Restructure Makefiles

Use common.mk for basic toolchain settings and installation variables.

Makefile

@@ -1,3 +1,5 @@
+include common.mk
+
 all:
 	$(MAKE) -C src all
 

common.mk

@@ -0,0 +1,24 @@
+# compiler, tools
+CC = clang
+PKG_CONFIG ?= pkg-config
+
+# flags
+CFLAGS ?= -march=native -O2 -pipe
+CFLAGS += -std=c99 -pedantic -Wall -Wextra -Werror -Wno-unused-variable -Wno-unused-parameter -Wno-unused-function
+ifeq ($(shell $(CC) -v 2>&1 | grep 'gcc version' &>/dev/null && echo 1),1)
+CFLAGS += -Wno-unused-but-set-variable
+endif
+LDFLAGS ?= -Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu
+
+ifndef NODEBUG
+CFLAGS += -O0 -g3
+endif
+
+# install variables
+INSTALL = install
+INSTALL_BIN = install -m755
+INSTALL_DIR = install -d
+PREFIX = /usr/local
+LIBDIR = lib64
+INSTALL_BINDIR = $(PREFIX)/bin
+INSTALL_LIBDIR = $(PREFIX)/$(LIBDIR)

src/Makefile

@@ -1,18 +1,4 @@
-# compiler, tools
-CC = clang
-PKG_CONFIG ?= pkg-config
-
-# flags
-CFLAGS ?= -march=native -O2 -pipe
-CFLAGS += -std=c99 -pedantic -Wall -Wextra -Werror -Wno-unused-variable -Wno-unused-parameter -Wno-unused-function
-ifeq ($(shell $(CC) -v 2>&1 | grep 'gcc version' &>/dev/null && echo 1),1)
-CFLAGS += -Wno-unused-but-set-variable
-endif
-LDFLAGS ?= -Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu
-
-ifndef NODEBUG
-CFLAGS += -O0 -g3
-endif
+include ../common.mk
 
 TARGET = drow-engine
 HEADERS = err.h common.h print.h filereader.h gl_draw.h vector.h half_edge.h
@@ -23,15 +9,6 @@ CFLAGS += $(shell $(PKG_CONFIG) --cflags gl glu glib-2.0)
 LIBS = $(shell $(PKG_CONFIG) --libs gl glu glib-2.0) -lglut -lm
 CPPFLAGS += -D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED -D_GNU_SOURCE
 
-# install variables
-INSTALL = install
-INSTALL_BIN = install -m755
-INSTALL_DIR = install -d
-PREFIX = /usr/local
-LIBDIR = lib64
-INSTALL_BINDIR = $(PREFIX)/bin
-INSTALL_LIBDIR = $(PREFIX)/$(LIBDIR)
-
 %.o: %.c
 	$(CC) $(CFLAGS) $(CPPFLAGS) $(INCS) -c $*.c
 

src/test/Makefile

@@ -1,18 +1,4 @@
-# compiler, tools
-CC = clang
-PKG_CONFIG ?= pkg-config
-
-# flags
-CFLAGS ?= -march=native -O2 -pipe
-CFLAGS += -std=c99 -pedantic -Wall -Wextra -Werror -Wno-unused-variable -Wno-unused-parameter -Wno-unused-function
-ifeq ($(shell $(CC) -v 2>&1 | grep 'gcc version' &>/dev/null && echo 1),1)
-CFLAGS += -Wno-unused-but-set-variable
-endif
-LDFLAGS ?= -Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu
-
-ifndef NODEBUG
-CFLAGS += -O0 -g3
-endif
+include ../../common.mk
 
 TARGET = test
 HEADERS = cunit.h
@@ -23,15 +9,6 @@ CFLAGS += $(shell $(PKG_CONFIG) --cflags gl glu glib-2.0)
 LIBS = $(shell $(PKG_CONFIG) --libs gl glu glib-2.0) -lglut -lm -lcunit
 CPPFLAGS += -D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED -D_GNU_SOURCE
 
-# install variables
-INSTALL = install
-INSTALL_BIN = install -m755
-INSTALL_DIR = install -d
-PREFIX = /usr/local
-LIBDIR = lib64
-INSTALL_BINDIR = $(PREFIX)/bin
-INSTALL_LIBDIR = $(PREFIX)/$(LIBDIR)
-
 %.o: %.c
 	$(CC) $(CFLAGS) $(CPPFLAGS) $(INCS) -c $*.c