Import latest m4/m4.m4.

[bison.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index c7e4fd84c7835ec6a6b8e2ffa77957a91a7adb59..42308f3f304a5c4d21c51ef58c2bf0f0c29a2c88 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -94,6 +94,8 @@ AC_PROG_YACC
 AC_PROG_RANLIB
 AC_PROG_GNU_M4
 AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.])
+AC_DEFINE_UNQUOTED([M4_GNU_OPTION], ["$M4_GNU"], [Define to "-g" if GNU M4
+supports -g, otherwise to "".])
 AM_MISSING_PROG([HELP2MAN], [help2man])
 AC_PATH_PROG([XSLTPROC], [xsltproc])
 AC_SUBST([XSLTPROC])