[Bug ld/27837] New: Consider allowing mix of -r / --relax by ignoring --relax.

[slyfox at inbox dot ru]

https://sourceware.org/bugzilla/show_bug.cgi?id=27837

            Bug ID: 27837
           Summary: Consider allowing mix of -r / --relax by ignoring
                    --relax.
           Product: binutils
           Version: 2.36.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: slyfox at inbox dot ru
  Target Milestone: ---

This is a forward of https://bugs.gentoo.org/788901 bug by Petr Šabata.

Petr uses LDFLAGS+=-Wl,--relax system-wide. glibc (and ghc) occasionally use
`ld -r` for partial linking (and apply $LDFLAGS for it). binutils does not
allow such a mix:

  $ touch a.c
  $ LANG=C h gcc -Wl,--relax -r a.c -o a
 
/usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/../../../../x86_64-pc-linux-gnu/bin/ld:
--relax and -r may not be used together
  collect2: error: ld returned 1 exit status

Our options are to:
1. Filter out -Wl,--relax flag downstream and don't pass it to glibc
2. Tweak glibc to pass -Wl,--no-relax in `ld -r` contexts

I wonder if binutils could ignore -Wl,--relax altogether for partial linking.

Thank you!

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