[patch #7320] AX_BLAS: AC_CHECK_FUNC autocaching makes problems

[Jaroslav Hajek]

URL:
  <http://savannah.gnu.org/patch/?7320>

                 Summary: AX_BLAS: AC_CHECK_FUNC autocaching makes problems
                 Project: GNU Autoconf Archive
            Submitted by: highegg
            Submitted on: Mon 20 Sep 2010 06:31:45 AM GMT
                Priority: 5 - Normal
                  Status: None
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Hello,

In AX_BLAS, AC_CHECK_FUNC is used to check for SGEMM. The problem is that
AC_CHECK_FUNC autocaches its result, but the LIBS are being manipulated, so
the cache is not valid after the test and can fool subsequent tests. For a
real occurrence of the problem, see
https://savannah.gnu.org/bugs/index.php?31046

The attached patch replaces AC_CHECK_FUNC calls by AC_TRY_LINK_FUNC, which
does not autocache.






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File Attachments:


-------------------------------------------------------
Date: Mon 20 Sep 2010 06:31:45 AM GMT  Name:
0001-avoid-caching-issues-in-ax_blas.m4.patch  Size: 1kB   By: highegg

<http://savannah.gnu.org/patch/download.php?file_id=21505>

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