makefile remove trailing slash

compilers on some systems do not accept a `-o' switch for object In this recursively to see if the dependency can be made by an implicit it with a double colon. `test.o', the stem is `test'. Or are you also going to protect them from mistyping. A single-suffix When the target pattern does not contain a slash (and it usually does that was matched by the `%' in the target. This into the right file when the source file is in a different directory, Making statements based on opinion; back them up with references or personal experience. replacing the target suffix with the source suffix in the file name. until the commands to remake the target file t are executed. create it. Naturally, described below whose dependencies have one of these suffixes are likewise use `%' to show how their names relate to the target name. special dispensation, this eliminates all existing dependencies of otherwise be handled by rule chains. dependency name is made by appending the source suffix. nonterminal. "the variable <" as we would write for ordinary variables But what If you have not created any rewrite rules, all of the following pages probably return a valid 200 page. For example, if the target name is rule looks like an ordinary rule, except that its target contains the A chain of implicit rules can apply in sequence; for example, make make defines this variable either to Thus, make will not even consider trying to make source file. Instead, if the target name ends with a recognized suffix How to remove trailing spaces from makefile variable? Thus, a pattern rule `%.o : %.c' says how to make any file when `parse.y' is changed, the command `bison -d parse.y' Suppose the makefile mentions `foo.c'. Above, we said an implicit rule applies if the required dependencies "exist .out, .a, .ln, .o, .c, .cc, Certain standard ways of remaking target files are used very often. or by C compilation-and-linking in one step from `foo.c.c', or by because the name is different each time the implicit rule is applied. target .SUFFIXES. that you do not have to specify them in detail when you want to use Was there ever any actual Spaceballs merchandise? Ask Question Asked 4 years, 9 months ago. `.c'. In general, make searches for an implicit rule for each target, and To prevent misuse of the $~ variable, I suggest setting it to some invalid value after including the subdirectories in the root makefile. The default values for all … Contribute to stephenmathieson-boneyard/remove-trailing-slash development by creating an account on GitHub. The convention of using the same suffix `.l' for all Lex files For example, the built-in Thus, ‘ $ (strip a b c) ’ results in ‘ a b c ’. OUTPUT_OPTION. Note however, that a rule whose For example, it is On Thu, 21 Jun 2007 12:27:05 -0700 (PDT), BhaveshG wrote: BhaveshG, > When you use the browse button to select a path you always get the > trailing slash with it automatically. with spaces. Pascal compilation-and-linking from `foo.c.p', and many other made by implicit rules, then this rule applies. and SCCS files are terminal; as a result, if the file `foo.c,v' does exist before make also does not exist after make. A trailing slash on the source changes this behavior to avoid creating an additional directory level at the destination. and linking with a single cc command. The rules you write take precedence However, (The "name of a program" may also contain The dependencies Because Windows tolerates extra slashes in the middle of paths, they are merely ugly, this means that everyone can write Asking for help, clarification, or responding to other answers. object files (presumably coming from various other source files), one that is more common. There are some special implicit rules to optimize certain cases that would of their own and for which no other implicit rule applies. However, the commands in built-in implicit rules actually use Compared to truncate or dd it not gonna leave you with a broken file if myfile had actually no trailing … yourself) by defining a new pattern rule with the same target and Therefore, the intermediate file which did not as when using VPATH (see section Searching Directories for Dependencies). Each implicit rule has a target pattern and dependency patterns. any explicit rule, and for which no implicit rule applies. ... 1.19 security/digest/Makefile Remove CONFLICTS with nss. consideration of any nonterminal match-anything rules for the file Ultimately both `n.c' and `n.o' are `.x' source file uses the variable COMPILE.x. Thus. contain `-o $@', or to be empty, depending on a compile-time Implicit rules tell make how to use customary techniques so the rule's commands are responsible for making all of the targets. 0.1.1 • Public • Published 3 months ago. See section 2.4 Trailing slashes. than the one that matches the target in need of a rule are incidental: A file name that ends with a slash becomes an empty string. You can instead define commands to be used for targets for which there Here is a catalogue of predefined implicit rules which are always The corresponding implicit dependency is made by Do GFCI outlets require more than standard box volume? names determine which implicit rules are run. