On Linux/x86_64,
c9525a790291bb924ac5d9887dd1f57e76a66a03 is the first bad commit
commit c9525a790291bb924ac5d9887dd1f57e76a66a03
Author: Jonathan Wakely <[email protected]>
Date: Mon Mar 30 12:13:39 2026 +0100
libstdc++: Rename saturation arithmetic for C++26 (P4052R0)
caused
FAIL: g++.dg/modules/compile-std1.C module-cmi std.compat
(gcm.cache/std.compat.gcm)
FAIL: g++.dg/modules/compile-std1.C module-cmi std (gcm.cache/std.gcm)
FAIL: g++.dg/modules/compile-std1.C -std=c++26 (test for excess errors)
with GCC configured with
../../gcc/configure
--prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r16-8385/usr
--enable-clocale=gnu --with-system-zlib --with-demangler-in-ld
--with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl
--enable-libmpx x86_64-linux --disable-bootstrap
To reproduce:
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="modules.exp=g++.dg/modules/compile-std1.C
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="modules.exp=g++.dg/modules/compile-std1.C
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="modules.exp=g++.dg/modules/compile-std1.C
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="modules.exp=g++.dg/modules/compile-std1.C
--target_board='unix{-m64\ -march=cascadelake}'"
(Please directly reply to this email for question about this report.)
(If you met problems with cascadelake related, disabling AVX512F in command
line might save that.)
(However, please make sure that there is no potential problems with AVX512.)
