sysinfo/host/i686-unknown-linux.mk b/sysinfo/host/i686-unknown-linux.mk
deleted file mode 100644
index bec437c..0000000
--- a/sysinfo/host/i686-unknown-linux.mk
+++ /dev/null
@@ -1,5 +0,0 @@
-include $(PROJECT_DIR)/sysinfo/os/linux.mk
-
-ARCH		= i386
-HOST_BITS	= 32
-HOST_UNDERSCORE = '_'
diff --git a/sysinfo/host/i686-w64-mingw32.mk b/sysinfo/host/i686-w64-mingw32.mk
deleted file mode 100644
index b18e2e3..0000000
--- a/sysinfo/host/i686-w64-mingw32.mk
+++ /dev/null
@@ -1,5 +0,0 @@
-include $(PROJECT_DIR)/sysinfo/os/mingw.mk
-
-ARCH		= w32
-HOST_BITS	= 32
-HOST_UNDERSCORE = '_'
diff --git a/sysinfo/host/native.mk b/sysinfo/host/native.mk
deleted file mode 100644
index f0cf720..0000000
--- a/sysinfo/host/native.mk
+++ /dev/null
@@ -1,45 +0,0 @@
-include $(PROJECT_DIR)/sysinfo/os/$(NATIVE_OS).mk
-
-OS		= $(NATIVE_OS)
-HOST_BITS	= $(NATIVE_OS_BITS)
-HOST_UNDERSCORE = $(NATIVE_OS_UNDERSCORE)
-
-ifeq ($(OS),linux)
-	ifeq ($(HOST_BITS),32)
-		ARCH = i386
-	else ifeq ($(HOST_BITS),64)
-		ARCH = x86_64
-	endif
-endif
-
-ifeq ($(OS),midipix)
-	ifeq ($(HOST_BITS),32)
-		ARCH = nt32
-	else ifeq ($(HOST_BITS),64)
-		ARCH = nt64
-	endif
-endif
-
-ifeq ($(OS),mingw)
-	ifeq ($(HOST_BITS),32)
-		ARCH = w32
-	else ifeq ($(HOST_BITS),64)
-		ARCH = w64
-	endif
-endif
-
-ifeq ($(OS),bsd)
-	ifeq ($(HOST_BITS),32)
-		ARCH = bsd32
-	else ifeq ($(HOST_BITS),64)
-		ARCH = bsd64
-	endif
-endif
-
-ifeq ($(OS),darwin)
-	ifeq ($(HOST_BITS),32)
-		ARCH = dw32
-	else ifeq ($(HOST_BITS),64)
-		ARCH = dw64
-	endif
-endif
diff --git a/sysinfo/host/x86_64-nt64-midipix.mk b/sysinfo/host/x86_64-nt64-midipix.mk
deleted file mode 100644
index d0e1d52..0000000
--- a/sysinfo/host/x86_64-nt64-midipix.mk
+++ /dev/null
@@ -1,5 +0,0 @@
-include $(PROJECT_DIR)/sysinfo/os/midipix.mk
-
-ARCH		= nt64
-HOST_BITS	= 64
-HOST_UNDERSCORE = ''
diff --git a/sysinfo/host/x86_64-unknown-linux.mk b/sysinfo/host/x86_64-unknown-linux.mk
deleted file mode 100644
index 4bd1bff..0000000
--- a/sysinfo/host/x86_64-unknown-linux.mk
+++ /dev/null
@@ -1,5 +0,0 @@
-include $(PROJECT_DIR)/sysinfo/os/linux.mk
-
-ARCH		= x86_64
-HOST_BITS	= 64
-HOST_UNDERSCORE = ''
diff --git a/sysinfo/host/x86_64-w64-mingw32.mk b/sysinfo/host/x86_64-w64-mingw32.mk
deleted file mode 100644
index a86f9b0..0000000
