Gnu make manual patsubst

 · GNU Make Manual. Free Software Foundation. last updated Janu. This manual (make) is available in the following formats: HTML (K bytes) - entirely on one web page. HTML - with one web page per node. HTML compressed (K gzipped characters) - entirely on one web page. HTML compressed (K gzipped tar file) - with one web page per . override CFLAGS += $(patsubst %,-I%,$(subst:,$(VPATH))) The effect is to append the text `-Isrc -I../headers' to the previously given value of CFLAGS. The override directive is used so that the new value is assigned even if the previous value of CFLAGS was specified with a command argument (see section The override Directive).  · I strongly disagree. The rules for $(patsubst pattern,replacement,text) when there is a % in the pattern, are: 1)If text is empty OR rendered empty after variable-expansion, then, the function expands - always - to an empty string. 2) If, text is non-empty, then if it contains WS, then first split up words, effectively getting rid of all white-space, and then do - per each argument - Reviews: 4.

Functions - Managing Projects with GNU Make, 3rd Edition [Book] Chapter 4. Functions. GNU make supports both built-in and user-defined functions. A function invocation looks much like a variable reference, but includes one or more parameters separated by commas. Most built-in functions expand to some value that is then assigned to a variable or. Here is a realistic example of the use of subst and patsubst. Suppose that a makefile uses the VPATH variable to specify a list of directories that make should search for prerequisite files (see section VPATH Search Path for All Prerequisites). This example shows how to tell the C compiler to search for header files in the same list of directories. Makefileの関数. 自分用にずっとまとめようと思って、下書き保存して温めていたMakefile関連です。. 使う機会が少ないのでMakefileの関数はどうも慣れない＆上手く活用できない。. そして毎回調べる。. リファクタをする時のために調べた結果をまとめておき.

Global substitution in a string is done by patsubst: Builtin: patsubst (string, regexp, [replacement]) Searches string for matches of regexp, and substitutes replacement for each match. The syntax for regular expressions is the same as in GNU Emacs (see Regexp). The parts of string that are not covered by any match of regexp are copied to the expansion. If you want to do wildcard expansion in such places, you need to use the wildcard function, like this: $ (wildcard pattern ) This string, used anywhere in a makefile, is replaced by a space-separated list of names of existing files that match one of the given file name patterns. If no existing file name matches a pattern, then that pattern. override CFLAGS += $(patsubst %,-I%,$(subst:,$(VPATH))) The effect is to append the text `-Isrc -I../headers' to the previously given value of CFLAGS. The override directive is used so that the new value is assigned even if the previous value of CFLAGS was specified with a command argument (see section The override Directive).