Building older versions of crystal on OpenBSD build steps

# Also see: http://wmoxam.com/crystal-openbsd.html

doas pkg_add -i git llvm boehm-gc libevent pcre gmake bash
git clone git@github.com:wmoxam/crystal.git

cd crystal

git checkout tags/0.20.3

wget http://wmoxam.com/public/crystal-0.20.3.tar.gz
tar zxvf crystal-0.20.3.tar.gz

clang++ -c -o src/llvm/ext/llvm_ext.o src/llvm/ext/llvm_ext.cc `llvm-config --cxxflags` 
clang -c -o src/ext/sigfault.o src/ext/sigfault.c `llvm-config --cflags`

clang++ crystal.o -o crystal -rdynamic  src/ext/sigfault.o src/llvm/ext/llvm_ext.o `(llvm-config --libs --system-libs --ldflags 2> /dev/null)` -lstdc++ -lpcre -lgc -lpthread -levent_core -levent_extra -lssl -liconv

gmake deps

CC=/usr/local/bin/clang gmake