2001-02-17  Manish Singh  <yosh@gimp.org>

        * app/core/Makefile.am: add a -DGIMP_COMPILATION so cpercep can
        optionally include glib.h. This needs to be done in the makefile.msc
        too, but I'm unsure on the right way to do that.

        * app/core/cpercep.c: guard #include <glib.h> in GIMP_COMPILATION.
        cbrt() is a GNU extension, so define in terms of pow if we aren't
        on glibc. Guard CLAMP against redefinition.

        * plug-ins/gfig/gfig.c
        * plug-ins/gflare/gflare.c
        * plug-ins/gimpressionist/gimpressionist.c: make them build again