Disable option checking in the toplevel, avoid 2.64 fopen glitch.

[thirdparty/binutils-gdb.git] / config / override.m4

diff --git a/config/override.m4 b/config/override.m4
index bf112db99a89f35fdc48b272de18fd7a03501eca..a10146ff75afedac20a7ad489bdbbb09746b49d6 100644 (file)
--- 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