--- a/sysinfo/host/x86_64-w64-mingw32.mk
+++ /dev/null
@@ -1,5 +0,0 @@
-include $(PROJECT_DIR)/sysinfo/os/mingw.mk
-
-ARCH		= w64
-HOST_BITS	= 64
-HOST_UNDERSCORE = ''
diff --git a/sysinfo/os/any-os.mk b/sysinfo/os/any-os.mk
deleted file mode 100644
index 6c5a2af..0000000
--- a/sysinfo/os/any-os.mk
+++ /dev/null
@@ -1,16 +0,0 @@
-OS		= any-os
-OS_APP_PREFIX	=
-OS_APP_SUFFIX	=
-OS_LIB_PREFIX	= lib
-OS_LIB_SUFFIX	= .so
-OS_IMPLIB_EXT	= .invalid
-OS_LIBDEF_EXT	= .invalid
-OS_ARCHIVE_EXT	= .a
-OS_SONAME	= symlink
-OS_BINFMT	= ELF
-
-.PHONY:		$(IMPLIB_DEF) $(IMPLIB_VER) $(IMPLIB_SONAME) $(IMPLIB_SOLINK)
-
-# dso suffix notation
-OS_LIB_PREFIXED_SUFFIX  = $(OS_LIB_SUFFIX)
-OS_LIB_SUFFIXED_SUFFIX  =
diff --git a/sysinfo/os/bsd.mk b/sysinfo/os/bsd.mk
deleted file mode 100644
index 67453da..0000000
--- a/sysinfo/os/bsd.mk
+++ /dev/null
@@ -1,14 +0,0 @@
-OS		= bsd
-OS_APP_PREFIX	=
-OS_APP_SUFFIX	=
-OS_LIB_PREFIX	= lib
-OS_LIB_SUFFIX	= .so
-OS_IMPLIB_EXT	= .invalid
-OS_LIBDEF_EXT	= .invalid
-OS_ARCHIVE_EXT	= .a
-OS_SONAME	= symlink
-OS_BINFMT	= ELF
-
-# dso suffix notation
-OS_LIB_PREFIXED_SUFFIX  = $(OS_LIB_SUFFIX)
-OS_LIB_SUFFIXED_SUFFIX  =
diff --git a/sysinfo/os/cygwin.mk b/sysinfo/os/cygwin.mk
deleted file mode 100644
index 290aa0d..0000000
--- a/sysinfo/os/cygwin.mk
+++ /dev/null
@@ -1,17 +0,0 @@
-OS		= cygwin
-OS_APP_PREFIX	=
-OS_APP_SUFFIX	= .exe
-OS_LIB_PREFIX	= lib
-OS_LIB_SUFFIX	= .dll
-OS_IMPLIB_EXT	= .dll.a
-OS_LIBDEF_EXT	= .def
-OS_ARCHIVE_EXT	= .a
-OS_SONAME	= copy
-OS_BINFMT	= PE
-OS_IMPLIB_TOOL	= dlltool
-
-CFLAGS_PIC	=
-
-# dso suffix notation
-OS_LIB_PREFIXED_SUFFIX  = $(OS_LIB_SUFFIX)
-OS_LIB_SUFFIXED_SUFFIX  =
diff --git a/sysinfo/os/darwin.mk b/sysinfo/os/darwin.mk
deleted file mode 100644
index abc9bc7..0000000
--- a/sysinfo/os/darwin.mk
+++ /dev/null
@@ -1,18 +0,0 @@
-OS		= darwin
-OS_APP_PREFIX	=
-OS_APP_SUFFIX	=
-OS_LIB_PREFIX	= lib
-OS_LIB_SUFFIX	= .dylib
-OS_IMPLIB_EXT	= .invalid
-OS_LIBDEF_EXT	= .invalid
-OS_ARCHIVE_EXT	= .a
-OS_SONAME	= symlink
-OS_BINFMT	= MACHO
-
-CFLAGS_OS	+= -D_DARWIN_C_SOURCE
-
-.PHONY:		$(IMPLIB_DEF) $(IMPLIB_VER) $(IMPLIB_SONAME) $(IMPLIB_SOLINK)
-
-# dso suffix notation
-OS_LIB_PREFIXED_SUFFIX  =
-OS_LIB_SUFFIXED_SUFFIX  = $(OS_LIB_SUFFIX)
diff --git a/sysinfo/os/elf.mk b/sysinfo/os/elf.mk
deleted file mode 100644
