Please read https://gcc.gnu.org/contribute.html#patches and ensure
you've included everything, for example ...

On 22/06/24 17:11 -0400, Shengdun Wang wrote:
__glibcxx_assert_fail is not defined when we disable
the libstdcxx-verbose. This causes ABI break when a
binary is compiled with verbose enabled.

libstdc++-v3/ChangeLog:

        * src/c++11/assert_fail.cc:

This is missing a description of the change.

The PR number should be in the summary line, and the ChangeLog entry.

Patches for libstdc++ should be CC'd to the libstdc++ list:
https://gcc.gnu.org/lists.html

No DCO sign-off:
https://gcc.gnu.org/contribute.html#legal



---
libstdc++-v3/src/c++11/assert_fail.cc | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/libstdc++-v3/src/c++11/assert_fail.cc 
b/libstdc++-v3/src/c++11/assert_fail.cc
index 6d99c7958f3..930cabd5ee6 100644
--- a/libstdc++-v3/src/c++11/assert_fail.cc
+++ b/libstdc++-v3/src/c++11/assert_fail.cc
@@ -22,23 +22,28 @@
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

+#include <bits/c++config.h>
+#ifdef _GLIBCXX_VERBOSE_ASSERT
#include <cstdio> // for std::fprintf, stderr
+#endif
#include <cstdlib>        // for std::abort

-#ifdef _GLIBCXX_VERBOSE_ASSERT
namespace std
{
  [[__noreturn__]]
  void
-  __glibcxx_assert_fail(const char* file, int line,
-                       const char* function, const char* condition) noexcept
+  __glibcxx_assert_fail( [[maybe_unused]] const char* file,
+                         [[maybe_unused]] int line,
+                         [[maybe_unused]] const char* function,
+                         [[maybe_unused]] const char* condition) noexcept
  {
+#ifdef _GLIBCXX_VERBOSE_ASSERT
    if (file && function && condition)
      fprintf(stderr, "%s:%d: %s: Assertion '%s' failed.\n",
              file, line, function, condition);
    else if (function)
      fprintf(stderr, "%s: Undefined behavior detected.\n", function);
+#endif
    abort();
  }
}
-#endif

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