add USE_PORTABLE_CODE option and use it in find applet

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

diff --git a/Config.in b/Config.in
index 99f814e..05bc3a5 100644 (file)
--- 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 ba8fa08..76f6709 100644 (file)
--- 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 */