diff -U2 --recursive mathgl-1.6.2.orig/configure.ac mathgl-1.6.2/configure.ac
--- mathgl-1.6.2.orig/configure.ac	2008-04-03 01:24:42.000000000 +0700
+++ mathgl-1.6.2/configure.ac	2008-05-03 11:36:42.000000000 +0700
@@ -144,8 +144,8 @@
   *) AC_MSG_ERROR(bad value ${enableval} for --enable-fltk) ;;
 esac],[fltk=false])
-AC_CHECK_HEADER(FL/Fl_Export.H,[(test x$all = xtrue || test x$fltk = xtrue) && FLTK_FLAGS=-DHAVE_FLTK AC_SUBST(FLTK_FLAGS)],
+AC_CHECK_HEADER(@FLTK_H@FL/Fl_Export.H,[(test x$all = xtrue || test x$fltk = xtrue) && FLTK_FLAGS="-DHAVE_FLTK @FLTK_FLAGS@" AC_SUBST(FLTK_FLAGS)],
     [(test x$all = xtrue || test x$fltk = xtrue) && echo "Please install fltk headers" && exit])
 
-AC_CHECK_LIB([fltk], [main], [(test x$all = xtrue || test x$fltk = xtrue) && FLTK_LIBS="-lfltk -lfltk_images" AC_SUBST(FLTK_LIBS)],
+AC_CHECK_LIB([fltk], [main], [(test x$all = xtrue || test x$fltk = xtrue) && FLTK_LIBS="@FLTK_LIBS@" AC_SUBST(FLTK_LIBS)],
     [(test x$all = xtrue || test x$fltk = xtrue) && echo "Please install fltk library" && exit])
 AM_CONDITIONAL(USE_FLTK, (test x$all = xtrue || test x$fltk = xtrue))
diff -U2 --recursive mathgl-1.6.2.orig/examples/Makefile.am mathgl-1.6.2/examples/Makefile.am
--- mathgl-1.6.2.orig/examples/Makefile.am	2008-04-03 01:24:42.000000000 +0700
+++ mathgl-1.6.2/examples/Makefile.am	2008-05-03 11:37:28.000000000 +0700
@@ -19,5 +19,5 @@
 mgl_fltk_example_SOURCES = fltk_example.cpp
 mgl_fltk_example_LDADD = $(top_builddir)/mgl/libmgl-fltk.la
-mgl_fltk_example_CFLAGS = -O2
+mgl_fltk_example_CFLAGS = -O2 @FLTK_FLAGS@
 mgl_fltk_example_CPPFLAGS = $(mgl_fltk_example_CFLAGS)
 endif