Revision 446955

Fix build on armv6. The -funsafe-math-optimizations flag in Clang (pulled in by
-ffast-math) is emitting references to the sincos() function which is not
implemented on versions of FreeBSD < 1200032. Workaround by adding
-fno-unsafe-math-optimizations to armv6 CFLAGS.

/bin/sh ../libtool  --tag=CC   --mode=link /nxb-bin/usr/bin/cc -D_THREAD_SAFE -pthread -O2 -pipe  -O3 -ffast-math -fstrict-aliasing -fomit-frame-pointer   -o bench bench-bench.o bench-hook.o bench-fftw-bench.o ../threads/libfftw3_threads.la ../libfftw3.la ../libbench2/libbench2.a  -lm
libtool: link: /nxb-bin/usr/bin/cc -D_THREAD_SAFE -pthread -O2 -pipe -O3 -ffast-math -fstrict-aliasing -fomit-frame-pointer -o .libs/bench bench-bench.o bench-hook.o bench-fftw-bench.o  ../threads/.libs/libfftw3_threads.so ../.libs/libfftw3.so ../libbench2/libbench2.a -lm -pthread -Wl,-rpath -Wl,/usr/local/lib
./libbench2/libbench2.a(verify-lib.o): In function `aphase_shift':
verify-lib.c:(.text+0x578): undefined reference to `sincos'
./libbench2/libbench2.a(verify-lib.o): In function `tf_shift':
verify-lib.c:(.text+0x13a0): undefined reference to `sincos'
verify-lib.c:(.text+0x16e4): undefined reference to `sincos'
cc: error: linker command failed with exit code 1 (use -v to see invocation)
gmake[3]: *** [Makefile:400: bench] Error 1
gmake[3]: Leaving directory '/wrkdirs/usr/ports/math/fftw3/work/fftw-3.3.6-pl2/tests'
gmake[2]: *** [Makefile:684: all-recursive] Error 1
gmake[2]: Leaving directory '/wrkdirs/usr/ports/math/fftw3/work/fftw-3.3.6-pl2'
gmake[1]: *** [Makefile:549: all] Error 2
gmake[1]: Leaving directory '/wrkdirs/usr/ports/math/fftw3/work/fftw-3.3.6-pl2'
*** Error code 1

PR:		220590
Submitted by:	jbeich