I tried to build Sage 4.1.1 with Sun's compiler suite (Sun Studio 12
update 1 to be precise).
The Sun compilers are more fussy than gcc, and will reject code that gcc
accepts. One such big of code is below.
void
gcry_md_hash_buffer (int algo, void *digest,
const void *buffer, size_t length)
{
return _gcry_md_hash_buffer (algo, digest, buffer, length);
}
Clearly the function is declared as void, so nothing should be returned
by it. gcc 4.4.1 does not throw this as an error, but Sun Studio 12
update 1 does. Hence this code (and a bit similar) stops Sage building
with Sun Studio on Solaris.
Looking at the latest source code for libgcrypt, I can see the code has
been changed so the function _gcry_md_hash_buffer is executed, but there
is no attempt to return the value. When I changed the code in Sage, just
removing the 'return', so libgcrypt builds ok on Solaris with the Sun
Studio compiler suite.
Please see http://sagetrac.org/sage_trac/ticket/6758 for more information.
I have implemented a fix to the C source code, and made some changes to
spkg-install, as it suffers some problems. Specific issues were
* If SAGE64 was set to 'yes' a 64-bit build was only attempted on
Darwin, when clearly it should be done on every platform.
* set -e is added, to check for errors more carefully.
* Debugging information was always added. Now the default is to add it,
but it is possible to build without it, by setting an environment variable
* The variable FC and F77 are both set to SAGE_FORTRAN. This means that
when the configure script tests the Fortran compiler, it tests the one
that SAGE_FORTRAN is set to, and not some other version. No Fortran is
actually used, but the configure script checks it and says the GNU
compiler is being used, which is a bit dumb if SAGE_FORTRAN was set to a
non-GNU Fortran compiler.
See the revised spkg-install at
http://sage.math.washington.edu/home/kirkby/Solaris-fixes/libgcrypt-1.4.3.p2/spkg-install
See all the files at
http://sage.math.washington.edu/home/kirkby/Solaris-fixes/libgcrypt-1.4.3.p2/
Dave
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