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List:       binutils-bugs
Subject:    [Bug ld/25593] New: --as-needed breaks DT_NEEDED order with linker plugin
From:       "rguenth at gcc dot gnu.org" <sourceware-bugzilla () sourceware ! org>
Date:       2020-02-24 12:18:24
Message-ID: bug-25593-70 () http ! sourceware ! org/bugzilla/
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https://sourceware.org/bugzilla/show_bug.cgi?id=25593

            Bug ID: 25593
           Summary: --as-needed breaks DT_NEEDED order with linker plugin
           Product: binutils
           Version: 2.33
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

echo 'void foo() {}' > libt.c
echo 'void foo(); int main() { foo(); }' > t.c
gcc -o libt.so -shared libt.c -Wl,-soname,libt.so -fPIC -flto
gcc -c t.c -flto
gcc -Wl,--as-needed t.o libt.so
readelf -d a.out | grep NEEDED
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [libt.so]

but libc has to come last so the program can use RTLD_NEXT to arrive at
symbols from libc.  Works fine with gold.

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