detecting non-PIC in shared lib on Darwin?

[Andrew Haley]

Jack Howarth writes:

 >     What on earth would make you think that the linker on Darwin
 > would reject non-PIC code in linking a shared library. The linker
 > on Linux doesn't do any such thing (hence the discussion on the
 > Debian mailing list of adopting this as check on their builds).

x86 is special.  On x86 it's somewhat possible to build shared
libraries without PIC, but it's a really bad idea.  On other arches,
PIC is compulsory.  So:


[aph@zorro ~]$ /usr/bin/gcc -m32 -shared -o client.so client.c
[aph@zorro ~]$ /usr/bin/gcc -m64 -shared -o client.so client.c
/usr/bin/ld: /tmp/ccaXMxyb.o: relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC

But please, take this to binutils.

Andrew.