Prefer `gm4' over `m4' (due to BSD et al.).

diff --git a/configure.in b/configure.in
index d945a8f1ce8874567a55c3c6400206fa96be5f1e..2cf123a49ee6c13b35d118277ba319d282f7b723 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -98,7 +98,7 @@ AC_PROG_INSTALL
 AC_PROG_RANLIB
 AC_CHECK_PROG(FLEX, flex, flex)
 AC_CHECK_PROG(BISON, bison, bison)
-AC_CHECK_PROG(M4, m4, m4)
+AC_CHECK_PROGS(M4, gm4 m4, m4)
 if test -z "$FLEX" -o -z "$BISON" -o -z "$M4" ; then
        AC_MSG_ERROR([Some tools required for building BIRD are missing.])
        fi