Makefile escape colon Try this: Mar 3, 2025 · Unraveling Single-Colon and Double-Colon Rules in Makefiles. Macros. The shell function is one of the two most common ways to communicate with the outside world in a Makefile (the other being environment variables). A rule generally looks like this: targets: prerequisites command command command. Stack Exchange Network. In the case of makefiles, a makefile that has a double-colon rule with commands but no prerequisites will be remade every time make is run, and then again after make starts over and Makefile Syntax. 1. From: : Paul Smith: Subject: : Possible solution for special characters in makefile paths: Date: : Thu, 20 Feb 2014 03:22:39 -0500 Nov 25, 2018 · If you want to escape these characters you can use \ backslash. Commands. hpp -o -name \. , there isn't any way to escape characters in '' strings). This value will be expanded when it is used. It shows what is pre-interpreted. In total, three backslashes should work: Suppose that a makefile uses the VPATH variable to specify a list of directories that make should search for prerequisite files (see VPATH Search Path for All Prerequisites). In the case of makefiles, a makefile that has a double-colon rule with a recipe but no prerequisites will be remade every time make is run, and then again after make starts over and reads Sep 25, 2021 · How to take variables from another Makefile in shell script. Remove the \ and it should work fine. For example: HELLO = world HELLO_WORLD = $(HELLO) world! Aug 20, 2020 · The problem is that there isn't any need to escape characters in '' strings. The targets are file names, separated by spaces. $ Mar 26, 2021 · How do I properly escape a the shell expansion syntax $() in a Makefile? @if [ `find myDir -type f -not -name '. I used different escape character combination to pass comma as text message like \, /, $$, ',' "," but nothing works When you run make with no arguments, it searches first for a file named makefile, or, if there is no file by that name, Makefile. , using single quotes, using a single back-slash, using a double-backslash). However, the cases where double-colon rules really make sense are those where the order of executing the recipes would not matter. For a sample, see Sample makefile. Make: multiple $ signs. Here is CMake's escape characters documentation for reference. Though you have to escape each single apostrophe in the string too. In this tutorial, we’ll understand the meaning and usage of $$ in a Makefile with examples to illustrate them. Makefiles, a key component for automating builds and project management, come with their quirks, especially when it comes to rule definitions. Escaping colons in filenames in a Makefile. What are double-colon rules in a Makefile for? 10. Mar 27, 2014 · First you create the two white-space separated lists, either using your method, or thiton's. So you're getting a literal \ before the # in blah. This example shows how to tell the C compiler to search for header files in the same list of directories. openapi. Escaping the colon with \:, as you did, should work. Try: Because dollar signs are used to start make variable references, if you really want a dollar sign in a target or prerequisite you must write two of them, ‘$$’ (see How to Use Variables). Each double-colon rule is processed individually, just as rules with different targets are processed. Apr 24, 2009 · colon in makefile. The simple makefile example shows a variable definition for objects as a list of all object files (see Variables Make Makefiles Simpler). A directive is an instruction for make to do something special while reading the makefile. A makefile contains: Description blocks. In the case of makefiles, a makefile that has a double-colon rule with a recipe but no prerequisites will be remade every time make is run, and then again after make starts over and reads Dec 11, 2014 · supposed I have a makefile with show method show:: echo $(VAR) It would output foobar when execute make VAR=foobar show as expected. e. Here's some test that works with a simple Makefile: Mar 18, 2024 · When the make program processes a Makefile, it executes the commands according to the dependencies and targets specified in that Makefile. yaml'"; \ find myDir -type f -not -name '. I did a Google search for correct ways to escape; none of the escape-syntaxes which I came across seem to work (i. Handling % is no big deal, same as colon. Preprocessing directives. yaml'; \ To avoid this, the dollar sign needs to be escaped. These include: Reading another makefile (see Including Other Makefiles). If it is out of date, make extracts the latest version. Double-colon rules are explicit