[MacPorts] #56298: duke3d: build fails on Intel due to use of -faltivec

[MacPorts]

#56298: duke3d: build fails on Intel due to use of -faltivec
------------------------+-------------------------
 Reporter:  ryandesign  |      Owner:  cooljeanius
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  duke3d
------------------------+-------------------------
 duke3d fails to build.

 On OS X 10.11:

 https://paste.macports.org/b9ef383ca46e

 {{{
 make[1]: Entering directory `/opt/local/var/macports/build
 /_Users_travis_build_macports_macports-
 ports_games_duke3d/duke3d/work/trunk/source/buildengine'
 gcc -c -o build.o build.c -DPLATFORM_MACOSX=1 -faltivec -mdynamic-no-pic
 -falign-loops=32 -falign-functions=32 -DUDP_NETWORKING=1  -DPLATFORM_UNIX
 -g -I/opt/local/include/SDL -D_GNU_SOURCE=1 -D_THREAD_SAFE -fno-strict-
 aliasing -fno-omit-frame-pointer -Wall -O3 -funsigned-char
 clang: warning: optimization flag '-falign-loops=32' is not supported
 clang: warning: optimization flag '-falign-functions=32' is not supported
 clang: error: invalid argument '-faltivec' only allowed with
 'ppc/ppc64/ppc64le'
 make[1]: *** [build.o] Error 1
 }}}

 On macOS 10.13:

 https://paste.macports.org/97062c73cdc2

 {{{
 make[1]: Entering directory `/opt/local/var/macports/build
 /_Users_travis_build_macports_macports-
 ports_games_duke3d/duke3d/work/trunk/source/buildengine'
 gcc -c -o build.o build.c -DPLATFORM_MACOSX=1 -faltivec -mdynamic-no-pic
 -falign-loops=32 -falign-functions=32 -DUDP_NETWORKING=1  -DPLATFORM_UNIX
 -g -I/opt/local/include/SDL -D_GNU_SOURCE=1 -D_THREAD_SAFE -fno-strict-
 aliasing -fno-omit-frame-pointer -Wall -O3 -funsigned-char
 clang: error: the clang compiler does not support 'faltivec', please use
 -maltivec and include altivec.h explicitly
 clang: warning: optimization flag '-falign-loops=32' is not supported
 [-Wignored-optimization-argument]
 clang: warning: optimization flag '-falign-functions=32' is not supported
 [-Wignored-optimization-argument]
 make[1]: *** [build.o] Error 1
 }}}

 The log also demonstrates that the port isn't UsingTheRightCompiler.

-- 
Ticket URL: <https://trac.macports.org/ticket/56298>
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