https://sourceware.org/bugzilla/show_bug.cgi?id=23350
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |WAITING
--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Martin Liska from comment #3)
> So still present, shows here:
>
> $ cat main.i
> int wrl;
>
> $ cat lib.i
> int wrl;
> void a() {}
>
> $ gcc -c -flto main.i && gcc -c -flto lib.i && ar rusc lib.a lib.o
> $ gcc main.o lib.a lib.a
> lto1: fatal error: multiple prevailing defs for ‘a’
> compilation terminated.
> lto-wrapper: fatal error: gcc returned 1 exit status
> compilation terminated.
> /usr/lib64/gcc/x86_64-suse-linux/8/../../../../x86_64-suse-linux/bin/ld:
> error: lto-wrapper failed
> collect2: error: ld returned 1 exit status
>
Linker checks lib.a to see if there is a non-COMMON definition for
wrl. But linker never includes lib.o in the final link. What makes
lto1 believe that lib.o is needed?
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