use "glibc errno" trick not only for ash, but for entire busybox

(add/remove: 1/1 grow/shrink: 37/37 up/down: 139/-228)        Total: -89 bytes

1 files changed, 9 insertions, 0 deletions

diff --git a/applets/applets.c b/applets/applets.c
index e905ebec4..bd3704394 100644
--- a/applets/applets.c
+++ b/applets/applets.c
@@ -641,10 +641,19 @@ void run_applet_and_exit(const char *name, char **argv)
 }
 
 
+#ifdef __GLIBC__
+/* Make it reside in R/W memory: */
+int *const bb_errno __attribute__ ((section (".data")));
+#endif
+
 int main(int argc, char **argv)
 {
         const char *s;
 
+#ifdef __GLIBC__
+        (*(int **)&bb_errno) = __errno_location();
+#endif
+
 #if !BB_MMU
         /* NOMMU re-exec trick sets high-order bit in first byte of name */
         if (argv[0][0] & 0x80) {