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-rw-r--r--config/override.m413
1 files changed, 13 insertions, 0 deletions
diff --git a/config/override.m4 b/config/override.m4
index bf112db..a10146f 100644
--- a/config/override.m4
+++ b/config/override.m4
@@ -58,6 +58,19 @@ m4_define([AC_INIT], m4_defn([AC_INIT])[
_GCC_AUTOCONF_VERSION_CHECK
])
+
+dnl Turn AC_DISABLE_OPTION_CHECKING into a no-op if not defined.
+m4_ifndef([AC_DISABLE_OPTION_CHECKING],
+ [m4_define([AC_DISABLE_OPTION_CHECKING])])
+
+
+dnl Fix 2.64 cross compile detection for AVR and RTEMS
+dnl by not trying to compile fopen.
+m4_if(m4_defn([m4_PACKAGE_VERSION]), [2.64],
+ [m4_foreach([_GCC_LANG], [C, C++, Fortran, Fortran 77],
+ [m4_define([_AC_LANG_IO_PROGRAM(]_GCC_LANG[)], m4_defn([AC_LANG_PROGRAM(]_GCC_LANG[)]))])])
+
+
m4_version_prereq([2.60],, [
dnl We use $ac_pwd in some of the overrides below; ensure its definition
m4_divert_push([PARSE_ARGS])dnl