While reading the compiler output of make check-target-libstdc++-v3
for buggy code, e.g. cmp_equal(1.0, 1.0), the error message was very short, and I saw no hint that neither of the two template arguments weren't integers. Essentially, the trace was: 1. my faulty line 2. required from here 3. static_assert(false) On regular builds with g++ the error message mentions the static_assert(__is_standard_integer), and is much less cryptic. Please ignore if this is intended behaviour. Tested on x86_64 with: make check-target-libstdc++-v3 (in a no PCH build). Luc Grosheintz (1): libstdc++: Improve diagnostic message for `cmp_*` and `in_range`. libstdc++-v3/include/std/utility | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) -- 2.49.0