driver: added --dumpmachine support.

4 files changed, 24 insertions, 5 deletions

diff --git a/src/driver/slbt_amain.c b/src/driver/slbt_amain.c
index d364ef4..3f78e76 100644
--- a/src/driver/slbt_amain.c
+++ b/src/driver/slbt_amain.c
@@ -164,6 +164,12 @@ int slbt_main(char ** argv, char ** envp, const struct slbt_fd_ctx * fdctx)
 			? !argv || !argv[0] || !argv[1] || !argv[2]
 			: SLBT_ERROR;
 
+	/* --dumpmachine disables all other actions */
+	if (dctx->cctx->drvflags & SLBT_DRIVER_OUTPUT_MACHINE)
+		return slbt_output_machine(dctx)
+			? SLBT_ERROR : SLBT_OK;
+
+	/* --version is always the first action */
 	if (dctx->cctx->drvflags & SLBT_DRIVER_VERSION)
 		if ((slbt_version(dctx,fdout)) < 0)
 			return slbt_exit(dctx,SLBT_ERROR);
diff --git a/src/driver/slbt_driver_ctx.c b/src/driver/slbt_driver_ctx.c
index eed51bd..f8393ef 100644
--- a/src/driver/slbt_driver_ctx.c
+++ b/src/driver/slbt_driver_ctx.c
@@ -295,6 +295,7 @@ static int slbt_split_argv(
 	struct argv_entry *		finish;
 	struct argv_entry *		features;
 	struct argv_entry *		ccwrap;
+	struct argv_entry *		dumpmachine;
 	const struct argv_option **	popt;
 	const struct argv_option **	optout;
 	const struct argv_option *	optv[SLBT_OPTV_ELEMENTS];
@@ -337,8 +338,8 @@ static int slbt_split_argv(
 		meta = argv_get(argv,optv,ARGV_VERBOSITY_NONE,fderr);
 	}
 
-	/* missing all of --mode, --help, --version, --config, --features, and --finish? */
-	mode = help = version = config = finish = features = ccwrap = 0;
+	/* missing all of --mode, --help, --version, --config, --dumpmachine, --features, and --finish? */
+	mode = help = version = config = finish = features = ccwrap = dumpmachine = 0;
 
 	for (entry=meta->entries; entry->fopt; entry++)
 		if (entry->tag == TAG_MODE)
@@ -355,10 +356,12 @@ static int slbt_split_argv(
 			features = entry;
 		else if (entry->tag == TAG_CCWRAP)
 			ccwrap = entry;
+		else if (entry->tag == TAG_DUMPMACHINE)
+			dumpmachine = entry;
 
 	argv_free(meta);
 
-	if (!mode && !help && !version && !config && !finish && !features) {
+	if (!mode && !help && !version && !config && !finish && !features && !dumpmachine) {
 		slbt_dprintf(fderr,
 			"%s: error: --mode must be specified.\n",
 			program);
@@ -366,7 +369,7 @@ static int slbt_split_argv(
 	}
 
 	/* missing compiler? */
-	if (!ctx.unitidx && !help && !version && !finish && !features) {
+	if (!ctx.unitidx && !help && !version && !finish && !features && !dumpmachine) {
 		if (flags & SLBT_DRIVER_VERBOSITY_ERRORS)
 			slbt_dprintf(fderr,
 				"%s: error: <compiler> is missing.\n",
@@ -491,7 +494,7 @@ static int slbt_split_argv(
 	if (ctx.unitidx) {
 		(void)0;
 
-	} else if (help || version || features) {
+	} else if (help || version || features || dumpmachine) {
 		for (i=0; i<argc; i++)
 			sargv->targv[i] = argv[i];
 
@@ -1482,6 +1485,10 @@ int slbt_get_driver_ctx(
 					cctx.drvflags |= SLBT_DRIVER_CONFIG;
 					break;
 
+				case TAG_DUMPMACHINE:
+					cctx.drvflags |= SLBT_DRIVER_OUTPUT_MACHINE;
+					break;
+
 				case TAG_DEBUG:
 					cctx.drvflags |= SLBT_DRIVER_DEBUG;
 					break;
diff --git a/src/internal/slibtool_driver_impl.h b/src/internal/slibtool_driver_impl.h
index c70c334..b538ebc 100644
--- a/src/internal/slibtool_driver_impl.h
+++ b/src/internal/slibtool_driver_impl.h
@@ -24,6 +24,7 @@ enum app_tags {
 	TAG_HELP_ALL,
 	TAG_VERSION,
 	TAG_CONFIG,
+	TAG_DUMPMACHINE,
 	TAG_DEBUG,
 	TAG_DRY_RUN,
 	TAG_FEATURES,
diff --git a/src/skin/slbt_skin_default.c b/src/skin/slbt_skin_default.c
index b499101..a41b6d0 100644
--- a/src/skin/slbt_skin_default.c
+++ b/src/skin/slbt_skin_default.c
@@ -48,6 +48,11 @@ const struct argv_option slbt_default_options[] = {
 	{"features",		0,TAG_FEATURES,ARGV_OPTARG_NONE,0,0,0,
 				"show feature information"},
 
+	{"dumpmachine",		0,TAG_DUMPMACHINE,ARGV_OPTARG_NONE,0,0,0,
+				"print the cached result of the native compiler's "
+				"-dumpmachine output (bootstrapping: print the cached, "
+				"manual setting of CCHOST)."},
+
 	{"legabits",		0,TAG_LEGABITS,ARGV_OPTARG_OPTIONAL,0,
 				"enabled|disabled",0,
 				"enable/disable legacy bits, i.e. "