lp_solve lpsolve java MAC osx

经过众多尝试，lp_solve是开源代码中最好用的具有整数线性规划能力的工具，易学简单还免费，支持各种不同的语言。
我的gcc 版本是4.2，java版本是1.8。

下载lp_solve_5.5_source.tar.gz和lp_solve_5.5_java.zip并解压为lp_solve_5.5和lp_solve_5.5_java
cd lp_solve_5.5/lpsolve55
sh ccc.osx
bin/osx64/中生成了liblpsolve55.a和liblpsolve55.dylib，拷贝他们到lp_solve_5.5/lpsolve55
lp_solve_5.5_java/lib/mac中的build-osx修改为如下形式

# -------------------------------------------------------------------
# This is a build file for the lp_solve Java wrapper stub library
# on Mac OS X platforms.
#
# Requirements and preconditions:
#
# - gcc and g++ compiler installed (I used gcc Version 3.3 20030304 )
# - Apple JDK 1.4 installed (I have JDK 1.4.2)
# - lp_solve archive (lp_solve_5.5_source.tar.gz) unpacked
#
# Change the paths below this line and you should be ready to go!
# -------------------------------------------------------------------
LPSOLVE_DIR=/xxxxxxxxx/lp_install_files/lp_solve_5.5/
JDK_DIR=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/JavaVM.framework/Versions/A/Headers

# OK, here we go!

SRC_DIR=../../src/c
INCL="-I $JDK_DIR -I $LPSOLVE_DIR -I $SRC_DIR -idirafter /usr/include/sys"

g++ -fPIC -fno-common $INCL -c $SRC_DIR/lpsolve5j.cpp
g++ -dynamiclib lpsolve5j.o -compatibility_version 5.5.0 -current_version 5.5.0 -o liblpsolve55j.jnilib -lc /xxxxxxxxxxxxxx/lp_solve_5.5/liblpsolve55.a

其中JDK_DIR可以用find / -name "jni_md.h" 来找，会出来好几个包含jni_md.h的目录，挨个试试。

sh build-osx，一切顺利的话会得到一个liblpsolve55j.jnilib。
最后把liblpsolve55.a，liblpsolve55.dylib, liblpsolve55j.jnilib, lpsolve55j.jar放到java的lib路径中，可以通过下面的代码动态添加用户的lib文件夹：

CLASSPATH=$CLASSPATH:$JNEAT_LOCATION'/xxxx/lpsolver-mac64'
CLASSPATH=$CLASSPATH:$JNEAT_LOCATION'/xxxx/lpsolver-mac64/lpsolve55j.jar'
export CLASSPATH
export LD_LIBRARY_PATH=$JNEAT_LOCATION'/xxxx/lpsolver-mac64'
javac Demo.java
java -Djava.library.path=./xxxx/lpsolver-mac64 Demo

lp_solve lpsolve java MAC osx

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