There are various problems with doing the sub-make inside a for loop in a single recipe. The best way to do multiple subdirectories is like this: SUBDIRS := $(wildcard */.) all: $(SUBDIRS) $(SUBDIRS): $(MAKE) -C $@ .PHONY: all $(SUBDIRS) (Just to point out this is GNU make specific; you didn’t mention any restrictions on the … Read more
Variables defined with := in GNU make are expanded when they are defined rather than when they are used.
You need to precede the lines starting with gcc and rm with a hard tab. Commands in make rules are required to start with a tab (unless they follow a semicolon on the same line). The result should look like this: PROG = semsearch all: $(PROG) %: %.c gcc -o $@ $< -lpthread clean: rm … Read more
You could use the filter-out text function if you’re using GNU Make. OTHERVAR := $(filter-out SomethingElse,$(VAR))
Explanation Inside directory C:\MinGW\bin there is an executable file mingw32-make.exe which is the program make you are trying to run. You can use the keyword mingw32-make and run the program make since you have added the needed directory to the system path, but it is not an easy to remember keyword. Solution Renaming the file … Read more
make -qp | awk -F’:’ ‘/^[a-zA-Z0-9][^$#\/\t=]*:([^=]|$)/ {split($1,A,/ /);for(i in A)print A[i]}’ Taken from the make arg completion, which works like a charm.
Substituting extensions in a list of whitespace-separated file names is a common requirement, and there are built-in features for this. If you want to add an x at the end of every name in the list: FILES_OUT = $(FILES_IN:=x) The general form is $(VARIABLE:OLD_SUFFIX=NEW_SUFFIX). This takes the value of VARIABLE and replaces OLD_SUFFIX at the … Read more
I’ve run my home project on my 4-core with hyperthreading laptop and recorded the results. This is a fairly compiler-heavy project but it includes a unit test of 17.7 seconds at the end. The compiles are not very IO intensive; there is very much memory available and if not the rest is on a fast … Read more
I would try something along these lines FLAC_FILES = $(shell find flac/ -type f -name ‘*.flac’) MP3_FILES = $(patsubst flac/%.flac, mp3/%.mp3, $(FLAC_FILES)) .PHONY: all all: $(MP3_FILES) mp3/%.mp3: flac/%.flac @mkdir -p “$(@D)” @echo convert “$<” to “$@” A couple of quick notes for make beginners: The @ in front of the commands prevents make from printing … Read more
‘gmake’ refers specifically to GNU make. ‘make’ refers to the system’s default make implementation; on most Linux distros this is GNU make, but on other unixes, it could refer to some other implementation of make, such as BSD make, or the make implementations of various commercial unixes. The language accepted by GNU make is a … Read more