mingw32.h (SHARED_LIBGCC_SPEC): Synchronize with cygwin-host.

[gcc.git] / libcpp / configure.ac

diff --git a/libcpp/configure.ac b/libcpp/configure.ac
index 29bd8c5e6f1a7bddb628f415f3138dfeaa69a483..34ae5c206222f94d90ce50c2aa9757558a2f6add 100644 (file)
--- a/libcpp/configure.ac
+++ b/libcpp/configure.ac
@@ -132,8 +132,19 @@ if test $enable_checking != no ; then
 [Define if you want more run-time sanity checks.])
 fi
 
+AC_ARG_ENABLE(canonical-system-headers,
+[  --enable-canonical-system-headers
+                          enable or disable system headers canonicalization],
+[],
+enable_canonical_system_headers=yes)
+if test $enable_canonical_system_headers != no; then
+  AC_DEFINE(ENABLE_CANONICAL_SYSTEM_HEADERS,
+            1, [Define to enable system headers canonicalization.])
+fi
+
 m4_changequote(,)
 case $target in
+       aarch64*-*-* | \
        alpha*-*-* | \
        arm*-*-*eabi* | \
        arm*-*-symbianelf* | \