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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