Add setlocale() call (fix #1740)

configure.ac

@@ -149,6 +149,7 @@ AC_CHECK_MEMBER([struct tm.tm_gmtoff], [AC_DEFINE([HAVE_TM_TM_GMT_OFF],1,[Define
                 [], [[#include <time.h>]])
 AC_CHECK_MEMBER([struct tm.__tm_gmtoff], [AC_DEFINE([HAVE_TM___TM_GMT_OFF],1,[Define to 1 if the system has the __tm_gmt_off field in struct tm])],
                 [], [[#include <time.h>]])
+AC_FIND_FUNC([setlocale], [c], [#include <locale.h>], [0,0])
 
 dnl Figure out if we have the pthread functions we actually need
 AC_FIND_FUNC_NO_LIBS([pthread_key_create], [], [#include <pthread.h>], [NULL, NULL])

src/main.c

@@ -2,6 +2,9 @@
 #include <ctype.h>
 #include <errno.h>
 #include <libgen.h>
+#ifdef HAVE_SETLOCALE
+#include <locale.h>
+#endif
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
@@ -319,6 +322,10 @@ int main(int argc, char* argv[]) {
   jv ARGS = jv_array(); /* positional arguments */
   jv program_arguments = jv_object(); /* named arguments */
 
+#ifdef HAVE_SETLOCALE
+  (void) setlocale(LC_ALL, "");
+#endif
+
 #ifdef WIN32
   jv_tsd_dtoa_ctx_init();
   fflush(stdout);