[Bug libfortran/30007] libgfortran doesn't build for sh-elf

["fxcoudert at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #4 from fxcoudert at gcc dot gnu dot org  2007-01-18 17:28 -------
So, the reduced code looks like this:

extern void bar (void);
extern __typeof(bar) bar __asm__("foo");
void bar (void) { ; }
extern __typeof(bar) gee __attribute__((__alias__("foo")));

Ian Lance Taylor gave me the solution on IRC, which is: on SH, all symbol names
are preprended an underscore, but in the above code __asm__("foo") does not
prepend it for us. The macro defined for this underscore (and other such
prefixes on other targets, although I don't any in particular) is
__USER_LABEL_PREFIX__, so the final fix is:

#define stringize(x) expand_macro(x)
#define expand_macro(x) # x

extern void bar (void);
extern __typeof(bar) bar __asm__(stringize(__USER_LABEL_PREFIX__) "foo");
void bar (void) { ; }
extern __typeof(bar) gee __attribute__((__alias__("foo")));


-- 

fxcoudert at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |fxcoudert at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2007-01-05 10:10:35         |2007-01-18 17:28:42
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30007