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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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programming:makefile [2024/03/22 09:25] niziak |
programming:makefile [2024/03/22 09:30] (current) niziak |
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| Line 16: | Line 16: | ||
| cd $(<D) | cd $(<D) | ||
| gobble $(<F) > ../$@ | gobble $(<F) > ../$@ | ||
| + | </code> | ||
| + | |||
| + | === disable built-in rules === | ||
| + | |||
| + | <code makefile> | ||
| + | # Disable built-in rules and variables | ||
| + | MAKEFLAGS += --no-builtin-rules | ||
| + | MAKEFLAGS += --no-builtin-variables | ||
| </code> | </code> | ||
| === VPATH === | === VPATH === | ||
| + | |||
| [[https://www.gnu.org/software/make/manual/html_node/General-Search.html]] | [[https://www.gnu.org/software/make/manual/html_node/General-Search.html]] | ||
| Line 30: | Line 39: | ||
| If any //$(objects)// has to be build, then //obj// has to be build first. | If any //$(objects)// has to be build, then //obj// has to be build first. | ||
| But if //obj// is out of date or missing, this doesn't force //$(objects)// to built. | But if //obj// is out of date or missing, this doesn't force //$(objects)// to built. | ||
| + | |||
| + | |||
| <code make> | <code make> | ||
| $(objects): | obj | $(objects): | obj | ||
| Line 49: | Line 60: | ||
| It can be useful, when target needs to be updated and command to update target depends on which prerequisite file caused the update. | It can be useful, when target needs to be updated and command to update target depends on which prerequisite file caused the update. | ||
| - | <code makefile> | + | <code make> |
| all:: | all:: | ||
| </code> | </code> | ||
| Line 55: | Line 66: | ||
| Another scenario is to find source .c file in different dirs | Another scenario is to find source .c file in different dirs | ||
| - | <code makefile> | + | <code make> |
| build/%.o:: test/%.c | build/%.o:: test/%.c | ||
| $(COMPILE) $(CFLAGS) $< -o $@ | $(COMPILE) $(CFLAGS) $< -o $@ | ||
| Line 70: | Line 81: | ||
| * if no prereq, command is always executed | * if no prereq, command is always executed | ||
| * Order of execution is not guaranteed | * Order of execution is not guaranteed | ||
| - | |||
| - | === macros === | ||
| - | |||
| - | * *$(dir /path/to/file.txt)* get path part only | ||
| - | * *$(basename src/foo.c src-1.0/bar hacks)* - produces the result ‘src/foo src-1.0/bar hacks’. | ||
| - | * *$(notdir src/foo.c hacks)* - result ‘foo.c hacks’. | ||
| - | |||
| ====== Parallel make ====== | ====== Parallel make ====== | ||
| Line 84: | Line 88: | ||
| For whole file: <code makefile>.NOTPARALLEL:</code> | For whole file: <code makefile>.NOTPARALLEL:</code> | ||
| For single target: | For single target: | ||
| - | <code makefile> | + | |
| + | <code make> | ||
| .NOTPARALLEL: %.a | .NOTPARALLEL: %.a | ||
| .NOTPARALLEL: foo.c bar.c | .NOTPARALLEL: foo.c bar.c | ||
| </code> | </code> | ||
| - | [[https://stackoverflow.com/questions/8496135/parallel-makefile-requires-dependency-ordering|Parallel makefile requires dependency ordering | + | [[https://stackoverflow.com/questions/8496135/parallel-makefile-requires-dependency-ordering|Parallel makefile requires dependency ordering]] |
| - | ]] | + | |
| ===== Prevent one target from parallel run ===== | ===== Prevent one target from parallel run ===== | ||