common: Avoid errors on systems that define strnlen but not strndup

Add a configure test for a system library supplied strnlen, and disable
the embedded version in common if one is found.

Signed-off-by: Will Miles <wmiles@sgl.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/configure.ac b/configure.ac
index 735fdc34..359d61bf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -304,8 +304,8 @@ AC_FUNC_MKTIME
 AC_FUNC_STRCOLL
 AC_CHECK_FUNCS([dup2 getcwd getmntinfo gettimeofday memmove memset \
                 mkdir realpath regcomp rmdir setenv setlocale strcasecmp \
-                strchr strcspn strdup strerror strndup strrchr strsep strstr \
-                strtol swprintf tcflush wcwidth uname])
+                strchr strcspn strdup strerror strndup strnlen strrchr \
+                strsep strstr strtol swprintf tcflush wcwidth uname])
 AC_CHECK_MEMBERS([struct stat.st_blksize],,,[[#include <sys/stat.h>]])
 
 # For the diskspace code