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# Gentoo custom Makefile for the JNI portion of lz4-java
#
# Adapted from the logic for target "compile-jni" in build.xml,
# but uses lz4 installed on the system. This Makefile respects
# custom CFLAGS and LDFLAGS settings, whereas build.xml does not.
# Java system properties read by build.xml
PLATFORM ?= linux
SRC ?= src
BUILD ?= build
JAVA_HOME ?=
# Requires lz4-java-*-print-os-props.patch
OS_ARCH := $(shell ant os-props 2>&1 > /dev/null && \
grep 'os\.arch=' os.properties | sed -e 's/os\.arch=//')
MKDIR_P = mkdir -p
SRC_DIR := $(SRC)/jni
OBJS_DIR_PREFIX := $(BUILD)/objects
OBJS_DIR := $(OBJS_DIR_PREFIX)/$(SRC_DIR)
OUT_DIR := $(BUILD)/jni/net/jpountz/util/$(PLATFORM)/$(OS_ARCH)
SRC_FILES := $(wildcard $(SRC_DIR)/*.c)
OBJS := $(addprefix $(OBJS_DIR_PREFIX)/,$(SRC_FILES:.c=.o))
SONAME = liblz4-java.so
# C compiler arguments may be obtained by running 'ant -v compile-jni',
# as long as dev-java/cpptasks is in the classpath
CFLAGS := -fPIC $(CFLAGS)
$(OUT_DIR)/$(SONAME): $(OBJS) | $(OUT_DIR)
# '-llz4' must be listed after this package's objects
# https://wiki.gentoo.org/wiki/Project:Quality_Assurance/As-needed#Importance_of_linking_order
$(CC) $(CFLAGS) -shared $(LDFLAGS) -Wl,-soname,$(SONAME) -o $@ $^ -llz4
$(OBJS_DIR_PREFIX)/%.o: %.c | $(OBJS_DIR)
$(CC) $(CFLAGS) -c -o $@ \
-I$(JAVA_HOME)/../include -I$(JAVA_HOME)/../include/$(PLATFORM) \
-I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/$(PLATFORM) \
-I$(BUILD)/jni-headers \
$<
$(OUT_DIR):
$(MKDIR_P) $@
$(OBJS_DIR):
$(MKDIR_P) $@
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