[PATCH 1/2] Fix duplicated __strchrnul() declaration error on OS/2 kLIBC

[KO Myung-Hun]

OS/2 kLIBC has __strchrnul(). But HAVE___STRCHRNUL is undefined.
'static' declarion of __strchrnul() causes an error with gcc4 because
OS/2 kLIBC declares __strchrnul() as public.

-----
gcc -DHAVE_CONFIG_H -I. -I../src   -D__ST_MT_ERRNO__  -Wno-cast-qual 
-Wno-conversion -Wno-float-equal -Wno-sign-compare -Wno-undef 
-Wno-unused-function -Wno-unused-parameter -Wno-float-conversion 
-Wimplicit-fallthrough -Wno-pedantic -Wno-sign-conversion -Wno-type-limits 
-Wno-unsuffixed-float-constants -O2 -Zomf -Zmt -MT libgnu_a-fnmatch.o -MD -MP 
-MF .deps/libgnu_a-fnmatch.Tpo -c -o libgnu_a-fnmatch.o `test -f 'fnmatch.c' || 
echo './'`fnmatch.c
fnmatch.c:135:1: error: static declaration of '__strchrnul' follows non-static 
declaration
  135 | __strchrnul (s, c)
      | ^~~~~~~~~~~
In file included from fnmatch.c:34:
f:/lang/gcc/usr/include/string.h:198:10: note: previous declaration of 
'__strchrnul' was here
  198 | char    *__strchrnul(const char *, int);
      |          ^~~~~~~~~~~
-----
---
 lib/fnmatch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/fnmatch.c b/lib/fnmatch.c
index 4da8c5f..decfe7a 100644
--- a/lib/fnmatch.c
+++ b/lib/fnmatch.c
@@ -130,7 +130,7 @@ extern int errno;
 
 /* This function doesn't exist on most systems.  */
 
-# if !defined HAVE___STRCHRNUL && !defined _LIBC
+# if !defined HAVE___STRCHRNUL && !defined _LIBC && !defined __KLIBC__
 static char *
 __strchrnul (s, c)
      const char *s;
-- 
2.30.0