On Tue, 29 Jun 2010, Wesley Smith wrote:
What's the appropriate way to determine 32 v. 64 bit compilation? I've looked into using: AC_CANONICAL_BUILD with the $build_cpu $build_vendor $build_os variables, but it doesn't give the right info (in my case i686 pc linux-gnu). I'm essentially looking for something in autoconf land equivalent to:
It is much more useful and reliable to test the size of the relevant types. For example, my package includes tests like this in configure.ac:
# Obtain size of a 'unsigned long' and define as SIZEOF_UNSIGNED_LONG AC_CHECK_SIZEOF(unsigned long) # Obtain size of size_t and define as SIZEOF_SIZE_T AC_CHECK_SIZEOF(size_t) # Obtain size of an unsigned int pointer and define as SIZEOF_UNSIGNED_INTP AC_CHECK_SIZEOF(unsigned int*) Bob -- Bob Friesenhahn bfriesen@xxxxxxxxxxxxxxxxxxx, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
