CC = gcc
CXX = g++
-CFLAGS = -O3 -ansi -pedantic -fPIC -ffast-math -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE -DUSE_XSHM -DPTHREADS -I/usr/X11R6/include
-CXXFLAGS = -O3 -ansi -pedantic -fPIC -ffast-math -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE
-GLUT_CFLAGS = -fexceptions
+OPT_FLAGS = -O3 -g
+PIC_FLAGS = -fPIC
+
+# Add '-DGLX_USE_TLS' to ARCH_FLAGS to enable TLS support. Add -m32
+# to build properly on 64-bit platforms.
+
+ARCH_FLAGS ?=
+
+DEFINES = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE \
+ -D_BSD_SOURCE -D_GNU_SOURCE \
+ -DPTHREADS -DUSE_XSHM -DHAVE_POSIX_MEMALIGN
+
+X11_INCLUDES = -I/usr/X11R6/include
+CFLAGS = -Wall -Wmissing-prototypes -Wdeclaration-after-statement \
+ $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) \
+ $(DEFINES) $(ASM_FLAGS) $(X11_INCLUDES) -std=c99 -ffast-math
+
+CXXFLAGS = -Wall $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) \
+ $(X11_INCLUDES)
+
+# Work around aliasing bugs - developers should comment this out
+CFLAGS += -fno-strict-aliasing
+CXXFLAGS += -fno-strict-aliasing
+
+GLUT_CFLAGS = -fexceptions
-# Library/program dependencies
-# Need to have -L/usr/X11R6/lib in these:
-GL_LIB_DEPS = -L/usr/X11R6/lib -lX11 -lXext -lm -lpthread
-GLUT_LIB_DEPS = -L$(LIB_DIR) -l$(GLU_LIB) -l$(GL_LIB) -L/usr/X11R6/lib -lX11 -lXmu -lXt -lXi -lm
-GLW_LIB_DEPS = -L$(LIB_DIR) -l$(GL_LIB) -L/usr/X11R6/lib -lXt -lX11
+EXTRA_LIB_PATH = -L/usr/X11R6/lib