netpbm broken under xcode 4.4 -- clang problem

[pmetzger (Perry E. Metzger)]

It appears that clang lacks some of the intrinsics supplied by gcc, and that building netpbm under xcode 4.4 results in the following error message. This is rather important, as netpbm is a dependency of many packages.

/usr/bin/clang -c -I.  -Iimportinc -Iimportinc/netpbm -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_graphics_netpbm/netpbm/work/advanced/editor/pamflip  -DNDEBUG  -I/opt/local/include -O3 -arch x86_64    -o pamflip_sse.o pamflip_sse.c
pamflip_sse.c:136:39: error: use of unknown builtin '__builtin_ia32_pcmpeqb128' [-Wimplicit-function-declaration]
        register v16qi const compare =__builtin_ia32_pcmpeqb128(vReg,zero128);
                                      ^
pamflip_sse.c:136:30: error: initializing 'const v16qi' with an expression of incompatible type 'int'
        register v16qi const compare =__builtin_ia32_pcmpeqb128(vReg,zero128);
                             ^        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.
gnumake[2]: *** [pamflip_sse.o] Error 1
gnumake[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_graphics_netpbm/netpbm/work/advanced/editor/pamflip'

[nerdling (Jeremy Lavergne)]

OP believes that clang is missing an sse intrinsic from gcc.