On Mon, Aug 03, 2026 at 01:56:35PM +0200, Torbjorn SVENSSON wrote: > On 2026-08-03 13:54, Jakub Jelinek wrote: > > On Mon, Aug 03, 2026 at 01:50:18PM +0200, Torbjorn SVENSSON wrote: > > > This change introduces new failures for arm-none-eabi using > > > thumb/arch=armv6s-m/cpu=cortex-m0/float-abi=soft/fpu=auto. > > > > > > Testing torture/bitint-100.c, -O0 > > > doing compile > > > Executing on host: /build/install-native/bin/arm-none-eabi-gcc > > > /build/gcc_src/gcc/testsuite/gcc.dg/torture/bitint-100.c -mthumb > > > -march=armv6s-m -mcpu=cortex-m0 -mfloat-abi=soft -mfpu=auto -dumpbase > > > "" -fdiagnostics-plain-output -O0 -std=c23 -pedantic-errors > > > --specs=rdimon.specs -Wl,--start-group -lc -lm -Wl,--end-group > > > --specs=nosys.specs -Wl,--allow-multiple-definition > > > -Wl,-u,_isatty,-u,_fstat -Wl,-wrap,exit -Wl,-wrap,_exit -Wl,-wrap,main > > > -Wl,-wrap,abort -Wl,gcc_tg.o -lm -T qemu.ld -o ./bitint-100.exe > > > (timeout = 800) > > > spawn -ignore SIGHUP /build/install-native/bin/arm-none-eabi-gcc > > > /build/gcc_src/gcc/testsuite/gcc.dg/torture/bitint-100.c -mthumb > > > -march=armv6s-m -mcpu=cortex-m0 -mfloat-abi=soft -mfpu=auto -dumpbase > > > -fdiagnostics-plain-output -O0 -std=c23 -pedantic-errors > > > --specs=rdimon.specs -Wl,--start-group -lc -lm -Wl,--end-group > > > --specs=nosys.specs -Wl,--allow-multiple-definition > > > -Wl,-u,_isatty,-u,_fstat -Wl,-wrap,exit -Wl,-wrap,_exit -Wl,-wrap,main > > > -Wl,-wrap,abort -Wl,gcc_tg.o -lm -T qemu.ld -o ./bitint-100.exe > > > pid is 1478576 -1478576 > > > /build/install-native/arm-none-eabi/bin/ld: /tmp/ccgSaSgH.o: in function > > > `f1': > > > bitint-100.c:(.text+0x5a): undefined reference to > > > `__atomic_compare_exchange_4' > > > /build/install-native/arm-none-eabi/bin/ld: > > > (__atomic_compare_exchange_4): Unknown destination type (ARM/Thumb) in > > > /tmp/ccgSaSgH.o > > > bitint-100.c:(.text+0x5a): dangerous relocation: unsupported relocation > > > /build/install-native/arm-none-eabi/bin/ld: /tmp/ccgSaSgH.o: in function > > > `f2': > > > bitint-100.c:(.text+0xa4): undefined reference to > > > `__atomic_compare_exchange_4' > > > /build/install-native/arm-none-eabi/bin/ld: > > > (__atomic_compare_exchange_4): Unknown destination type (ARM/Thumb) in > > > /tmp/ccgSaSgH.o > > > bitint-100.c:(.text+0xa4): dangerous relocation: unsupported relocation > > > ... > > > collect2: error: ld returned 1 exit status > > > status 1 > > > compiler exited with status 1 > > > FAIL: gcc.dg/torture/bitint-100.c -O0 (test for excess errors) > > > > > > Same failure exist on both trunk and releases/gcc-16. > > > > I thought gcc has been changed to add -latomic_asneeded by default. > > Or is this because the linker doesn't support it in this configuration? > To my knowledge, there is no atomic support for armv6s-m, but I can be wrong.
Most of the tests that are dg-do run and use atomics on int/long use sync_int_long effective target. Atomics on _BitInt(17), i.e. something on all currently supported targets larger than short, probably need to be treated the same. Tested on x86_64-linux, ok for trunk? 2026-08-04 Jakub Jelinek <[email protected]> PR target/124948 * gcc.dg/torture/bitint-100.c: Require also sync_int_long effective target. --- gcc/testsuite/gcc.dg/torture/bitint-100.c.jj 2026-07-14 10:43:39.057947557 +0200 +++ gcc/testsuite/gcc.dg/torture/bitint-100.c 2026-08-04 17:43:31.937193354 +0200 @@ -1,5 +1,5 @@ /* PR target/124948 */ -/* { dg-do run { target bitint } } */ +/* { dg-do run { target { bitint && sync_int_long } } } */ /* { dg-options "-std=c23 -pedantic-errors" } */ /* { dg-skip-if "" { ! run_expensive_tests } { "*" } { "-O0" "-O2" } } */ /* { dg-skip-if "" { ! run_expensive_tests } { "-flto" } { "" } } */ Jakub
