In your example, the TMP variable is set (and the temporary directory created) whenever the rules for out.tar are evaluated. In order to create the directory only when out.tar is actually fired, you need to move the directory creation down into the steps: out.tar : $(eval TMP := $(shell mktemp -d)) @echo hi $(TMP)/hi.txt tar … Read more
make is a GNU command so the only way you can get it on Windows is installing a Windows version like the one provided by GNUWin32. Anyway, there are several options for getting that: The most simple choice is using Chocolatey. First you need to install this package manager. Once installed you simlpy need to … 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
Lazy Set VARIABLE = value Normal setting of a variable, but any other variables mentioned with the value field are recursively expanded with their value at the point at which the variable is used, not the one it had when it was declared Immediate Set VARIABLE := value Setting of a variable with simple expansion … Read more
When you run make, add VERBOSE=1 to see the full command output. For example: cmake . make VERBOSE=1 Or you can add -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON to the cmake command for permanent verbose command output from the generated Makefiles. cmake -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON . make To reduce some possibly less-interesting output you might like to use the following options. The … Read more
You can do it using shell with a sequence like <program>& pid=$! sleep $time_limit if ps aux | grep $pid | grep -v grep > /dev/null then kill $pid echo “Time limit exceeded” fi Here are two examples with and without reaching the time limit (using sleep 10 and sleep 3 as program, with a … Read more