ports/164919: www/seamonkey fails to build on pre-SSE2 processor

[Volodymyr Kostyrko]

>Number:         164919
>Category:       ports
>Synopsis:       www/seamonkey fails to build on pre-SSE2 processor
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Feb 08 23:50:09 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Volodymyr Kostyrko
>Release:        RELENG_9
>Organization:
None
>Environment:
FreeBSD limbo.lan 9.0-STABLE FreeBSD 9.0-STABLE #0 r231102: Tue Feb  7 09:22:05 EET 2012     arcade at limbo.lan:/usr/obj/usr/src/sys/MINIMALx32  i386
>Description:
Building port will give:

nsUTF8UtilsSSE2.cpp
clang++ -o nsUTF8UtilsSSE2.o -c  -fvisibility=hidden -DMOZILLA_INTERNAL_API -DMOZ_SUITE=1 -DOSTYPE=\"FreeBSD9\" -DOSARCH=FreeBSD -D_IMPL_NS_COM 
 -I. -I. -I../../../dist/include -I../../../dist/include/nsprpub  -I/usr/local/include/nspr -I/tmp/ports/usr/ports/www/seamonkey/work/comm-relea
se/mozilla/dist/include/nss      -fPIC -I/usr/local/include/cairo     -I/usr/local/include -fno-rtti -Wall -Wpointer-arith -Woverloaded-virtual 
-Wsynth -Wno-ctor-dtor-privacy -Wno-non-virtual-dtor -Wno-invalid-offsetof -Wno-variadic-macros -Werror=return-type -O2 -pipe -O2 -fno-strict-al
iasing -fno-exceptions -fno-strict-aliasing -fshort-wchar -ffunction-sections -fdata-sections -pipe  -DNDEBUG -DTRIMMED -O2 -fomit-frame-pointer
 -msse2  -I/usr/local/include/cairo     -I/usr/local/include -DMOZILLA_CLIENT -include ../../../mozilla-config.h /tmp/ports/usr/ports/www/seamon
key/work/comm-release/mozilla/xpcom/string/src/nsUTF8UtilsSSE2.cpp
In file included from /tmp/ports/usr/ports/www/seamonkey/work/comm-release/mozilla/xpcom/string/src/nsUTF8UtilsSSE2.cpp:3:
In file included from /usr/include/clang/3.0/emmintrin.h:31:
In file included from /usr/include/clang/3.0/xmmintrin.h:31:
/usr/include/clang/3.0/mmintrin.h:28:2: error: #error "MMX instruction set not enabled"
#error "MMX instruction set not enabled"
 ^

I'll attach non-clang build logs soon.
>How-To-Repeat:

>Fix:
I think mail/thunderbird and www/firefox already fixed this one somehow...

>Release-Note:
>Audit-Trail:
>Unformatted: