[Bug libstdc++/115797] [15 Regression] 'extern "C" { #include <math.h> }' fails with 'error: template with C linkage' since r15-1857-gde19b516edbf91

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115797

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2024-07-05
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=69386

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
We have a test verifying that it works, 17_intro/headers/c++2011/linkage.cc

But it doesn't fail here because it's only run for -std=gnu++11 and <cmath>
only includes <type_traits> for C++17 an up.