CODEWITHSUNDEEP
macosg++
Tommy
Tommy

Reputation: 13632

How to construct default g++ include path on mac 10.8?

This post: What is the default path for OSX system include files when building a C++ application? gives me a command I can run to see what my default g++ include path is:

echo "" | gcc - -xc -v -E

When I run this, among other things, I get my default include path:

#include <...> search starts here:
/Applications/gcc471/lib/gcc/x86_64-apple-darwin12.0.0/4.7.1/include
/usr/local/include
/Applications/gcc471/include
/Applications/gcc471/lib/gcc/x86_64-apple-darwin12.0.0/4.7.1/include-fixed
/usr/include
/System/Library/Frameworks
/Library/Frameworks

However, I have no idea how this path is constructed. How do I change the order of this default path? Note, this is not $PATH (I know how to do export $PATHs in my .profile). Checking /etc/paths led to a help file explaining how $PATH is actually constructed, but I want to know how this different include path (not sure if it has a system name like $INCLUDEPATH) is constructed, and how I can change its order.

Upvotes: 0

Views: 2166

Answers (1)

trojanfoe
trojanfoe

Reputation: 122381

It's kinda builtin to gcc; see gcc -dumpspecs. This article shows you how to change all that stuff, however you don't need to change it, you just add to it using the -I command line option:

e.g.:

$ gcc -I /path/to/my/fave/lib -c file.cpp

(you can use multiple -I flags on the same command line).

Upvotes: 1

Related Questions