SHELL := /usr/bin/env bash -euo pipefail

# any absolute path to the stdlib breaks the Makefile
export LEAN_PATH=

# link GMP statically if STATIC=ON
export LEANC_GMP=${GMP_LIBRARIES}

# LEAN_OPTS: don't use native code (except for primitives) since it is from the previous stage
# MORE_DEPS: rebuild the stdlib whenever the compiler has changed
LEANMAKE_OPTS=\
  LEAN="${CMAKE_CROSSCOMPILING_EMULATOR} ${PREV_STAGE}/bin/lean${CMAKE_EXECUTABLE_SUFFIX}"\
	OUT="${LIB}"\
	LIB_OUT="${LIB}/lean"\
	OLEAN_OUT="${LIB}/lean"\
	BIN_OUT="${CMAKE_BINARY_DIR}/bin"\
	LEAN_OPTS+="${LEAN_EXTRA_MAKE_OPTS}"\
	LEANC_OPTS+="${LEANC_OPTS} -fPIC"\
	LEAN_CXX="${CMAKE_CXX_COMPILER_LAUNCHER} ${CMAKE_CXX_COMPILER}"\
	LEAN_AR="${CMAKE_AR}"\
	MORE_DEPS+="${PREV_STAGE}/bin/lean${CMAKE_EXECUTABLE_SUFFIX}"\
	CMAKE_LIKE_OUTPUT=1

.PHONY: all Init Std Lean leanshared Leanpkg

all: Init Std Lean leanshared Leanpkg

Init:
# Use `+` to use the Make jobserver with `leanmake` for parallelized builds
	+"${LEAN_BIN}/leanmake" lib PKG=Init $(LEANMAKE_OPTS)

Std: Init
	+"${LEAN_BIN}/leanmake" lib PKG=Std $(LEANMAKE_OPTS)

Lean: Init Std
	+"${LEAN_BIN}/leanmake" lib PKG=Lean $(LEANMAKE_OPTS)

leanshared: Init Std Lean
	@mkdir -p "${CMAKE_LIBRARY_OUTPUT_DIRECTORY}" || true
	"${LEAN_BIN}/leanc" -shared -o "${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/libleanshared${CMAKE_SHARED_LIBRARY_SUFFIX}" ${LEANSHARED_LINKER_FLAGS}

Leanpkg: Init Std Lean leanshared
	+"${LEAN_BIN}/leanmake" bin PKG=Leanpkg BIN_NAME=leanpkg${CMAKE_EXECUTABLE_SUFFIX} $(LEANMAKE_OPTS) LINK_OPTS="-lleanshared ${CMAKE_EXE_LINKER_FLAGS}"