Check if -D_REENTRANT is needed for localtime_r.

On at least HP-UX 11.11, the localtime_r declararation is behind
ifdef _REENTRANT.  Check for and add if needed.

1 files changed, 13 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index e89d4f17f..3712d55db 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1969,6 +1969,19 @@ AC_SEARCH_LIBS([nanosleep], [rt posix4], [AC_DEFINE([HAVE_NANOSLEEP], [1],
 AC_SEARCH_LIBS([clock_gettime], [rt],
         [AC_DEFINE([HAVE_CLOCK_GETTIME], [1], [Have clock_gettime])])
 
+dnl check if we need -D_REENTRANT for localtime_r declaration.
+AC_CHECK_DECL([localtime_r], [],
+        [ saved_CPPFLAGS="$CFLAGS"
+          CPPFLAGS="$CPPFLAGS -D_REENTRANT"
+          unset ac_cv_have_decl_localtime_r
+          AC_CHECK_DECL([localtime_r], [],
+                [ CPPFLAGS="$saved_CPPFLAGS" ],
+                [ #include <time.h> ]
+          )
+        ],
+        [ #include <time.h> ]
+)
+
 dnl Make sure prototypes are defined for these before using them.
 AC_CHECK_DECL([strsep],
         [AC_CHECK_FUNCS([strsep])],