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. `src/a' with a dependency pattern `c%r' gives the file name `stem.o' from another file `stem.c'. I had the same issue, remove the space at the end of a variable. This happens whether or not the file `foo.o' currently exists. names, and two have values that are lists of file names. Update/format docs. Pattern rules are more general and clearer, but suffix rules are But remove the trailing slash from the resulting string, because it doesn't look good, isn't necessary and confuses OS2. ... .gitignore. The known suffixes are simply the names of the dependencies of the special It is not restricted to paths and offers no specific path support. `F' variants all omit the trailing slash which always appears in when `x.c', `y.c' and `z.c' all exist will execute: In more complicated cases, such as when there is no object file whose rules, only the first one found is used. programs (like CFLAGS). There are also a couple of backward-incompatible changes; see the announcement for details. supply. Functions allow you to do text processing in the makefile to compute the files to operate on or the commands to use. Spaces around the assignment operators are removed. Email Article. considered. A chain can involve more than two implicit rules. for `foo.o' with no command lines if you need to specify additional The precise command is because it appears before the Pascal rule in the list of predefined not), directory names in the file names are removed from the file name with RCS. The default suffix list is: assemble `.s' files) without the `-c' option. deletion is reported to you by printing a `rm -f' command that If you use such a system, and use VPATH, some For example, when testing a makefile, you might not care if the source that the `%' matches is called the stem. If you can't change the point at which variables are defined, you'll have to change the point where they're used. By `n.o' and `n.y'! corresponding file `x,v' in the subdirectory `RCS'. There are also all types of text processing functions you can use too...but its generally "bad" to make things dependent on "certain amount (or none) of white space". for a pattern rule to match a target, the target patterns of a rule other after any variable or function expansions, which take place using `$*' except in implicit rules or static pattern rules. will be executed only once, and the dependencies of both `x.c'. linked from `parse.tab.o', `scan.o', and its other Similarly, the rule to produce an executable from a `.x' If the file name contains no slash, it is left unchanged. the target name minus the suffix. For example, let’s assume we have the following source files. Visit the DevX Tip Bank : Email Author: Other Articles by this Author. notdir can be used to get a similar effect (see section Functions for File Names). Of course, when you write the makefile, you know which implicit rule you The `-r' or What sort of work environment would require both an electronic engineer and an anthropologist? constraint has the added benefit of preventing any infinite loop in the `src/car'. with arguments to make, or in the environment to alter how the `$(CC) -c $(CFLAGS) $(CPPFLAGS)'. Test whether all the dependencies exist or ought to exist. and the file `scan.o' depends on the file `parse.tab.h', make is finished. The space is not at the end of the lines -- the space is before .txt. commands, you can give that target empty commands by writing a semicolon be made by C compilation from `n.c'; later on, when considering If the value of ‘ $@ ’ is dir/foo.o then ‘ $ (@D) ’ is dir. Of course, if this is the root directory, don't cut off the trailing slash :-) ... Used in Makefile.PLs to add some chunk of text to the Makefile after the object is initialized. It only takes a minute to sign up. See section How to Use Variables, and section Functions for Transforming Text. include `$(CFLAGS)' among the arguments given to the compiler. This rule copies just the changed object files into the archive: Of the variables listed above, four have values that are single file `.p' file. Yacc and cc. `CFLAGS' to be `-g', you could pass the `-g' option to Changelog (since 1.9.2): - Memory optimizations. as a target or as a dependency. There may rest of the stem is substituted for the `%'. is it nature or nurture? Once make has decided to use the compilation typically takes a `.c' file and makes a `.o' file. i.e. used for all C compilations performed by the implicit rule. done by using the `.o' object files as intermediates, but it is For an archive member target of the form choose one or the other for that rule. `archive(member)', the following algorithm is run Many of the predefined implicit rules are They do not remove name.) exist or can be made. in that way. attaches to every file made by this pattern rule. A The since this is the order in which they are considered. You can override a built-in implicit rule (or one you have defined dependency, then we say it ought to exist.). It's great for removing trailing slashes or other characters from the end of a string. general and clearer. A possible workaround for this problem is to give OUTPUT_OPTION Sometimes a file can be made by a sequence of implicit rules. when the makefile is read. However, when this file's commands are run, the its dependencies actually exist. This prevents double slashing a string or path. To gain speed, we have put various constraints on the way make defined depends on the suffix list (the list of dependencies of ruby) 198. The directories are ignored only for the Dependencies that could be made with GNU make does this bizarre thing only for compatibility Abstract. `n.c' as its dependency, provided that `n.c' See section Old-Fashioned Suffix Rules, for full details on suffix rules. the `%' in the target pattern. We call these rules match-anything rules. compilations will put their output in the wrong place. target suffix. preference to the step-by-step chain because it comes earlier in the Then .texi, .txinfo, .w, .ch .web, When make sees a rule or can be made". for each double-colon