CODEWITHSUNDEEP
makefile
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Reputation: 19333

Make - Have master Makefile store intermediate files in type-specific temp folder

I have a 500+ line Makefile that is used to handle various automated builds. In its current state, it specifies a few rules, and depends on an argument being passed to make to determine which architecture to build for, ie:

all: release_build clean_all debug_build clean_all

So, on my build server, for example, I can generate tarballs of my project for multiple architectures like so:

make all ARCH=armhf
make all ARCH=x86
make all ARCH=x64

I'm attempting to parallelize builds to speed up how quickly the build server can give me the output of these builds, since CPU and IO-wise, it's underutilized. However, this leads to havok, as all the architectures use the same naming scheme for intermediate object files.

Is there a simple way to have my builds generate an intermediate folder like .obj/${RELEASE_TYPE}/ to store the intermediate files? This would let me run debug and release builds in parallel

Thank you.

Upvotes: 0

Views: 121

Answers (1)

Beta
Beta

Reputation: 99104

This doesn't sound difficult. (I could have sworn there was already a question like this...)

OBJECTS := foo.o bar.o

OBJDIR := ./.obj/$(ARCH)

all: release_build debug_build

RELEASEOBJECTS := $(addprefix $(OBJDIR)/release/, $(OBJECTS))

release_build: $(RELEASEOBJECTS)
    do something with $^ to produce $@

DEBUGOBJECTS := $(addprefix $(OBJDIR)/debug/, $(OBJECTS))

debug_build: $(DEBUGOBJECTS)
    do something with $^ to produce $@

With some further trickery you could have one rule for both builds, but it would be quite cryptic.

Upvotes: 2

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