afni tries to compile wrong architecture

[frenchja@…]

--->  Computing dependencies for afni
--->  Building afni
( cd niml/ ; make all 'CC=cc -march=pentium-m -mtune=prescott -DDARWIN  -Wcomment -Wformat -DUSE_TRACING -DHAVE_XDBE -no-cpp-precomp -DDONT_USE_MCW_MALLOC -O' ; /bin/mv -f *.o .. ; )
( cd niml/ ; make all 'CC=cc -march=pentium-m -mtune=prescott -DDARWIN  -Wcomment -Wformat -DUSE_TRACING -DHAVE_XDBE -no-cpp-precomp -DDONT_USE_MCW_MALLOC -O' ; /bin/mv -f *.o .. ; )
cc -march=pentium-m -mtune=prescott -DDARWIN  -Wcomment -Wformat -DUSE_TRACING -DHAVE_XDBE -no-cpp-precomp -DDONT_USE_MCW_MALLOC -O -c niml_b64.c
cc -march=pentium-m -mtune=prescott -DDARWIN  -Wcomment -Wformat -DUSE_TRACING -DHAVE_XDBE -no-cpp-precomp -DDONT_USE_MCW_MALLOC -O -c niml_b64.c
niml_b64.c:1: error: CPU you selected does not support x86-64 instruction set
niml_b64.c:1: error: CPU you selected does not support x86-64 instruction set
niml_b64.c:1: error: CPU you selected does not support x86-64 instruction set
niml_b64.c:1: error: CPU you selected does not support x86-64 instruction set
make[1]: *** [niml_b64.o] Error 1
make[1]: *** [niml_b64.o] Error 1
mv: rename *.o to ../*.omv: rename *.o to ../*.o: No such file or directory
: No such file or directory
make: *** [niml_element.o] Error 1
make: *** Waiting for unfinished jobs....
make: *** [niml_b64.o] Error 1
Warning: the following items did not execute (for afni): org.macports.activate org.macports.build org.macports.destroot org.macports.install
To report a bug, see <http://guide.macports.org/#project.tickets>

[frenchja@…]

Debug.txt