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-rw-r--r--config.h.in4
1 files changed, 4 insertions, 0 deletions
diff --git a/config.h.in b/config.h.in
index 1761f99..84c20a9 100644
--- a/config.h.in
+++ b/config.h.in
@@ -1,3 +1,7 @@
+#ifndef __OPTIMIZE__
+# error "glibc cannot be compiled without optimization"
+#endif
+
/* Define if using GNU ld, with support for weak symbols in a.out,
and for symbol set and warning messages extensions in a.out and ELF.
This implies HAVE_WEAK_SYMBOLS; set by --with-gnu-ld. */