[Tinycc-devel] Major issue with current macos port. clang and tcc .o are not compatible

[Christian Jullien]

Hi All,

 

As suspected, I have a proof that current version does not allow to mix clang and tcc objects (which is of course a big issue).

The root of this issue is that a tcc .o is not a Mach-O but a ELF 64 object file.

After successfully compiled tcc here is my test:

 

--- foo.c

Int foo = 1;

 

--- main.c

#include <stdio.h>

extern int foo;

 

int

main() {

        printf("foo: %d\n", foo);

}

 

jullien@byas tinycc % clang -O3 -c foo.c -o foo-clang.o

jullien@byas tinycc % ./tcc -c foo.c -o foo-tcc.o

jullien@byas tinycc % ls -ls foo*o

8 -rw-r--r--  1 jullien  staff  420 Jun 23 06:53 foo-clang.o

8 -rw-r--r--  1 jullien  staff  660 Jun 23 06:54 foo-tcc.o

jullien@byas tinycc % file foo-clang.o

foo-clang.o: Mach-O 64-bit object x86_64

jullien@byas tinycc % file foo-tcc.o

foo-tcc.o: ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped

 

Obviously, foo-tcc.o is not seen as a Mach-O object file

 

Now

-          when linking with clang a tcc object:

       % clang main.c -o main foo-tcc.o && ./main

ld: warning: ignoring file foo-tcc.o, building for macOS-x86_64 but attempting to link with file built for unknown-unsupported file format ( 0x7F 0x45 0x4C 0x46 0x02 0x01 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 )

Undefined symbols for architecture x86_64:

  "_foo", referenced from:

      _main in main-fc9898.o

ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

 

-          when linking with tcc a clang object

% tcc main.c foo-clang.o

foo-clang.o: error: foo-clang.o: unrecognized file type 0