From 1b12612023f99ddf8a71bb93c368440c8290adfe Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Mar 31 2024 03:10:25 +0000
Subject: slbt_output_config(): produce a backward compatible output with without lconf.


---

diff --git a/src/output/slbt_output_config.c b/src/output/slbt_output_config.c
index 5d52e44..0442884 100644
--- a/src/output/slbt_output_config.c
+++ b/src/output/slbt_output_config.c
@@ -13,8 +13,12 @@
 #include "slibtool_dprintf_impl.h"
 #include "slibtool_errinfo_impl.h"
 
+static const char enable[]  = "yes";
+static const char disable[] = "no";
+
 static const char lconf_begin[] = "# ### BEGIN LIBTOOL CONFIG\n";
 static const char lconf_end  [] = "# ### END LIBTOOL CONFIG\n";
+static const char lconf_guard[] = "# ### ##################\n";
 
 static int slbt_output_config_lconf(
 	const struct slbt_driver_ctx * dctx,
@@ -84,6 +88,89 @@ static int slbt_output_config_lconf(
 	return 0;
 }
 
+static int slbt_output_config_mkvars(const struct slbt_driver_ctx * dctx)
+{
+	int                                 fdout;
+	const char *                        shared_option;
+	const char *                        static_option;
+	const struct slbt_source_version *  verinfo;
+	const struct slbt_common_ctx *      cctx;
+
+	/* init */
+	fdout = slbt_driver_fdout(dctx);
+
+	shared_option = (dctx->cctx->drvflags & SLBT_DRIVER_DISABLE_SHARED)
+		? disable : enable;
+
+	static_option = (dctx->cctx->drvflags & SLBT_DRIVER_DISABLE_STATIC)
+		? disable : enable;
+
+	cctx = dctx->cctx;
+
+	/* header */
+	verinfo = slbt_api_source_version();
+
+	if (slbt_dprintf(
+			fdout,
+			"%s\n\n"
+			"%s\n"
+			"# %s\n"
+			"# Generated by %s (slibtool %d.%d.%d)\n"
+			"# [commit reference: %s]\n\n",
+			"#!/dev/null",
+			lconf_begin,
+			"Backward compatible build configuration",
+			dctx->program,
+			verinfo->major,verinfo->minor,verinfo->revision,
+			verinfo->commit) < 0)
+		return SLBT_SYSTEM_ERROR(dctx,0);
+
+	/* shared & static build options */
+	if (slbt_dprintf(fdout,"# shared libraries?\n" "build_libtool_libs=%s\n\n",shared_option) < 0)
+		return SLBT_SYSTEM_ERROR(dctx,0);
+
+	if (slbt_dprintf(fdout,"# static libraries?\n" "build_old_libs=%s\n\n",static_option) < 0)
+		return SLBT_SYSTEM_ERROR(dctx,0);
+
+	if (slbt_dprintf(fdout,"# host identification\n" "host=%s\n\n",cctx->host.host) < 0)
+		return SLBT_SYSTEM_ERROR(dctx,0);
+
+	if (slbt_dprintf(fdout,"# archiver\n" "AR=\"%s\"\n\n",cctx->host.ar) < 0)
+		return SLBT_SYSTEM_ERROR(dctx,0);
+
+	if (slbt_dprintf(fdout,"# name mangler\n" "NM=\"%s\"\n\n",cctx->host.nm) < 0)
+		return SLBT_SYSTEM_ERROR(dctx,0);
+
+	if (slbt_dprintf(fdout,"# archive librarian\n" "RANLIB=\"%s\"\n\n",cctx->host.ranlib) < 0)
+		return SLBT_SYSTEM_ERROR(dctx,0);
+
+	if (slbt_dprintf(fdout,"# assembler\n" "AS=\"%s\"\n\n",cctx->host.as) < 0)
+		return SLBT_SYSTEM_ERROR(dctx,0);
+
+	if (slbt_dprintf(fdout,"# PE targets: modern import library compiler\n" "MDSO=%s%s%s\n\n",
+			cctx->host.mdso[0] ? "\"" : "",
+			cctx->host.mdso[0] ? cctx->host.mdso : "",
+			cctx->host.mdso[0] ? "\"" : "") < 0)
+		return SLBT_SYSTEM_ERROR(dctx,0);
+
+	if (slbt_dprintf(fdout,"# PE targets: coff import library compiler\n" "DLLTOOL=%s%s%s\n\n",
+			cctx->host.dlltool[0] ? "\"" : "",
+			cctx->host.dlltool[0] ? cctx->host.dlltool : "",
+			cctx->host.dlltool[0] ? "\"" : "") < 0)
+		return SLBT_SYSTEM_ERROR(dctx,0);
+
+	if (slbt_dprintf(fdout,"# PE targets: resource compiler\n" "WINDRES=%s%s%s\n\n",
+			cctx->host.windres[0] ? "\"" : "",
+			cctx->host.windres[0] ? cctx->host.windres : "",
+			cctx->host.windres[0] ? "\"" : "") < 0)
+		return SLBT_SYSTEM_ERROR(dctx,0);
+
+	if (slbt_dprintf(fdout,"%s%s%s\n",lconf_end,lconf_guard,lconf_guard) < 0)
+		return SLBT_SYSTEM_ERROR(dctx,0);
+
+	return 0;
+}
+
 int slbt_output_config(const struct slbt_driver_ctx * dctx)
 {
 	struct slbt_driver_ctx_impl *   ictx;
@@ -96,5 +183,8 @@ int slbt_output_config(const struct slbt_driver_ctx * dctx)
 		return slbt_output_config_lconf(
 			dctx,lconf);
 
+	if (ictx->mkvarsctx || true)
+		return slbt_output_config_mkvars(dctx);
+
 	return 0;
 }