[Bug bootstrap/19481] New: libgfortran doesn't build -- configure doesn't handle cabs() well

[Bug bootstrap/19481] New: libgfortran doesn't build -- configure doesn't handle cabs() well

[coudert at clipper dot ens dot fr]

This one is strange. On i686-mingw, compiling gfortran fails with:
../../../gcc/libgfortran/generated/exp_c8.c:38: error: conflicting types for 'cabs'
/mingw/include/math.h:223: error: previous declaration of 'cabs' was here
make[2]: *** [exp_c8.lo] Error 1
make[2]: Leaving directory `/home/coudert/ibin/i686-pc-mingw32/libgfortran'
make[1]: *** [all] Error 2

I guess, somewhere in the configure process, the presence of cabs() in math.h
was not detected. This is not specific to i686-mingw, since the same thing
happens on mips-sgi-irix6.5 (which I reported as comment #7 in PR15266).

So, I submit a new PR (hope "component=bootstrap" was the right choice, not
sure) so that GNU build utils gurus can get this fixed. I am ready to give any
extra information needed, but I don't know what may be useful at that point.

PS: configure was a simple ../gcc/configure --prefix=/mingw --enable-languages=c,f95

-- 
           Summary: libgfortran doesn't build -- configure doesn't handle
                    cabs() well
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: coudert at clipper dot ens dot fr
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19481

[Bug libfortran/19481] libgfortran doesn't build -- configure doesn't handle cabs() well

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-01-17 15:15 -------
I will note this definitation of cbas is not compatible with C99.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|bootstrap                   |libfortran
 GCC target triplet|                            |i686-pc-mingw32
           Keywords|                            |build
            Version|unknown                     |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19481

[Bug libfortran/19481] libgfortran doesn't build -- configure doesn't handle cabs() well

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
OtherBugsDependingO|                            |16991
              nThis|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19481

[Bug libfortran/19481] libgfortran doesn't build -- configure doesn't handle cabs() well

[coudert at clipper dot ens dot fr]

------- Additional Comments From coudert at clipper dot ens dot fr  2005-01-17 17:09 -------
I worked around this bug, commenting a line in /mingw/include/math.h (I quote it
here for reference):
//_CRTIMP double __cdecl cabs (struct _complex);

The end of the compilation runs smoothly, but when I try to use gfortran, it
complains at link-time about missing symbol _ftruncate. Indeed, mingw doesn't
have a ftruncate (it has a chsize which has the same prototype and all), but the
libgfortran.a needs one (originally in unix.o). This can be worked around
(create an object file for ftruncate which call chsize directly and "ar -rv" it
into libgortran.a), but it should get fixed nonetheless.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19481

[Bug libfortran/19481] libgfortran doesn't build -- configure doesn't handle cabs() well

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-01 14:33 -------
(In reply to comment #2)
> I worked around this bug, commenting a line in /mingw/include/math.h (I quote it
> here for reference):
> //_CRTIMP double __cdecl cabs (struct _complex);
> 
> The end of the compilation runs smoothly, but when I try to use gfortran, it
> complains at link-time about missing symbol _ftruncate. Indeed, mingw doesn't
> have a ftruncate (it has a chsize which has the same prototype and all), but the

The ftruncate problem should be fixed now.

Does this work fully or is cabs issue still there?

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19481

[Bug libfortran/19481] libgfortran doesn't build -- configure doesn't handle cabs() well

[fxcoudert at gcc dot gnu dot org]

------- Additional Comments From fxcoudert at gcc dot gnu dot org  2005-05-02 07:42 -------
cabs issue is still here. Will look into it when I have time.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19481

[Bug libfortran/19481] libgfortran doesn't build -- configure doesn't handle cabs() well

[giovannibajo at libero dot it]

------- Additional Comments From giovannibajo at libero dot it  2005-05-31 16:58 -------
Then, confirmed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2005-05-31 16:58:48
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19481

[Bug libfortran/19481] libgfortran doesn't build -- configure doesn't handle cabs() well

[fxcoudert at gcc dot gnu dot org]

------- Additional Comments From fxcoudert at gcc dot gnu dot org  2005-09-05 10:37 -------
It looks like this issue with cabs declaration is fixed now, with an up-to-date
mingw. Closing the PR.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19481

[Bug libfortran/19481] libgfortran doesn't build -- configure doesn't handle cabs() well

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.0.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19481