On Sun, 16 Mar 2025 at 21:54, Jonathan Wakely jwakely@redhat.com wrote:
On Sun, 16 Mar 2025 at 13:16, ci_notify@linaro.org wrote:
Dear contributor,
Our automatic CI has detected problems related to your patch(es). Please find some details below.
In arm-eabi cortex-m23 soft, after: | commit gcc-15-8035-g7ee31bc9276 | Author: Jonathan Wakely jwakely@redhat.com | Date: Thu Mar 13 13:34:55 2025 +0000 | | libstdc++: Implement <stdbit.h> for C++26 (P3370R1) | | This is the first part of the P3370R1 proposal just approved by the | committee in Wrocław. This adds C++ equivalents of the functions added | to C23 by WG14 N3022. | ... 16 lines of the commit log omitted.
Produces 2 regressions: | | regressions.sum: | Running libstdc++:libstdc++-dg/conformance.exp ... | FAIL: 20_util/stdbit/1.cc -std=gnu++26 (test for excess errors) | UNRESOLVED: 20_util/stdbit/1.cc -std=gnu++26 compilation failed to produce executable
Used configuration : *CI config* tcwg_gnu_embed_check_gcc arm-eabi -mthumb -march=armv8-m.base -mtune=cortex-m23 -mfloat-abi=soft -mfpu=auto *configure and test flags:* --target arm-eabi --disable-multilib --with-mode=thumb --with-cpu=cortex-m23 --with-float=soft --target_board=-mthumb/-march=armv8-m.base/-mtune=cortex-m23/-mfloat-abi=soft/-mfpu=auto qemu_cpu=cortex-m33
We track this bug report under https://linaro.atlassian.net/browse/GNU-1543. Please let us know if you have a fix.
All the errors are of the form: error: 'ULLONG_MAX' was not declared in this scope but the test includes <limits.h>.
So this target doesn't support long long? Or just doesn't define ULLONG_MAX?
It does...
I've manually reproduced it, and ISTM the problem is __STDC_VERSION__ is not defined, as gcc/glimits.h expects: https://gcc.gnu.org/git/?p=gcc.git%3Ba=blob%3Bf=gcc/glimits.h%3Bh=d5877602bf...
Compiling ============== #include <limits.h> unsigned long long var = ULLONG_MAX; ================ works with the same compiler, in C mode.
But why would that work on arm-linux-gnueabihf and not on arm-none-eabi?
Christophe
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