Add FFTW builder

F/FFTW/build_tarballs.jl

@@ -0,0 +1,55 @@
+using BinaryBuilder
+
+# Collection of sources required to build ZMQ
+sources = [
+    "http://fftw.org/~stevenj/fftw-3.3.9-alpha1.tar.gz" =>
+    "3db033dbc8a703ed644e6973d82bf0497a15a77dc071a4391cfb844b119e7b4c",
+]
+
+# Bash recipe for building across all platforms
+script = raw"""
+cd $WORKSPACE/srcdir/fftw-3.3.9-alpha1
+config="--prefix=$prefix --host=${target} --enable-shared --disable-static --disable-fortran --disable-mpi --disable-doc --enable-threads --with-combined-threads"
+if [[ $target == x86_64-*  ]] || [[ $target == i686-* ]]; then config="$config --enable-sse2 --enable-avx2"; fi
+# todo: --enable-avx512 on x86_64?
+# Neon is no longer available on BinaryBuilder?
+# if [[ $target == aarch64-* ]]; then
+#    config="$config --enable-neon"
+#    CC="${CC} -mfpu=neon"
+# fi
+if [[ $target == *-w64-* ]]; then config="$config --with-our-malloc"; fi
+if [[ $target == i686-w64-* ]]; then config="$config --with-incoming-stack-boundary=2"; fi
+# work around GNU binutils problem on MacOS (see PR #1)
+if [[ ${target} == *darwin* ]]; then
+    export RANLIB=llvm-ranlib
+fi
+mkdir double && cd double
+../configure $config
+perl -pi -e "s/tools m4/m4/" Makefile # work around FFTW/fftw3#146
+make -j${nprocs}
+make install
+cd ..
+if [[ $target == powerpc64le-*  ]]; then config="$config --enable-altivec"; fi
+mkdir single && cd single
+../configure $config --enable-single
+perl -pi -e "s/tools m4/m4/" Makefile # work around FFTW/fftw3#146
+make -j${nprocs}
+make install
+"""
+
+# These are the platforms we will build for by default, unless further
+# platforms are passed in on the command line
+platforms = supported_platforms() # build on all supported platforms
+
+# The products that we will ensure are always built
+products(prefix) = [
+    LibraryProduct(prefix, "libfftw3", :libfftw3),
+    LibraryProduct(prefix, "libfftw3f", :libfftw3f),
+]
+
+# Dependencies that must be installed before this package can be built
+dependencies = [
+]
+
+# Build the tarballs, and possibly a `build.jl` as well.
+build_tarballs(ARGS, "FFTW", v"3.3.9-alpha1", sources, script, platforms, products, dependencies)