Compiling MSWindows binary of Asymptote under CYGWIN-x86_64

First run build-asymptote on Linux. This will build the documentation
and source tar ball and copy them to a directory ~/shared which needs to be
shared via virtualbox to the cygwin build environment.

Install TeXLive and required Cygwin packages:

setup-x86_64.exe -q -P git,wget,make,patch,gcc-g++,autoconf2.5,bison,flex,w32api-headers,w32api-runtime,zlib-devel,glm-devel,automake1.15,libtool

setup-x86_64.exe -q -I -P libtirpc-devel,libreadline-devel,libfftw3-devel,libgsl-devel,libcurl-devel

Download wolfssl GPLV3 source code from www.wolfssl.com

Build and install static libraries from /usr/src:

gsl-devel:
./configure --prefix=/usr
make install

readline-devel:
./configure --prefix=/usr --disable-shared
make install LOCAL_CFLAGS=-DNEED_EXTERN_PC

fftw3-devel:
./configure --prefix=/usr --disable-shared
make install

tirpc-devel:
./configure --prefix=/usr --disable-gssapi
make install
rm -rf /usr/include/rpc
ln -s /usr/include/tirpc/rpc /usr/include/rpc
ln -sf /usr/include/tirpc/netconfig.h /usr/include/netconfig.h
ln -sf /usr/lib/libtirpc.a /usr/lib/librpc.a

termcap-1.3.1:
./configure --prefix=/usr
make install

wolfssl-4.4.0-gplv3-fips-ready:
./configure --prefix=/usr --enable-static
make install

curl-7.71.1:
./configure --prefix=/usr --disable-shared --without-brotli --without-ssl --with-wolfssl
make install

git clone http://github.com/vectorgraphics/asymptote

freeglut-3.0.0:
patch -p1 < ~/asymptote/patches/cygwin_freeglut-3.0.0.patch
cmake CMakeLists.txt
make
cp lib/libfreeglut_static.a /usr/lib/libfreeglut.a
cp -a include/GL/*.h /usr/include/w32api/GL/

mkdir -p ~/dll/cygwin
cp /usr/bin/cygwin1.dll ~/dll/cygwin

mkdir ~/CTAN
cp -a ~/asymptote/build-scripts/README-binaries ~/CTAN

cd ~/
GCVERSION=7.6.2
ATOMICVERSION=7.6.10
wget http://hboehm.info/gc/gc_source/gc-$GCVERSION.tar.gz
wget https://github.com/ivmai/libatomic_ops/releases/download/v$ATOMICVERSION/libatomic_ops-$ATOMICVERSION.tar.gz
tar -zxf gc-$GCVERSION.tar.gz
tar -zxf libatomic_ops-$ATOMICVERSION.tar.gz
mv libatomic_ops-$ATOMICVERSION gc-$GCVERSION/libatomic_ops
cd gc-$GCVERSION
./configure --disable-shared
make check

~/asymptote/build-scripts/build-asymptote.dos <VERSION>