#8277: i686 build target fails test on x86_64 toolchain
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Reporter: kwizart | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Summary of the bug: Building for x86 32bit fails using a x86_64 gcc
toolchain
How to reproduce:
{{{
I'm trying to build ffmpeg for x86 32bit using the following flags:
--arch=i686 --optflags='\''-O2 -g -pipe -Wall -Werror=format-security
-Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-
protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-
hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m32
-march=i686 -mtune=generic -msse2 -mfpmath=sse -mstackrealign
-fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection'\''
--extra-ldflags='\''-Wl,-z,relro -Wl,--as-needed -Wl,-z,now
-specs=/usr/lib/rpm/redhat/redhat-hardened-ld '\'' --extra-cflags='\''
'\'' -
The compiler is x86_64 (on a Fedora 31 userspace).
The needed devel packages are installed as i686 (specially glibc-
devel.i686)
Unfortunately the ./configure script is failing with:
test_cc
BEGIN /tmp/ffconf.i01hvFDS/test.c
1 int main(void){ return 0; }
END /tmp/ffconf.i01hvFDS/test.c
gcc -march=i686 -c -o /tmp/ffconf.i01hvFDS/test.o
/tmp/ffconf.i01hvFDS/test.c
cc1: error: CPU you selected does not support x86-64 instruction set
C compiler test failed.
This is because the configure test is not passing the -m32 flag while
testing to produce a binary.
Using -m32 on the compilation line allows to produce a valid test.o
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8277>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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