add USE_PORTABLE_CODE option and use it in find applet

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2 files changed, 12 insertions, 0 deletions

diff --git a/Config.in b/Config.in
index 99f814e5a..05bc3a58a 100644
--- a/Config.in
+++ b/Config.in
@@ -30,6 +30,14 @@ config EXTRA_COMPAT
           some GNU extensions in libc. You probably only need this option
           if you plan to run busybox on desktop.
 
+config USE_PORTABLE_CODE
+        bool "Avoid using GCC-specific code constructs"
+        default n
+        help
+          Use this option if you are trying to compile busybox with
+          compiler other than gcc.
+          If you do use gcc, this option may needlessly increase code size.
+
 choice
         prompt "Buffer allocation policy"
         default FEATURE_BUFFERS_USE_MALLOC
diff --git a/findutils/find.c b/findutils/find.c
index ba8fa0854..76f670942 100644
--- a/findutils/find.c
+++ b/findutils/find.c
@@ -276,7 +276,11 @@ ACTF(inum)
 ACTF(exec)
 {
         int i, rc;
+#if ENABLE_USE_PORTABLE_CODE
+        char **argv = alloca(sizeof(char*) * (ap->exec_argc + 1));
+#else /* gcc 4.3.1 generates smaller code: */
         char *argv[ap->exec_argc + 1];
+#endif
         for (i = 0; i < ap->exec_argc; i++)
                 argv[i] = subst(ap->exec_argv[i], ap->subst_count[i], fileName);
         argv[i] = NULL; /* terminate the list */