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Re: [Patch V2] libgfortran: do not assume libm
- From: Paolo Bonzini <pbonzini at redhat dot com>
- To: Tristan Gingold <gingold at adacore dot com>
- Cc: Tobias Burnus <tobias dot burnus at physik dot fu-berlin dot de>, GCC Patches <gcc-patches at gcc dot gnu dot org>, fortran at gcc dot gnu dot org, Ralf Corsepius <ralf dot corsepius at rtems dot org>, jb at gcc dot gnu dot org
- Date: Thu, 22 Mar 2012 11:06:07 +0100
- Subject: Re: [Patch V2] libgfortran: do not assume libm
- References: <20120320094857.GB27039@physik.fu-berlin.de> <BB208731-93A2-45B4-95C4-C8179CB4FAC3@adacore.com>
Il 22/03/2012 09:30, Tristan Gingold ha scritto:
> Hi,
>
> this is version 2 of the patch.
>
> The initial problem is that libgfortran configure.ac used AC_CHECK_LIB([m]…) to check wether several math functions are available. That doesn't work on VMS, because there is no such things as a libm.
>
> It seems to me that there are no autoconf macro to check wether a function is available: AC_CHECK_FUNC[S] don't allow to specify additional include files (necessary on VMS as some math functions are renamed through macros), and AC_CHECK_DECL only checks the presence of the declaration (as pointed out by Ralf).
>
> So I have finally learnt a little bit more about autoconf and added a new file: config/math.m4 (build machinery maintainer cc:)
> libgfortran/configure.ac now uses the new GCC_CHECK_MATH_FUNC macro.
>
> Bootstrapped without gfortran regressions on x86_64-darwin.
>
> Ok for trunk ?
>
> (I will submit a follow-up change in libquadmath once this change is approved).
>
> Tristan.
>
> config/
> 2012-03-22 Tristan Gingold <gingold@adacore.com>
>
> * math.m4: New file.
>
> libgfortran/
> 2012-03-22 Tristan Gingold <gingold@adacore.com>
>
> * configure.ac: Use GCC_CHECK_MATH_FUNC for math functions.
> * acinclude.m4: Include ../config/math.m4
> * configure: Regenerate.
> * Makefile.in: Regenerate.
Ok.