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solibrary.htm
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solibrary.htm
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf8" />
<title>.so library example</title>
</head>
<body><a href="https://github.cppom/ArsenShnurkov/gentoo-mono-handbook"><img alt="Fork me on GitHub" id="forkme" src="images/forkme.png" align="right" width="100" /></a>
<table><tr><td style="vertical-align:top;">
<h1>.so library example</h1>
</td><td style="vertical-align:top;">
<a href="pinvoke.htm">PInvoke</a>,
<a href="index.htm">Gentoo Mono Handbook</a>
<br />
</td></tr></table>
<pre>#!/bin/bash
OUTDIR=./bin/Debug
mkdir -p ${OUTDIR}
CXX=clang++
CCARGS="-Ishared-object -Wall"
LIBRARY="-shared -fPIC"
LDFLAGS="-L${OUTDIR}"
echo "building shared object"
${CXX} ${CCARGS} "./shared-object/shared-object.cpp" ${LIBRARY} -o ${OUTDIR}/libshared-objects.so.1.20160226.0
cd ${OUTDIR}
ln -sfn libshared-objects.so.1.20160226.0 libshared-objects.so.1
ln -sfn libshared-objects.so.1 libshared-objects.so
cd ../..
echo "building first app"
${CXX} ${CCARGS} "./first-app/first-app.cpp" -lshared-objects ${LDFLAGS} -o ${OUTDIR}/first-app.exe
echo "building second app"
${CXX} ${CCARGS} "./second-app/second-app.cpp" -lshared-objects ${LDFLAGS} -o ${OUTDIR}/second-app.exe</pre>
Library API (./shared-object/shared-object.h):
<pre>#ifndef __SHARED_OBJECT_H__
#define __SHARED_OBJECT_H__
extern "C" int calc(int a, int b);
#endif</pre>
Library implementation (./shared-object/shared-object.cpp):
<pre>#include "shared-object.h"
int calc(int a, int b)
{
return a+b;
}</pre>
First application (./first-app/first-app.cpp):
<pre>#include <iostream>
#include "shared-object.h"
using namespace std;
int main(int argc, char** argv)
{
cout << "first-app " << calc (3,11) << endl;
return 0;
}</pre>
Second application (./second-app/second-app.cpp):
<pre>#include <iostream>
#include "shared-object.h"
using namespace std;
int main(int argc, char** argv)
{
cout << "second-app " << calc(2,5) << endl;
return 0;
}</pre>
</body>
</html>