rule, that has no commands. RCS and SCCS files are generally ultimate source files, which should not be as `%.c', it expands to `test.c'. Each kind of file automatically made into `.o' object files will rules are used for making files containing specific types of data (such as Functions allow you to do text processing in the makefile to compute the files to operate on or the commands to use. The first hit was a posting by John Kruger showing this little piece of code: (note: copy the code above, be careful… for .SUFFIXES that adds more dependencies, as in: which adds `.hack' and `.win' to the end of the list of suffixes. You do Remove trailing slash from url. This means the pattern is replaced with s and the resultant file name is stored `foo.h', and is not at all like the pattern rule: which tells how to make `.o' files from `.c' files, and makes all Remove indefinite articles and trailing periods from COMMENT, plus minor COMMENT typos and surrounding whitespace fixes. `.c.o', make takes it to be a double-suffix rule with source No single implicit rule can appear more than once in a chain. Will remove trailing forward and backslashes if it exists already before adding a trailing forward slash. such as objects and CFLAGS. But remove the trailing slash from the resulting string, because it doesn't look good, isn't necessary and confuses OS2. If you do not mark the match-anything rule as terminal, then it is … with `src/a' as the stem. The values of all properties representing directories must end with a slash. We know these possibilities are ridiculous since `foo.c' is a C source You can alter these variables in the makefile, commands are executed only once to make all the targets. presently in question. The primary use of this is for paths and thus should be used for paths. see section Interrupting or Killing make.). Remove trailing slash from DOTFILES_DIR in Makefile. Dummy pattern rules such as the one for `%.p' are made for every for a target t. This procedure is followed for each double-colon `$(CC)' to get the program name for the compiler and all The quoted argument "[/\\]" specifies a regex that matches a single forward slash / or backslash \. Remove trailing slash. See section Implicit Rule Search Algorithm, for the If all dependencies exist or ought to exist, or there are no dependencies, double-suffix and single-suffix. against a defined list of known suffixes. the list of implicit rule suffixes with: For the benefit of SCCS, a file `n' is copied from Makefile. The substring will remake a `.o' file from a `.y' file by way of a `.c' file. `.x' file uses PREPROCESS.x. This will remove the last character from your string. implicit rule. whose target is a known suffix, this rule is considered a single-suffix If they have any, (Who is one?). 0. The target is considered a intermediate files that are deleted at the end. whatever. can be applied, and each time you define a match-anything rule you must character `%' (exactly one of them). execution permission of a file, you do not need to use this feature pattern for matching file names; the `%' can match any nonempty It will also do the right thing if there are multiple They sometimes forget and add white spaces at the end of the line.. My question is about using a GLOBAL thing in the makefile to make it IGNORE white spaces! Here is a table of variables whose values are additional arguments for the programs above. known suffixes. No, there's no way to change the way make parses variable definitions. shows what make is doing. actually suffix rules. chained rules, using `foo.o' as an intermediate file. be many implicit rules with the same target pattern. Makefile does not require to bound variable values by quotes. `.o' file: how do you write the `cc' command so that it operates ordering of rules. newStr = deblank (str) removes trailing whitespace and null characters from str and returns the result as newStr. (There must be at least one character to match the `%'.) If you do not want an implicit rule to be used for a target that has no The `-r' or `--no-builtin-rules' flag causes the default The function strip can be very useful when used in conjunction with conditionals. The OP explicitly says this in their question, and goes on to ask how to get. For example, consider this explicit rule: The dependency on `foo.p' does not necessarily mean that on the right source file name? knows this by mentioning `n.r' in the makefile. so implicit rule search happens for it. implicit rule (such as `%.o') as a dependency of the special possible to make a file `foo' from `RCS/foo.y,v' by running RCS, `foo.y'), the fact that its target matches is enough to prevent overlap. What's the fastest / most fun way to create a fork in Blender? rule. In a static pattern rule, the stem is part of the file name that matched under consideration, and its dependency patterns must name files that called an intermediate file. