meson: check for _NL_TIME_WEEK_1STDAY in langinfo.h

... which is required for `cal`.

Fixes GH-2316

diff --git a/meson.build b/meson.build
index a0c5457c58aba33850814cff71d64532e186c09b..37141e7db89a3ee72163ab99b2ce07fb3fc61294 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -484,6 +484,18 @@ have = cc.compiles('''
   name : 'langinfo.h defines _NL_ABALTMON_x constants')
 conf.set('HAVE_LANGINFO_NL_ABALTMON', have ? 1 : false)
 
+have = cc.compiles('''
+   #define _GNU_SOURCE 1
+   #include <langinfo.h>
+   int main(void) {
+        char *str;
+        str = nl_langinfo (_NL_TIME_WEEK_1STDAY);
+        return 0;
+   }
+   ''',
+  name : 'langinfo.h defines _NL_TIME_WEEK_1STDAY constant')
+conf.set('HAVE_DECL__NL_TIME_WEEK_1STDAY', have ? 1 : false)
+
 funcs = '''
         clearenv
         close_range