我关注Setup Guide of another Post并使用XCode作为ROOT IDE获得了一个工作示例。现在我尝试在同一个项目中包含Minuit2 example code:
#include "Minuit2/Minuit2Minimizer.h"
#include "Math/Functor.h"
double RosenBrock(const double *xx )
{
const double_t x = xx[0];
const double_t y = xx[1];
const double_t tmp1 = y-x*x;
const double_t tmp2 = 1-x;
return 100*tmp1*tmp1+tmp2*tmp2;
}
int main()
{
// Choose method upon creation between:
// kMigrad, kSimplex, kCombined,
// kScan, kFumili
ROOT::Minuit2::Minuit2Minimizer min ( ROOT::Minuit2::kMigrad );
min.SetMaxFunctionCalls(1000000);
min.SetMaxIterations(100000);
min.SetTolerance(0.001);
ROOT::Math::Functor f(&RosenBrock,2);
double step[2] = {0.01,0.01};
double variable[2] = { -1.,1.2};
min.SetFunction(f);
// Set the free variables to be minimized!
min.SetVariable(0,"x",variable[0], step[0]);
min.SetVariable(1,"y",variable[1], step[1]);
min.Minimize();
const double *xs = min.X();
std::cout << "Minimum: f(" << xs[0] << "," << xs[1] << "): "
<< RosenBrock(xs) << std::endl;
return 0;
}
我测试了代码作为根宏并且工作正常,但尝试在XCode中编译它会产生以下错误:
架构x86_64的未定义符号: 为架构x86_64定义的符号: &#34; ROOT :: Minuit2 :: Minuit2Minimizer :: SetFunction(ROOT :: Math :: IBaseFunctionMultiDim const&amp;)&#34;,引自: _main in main.o
以及更多未定义的符号。
我做错了什么?
我通过
在Macports上安装了ROOTsudo port install root6
并确保安装了变体+ minuit2。然后我添加了搜索路径和关联:
Targets > Build Settings > User Header Search Paths > Debug > /opt/local/libexec/root6/include/root
Targets > Build Settings > Other Linker Flags > Debug > -L/opt/local/libexec/root6/lib/root -lCore -lRIO -lNet -lHist -lGraf -lGraf3d -lGpad -lTree -lRint -lPostscript -lMatrix -lPhysics -lMathCore -lThread -lMultiProc -lpthread -Wl,-rpath,/opt/local/libexec/root6/lib/root -stdlib=libc++ -lm -ldl
我来自
root/bin/root-config --libs
答案 0 :(得分:0)
自己回答这个问题: 你必须添加
-lMinuit2
到Build设置中的其他Flags。 不知何故
root-config --libs
不会自动添加minuit2链接器。