Re: problem linking Objective-C program with gcc-4.0

Stéphane Goujet <stephane.goujet@xxxxxx> · Fri, 18 Feb 2005 16:35:36 +0200

I answer to myself :

With gcc -v, I can see :

  Let's name an Objective-C program main.m :
 > gcc main.m -lobjc
...works fine.

collect2 is called with libraries : -lobjc -lgcc_s -lgcc -lc

  If we name the very same program main.c :
 > gcc -x objective-c main.c -lobjc

collect2 is called with libraries : -lobjc -lgcc_eh -lgcc -lc

So, if I add now this libgcc_s :

>gcc -x objective-c main.c -lobjc -lgcc_s
... works fine !

  What are those libraries (libgcc_s, libgcc_eh) ?

  Why does gcc try to link with different libraries just because the 
file extension is different ?

  Why does now (4.0.0) libgcc_eh depend on libgcc_s ? (This is not the 
case with a gcc-3.4.x).

Goodbye,
         Stéphane Goujet.