For newer gcc attributes, we can use __has_attribute() to test for
attribute presence. This improves compatibility both with older gcc
and with clang, at least with -Werror enabled.
Reported-by: Daniel Lundqvist <daniel@malarhojden.nu>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Instead of trying to do hacks in the Makefiles, define header files
for specific compilers if they can't use autoconf. Currently defined
for Microsoft Visual Studio, based on MSDN documentation. It is
currently untested.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Make the source code easier to understand and keep track of by
organizing it into subdirectories depending on the function.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
