On Thu, May 10, 2018 at 3:07 PM, Martin Jansa <martin.ja...@gmail.com> wrote: > On Thu, May 10, 2018 at 11:43:25PM +0200, Martin Jansa wrote: >> On Thu, May 10, 2018 at 12:27:50PM -0700, Andre McCurdy wrote: >> > On Thu, May 10, 2018 at 12:11 PM, Martin Jansa <martin.ja...@gmail.com> >> > wrote: >> > > On Thu, May 10, 2018 at 11:50:02AM -0700, Khem Raj wrote: >> > >> Hi Martin >> > >> >> > >> Thanks for testing and reporting back >> > >> >> > >> On 5/9/18 2:38 AM, Martin Jansa wrote: >> > >> > My initial tests show couple issues, but usually caused by other >> > >> > changes >> > >> > in that branch, not the gcc-8 itself. >> > >> > >> > >> > 1) strace-4.22 from >> > >> > http://git.openembedded.org/openembedded-core-contrib/commit/?h=kraj/gcc-8&id=af33a8b721cc9caebd3f5226b4c5903f666ab654 >> > >> > fails to build with ptest enabled (it builds with 4.20 version if I >> > >> > revert this change) >> > >> > ../../strace-4.22/tests/inject-nf.c: In function 'main': >> > >> > ../../strace-4.22/tests/inject-nf.c:86:1: error: r7 cannot be used in >> > >> > asm here >> > >> > } >> > >> > ^ >> > >> >> > >> are you targeting thumb1 ? how can I reproduce it ? >> > > >> > > I'm trying to find out what's different in the builds where it was >> > > failing, will provide more info later. >> > >> > This is probably due to making an inline syscall from Thumb (doesn't a >> > matter Thumb1 or Thumb2) with frame pointers enabled. >> > >> > Does adding -fomit-frame-pointer to CFLAGS fix it? >> >> It was with raspberrypi3, thumb (Thumb2) enabled in DISTRO, there is >> already -fno-omit-frame-pointer in the default command line for it, >> adding -fomit-frame-pointer at the end fixes it: >> >> docker-lge @ >> ~/build/build-webos-master/BUILD/work/raspberrypi3-webos-linux-gnueabi/strace/4.22-r0/build/tests >> $ arm-webos-linux-gnueabi-gcc -march=armv7ve -mthumb -mfpu=neon-vfpv4 >> -mfloat-abi=hard -mcpu=cortex-a7 >> --sysroot=/OE/webos/build/build-webos-master/BUILD/work/raspberrypi3-webos-linux-gnueabi/strace/4.22-r0/recipe-sysroot >> -DHAVE_CONFIG_H -I. -I../linux/arm -I../../strace-4.22/linux/arm >> -I../linux -I../../strace-4.22/linux -I.. -I../../strace-4.22 >> -DTESTS_SIZEOF_KERNEL_LONG_T=4 -DTESTS_SIZEOF_LONG=4 -Wall -Wempty-body >> -Wformat-security -Wignored-qualifiers -Wimplicit-fallthrough=5 -Winit-self >> -Wlogical-op -Wmissing-parameter-type -Wnested-externs >> -Wold-style-declaration -Wold-style-definition -Wsign-compare -Wtype-limits >> -Wwrite-strings -O -fno-omit-frame-pointer -g -feliminate-unused-debug-types >> -fdebug-prefix-map=/OE/webos/build/build-webos-master/BUILD/work/raspberrypi3-webos-linux-gnueabi/strace/4.22-r0=/usr/src/debug/strace/4.22-r0 >> -fdebug-prefix-map=/OE/ webos/build/build-webos-master/BUILD/work/raspberrypi3-webos-linux-gnueabi/strace/4.22-r0/recipe-sysroot= -fdebug-prefix-map=/OE/webos/build/build-webos-master/BUILD/work/raspberrypi3-webos-linux-gnueabi/strace/4.22-r0/recipe-sysroot-native= -pipe -c -o inject-nf.o ../../strace-4.22/tests/inject-nf.c -fomit-frame-pointer >> >> This might come from: >> meta/conf/bitbake.conf:DEBUG_OPTIMIZATION = "-O -fno-omit-frame-pointer >> ${DEBUG_FLAGS} -pipe" >> because in this build I had DEBUG_BUILD enabled. >> >> Will retest with 4.20 version + DEBUG_BUILD to see if it fails there as well >> now. > > 4.20 doesn't fail with DEBUG_BUILD, because inject-nf.c test is new in > 4.22: > > https://github.com/strace/strace/commit/58598cd7f6e23e531d71bfe5a4e35f898a4f3b2d#diff-dc01d20c1e55f8adf7536cb46d4481e1 > > What is preferred fix for this? Is adding -fomit-frame-pointer to CFLAGS > when ptest is in DISTRO_FEATURES acceptable solution?
I would say unconditionally adding -fomit-frame-pointer to CFLAGS for all builds is OK (strace is a debug tool - not something that generally needs to be debugged and frame pointers aren't essential for debugging anyway). -- _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
