[Bug libstdc++/112882] [14 Regression] std::clamp no longer usable in header only mode

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112882

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This minimal fix is enough to remove the reference to __glibcxx_assert_fail
when optimization is enabled (at any level):

--- a/libstdc++-v3/include/bits/c++config
+++ b/libstdc++-v3/include/bits/c++config
@@ -598,7 +598,7 @@ namespace std

 # define __glibcxx_assert(cond)                                               
\
   do {                                                                 \
-    if _GLIBCXX17_CONSTEXPR (_GLIBCXX_DO_ASSERT)                       \
+    if (_GLIBCXX_DO_ASSERT)                    \
       if (__builtin_expect(!bool(cond), false))                               
\
        _GLIBCXX_ASSERT_FAIL(cond);                                     \
   } while (false)

But we still need the more complete fix for -O0.