[Bug gold/24415] New: - -Wl,--wrap= incompatible with -flto

[dilyan.palauzov at aegee dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=24415

            Bug ID: 24415
           Summary: - -Wl,--wrap= incompatible with -flto
           Product: binutils
           Version: 2.33 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gold
          Assignee: ccoutant at gmail dot com
          Reporter: dilyan.palauzov at aegee dot org
                CC: ian at airs dot com
  Target Milestone: ---

This is t.c:
---------------
#include <stdio.h>
#include <unistd.h>

ssize_t __wrap_read(int fd, void *buffer, size_t count) {
  printf("%s\n", (char*)buffer);
  return fd + count; 
}


int main() {
  int i = read(1, "abc", 5);
  printf("%i\n", i);
}
---------------
I have gcc 8.3.1 20190331, clang 8.0.0, lld 8.0.0, ld.bfd 2.32.51.20190401 with
the patch from https://sourceware.org/ml/binutils/2019-04/msg00011.html, and
ld.gold (GNU Binutils 2.32.51.20190319) 1.16.

This works (compiles and links):

clang t.c -Wl,--wrap=read -O3 -fuse-ld=lld  -flto 
clang t.c -Wl,--wrap=read -O2 -fuse-ld=lld  -flto 
clang t.c -Wl,--wrap=read -O1 -fuse-ld=lld  -flto 
clang t.c -Wl,--wrap=read -O1 -fuse-ld=bfd  -flto 
clang t.c -Wl,--wrap=read -O2 -fuse-ld=bfd  -flto 
clang t.c -Wl,--wrap=read -O3 -fuse-ld=bfd  -flto 
clang t.c -Wl,--wrap=read -O3 -fuse-ld=gold -flto 
clang t.c -Wl,--wrap=read -O2 -fuse-ld=gold -flto 
clang t.c -Wl,--wrap=read -O1 -fuse-ld=gold -flto
gcc   t.c -Wl,--wrap=read -O3 -fuse-ld=bfd  -flto 
gcc   t.c -Wl,--wrap=read -O2 -fuse-ld=bfd  -flto 
gcc   t.c -Wl,--wrap=read -O1 -fuse-ld=bfd  -flto

This does not work (does not link):
gcc   t.c -Wl,--wrap=read -O1 -fuse-ld=gold  -flto
gcc   t.c -Wl,--wrap=read -O2 -fuse-ld=gold  -flto
gcc   t.c -Wl,--wrap=read -O3 -fuse-ld=gold  -flto

Bug for ld.bfd:
https://sourceware.org/bugzilla/show_bug.cgi?id=24406
Bug for GCC:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88643 (origin)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89930 (duplicate)

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