index 6878c6a..0000000
--- a/sysinfo/os/elf.mk
+++ /dev/null
@@ -1,6 +0,0 @@
-DSO_REF_VER      = $(SHARED_LIB)
-DSO_REF_SONAME   = $(SHARED_SONAME)
-DSO_REF_SOLINK   = $(SHARED_SOLINK)
-
-LDFLAGS_SHARED	+= -Wl,-soname
-LDFLAGS_SHARED	+= -Wl,$(DSO_SONAME)
diff --git a/sysinfo/os/linux.mk b/sysinfo/os/linux.mk
deleted file mode 100644
index b9a5f5c..0000000
--- a/sysinfo/os/linux.mk
+++ /dev/null
@@ -1,14 +0,0 @@
-OS		= linux
-OS_APP_PREFIX	=
-OS_APP_SUFFIX	=
-OS_LIB_PREFIX	= lib
-OS_LIB_SUFFIX	= .so
-OS_IMPLIB_EXT	= .invalid
-OS_LIBDEF_EXT	= .invalid
-OS_ARCHIVE_EXT	= .a
-OS_SONAME	= symlink
-OS_BINFMT	= ELF
-
-# dso suffix notation
-OS_LIB_PREFIXED_SUFFIX  = $(OS_LIB_SUFFIX)
-OS_LIB_SUFFIXED_SUFFIX  =
diff --git a/sysinfo/os/midipix.mk b/sysinfo/os/midipix.mk
deleted file mode 100644
index d23d387..0000000
--- a/sysinfo/os/midipix.mk
+++ /dev/null
@@ -1,15 +0,0 @@
-OS		= midipix
-OS_APP_PREFIX	=
-OS_APP_SUFFIX	=
-OS_LIB_PREFIX	= lib
-OS_LIB_SUFFIX	= .so
-OS_IMPLIB_EXT	= .lib.a
-OS_LIBDEF_EXT	= .so.def
-OS_ARCHIVE_EXT	= .a
-OS_SONAME	= symlink
-OS_BINFMT	= PE
-OS_IMPLIB_TOOL	= mdso
-
-# dso suffix notation
-OS_LIB_PREFIXED_SUFFIX  = $(OS_LIB_SUFFIX)
-OS_LIB_SUFFIXED_SUFFIX  =
diff --git a/sysinfo/os/mingw.mk b/sysinfo/os/mingw.mk
deleted file mode 100644
index 1a352ba..0000000
--- a/sysinfo/os/mingw.mk
+++ /dev/null
@@ -1,18 +0,0 @@
-OS		= mingw
-OS_APP_PREFIX	=
-OS_APP_SUFFIX	= .exe
-OS_LIB_PREFIX	= lib
-OS_LIB_SUFFIX	= .dll
-OS_IMPLIB_EXT	= .dll.a
-OS_LIBDEF_EXT	= .def
-OS_ARCHIVE_EXT	= .a
-OS_SONAME	= copy
-OS_BINFMT	= PE
-OS_IMPLIB_TOOL	= dlltool
-
-CFLAGS_PIC	=
-CFLAGS_OS      += -U__STRICT_ANSI__
-
-# dso suffix notation
-OS_LIB_PREFIXED_SUFFIX  = $(OS_LIB_SUFFIX)
-OS_LIB_SUFFIXED_SUFFIX  =
diff --git a/sysinfo/os/mingw32.mk b/sysinfo/os/mingw32.mk
deleted file mode 100644
index 542b6a9..0000000
--- a/sysinfo/os/mingw32.mk
+++ /dev/null
@@ -1 +0,0 @@
-include $(PROJECT_DIR)/sysinfo/os/mingw.mk
diff --git a/sysinfo/os/mingw64.mk b/sysinfo/os/mingw64.mk
deleted file mode 100644
index 542b6a9..0000000
--- a/sysinfo/os/mingw64.mk
+++ /dev/null
@@ -1 +0,0 @@
-include $(PROJECT_DIR)/sysinfo/os/mingw.mk
diff --git a/sysinfo/os/msys.mk b/sysinfo/os/msys.mk
deleted file mode 100644
index 70fcd68..0000000
--- a/sysinfo/os/msys.mk
+++ /dev/null
