build: define _GNU_SOURCE only on the command line

Not in source files

See https://ariadne.space/2021/12/21/stop-defining-feature-test-macros-in-your-code/

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 0 insertions, 3 deletions

diff --git a/jim.c b/jim.c
index ea60e10..f4fd955 100644
--- a/jim.c
+++ b/jim.c
@@ -41,9 +41,6 @@
  * official policies, either expressed or implied, of the Jim Tcl Project.
  **/
 #define JIM_OPTIMIZATION        /* comment to avoid optimizations and reduce size */
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE             /* Mostly just for environ */
-#endif
 
 #include <stdio.h>
 #include <stdlib.h>