[Bug 235896] Clang 6.0.1 passes incorrect parameters to ld when build shared object

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235896

            Bug ID: 235896
           Summary: Clang 6.0.1 passes incorrect parameters to ld when
                    build shared object
           Product: Base System
           Version: 12.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: bugs at FreeBSD.org
          Reporter: jguojun at gmail.com

"-Wl,-r " is a compiler switch to pass linker option "-r" for building shared
objects, and this should work for all CC and GCC compilers on different Unix
platforms.
This works prior to Clang 6.0.1 and FreeBSD 12-R, but failed on FreeBSD 12-R
with Clang 6.0.1.

Below steps can easily reproduce the problem. Directly use ld to link a shared
object works no issue for a shared object [step 3,4], but cc (Clang 6.0.1)
"-Wl,-r" command failed to do so [step 5].


[1] FBSD120: cat << CLANG60_TEST_CASE > test-clang6.c
#include <stdio.h>

int anyFunc(int a, int b)
{
        printf("a = %d b = %d\n", a, b);
        return a * b;
}
CLANG60_TEST_CASE

[2] FBSD120: cc -c -o test.o -fPIC test-clang6.c

[3] FBSD120: ld -r -o test.so test.o
[4] FBSD120: ld -r -o test.so test.o -v
LLD 6.0.1 (FreeBSD 335540-1200005) (compatible with GNU linkers)

[5] FBSD120: cc -Wl,-r -o test.so test.o -v
FreeBSD clang version 6.0.1 (tags/RELEASE_601/final 335540) (based on LLVM
6.0.1
)
Target: x86_64-unknown-freebsd12.0
Thread model: posix
InstalledDir: /usr/bin
 "/usr/bin/ld" --eh-frame-hdr -dynamic-linker /libexec/ld-elf.so.1
--hash-style=
both --enable-new-dtags -o test.so /usr/lib/crt1.o /usr/lib/crti.o
/usr/lib/crtb
egin.o -L/usr/lib -r test.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc
-
-as-needed -lgcc_s --no-as-needed /usr/lib/crtend.o /usr/lib/crtn.o
/usr/bin/ld: error: attempted static link of dynamic object
/usr/lib/libgcc_s.so
/usr/bin/ld: error: attempted static link of dynamic object
/usr/lib/libgcc_s.so
cc: error: linker command failed with exit code 1 (use -v to see invocation)

-- 
You are receiving this mail because:
You are the assignee for the bug.