@@ -1,18 +0,0 @@
-OS		= msys
-OS_APP_PREFIX	=
-OS_APP_SUFFIX	= .exe
-OS_LIB_PREFIX	= lib
-OS_LIB_SUFFIX	= .dll
-OS_IMPLIB_EXT	= .dll.a
-OS_LIBDEF_EXT	= .def
-OS_ARCHIVE_EXT	= .a
-OS_SONAME	= copy
-OS_BINFMT	= PE
-OS_IMPLIB_TOOL	= dlltool
-
-CFLAGS_PIC	=
-CFLAGS_OS      += -U__STRICT_ANSI__
-
-# dso suffix notation
-OS_LIB_PREFIXED_SUFFIX  = $(OS_LIB_SUFFIX)
-OS_LIB_SUFFIXED_SUFFIX  =
diff --git a/sysinfo/os/pe.mk b/sysinfo/os/pe.mk
deleted file mode 100644
index 6f9e8ef..0000000
--- a/sysinfo/os/pe.mk
+++ /dev/null
@@ -1,99 +0,0 @@
-DSO_REF_VER      = $(IMPLIB_VER)
-DSO_REF_SONAME   = $(IMPLIB_SONAME)
-DSO_REF_SOLINK   = $(IMPLIB_SOLINK)
-
-LDFLAGS_IMPLIB	+= -Wl,--output-def
-LDFLAGS_IMPLIB	+= -Wl,$(IMPLIB_DEF)
-
-LDFLAGS_SONAME	+= -Wl,-soname
-LDFLAGS_SONAME	+= -Wl,$(DSO_SONAME)
-LDFLAGS_SHARED	+= $(LDFLAGS_SONAME)
-
-DSO_LIBPATH	?= loader
-PE_SUBSYSTEM	?= windows
-LDFLAGS_COMMON	+= -Wl,--subsystem=$(PE_SUBSYSTEM)
-
-implib:			implib-ver package-implib-soname package-implib-solink
-
-implib-ver:		shared-lib $(IMPLIB_VER)
-
-implib-soname:		shared-lib $(IMPLIB_SONAME)
-
-implib-solink:		shared-lib $(IMPLIB_SOLINK)
-
-$(IMPLIB_DEF):		shared-lib
-
-install-implib:		install-implib-ver \
-			package-install-implib-soname \
-			package-install-implib-solink
-
-install-implib-ver:	implib-ver
-			mkdir -p $(DESTDIR)$(LIBDIR)
-			cp $(IMPLIB_VER) $(DESTDIR)$(LIBDIR)
-
-clean-implib:
-			rm -f $(SHARED_LIB)
-			rm -f $(IMPLIB_DEF)
-			rm -f $(IMPLIB_VER)
-			rm -f $(IMPLIB_SONAME)
-			rm -f $(IMPLIB_SOLINK)
-
-
-ifeq ($(OS_IMPLIB_TOOL),mdso)
-
-$(IMPLIB_VER):		$(IMPLIB_DEF)
-			$(MDSO) -m $(HOST_BITS) -i $(IMPLIB_VER) -n $(DSO_VER) -l $(DSO_LIBPATH) $<
-
-else ifeq ($(OS_IMPLIB_TOOL),dlltool)
-
-$(IMPLIB_VER):		$(IMPLIB_DEF)
-			$(DLLTOOL) -l $(IMPLIB_VER) -d $(IMPLIB_DEF) -D $(DSO_VER)
-
-endif
-
-
-
-ifeq ($(AVOID_VERSION),yes)
-
-package-implib-soname:
-package-implib-solink:
-package-install-implib-soname:
-package-install-implib-solink:
-
-else
-
-package-implib-soname:		implib-soname
-package-implib-solink:		implib-solink
-package-install-implib-soname:	install-implib-soname
-package-install-implib-solink:	install-implib-solink
-
-
-ifeq ($(OS_IMPLIB_TOOL),mdso)
-
-$(IMPLIB_SONAME):	$(IMPLIB_DEF)
-			$(MDSO) -m $(HOST_BITS) -i $(IMPLIB_SONAME) -n $(DSO_SONAME) $(IMPLIB_DEF)
