Control: forwarded -1 https://sourceware.org/bugzilla/show_bug.cgi?id=22751 Control: retitle -1 binutils: lto broken for libgcc libcalls Hi, On 26/01/18 15:38, Aurelien Jarno wrote: > On 2018-01-26 15:19, James Cowgill wrote: >> Hi, >> >> On 26/01/18 08:57, Aurelien Jarno wrote: >>>> The build was performed on eller.d.o. >>>> >>>> If you reassign to binutils, please set affects. >>>> >>>> I put d-mips@l.d.o into X-Debbugs-Cc. During cross builds I was able to >>>> reproduce a very similar build failure for mips and armhf. A native >>>> build on amd64 seems unaffected. Thus I have included d-arm@l.d.o as >>>> well. >>> >>> Note that the build also fails on i386 on the same files, but in a >>> different way: >>> >>> | FAILED: test-ipv4ll >>> | cc -o test-ipv4ll 'test-ipv4ll@exe/src_libsystemd-network_test-ipv4ll.c.o' -flto -Wl,--no-undefined -Wl,--as-needed -Wl,-z,relro -Wl,-z,now -pie -Wl,--gc-sections -g -O2 -fdebug-prefix-map=/tmp/systemd-236=. -fstack-protector-strong -Wformat -Werror=format-security -Wl,-z,relro -Wl,--start-group src/shared/libsystemd-shared-236.so src/libsystemd-network/libsystemd-network.a -Wl,--end-group '-Wl,-rpath,$ORIGIN/src/shared' -Wl,-rpath-link,/tmp/systemd-236/build-deb/src/shared >>> | /usr/bin/ld: /tmp/ccFNIZSq.ltrans0.ltrans.o(.text+0x99f): unresolvable R_386_PLT32 relocation against symbol `__umoddi3' >>> | /usr/bin/ld: final link failed: Nonrepresentable section on output >>> | collect2: error: ld returned 1 exit status >>> >>> That might help debugging the issue as it is more understandable than >>> a simple assert. >> >> Fairly minimal testcase which triggers both bugs: >> >> test.c: >> volatile unsigned long long a = 42; >> volatile unsigned long long b = 1; >> >> int main(void) >> { >> return (int) (a / b); >> } >> >> build with: >> gcc -flto -O2 -c test.c >> ar rcs libtest.a test.o >> gcc -flto -Wl,--whole-archive libtest.a -Wl,--no-whole-archive >> >> On mipsel: >> /usr/bin/ld: BFD (GNU Binutils for Debian) 2.29.90.20180122 assertion fail ../../bfd/elflink.c:9757 >> collect2: error: ld returned 1 exit status >> >> On i386: >> /usr/bin/ld: /tmp/cc5ZOEfW.ltrans0.ltrans.o(.text.startup+0x3d): unresolvable R_386_PLT32 relocation against symbol `__udivdi3' >> /usr/bin/ld: final link failed: Nonrepresentable section on output >> collect2: error: ld returned 1 exit status > > Thanks for the reduced testcase. It means it can also be easily > reproduced on amd64 with the following command but slightly different > code: > > volatile __int128 a = 42; > volatile __int128 b = 1; > > int main(void) > { > return (int) (a / b); > } > > /usr/bin/ld: /tmp/ccwdC3bA.ltrans0.ltrans.o(.text.startup+0x21): unresolvable R_X86_64_PLT32 relocation against symbol `__divti3' > /usr/bin/ld: final link failed: Nonrepresentable section on output Thanks for that. I've submitted an upstream bug and bisected it for them. I've guessed a bug title which is hopefully more accurate (since this is not mipsel specific). James
Attachment:
signature.asc
Description: OpenPGP digital signature