https://sourceforge.net/tracker/?func=detail&aid=3601612&group_id=73485&atid=537940

--- GraphicsMagick-1.3.18/configure
+++ GraphicsMagick-1.3.18/configure
@@ -22249,7 +22249,6 @@
 # directory as GraphicsMagick installation prefix.
 #LDFLAGS="$LDFLAGS -L$LIB_DIR"
 #CPPFLAGS="$CPPFLAGS -I$INCLUDE_DIR"
-MAGICK_API_CPPFLAGS="-I$INCLUDE_DIR/GraphicsMagick $MAGICK_API_CPPFLAGS"
 
 #
 # Find the X11 RGB database
@@ -25994,8 +25993,8 @@
     then
       freetype_prefix=`${freetype_config} --prefix`
       freetype_exec_prefix=`${freetype_config} --exec-prefix`
-      LDFLAGS="$LDFLAGS -L${freetype_exec_prefix}/lib"
-      CPPFLAGS="$CPPFLAGS -I${freetype_prefix}/include/freetype2"
+      LDFLAGS="$LDFLAGS `${PKG_CONFIG:-pkg-config} freetype2 --libs`"
+      CPPFLAGS="$CPPFLAGS `${PKG_CONFIG:-pkg-config} freetype2 --cflags`"
     fi
 
     if test "$LIB_TTF" = ''
@@ -29605,7 +29604,7 @@
 
 MAGICK_API_CFLAGS=$CFLAGS
 MAGICK_API_CPPFLAGS=`echo $MAGICK_API_CPPFLAGS | sed -e 's/  */ /g'`
-MAGICK_API_LDFLAGS="-L$LIB_DIR $LDFLAGS"
+MAGICK_API_LDFLAGS="$LDFLAGS"
 MAGICK_API_DEP_LIBS="$MAGICK_DEP_LIBS"
 MAGICK_API_LIBS="-lGraphicsMagick $MAGICK_API_DEP_LIBS"