-CFLAGS = -DDRI_NEW_INTERFACE_ONLY $(WARN_FLAGS) -g $(OPT_FLAGS) $(ASM_FLAGS) \
- -std=c99 $(PIC_FLAGS) -ffast-math $(SOURCE_FLAGS) -DPTHREADS \
- -I/usr/X11R6/include -I/usr/X11R6/include/X11/extensions
+OPT_FLAGS = -g
+PIC_FLAGS = -fPIC
+
+# Add '-DGLX_USE_TLS' to ARCH_FLAGS to enable TLS support.
+ARCH_FLAGS ?=
+
+DEFINES = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE \
+ -D_BSD_SOURCE -D_GNU_SOURCE \
+ -DPTHREADS -DUSE_EXTERNAL_DXTN_LIB=1 -DIN_DRI_DRIVER \
+ -DGLX_DIRECT_RENDERING -DHAVE_ALIAS
+
+X11_INCLUDES = -I/usr/X11R6/include
+
+CFLAGS = -Wall -Wmissing-prototypes -std=c99 -ffast-math \
+ $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) $(ASM_FLAGS)
+
+CXXFLAGS = -Wall $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES)