[16/17] Regex: Define __USE_GNU for non-GLIBC systems.
Commit Message
This patch defines __USE_GNU for non-GLIBC systems. For example, *BSD
need it.
2017-12-05 Arnold D. Robbins <arnold@skeeve.com>
* posix/regex.h: Define __USE_GNU if not _LIBC. Needed when
regex is being used standalone on non-GLIBC systems.
Comments
On Fri, 8 Dec 2017, Arnold Robbins wrote:
> This patch defines __USE_GNU for non-GLIBC systems. For example, *BSD
> need it.
_LIBC refers to glibc being *built*. This change would cause the header
to expose inappropriate symbols when used in an installation of glibc.
Joseph Myers <joseph@codesourcery.com> wrote:
> On Fri, 8 Dec 2017, Arnold Robbins wrote:
>
> > This patch defines __USE_GNU for non-GLIBC systems. For example, *BSD
> > need it.
>
> _LIBC refers to glibc being *built*. This change would cause the header
> to expose inappropriate symbols when used in an installation of glibc.
>
> --
> Joseph S. Myers
> joseph@codesourcery.com
There don't seem to be other uses of _LIBC in the regex.h header.
All I know is that the __USE_GNU is needed on non-GLIBC systems.
Removing that bit doesn't affect compiling on Linux, nor does having
it there.
So, I don't see the harm in it, but I'm not a GLIBC guy, so I'm
probably still missing something.
Arnold
@@ -22,6 +22,10 @@
#include <sys/types.h>
+#ifndef _LIBC
+#define __USE_GNU 1
+#endif
+
/* Allow the use in C++ code. */
#ifdef __cplusplus
extern "C" {