Makefile and configure should respect user's pkg-config
--- a/Makefile
+++ b/Makefile
@@ -28,9 +28,10 @@
 OSFLAG = $(shell uname | tr '[:lower:]' '[:upper:]')
 SHELL=/bin/sh
 
+PKG_CONFIG ?= pkg-config
 GKRELL1FLAG=1
 #find out if we have gkrellm 2 or 1 (from the gtk+ version)
-GKRELL1FLAG=$(shell bash -c 'pkg-config gtk+-2.0 --cflags &>/dev/null && echo 0')
+GKRELL1FLAG=$(shell bash -c "${PKG_CONFIG} gtk+-2.0 --cflags &>/dev/null && echo 0")
 GKRELLTOP = gkrelltop.so
 OBJ = top_three.o gkrelltop.o 
 EXTRA = krell_panel1.xpm
@@ -43,7 +44,8 @@ endif
 
 ifeq ($(GKRELL1FLAG),0)
 # Parameters for gkrellm version 2.*
-CFLAGS2 = -g -D$(OSFLAG) -DGKRELLM2 -fPIC -Wall `pkg-config gtk+-2.0 --cflags`
+GTK_INCLUDE=$(shell ${PKG_CONFIG} gtk+-2.0 --cflags)
+CFLAGS2 = -g -D$(OSFLAG) -DGKRELLM2 -fPIC -Wall ${GTK_INCLUDE}
 LIBS =  
 CC += $(CFLAGS) $(CFLAGS2)
 
@@ -69,8 +71,9 @@ LIBSD = `glib-config --libs`
 LIBSD = 
 CONFIGURE_ARGS += --with-glib12
 else
-CFLAGSD = -D$(OSFLAG) -fPIC -Wall `pkg-config glib-2.0 --cflags`
-LIBSD = `pkg-config glib-2.0 --libs`
+GLIB_INCLUDE=$(shell ${PKG_CONFIG} glib-2.0 --cflags)
+CFLAGSD = -D$(OSFLAG) -fPIC -Wall ${GLIB_INCLUDE}
+LIBSD = $(shell ${PKG_CONFIG} glib-2.0 --libs)
 LIBSD = 
 endif
 INSTALLDIRD ?= $(PREFIXD)/$(DESTDIR)
--- a/configure
+++ b/configure
@@ -4,8 +4,9 @@
 # There is no need to run this configure before doing a make.
 #
 
-GLIB_INCLUDE=`pkg-config --cflags glib-2.0`
-GLIB_LIBS=`pkg-config --libs glib-2.0`
+PKG_CONFIG=${PKG_CONFIG-pkg-config}
+GLIB_INCLUDE=$(${PKG_CONFIG} --cflags glib-2.0)
+GLIB_LIBS=$(${PKG_CONFIG} --libs glib-2.0)
 
 for i
 do
@@ -17,8 +18,8 @@ do
 done
 
 
-PKG_INCLUDE=`pkg-config gkrellm --cflags --silence-errors`
-PKG_LIBS=`pkg-config gkrellm --libs --silence-errors`
+PKG_INCLUDE=$(${PKG_CONFIG} gkrellm --cflags --silence-errors)
+PKG_LIBS=$(${PKG_CONFIG} gkrellm --libs --silence-errors)
 
 if [ "$PKG_INCLUDE" = "" ]
 then
-- 
2.34.1