rules written with ‘::’ instead of ‘:’ after the target names. Am running bash on LXDE (Ubuntu 14. The only problem is that it you can't second-expand (read about . – Jim Monte. inc $(PATH)/bar. The annoying thing is that different characters need to be escaped in different contexts: for example in a target context you do NOT want to escape ;, but in a prerequisite context you MUST escape ;. Jul 9, 2010 · Sometimes you find yourself needing to insert a special character in a Makefile: perhaps you need a newline inside a $(error) message, or a space character in a $(subst) or a comma as the argument to a GNU Make function. This subtle distinction can lead Sep 30, 2021 · In this article. yaml' | wc -l ` != 0 ]; then \ echo "All files must end with '. c, which prevents the C preprocessor from noticing it as a directive. Add a comment | 18 Simple echo in makefile escape issue. Sep 8, 2012 · I am seeing a number of rules in a Makefile that look like this: $(PATH)/foo. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. NMAKE supports other features, such as wildcards, long filenames, comments, and escapes for special characters. 2 of the GNU make manual to create a variable holding a single space, and one holding a comma. Commented Jan 28, 2020 at 6:05. Dot directives. I didn't try to think up all the possible special characters, just used the ones in the question. If the makefiles specify a double-colon rule to remake a file with commands but no prerequisites, that file will always be remade (see section Double-Colon Rules). Nov 4, 2021 · For these, you should escape with a backslash: "\#". They are all literal, including the \ (i. One such curiosity is the difference in behavior between single-colon rules (:) and double-colon rules (::). SECONDEXPANSION:) variables with such an escaped semicolon, or the semicolon will stay in the pathname. The double-colon rules for a target are executed in the order they appear in the makefile. inc:; include $(PATH)/bar. I prefer the single apostrophe since it is not processed. Inference rules. May 4, 2018 · I can't figure out how to escape the dollar sign in order to access a variable defined in an environment in docker, when executing the command from a makefile. Jan 22, 2020 · In short, you need more escape characters to propagate the semicolons through to the test environment. . This little escape function we’ve defined is actually sufficient to deal with the output of the shell function safely. hxx \)) I would be very surprised if the original command works in bash without quoting those characters, if you run it from the same directory containing the same contents as make. 0. 54. Related. 28. Feb 26, 2023 · If the makefiles specify a double-colon rule to remake a file with a recipe but no prerequisites, that file will always be remade (see Double-Colon Rules). How to escape backslash in Feb 26, 2023 · If the makefiles specify a double-colon rule to remake a file with a recipe but no prerequisites, that file will always be remade (see Double-Colon Rules). Jan 6, 2019 · Running make with the following Makefile will instantly exit: a = $(shell sleep 3) Running make with the following Makefile will sleep for 3 seconds, and then exit: a := $(shell sleep 3) In the former Makefile, a is not evaluated until it's used elsewhere in the Makefile, while in the latter a is evaluated immediately even though it's not used. inc:; include $(PATH)/foo. If either of these files is under SCCS control, make checks the makefile against its history file. 5. If the variable already had a value, it is replaced. inc Is the semi-colon at the end of the rule definition a no-op or does it have a particular meaning? Using = causes the variable to be assigned a value. A Makefile consists of a set of rules. This is a minimal representation of my Apr 23, 2019 · Now if run makefile like: $ make help It prints $ He lives in Paris instead of $ He lives in Paris, does not he? I know in makefile comma uses as argument separate, but how I can make it as printable. Specifically, use a double backslash \\ to escape an extra backslash into the list, along with the \; escaped semicolon. h -o -name \. Then you use the little trick from the end of section 6. 2 "cp: target '’ is not a directory" during while loop. They are handled differently from ordinary rules when the same target appears in more than one rule. 04). Try to debug this command using "set -x" (which you can switch off using "set +x"). I'll Rewrite your function to escape your glob statements, like this: MY_HEADERS := $(shell find $(INCLUDE_PATHS) -type f \( -name \*. qpwq lltees ywgadht tmk ryeojzd zklbv pqdakh yydvj qtaqdk bwf bzyfnu sxgnnz rkgpm lfjll yuy