x86_64: Add -mno-sse option

This disables generation of any SSE instructions (in particular
in stdarg function prologues).  Necessary for kernel compiles.

1 files changed, 13 insertions, 2 deletions

diff --git a/libtcc.c b/libtcc.c
index 76ee11c..58dddb9 100644
--- a/libtcc.c
+++ b/libtcc.c
@@ -1303,6 +1303,16 @@ static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
                     flag_name, value);
 }
 
+static const FlagDef m_defs[] = {
+#ifdef TCC_TARGET_X86_64
+    { offsetof(TCCState, nosse), FD_INVERT, "sse" },
+#endif
+    { 0, 0, " no flag" },
+};
+static int tcc_set_m_flag(TCCState *s, const char *flag_name, int value)
+{
+    return set_flag(s, m_defs, countof(m_defs), flag_name, value);
+}
 
 static int strstart(const char *val, const char **str)
 {
@@ -1778,9 +1788,10 @@ reparse:
             s->soname = tcc_strdup(optarg);
             break;
         case TCC_OPTION_m:
-	    if (strcmp(optarg, "32") && strcmp(optarg, "64"))
+	    if (!strcmp(optarg, "32") || !strcmp(optarg, "64"))
+	        s->option_m = tcc_strdup(optarg);
+	    else if (tcc_set_m_flag(s, optarg, 1) < 0)
 	        goto unsupported_option;
-            s->option_m = tcc_strdup(optarg);
             break;
         case TCC_OPTION_o:
             if (s->outfile) {