-
-else ifeq ($(OS_IMPLIB_TOOL),dlltool)
-
-$(IMPLIB_SONAME):	$(IMPLIB_DEF)
-			$(DLLTOOL) -l $(IMPLIB_SONAME) -d $(IMPLIB_DEF) -D $(DSO_SONAME)
-
-endif
-
-
-$(IMPLIB_SOLINK):	$(IMPLIB_SONAME)
-			rm -f $(IMPLIB_SOLINK).tmp
-			ln -s $(IMP_SONAME) $(IMPLIB_SOLINK).tmp
-			mv $(IMPLIB_SOLINK).tmp $(IMPLIB_SOLINK)
-
-install-implib-soname:	implib-soname
-			mkdir -p $(DESTDIR)$(LIBDIR)
-			cp $(IMPLIB_SONAME) $(DESTDIR)$(LIBDIR)
-
-install-implib-solink:	implib-soname
-			mkdir -p $(DESTDIR)$(LIBDIR)
-			rm -f $(IMPLIB_SOLINK).tmp
-			ln -s $(IMP_SONAME) $(IMPLIB_SOLINK).tmp
-			mv $(IMPLIB_SOLINK).tmp $(DESTDIR)$(LIBDIR)/$(IMP_SOLINK)
-
-endif
diff --git a/sysinfo/toolchain/binutils.mk b/sysinfo/toolchain/binutils.mk
deleted file mode 100644
index 9cb532a..0000000
--- a/sysinfo/toolchain/binutils.mk
+++ /dev/null
@@ -1,22 +0,0 @@
-AS		= $(CROSS_COMPILE)as
-AR		= $(CROSS_COMPILE)ar
-LD		= $(CROSS_COMPILE)ld
-NM		= $(CROSS_COMPILE)nm
-OBJDUMP		= $(CROSS_COMPILE)objdump
-RANLIB		= $(CROSS_COMPILE)ranlib
-SIZE		= $(CROSS_COMPILE)size
-STRIP		= $(CROSS_COMPILE)strip
-STRINGS		= $(CROSS_COMPILE)strings
-
-
-ADDR2LINE	= $(CROSS_COMPILE)addr2line
-COV		= $(CROSS_COMPILE)gcov
-CXXFILT		= $(CROSS_COMPILE)c++filt
-ELFEDIT		= $(CROSS_COMPILE)elfedit
-OBJCOPY		= $(CROSS_COMPILE)objcopy
-READELF		= $(CROSS_COMPILE)readelf
-DLLTOOL		= $(CROSS_COMPILE)dlltool
-MDSO		= $(CROSS_COMPILE)mdso
-PERK		= $(CROSS_COMPILE)perk
-MC		= $(CROSS_COMPILE)windmc
-RC		= $(CROSS_COMPILE)windres
diff --git a/sysinfo/toolchain/llvm.mk b/sysinfo/toolchain/llvm.mk
deleted file mode 100644
index 8082c0a..0000000
--- a/sysinfo/toolchain/llvm.mk
+++ /dev/null
@@ -1,22 +0,0 @@
-AS		= llvm-mc -filetype=obj
-AR		= llvm-ar
-LD		= lld
-NM		= llvm-nm
-OBJDUMP		= llvm-objdump
-RANLIB		= llvm-ranlib
-SIZE		= llvm-size
-STRIP		= $(CROSS_COMPILE)strip
-STRINGS		= $(CROSS_COMPILE)strings
-
-
-ADDR2LINE	= $(CROSS_COMPILE)addr2line
-COV		= $(CROSS_COMPILE)gcov
-CXXFILT		= $(CROSS_COMPILE)c++filt
-ELFEDIT		= $(CROSS_COMPILE)elfedit
-OBJCOPY		= $(CROSS_COMPILE)objcopy
-READELF		= $(CROSS_COMPILE)readelf
-DLLTOOL		= $(CROSS_COMPILE)dlltool
-MDSO		= $(CROSS_COMPILE)mdso
-PERK		= $(CROSS_COMPILE)perk
-MC		= $(CROSS_COMPILE)windmc
-RC		= $(CROSS_COMPILE)windres