configure.ac: include <libguile.h> when checking scm_* functions

Signed-off-by: Daiki Ueno <ueno@gnu.org>

diff --git a/configure.ac b/configure.ac
index 157178d39210fd4f3f29318bd16cdc6eb9c2cc92..d38054804b8f092cd2db0044699d6df96954d02b 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1054,7 +1054,7 @@ if test "$opt_guile_bindings" = "yes"; then
       CFLAGS="$CFLAGS $GUILE_CFLAGS"
       LIBS="$LIBS $GUILE_LDFLAGS"
       AC_MSG_CHECKING([whether GNU Guile is recent enough])
-      AC_LINK_IFELSE([AC_LANG_PROGRAM([], [scm_from_locale_string ("")])],
+      AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <libguile.h>], [scm_from_locale_string ("")])],
         [], [opt_guile_bindings=no])
       CFLAGS="$save_CFLAGS"
       LIBS="$save_LIBS"