https://gcc.gnu.org/g:c0da27f37df2fcfd59c6cd234793ed24705f1997
commit r15-3511-gc0da27f37df2fcfd59c6cd234793ed24705f1997
Author: Jason Merrill <ja...@redhat.com>
Date: Tue Aug 27 13:15:38 2024 -0400
libstdc++: avoid __GLIBCXX__ redefinition
testsuite/lib/dg-options.exp defines __GLIBCXX__ to 9999999; avoid a macro
redefinition warning in that case.
libstdc++-v3/ChangeLog:
* include/bits/c++config: Avoid redefining __GLIBCXX__.
Diff:
---
libstdc++-v3/include/bits/c++config | 1 +
1 file changed, 1 insertion(+)
diff --git a/libstdc++-v3/include/bits/c++config
b/libstdc++-v3/include/bits/c++config
index 0f0cc7cd659..54d455be226 100644
--- a/libstdc++-v3/include/bits/c++config
+++ b/libstdc++-v3/include/bits/c++config
@@ -36,6 +36,7 @@
#define _GLIBCXX_RELEASE
// The datestamp of the C++ library in compressed ISO date format.
+#undef __GLIBCXX__ /* The testsuite defines it to 99999999 to block PCH. */
#define __GLIBCXX__
// Macros for various attributes.
