What is xmmintrin.h, and why aren't ports finding it?

[Dimitry Andric]

On 07 Nov 2014, at 04:36, Chris H <bsd-lists at bsdforge.com> wrote:
> 
> Greetings,
> Working on a recent 11-CURRENT install
> (11-CURRENT #1 amd64 r274134 Nov 5 12:56:14 PST 2014)
> svn info /usr/ports Revision: 372176
> 
> Given the above, and the fact that I have installed lang/gcc-48.
> Is there any reason that any port wanting to include xmmintrin.h
> fails to find it? Even though dmesg && messages reflects the fact
> that gcc48 is included within my $PATH?

What you have in your PATH does not matter.  The xmmintrin.h header
contains SSE intrinsics, and should automatically be found by your gcc
4.8 port.  Normally it is located in:

/usr/local/lib/gcc48/gcc/i386-portbld-freebsd11.0/4.8.4/include/xmmintrin.h

or if you have a slightly different gcc version, just run:

find /usr/local/lib/gcc48 -name xmmintrin.h

to find it.  If you run:

gcc48 -v -x c -c /dev/null -o /dev/null

it should show you the paths it searches for include files (look for the
"#include <...> search starts here:" line).  For example, on my system
this shows:

#include <...> search starts here:
 /usr/local/lib/gcc48/gcc/i386-portbld-freebsd11.0/4.8.4/include
 /usr/local/include
 /usr/local/lib/gcc48/gcc/i386-portbld-freebsd11.0/4.8.4/include-fixed
 /usr/include
End of search list.

The directory where you found xmmintrin.h should be listed in the search
directories.

-Dimitry