$FreeBSD$

--- Makefile.orig
+++ Makefile
@@ -121,17 +121,17 @@
 # ----------------------------------------------------------------------------
 ifeq ($(patsubst FreeBSD%,FreeBSD,$(SYSTEM)), FreeBSD)
 NAME = GLEW
-CC = cc
-LD = ld
+CC ?= cc
+LD ?= ld
 ifneq (undefined, $(origin GLEW_MX))
 CFLAGS.EXTRA = -DGLEW_MX
 endif
 LDFLAGS.SO = -shared -soname $(LIB.SONAME)
-LDFLAGS.EXTRA = -L/usr/X11R6/lib
+LDFLAGS.EXTRA = -L${X11BASE}/lib
 LDFLAGS.GL = -lXmu -lXi -lGLU -lGL -lXext -lX11
 LDFLAGS.STATIC = -Wl,-Bstatic
 LDFLAGS.DYNAMIC = -Wl,-Bdynamic
-CFLAGS.EXTRA += -I/usr/X11R6/include
+CFLAGS.EXTRA += -I${X11BASE}/include -fPIC
 NAME = GLEW
 WARN = -Wall -W
 POPT = -O2
@@ -245,7 +245,7 @@
 STRIP = -s
 endif
 INCLUDE = -Iinclude
-CFLAGS = $(OPT) $(WARN) $(INCLUDE) $(CFLAGS.EXTRA)
+CFLAGS += $(OPT) $(WARN) $(INCLUDE) $(CFLAGS.EXTRA)
 
 LIB.SRCS = src/glew.c
 LIB.OBJS = $(LIB.SRCS:.c=.o)