From 5a916148f05272931f5b717074e9bb5ac60f20fc Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sat, 19 Mar 2016 16:23:27 -0400
Subject: driver: added -version-info support.

---
 include/slibtool/slibtool.h         |  8 +++++++
 src/driver/slbt_driver_ctx.c        | 44 +++++++++++++++++++++++++++++++++++++
 src/internal/slibtool_driver_impl.h |  1 +
 src/skin/slbt_skin_default.c        |  5 +++++
 4 files changed, 58 insertions(+)

diff --git a/include/slibtool/slibtool.h b/include/slibtool/slibtool.h
index 002a278..e64ec70 100644
--- a/include/slibtool/slibtool.h
+++ b/include/slibtool/slibtool.h
@@ -99,6 +99,13 @@ struct slbt_exec_ctx {
 	int	exitcode;
 };
 
+struct slbt_version_info {
+	int				major;
+	int				minor;
+	int				revision;
+	const char *			verinfo;
+};
+
 struct slbt_host_params {
 	const char *			host;
 	const char *			flavor;
@@ -113,6 +120,7 @@ struct slbt_common_ctx {
 	uint64_t			fmtflags;
 	struct slbt_host_params		host;
 	struct slbt_host_params		cfgmeta;
+	struct slbt_version_info	verinfo;
 	enum slbt_mode			mode;
 	enum slbt_tag			tag;
 	enum slbt_warning_level		warnings;
diff --git a/src/driver/slbt_driver_ctx.c b/src/driver/slbt_driver_ctx.c
index 10a531f..b9203c8 100644
--- a/src/driver/slbt_driver_ctx.c
+++ b/src/driver/slbt_driver_ctx.c
@@ -14,6 +14,7 @@
 #include "slibtool_driver_impl.h"
 #include "argv/argv.h"
 
+
 static const char cfgexplicit[] = "command-line argument";
 static const char cfghost[]     = "derived from <host>";
 static const char cfgtarget[]   = "derived from <target>";
@@ -220,6 +221,11 @@ static int slbt_split_argv(
 		} else if (!(strcmp("rpath",&argv[i][1]))) {
 			*targv++ = argv[i++];
 			*targv++ = argv[i];
+
+		} else if (!(strcmp("version-info",&argv[i][1]))) {
+			*targv++ = argv[i++];
+			*targv++ = argv[i];
+
 		} else {
 			for (option=options; option->long_name; option++)
 				if (!(strcmp(option->long_name,&argv[i][1])))
@@ -383,6 +389,33 @@ static int slbt_init_host_params(
 	return 0;
 }
 
+static int slbt_init_version_info(
+	struct slbt_driver_ctx_impl *	ictx,
+	struct slbt_version_info *	verinfo)
+{
+	int	current;
+	int	revision;
+	int	age;
+
+	sscanf(verinfo->verinfo,"%d:%d:%d",
+		&current,&revision,&age);
+
+	if (current < age) {
+		if (ictx->cctx.drvflags & SLBT_DRIVER_VERBOSITY_ERRORS)
+			fprintf(stderr,
+				"%s: error: invalid version info: "
+				"<current> may not be smaller than <age>.\n",
+				argv_program_name(ictx->cctx.targv[0]));
+		return -1;
+	}
+
+	verinfo->major    = current - age;
+	verinfo->minor    = age;
+	verinfo->revision = revision;
+
+	return 0;
+}
+
 int slbt_get_driver_ctx(
 	char **				argv,
 	char **				envp,
@@ -524,6 +557,10 @@ int slbt_get_driver_ctx(
 					cctx.rpath = entry->arg;
 					break;
 
+				case TAG_VERSION_INFO:
+					cctx.verinfo.verinfo = entry->arg;
+					break;
+
 				case TAG_TARGET:
 					cctx.target = entry->arg;
 					break;
@@ -573,6 +610,13 @@ int slbt_get_driver_ctx(
 			return -1;
 		}
 
+	/* version info */
+	if (ctx->cctx.verinfo.verinfo)
+		if (slbt_init_version_info(ctx,&ctx->cctx.verinfo)) {
+			slbt_free_driver_ctx(&ctx->ctx);
+			return -1;
+		}
+
 	*pctx = &ctx->ctx;
 	return SLBT_OK;
 }
diff --git a/src/internal/slibtool_driver_impl.h b/src/internal/slibtool_driver_impl.h
index 0ba0dfc..91bdc92 100644
--- a/src/internal/slibtool_driver_impl.h
+++ b/src/internal/slibtool_driver_impl.h
@@ -33,6 +33,7 @@ enum app_tags {
 	TAG_DLLTOOL,
 	TAG_OUTPUT,
 	TAG_RPATH,
+	TAG_VERSION_INFO,
 	TAG_NO_SUPPRESS,
 	TAG_PREFER_PIC,
 	TAG_PREFER_NON_PIC,
diff --git a/src/skin/slbt_skin_default.c b/src/skin/slbt_skin_default.c
index 926cc75..8339024 100644
--- a/src/skin/slbt_skin_default.c
+++ b/src/skin/slbt_skin_default.c
@@ -86,6 +86,11 @@ const struct argv_option slbt_default_options[] = {
 				"where a library should eventually be "
 				"installed, relative to $(DESTDIR)$(PREFIX)"},
 
+	{"version-info",	0,TAG_VERSION_INFO,ARGV_OPTARG_REQUIRED,
+				ARGV_OPTION_HYBRID_ONLY|ARGV_OPTION_HYBRID_SPACE,0,
+				"<current>[:<revision>[:<age>]]",
+				"specify version information"},
+
 	{"no-suppress",		0,TAG_NO_SUPPRESS,ARGV_OPTARG_NONE,
 				ARGV_OPTION_HYBRID_ONLY,0,0,
 				"transparently forward all "
-- 
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