6afdf13ae4
Take an example when `CXX_SOURCES` is main.cpp. main.d is an included file. make will rebuild main.d, re-executes itself [1] to read in the new main.d file, then rebuild main.o, finally link main.o into a.out. main.cpp is parsed twice in this process. This patch merges .d generation into .o generation [2], writes explicit rules for .c/.m and deletes suffix rules for %.m and %.o. Since a target can be satisfied by either of .c/.cpp/.m/.mm, we use multiple pattern rules. The rule with the prerequisite (with VPATH considered) satisfied is used [3]. Since suffix rules are disabled, the implicit rule for archive member targets is no long available [4]. Rewrite, simplify the archive rule and inline it into the only test `test/API/functionalities/archives/Makefile`. [1]: https://www.gnu.org/software/make/manual/html_node/Remaking-Makefiles.html [2]: http://make.mad-scientist.net/papers/advanced-auto-dependency-generation/ [3]: https://www.gnu.org/software/make/manual/html_node/Pattern-Match.html [4]: https://www.gnu.org/software/make/manual/html_node/Archive-Update.html ObjC/ObjCXX tests only run on macOS. I don't have testing environment. Hope someone can do it for me. Reviewed By: JDevlieghere Differential Revision: https://reviews.llvm.org/D94890
15 lines
218 B
Makefile
15 lines
218 B
Makefile
C_SOURCES := main.c a.c b.c
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EXE := # Define a.out explicitly
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MAKE_DSYM := NO
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all: a.out
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a.out: main.o libfoo.a
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$(LD) $(LDFLAGS) $^ -o $@
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libfoo.a: a.o b.o
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$(AR) $(ARFLAGS) $@ $^
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$(RM) $^
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include Makefile.rules
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