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       im_guess_prefix, im_guess_libdir - try to guess install directory


       #include <vips/vips.h>

       const char *im_guess_prefix( const char *argv0, const char *env_name )

       const char *im_guess_libdir( const char *argv0, const char *env_name )


       im_guess_prefix(3)  tries  to  guess  the install directory. You should
       pass in the value of argv[0] (the name your program was run  as)  as  a
       clue  to help it out, plus the name of the environment variable you let
       the user override your package install area with (eg. "VIPSHOME").

       On success, im_guess_prefix(3) returns the prefix it discovered, and as
       a side effect, sets the environment variable (if it’s not set).

       im_guess_prefix(3)  is useful for programs in the VIPS distribution and
       contrib which need to be able to find data files.

       Don’t free the return string!

       im_guess_libdir(3) works exactly as im_guess_prefix(3) but, if vips has
       not  been  moved since configure, returns the libdir configure setting.
       If vips has been moved, it returns prefix/lib.


       The function returns NULL on failure.

                                 8 March 2001                   IM_VIPSHOME(3)