How to Add a Default Include Path for Gcc in Linux?
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...
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.
4 Answers
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.
Create an alias for gcc with your favorite includes.
alias mygcc='gcc -I /whatever/'
just a note: CPLUS_INCLUDE_PATH and C_INCLUDE_PATH are not the equivalent of LD_LIBRARY_PATH.
LD_LIBRARY_PATH serves the ld (the dynamic linker at runtime) whereas the equivalent of the former two that serves your C/C++ compiler with the location of libraries is LIBRARY_PATH.
A gcc spec file can do the job, however all users on the machine will be affected.
Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.
