Adding local search paths to MinGW/MSYS

msys_gcc_local.txt

Instructions copied from here: http://www.mingw.org/wiki/HOWTO_Use_the_GCC_specs_file

1) Check for an existing gcc specs file in <mingw-root>/lib/gcc/mingw32/<gcc-version>

2) If it doesn't exist, generate one
cd <mingw-root>/lib/gcc/mingw32/<gcc-version>
gcc -dumpspecs > specs

3) Add to the top of the specs file
*local_prefix:
<mingw-root>/local/
 
*local_includes:
-I%(local_prefix)include
 
*local_lib_search:
-L%(local_prefix)lib

4) Add %(local_includes) to the end of the *cpp entry

5) Add %(local_includes) to the end of the *cc1plus entry

6) Add %(local_lib_search) to the end of the *link_libgcc entry