Re: Bug#888478: systemd FTBFS on mipsel: /usr/bin/ld: BFD (GNU Binutils for Debian) 2.29.90.20180122 assertion fail ../../bfd/elflink.c:9757

Aurelien Jarno <[email protected]> Fri, 26 Jan 2018 16:38:34 +0100

Newsgroups	gmane.linux.debian.ports.mips
Message-ID	<[email protected]>

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 [email protected] 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 [email protected] 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

Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
[email protected]                 http://www.aurel32.net

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