5 ms·

Pretty spot on. I use a pretty similar dependency system for all of my C and C++ projects. FLAGS += -MMD CFLAGS += $(FLAGS) CXXFLAGS += $(FLAGS)

Pretty spot on. I use a pretty similar dependency system for all of my C and C++ projects. FLAGS += -MMD CFLAGS += $(FLAGS) CXXFLAGS += $(FLAGS) OBJECTS += $(patsubst %, build/%.o, $(SOURCES)) DEPS = $(patsubst %, build/%.d, $(SOURCES)) $(TARGET): $(OBJECTS) $(CXX) -o $@ $^ $(LDFLAGS) -include $(DEPS) build/%.c.o: %.c @mkdir -p $(@D) $(CC) $(CFLAGS) -c -o $@ $< build/%.cpp.o: %.cpp @mkdir -p $(@D) $(CXX) $(CXXFLAGS) -c -o $@ $<

babuskov 9y ago
This looks very similar to the Makefile I'm using except that beside -MMD I also have -MP flag. I created this Makefile a couple years back and I'm reusing it for every new project, but I cannot recall really why I needed to add -MP.
- vortico 9y ago
  https://gcc.gnu.org/onlinedocs/gcc-4.8.0/gcc/Preprocessor-Options.html https://gcc.gnu.org/onlinedocs/gcc-4.8.0/gcc/Preprocessor-Op... Looks useful, I'll add it to my configs.
  - babuskov 9y ago
    Yes, that's it. Removing a .h file from your project would trigger errors without that switch. I looked at clang manual when I searched for it, but unlike GCC it does not explain it.
cozzyd 9y ago
Wow, that -MMD flag is very handy. Can't believe I didn't know about it until now.
v_lisivka 9y ago
How to use it?
- vortico 9y ago
  Save the file to something like `compile.mk` and create a Makefile with SOURCES += $(wildcard src/*.cpp) SOURCES += other_files.c TARGET = foo include compile.mk
abainbridge 9y ago
For all these years I've been _replacing_ the .c and .cpp extension with .o in the object file name. How could I have been so wrong?!
- vortico 9y ago
  There's no problem with replacing, other than losing the ability to glance at an object and determine which language it came from, and name conflicts with `util.c` and `util.cpp` in the same directory (believe me, it happens).

babuskov 9y ago

This looks very similar to the Makefile I'm using except that beside -MMD I also have -MP flag. I created this Makefile a couple years back and I'm reusing it for every new project, but I cannot recall really why I needed to add -MP.

vortico 9y ago
https://gcc.gnu.org/onlinedocs/gcc-4.8.0/gcc/Preprocessor-Options.html https://gcc.gnu.org/onlinedocs/gcc-4.8.0/gcc/Preprocessor-Op... Looks useful, I'll add it to my configs.
- babuskov 9y ago
  Yes, that's it. Removing a .h file from your project would trigger errors without that switch. I looked at clang manual when I searched for it, but unlike GCC it does not explain it.

cozzyd 9y ago

Wow, that -MMD flag is very handy. Can't believe I didn't know about it until now.

v_lisivka 9y ago

How to use it?

vortico 9y ago
Save the file to something like `compile.mk` and create a Makefile with SOURCES += $(wildcard src/*.cpp) SOURCES += other_files.c TARGET = foo include compile.mk

abainbridge 9y ago

For all these years I've been _replacing_ the .c and .cpp extension with .o in the object file name. How could I have been so wrong?!

vortico 9y ago
There's no problem with replacing, other than losing the ability to glance at an object and determine which language it came from, and name conflicts with `util.c` and `util.cpp` in the same directory (believe me, it happens).