libbb: fix compile failure if both ARG_MAX and _SC_ARG_MAX are defined

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

diff --git a/libbb/sysconf.c b/libbb/sysconf.c
index 4dbffbebdd1472499aa7546338fe88fb4dc8b81e..031901980337dc65ad22e9195ffbdd0b19fca987 100644 (file)
--- a/libbb/sysconf.c
+++ b/libbb/sysconf.c
@@ -8,7 +8,7 @@
  */
 #include "libbb.h"
 
-#if defined _SC_ARG_MAX
+#if !defined(ARG_MAX) && defined(_SC_ARG_MAX)
 unsigned FAST_FUNC bb_arg_max(void)
 {
        return sysconf(_SC_ARG_MAX);