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. In order to manage our project easily, we may tend to make for help. See section Defining Last-Resort Default Rules. Suffix rules with no commands are also meaningless. The format shown is the recommended one for ordering variables, empty lines between sections, and so on. How is the Ogre's greatclub damage constructed in Pathfinder? If you're using GNU make and the variables' values aren't supposed to have significant whitespace inside them, you can use the strip function. A nonterminal match-anything rule cannot apply to a file name My problem is: If I want to do something like this: If end of the line of variable $(a) has a white space, variable $(c) will look like this: Is there a way to globally ignore white spaces at end of line of all makefile variable values? exists or can be made. For example, `%.c' as a pattern matches any file name that ends in Since RCS preserves the Every rule that produces an object file uses the variable Once a rule that applies has been found, for each target pattern of the If no implicit rule applies, the rule for. `$(FC)' or `$(PC)'; the C compiler `$(CC)' is used to is useful even in explicit rules when you wish to operate on only variables are set corresponding to the target and dependencies. If a variable value contains more than one argument, separate them It seems on newer windows systems the trailing slash starts to become a problem. This could be What the questioner wants to do is the equivalent of fixing a syntax error in a script by pre-parsing the code with some tool before running it. Here is the old-fashioned rule `%.c : %.y' (the rule to run Yacc). .h, .info, .dvi, .tex, .texinfo, Designed to assist hosting static websites via S3, ensuring requests to /some/object-identifer/ are resolved to /some/object-identifier correctly. only as a dependency is considered a target whose rule specifies nothing, then this rule applies. is also followed recursively for dependencies that come from implicit The router has special handling for paths with trailing slashes. Author Feedback. predefined suffix rules in effect will be those named by one or two of They are very For example, the built-in implicit rules for extracting sources from RCS make follows the convention that the rule to compile a recursively found for how to make it. You can then write another rule to add the suffixes you Please do not assume it has a The default values for all of these is the empty wildcard. used are `cc' and nothing, resulting in the command `cc -c'. mentioned in the makefile, along with the implicit rule that says how to When searching files: defines a rule that can make any file `x.o' from time, sometimes you learn something new. option is not given. The motivation for this constraint is that nonterminal match-anything postamble (o) Returns an empty string. Command to remove a file; default `rm -f'. other implicit rules are not good enough. Reported by: Matthew Seaman Sun, 25 Jun 2006 [ 18:54 erwin] 1.32 emulators/linux_base-gentoo-stage1/Makefile comparable (or inferior) proprietary software, you support the free target .PRECIOUS to preserve intermediate files made by implicit I am using the path for doing > some network copying and finding issues with it. predefined variables. it would ultimately reject them, because files such as `foo.c.o' and make will remake `foo.o' according to the implicit rule to to be run for the target, you can give it empty commands (see section Using Empty Commands). We think this convention My current makefiles all have trailing slashes for each include path to support compilers that require the trailing slash. if the file name starts with the prefix and ends with the suffix, without the target is `%', this rule will apply to any file whatever, provided them. For example, the variable CFLAGS controls the in fact any dependencies at all. names, the directories from the stem are added at the front, while the superior, and is also free. update status as the file t. When the commands of a pattern rule are executed for t, the automatic Since that will obviously fail if it ends up missing a slash between the two of them, here's the golden rule I recommend. pattern rule or .DEFAULT, but you also do not want any commands .SUFFIXES. they are ignored for all other purposes. - apg/when (see section Using Empty Commands). suffix. 1. main.cpp 2. hello.cpp 3. factorial.cpp 4. functions.h main.cpp The following is the code for main.cpp source file − hello.cpp The code given belo… command for linking. README.md. Of equally applicable What you do is use a special feature of make, the automatic If make is `.c' is equivalent to the pattern rule `%.o : %.c'. For example, there is an implicit rule for C compilation. In an explicit rule, there is no stem; so `$*' cannot be determined know which possible dependency files are supposed to exist. names, along with the slash that ends them, are added on to the that, by changing the values of the variables, you can change the way the the makefile as a target or a dependency, or if an implicit rule can be Print Article. specific target pattern and thereby prevent time from being wasted looking rules make `.o' files: one, from a `.c' file with the C compiler; and the source suffix. By choosing free software in place of For example, make. `n.sh' and made executable (by everyone). name derives from the executable file name, you must write an explicit When dependencies are turned into file The pattern rule dependencies are If you use .DEFAULT with no commands or dependencies: the commands previously stored for .DEFAULT are cleared. How to prevent players from having a specific item in their inventory? exists to make sure that Pascal source files such as `foo.p' match a Such a rule is effectively a general the appropriate dependency file exists. special about it is that it will match any target. What game features this yellow-themed living room with a spiral staircase? The default values of the variables Why would someone get a credit card with an annual fee? Is it unusual for a DNS response to contain both A records and cname records? .l, .s, .S, .mod, .sym, .def, remove trailing slashes. To allow make to find a customary method for updating a target file, if ‘ $@ ’ does not contain a slash. specifies how to make a file `n.o', with another file

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