linking c and fortran in the same archive

[John (Eljay) Love-Jensen]

On 11/12/09 9:14 AM, "Jean-François MAUREL" <jfr.maurel@gmail.com> wrote:

> Hi every one,
> 
> I am a newcomer to gcc. I searched within documentation and mailing list
> archive but did not find anything useful for the following issue:
> I cannot link c and f object files when I provide a single archive file.
> I can do it only when I provide individual object files
> 
> Below are the details:
> 
> I can compile link and execute a test program containing a c program
> file and a fortran program file (see below) with following set of commands:
>  (Windows Vista MinGW gcc , gfortran 4.4.0 ):
> gcc -c main.c -omain.o -Wall
> gfortran -c sub.f -osub.o -Wall
> gcc *.o  -Wall -enable-stdcall-fixup -omain.exe
> 
> when I use the following commands I have an undefined reference error :
> gcc -c main.c -omain.o -Wall
> gfortran -c sub.f -osub.o -Wall
> ar -r libtotal.a main.o sub.o
> gcc -ltotal  -Wall -enable-stdcall-fixup -omain.exe -L.
> ./libtotal.a(main.o):main.c:(.text+0x6b): undefined reference to `test_@24'
> collect2: ld a retourné 1 code d'état d'exécution
> 
> gcc -ltotal  -Wall -enable-stdcall-fixup -omain.exe -L.
> Could someone tell what I am missing here?

What happens if you put your library dependencies in order?

gcc -Wall -enable-stdcall-fixup -o main.exe -L. -ltotal

The order is important.  The libraries are processed left-to-right.  At the
time of the -ltotal in your command-line, there is no outstanding symbols
from the *.o files (since there haven't been any *.o files).

Note:  *.o files are taken in their entirety, unlike the archive library.

Your linker may also have a switch to pull in all the parts in the archive
library, such as:

gcc -Wl,--whole-archive -ltotal -Wl,--no-whole-archive -Wall
-enable-stdcall-fixup -o main.exe -L.

HTH,
--Eljay