INCLUDE_DIRS = ../../src ../../blst/bindings

LIBRARY_FOLDER=src/main/resources/ethereum/ckzg4844/lib

FIELD_ELEMENTS_PER_BLOB ?= 4096

CC_FLAGS = -DFIELD_ELEMENTS_PER_BLOB=$(FIELD_ELEMENTS_PER_BLOB)

ifeq ($(OS),Windows_NT)
  CLANG_EXECUTABLE=clang
  GRADLE_COMMAND=gradlew
  CLANG_FLAGS=-shared
  JNI_INCLUDE_FOLDER=win32
  OS_ARCH=amd64
  LIBRARY_RESOURCE=ckzg4844jni.dll
else
  CLANG_EXECUTABLE=clang
  GRADLE_COMMAND=./gradlew
  UNAME_S := $(shell uname -s)
  ifeq ($(UNAME_S),Linux)
    CLANG_FLAGS=-fPIC -shared
    JNI_INCLUDE_FOLDER=linux
    OS_ARCH=amd64
    LIBRARY_RESOURCE=libckzg4844jni.so
  endif
  ifeq ($(UNAME_S),Darwin)
    ifeq ($(JAVA_HOME),)
      JAVA_HOME := $(shell /usr/libexec/java_home)
    endif
    CLANG_FLAGS=-dynamiclib
    JNI_INCLUDE_FOLDER=darwin
    OS_ARCH=x86_64
    LIBRARY_RESOURCE=libckzg4844jni.dylib
  endif
endif

ifeq ($(JAVA_HOME),)
  $(error JAVA_HOME is not set and autodetection failed)
endif

all: build test

build:
	mkdir -p ${LIBRARY_FOLDER}/${OS_ARCH}
	${CLANG_EXECUTABLE} ${CC_FLAGS} ${CLANG_FLAGS} -O -Wall ${addprefix -I,${INCLUDE_DIRS}} -I"${JAVA_HOME}/include" -I"${JAVA_HOME}/include/${JNI_INCLUDE_FOLDER}" -o ${LIBRARY_FOLDER}/${OS_ARCH}/${LIBRARY_RESOURCE} c_kzg_4844_jni.c c_kzg_4844.o ../../lib/libblst.a

test:
	${GRADLE_COMMAND} clean test