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

4 files changed, 1272 insertions, 0 deletions

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=