Re: [Tinycc-devel] tcc shared libraries with gcc programs

[grischka]

Rob Heatherly wrote:
> tcc -Wall -Wunsupported -bench -shared -soname libyLOG.so.1 -o
> libyLOG.so.1.0  -lrt  yLOG.c
>
> It performs as expected when my main program is compiled with tcc, but
> when that same main program is complied with gcc I get the following
> when linking...
>
> libyLOG.so: file not recognized: File format not recognized
>
> When I recompile the yLOG library with the tcc "-g" flag, the main gcc
> program compiles/links to it with no problem.  Small, but maybe
> confusing deal.  Am I missing or doing something classically stupid?

Indeed that looks confusing.  I tried this setup with a _very_
simple foo.so (with only one "hello world" type function) and it
seemed to work finr, regardless of -g. (using a gcc 4.3.2 on an
older ubuntu64 for the main program).

However I also tried that with libtcc.so as produced with
    ./configure --disable-static
and then running the result gave a lot of errors about relocations
out of range and then crashed.  Also regardless of -g.

Which suggests that there might be something wrong with tcc's
shared libraries on x86-64.  I can't tell what however.

One thing to note is that tcc does not support -fPIC while gcc
actually requires it for libtcc.so.  Maybe it has to do with
that, maybe not.

--- grischka