OSX gcc没有找到已安装的库

我重新发现我刚刚安装编译C的恐怖libtins从http://libtins.github.io,通常如下./configure- > make- > sudo make install模式.

sudo make install肯定把标题放入,/usr/local/include/tins但它似乎不能g++看到它们.

按照这里的建议,我尝试运行gcc -x c++ -v -E /dev/null以查看包含路径.

clang -cc1 version 5.1 based upon LLVM 3.4svn default target x86_64-apple-darwin13.3.0
ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/local/include"
ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/Library/Frameworks"
#include "..." search starts here:
#include <...> search starts here:
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/5.1/include
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks (framework directory)
End of search list.

我原本希望能/usr/local/include在某处看到.现在Xcode应用程序内的默认路径路径是否全部？

app.cpp

#include 

int main() {
    return 1;
}

编译命令

g++ app.cpp -ltins

结果

app.cpp:3:10: fatal error: 'tins/tins.h' file not found

知道如何g++查看标题吗？