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-rw-r--r--gcc/acconfig.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/acconfig.h b/gcc/acconfig.h
index dec619b84b0..17324b57611 100644
--- a/gcc/acconfig.h
+++ b/gcc/acconfig.h
@@ -26,6 +26,9 @@
/* Define to `int' if <sys/types.h> doesn't define. */
#undef ssize_t
+/* Define if cpp should also search $prefix/include. */
+#undef PREFIX_INCLUDE_DIR
+
@BOTTOM@
/* Bison unconditionally undefines `const' if neither `__STDC__' nor