X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=config%2Foverride.m4;h=52bd1c3d1b82469bf38c11dddf5fbec82878820f;hb=00e52e5376c7ec604a739e6242e6be36221162d7;hp=fc2d5272d7498a15049d5e273388f98c42af7177;hpb=34017a41b36f663bf4c2ad3162315d9caf231a7e;p=deliverable%2Fbinutils-gdb.git

diff --git a/config/override.m4 b/config/override.m4
index fc2d5272d7..52bd1c3d1b 100644
--- a/config/override.m4
+++ b/config/override.m4
@@ -48,6 +48,12 @@ _GCC_AUTOCONF_VERSION_CHECK
 ])
 
 
+dnl Ensure we do not use a buggy M4.
+m4_if(m4_index([..wi.d.], [.d.]), [-1],
+  [m4_fatal(m4_do([m4 with buggy strstr detected.  Please install
+GNU M4 1.4.16 or newer and set the M4 environment variable]))])
+
+
 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],