Add native Linux support.

Author: jayfoad

Makefile

@@ -1,6 +1,6 @@
 VPATH := ../lapack/SRC:../lapack/BLAS/SRC:../lapack/INSTALL
 
-FFLAGS := -O2
+FFLAGS := -fPIC -O2
 
 SRCS := \
 	daxpy.f \
@@ -194,13 +194,11 @@ SRCS := \
 
 OBJS := $(patsubst %.f,%.o,$(SRCS))
 
-# See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46539#c3
-LDFLAGS := -shared -static-libgcc
-LDLIBS := -Wl,-Bstatic -lgfortran -lquadmath -Wl,-Bdynamic -lm
+LDFLAGS += -shared
 
-lapack.dll: $(OBJS)
+$(LAPACKLIB): $(OBJS)
 	$(LINK.c) $^ $(LDLIBS) -o $@
 
 %.o: ../lapack/%.f
 	@mkdir -p $(dir $@)
-	$(COMPILE.f) $(OUTPUT_OPTION) $<
+	$(COMPILE.f) -fPIC $(OUTPUT_OPTION) $<

Makefile.lapack

@@ -0,0 +1,33 @@
+ZIPFILE := Math-linux.zip
+DLLS := build-linux-fftw32/fftw32.so build-linux-fftw64/fftw64.so build-linux-lapack32/lapack32.so build-linux-lapack64/lapack64.so
+
+export LDLIBS := -lgfortran
+
+$(ZIPFILE): Math.dyalog $(DLLS)
+	zip -j $@ $^
+
+build-linux-fftw32/Makefile: | build-linux-fftw32
+	cd build-linux-fftw32 && ../fftw/configure --enable-shared --disable-static --enable-sse2 --enable-avx CC="gcc -m32" && $(MAKE)
+
+build-linux-fftw32/fftw32.so: build-linux-fftw32/Makefile
+	$(MAKE) -C build-linux-fftw32
+	cp build-linux-fftw32/.libs/libfftw3.so $@
+
+build-linux-fftw64/Makefile: | build-linux-fftw64
+	cd build-linux-fftw64 && ../fftw/configure --enable-shared --disable-static --enable-sse2 --enable-avx CC="gcc -m64"
+
+build-linux-fftw64/fftw64.so: build-linux-fftw64/Makefile
+	$(MAKE) -C build-linux-fftw64
+	cp build-linux-fftw64/.libs/libfftw3.so $@
+
+build-linux-lapack32/lapack32.so: | build-linux-lapack32
+	$(MAKE) -C build-linux-lapack32 -f ../Makefile.lapack CC="gcc -m32" FC="gfortran -m32" LAPACKLIB=$(notdir $@)
+
+build-linux-lapack64/lapack64.so: | build-linux-lapack64
+	$(MAKE) -C build-linux-lapack64 -f ../Makefile.lapack CC="gcc -m64" FC="gfortran -m64" LAPACKLIB=$(notdir $@)
+
+build-linux-%:
+	mkdir $@
+
+clean:
+	rm -rf $(ZIPFILE) build-linux-*

Makefile.linux

@@ -0,0 +1,36 @@
+ZIPFILE := Math-windows.zip
+
+DLLS := build-windows-fftw32/fftw32.dll build-windows-fftw64/fftw64.dll build-windows-lapack32/lapack32.dll build-windows-lapack64/lapack64.dll
+
+# See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46539#c3
+export LDFLAGS := -static-libgcc
+export LDLIBS := -Wl,-Bstatic -lgfortran -lquadmath -Wl,-Bdynamic -lm
+
+$(ZIPFILE): Math.dyalog $(DLLS)
+	zip -j $@ $^
+
+build-windows-fftw32/Makefile: | build-windows-fftw32
+	cd build-windows-fftw32 && ../fftw/configure --host=mingw32 --disable-alloca --with-our-malloc16 --with-windows-f77-mangling --enable-shared --disable-static --with-incoming-stack-boundary=2 --enable-sse2 --enable-avx CC=i686-w64-mingw32-gcc
+
+build-windows-fftw32/fftw32.dll: build-windows-fftw32/Makefile
+	$(MAKE) -C build-windows-fftw32 CCLD="i686-w64-mingw32-gcc -Wc,-static-libgcc"
+	cp build-windows-fftw32/.libs/libfftw3-3.dll $@
+
+build-windows-fftw64/Makefile: | build-windows-fftw64
+	cd build-windows-fftw64 && ../fftw/configure --host=mingw32 --disable-alloca --with-our-malloc16 --with-windows-f77-mangling --enable-shared --disable-static --with-incoming-stack-boundary=2 --enable-sse2 --enable-avx CC=x86_64-w64-mingw32-gcc
+
+build-windows-fftw64/fftw64.dll: build-windows-fftw64/Makefile
+	$(MAKE) -C build-windows-fftw64 CCLD="x86_64-w64-mingw32-gcc -Wc,-static-libgcc"
+	cp build-windows-fftw64/.libs/libfftw3-3.dll $@
+
+build-windows-lapack32/lapack32.dll: | build-windows-lapack32
+	$(MAKE) -C build-windows-lapack32 -f ../Makefile.lapack CC=i686-w64-mingw32-gcc FC=i686-w64-mingw32-gfortran LAPACKLIB=$(notdir $@)
+
+build-windows-lapack64/lapack64.dll: | build-windows-lapack64
+	$(MAKE) -C build-windows-lapack64 -f ../Makefile.lapack CC=x86_64-w64-mingw32-gcc FC=x86_64-w64-mingw32-gfortran LAPACKLIB=$(notdir $@)
+
+build-windows-%:
+	mkdir $@
+
+clean:
+	rm -rf $(ZIPFILE) build-windows-*

Makefile.windows

@@ -10,8 +10,10 @@ build scripts for the libraries are included.
 
 ## Using the namespace
 
-Download `math.zip` and extract the files somewhere on your computer. In order
-for Windows to find the DLLs you'll have to put them:
+Download an appropriate `Math-*.zip` from the releases page and extract the
+files somewhere on your computer.
+
+In order for Windows to find the DLLs you'll have to put them:
 
 * in the current directory (this might be determined by the properties of the
 shortcut you use to start Dyalog), or
@@ -20,13 +22,20 @@ shortcut you use to start Dyalog), or
 
 ## Building the libraries
 
-The only supported build configuration is cross-compiling from Linux to Windows.
+The supported build configurations are:
+* Linux (x86 and x86-64)
+* Cross-compiling from Linux to Windows (x86 and x86-64)
 
-To build (tested on Ubuntu 15.10):
+To build natively:
 
-* install some cross-compilers with
-`sudo apt-get install gcc-mingw-w64 gfortran-mingw-w64`
+* install some 32- and 64-bit Fortran compilers with
+`sudo apt-get install gfortran-multilib`
 * `cd` into the root of the repository
-* type `make` (or e.g. `make -j8` if you have 8 CPU cores)
+* type `make -f Makefile.linux` to make `Math-linux.zip`
+
+To cross-compile (tested on Ubuntu 17.04):
 
-This will generate the release package `math.zip` in the current directory.
+* install some cross-compilers with
+`sudo apt-get install gfortran-mingw-w64`
+* `cd` into the root of the repository
+* type `make -f Makefile.windows` to make `Math-windows.zip`