How to add a default include path for GCC in Linux?

linux gcc include environment-variables
Jesse Beder picture Jesse Beder · Feb 17, 2009 · Viewed 506.7k times · Source

I'd like gcc to include files from $HOME/include in addition to the usual include directories, but there doesn't seem to be an analogue to $LD_LIBRARY_PATH.

I know I can just add the include directory at command line when compiling (or in the makefile), but I'd really like a universal approach here, as in the library case.

Answer

jcrossley3 picture jcrossley3 · Feb 17, 2009

Try setting C_INCLUDE_PATH (for C header files) or CPLUS_INCLUDE_PATH (for C++ header files).

As Ciro mentioned, CPATH will set the path for both C and C++ (and any other language).

More details in GCC's documentation.

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