Makefile conditionally set variable
Web9 jul. 2024 · In GNU make, conditional parts are used e.g. like this. ifeq ($(CC),gcc) $(CC) -o foo $(objects) $(libs_for_gcc) else $(CC) -o foo $(objects) $(normal_libs) endif The … Web26 nov. 2024 · Using the Conditional Variable Assignment Operator (?=) Now that we understand the basics of using a variable in a Makefile , we’ll be more comfortable …
Makefile conditionally set variable
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WebConditional Assignment (GNU make) 6.2.4 Conditional Variable Assignment There is another assignment operator for variables, ‘ ?= ’. This is called a conditional variable … Web9 okt. 2016 · Makefile の特殊変数・自動変数の一覧 Oct 9, 2016 on Makefile Makefile でよく使う、特別な意味を持つ変数（自動変数）の備忘録です。 具体的には $@, $<, $^, $?, $+, $* と、暗黙ルールで使われる変数（ $ (CXX), $ (RM) など）についてです。 $@ ターゲット名。 aaa/bbb/foo: @ echo $@ # => aaa/bbb/foo @ echo $ (@D) # => aaa/bbb @ …
Web1 sep. 2024 · Sorted by: 31. You need to remove the dollar around toto, and also pass toto from the command line differently. Command line. make toto=1 my_test. Makefile. … Web"Often you want to test if a variable has a non-empty value. When the value results from complex expansions of variables and functions, expansions you would consider empty …
WebIt follows that syntactic units of the makefile, such as rules, may safely be split across the beginning or the end of the conditional. make evaluates conditionals when it reads a … http://plrg.eecs.uci.edu/git/?p=firefly-linux-kernel-4.4.55.git;a=blob_plain;f=scripts/checkpatch.pl;hb=c8d17b451aa18b07b60e771addf17a5fdd4138c7
Web#!/usr/bin/perl -w # (c) 2001, Dave Jones. (the file handling bit) # (c) 2005, Joel Schopp (the ugly bit) # (c) 2007,2008, Andy Whitcroft (new conditions, test suite ...
Web5 jul. 2024 · I'm trying to achieve something like this: If user will run make build_x version=1.0 then show Building version 1.0, else (make build_x without version param) … novant health foundation brunswickWeb+ dnl AC_PATH_XTRA only defines the path needed to find the X libs, not the libs how to slow the cooling of waterWeb27 aug. 2024 · But from there, you cannot set a variable that applies elsewhere in the Makefile. Muhammad Soliman over 3 years Thanks @RolandWeber for your comment, … novant health fort mill scWebThe most basic rule of GNU Make and the environment is that any variable set in the environment when GNU Make is started will be available as a GNU Make macro inside … novant health foundationWeb28 feb. 2024 · Check out the examples below to see how to set variables within a Bash script. When you set a variable to execute a command, the command will be executed … novant health foxcroft fairview rdWeb5 jul. 2024 · It sets version to - if unset, then fills in version_info appropriately. Using target-specific variables, and a one-liner variant: build_x: version ?= - build_x: version_info = $ (if $ (version:-=),$ (version),latest) build_x: @echo version_info = $ (version_info) This works as follows (see the overall GNU Make documentation ): novant health forsyth medical center npiWeb6 aug. 2015 · 31. I have a Makefile target, in which I have to check the value of an environment variable. But, I don't get the exact syntax of it. Tried hard, but can't find it. … novant health founded