Makefile multiple dependencies For example, one usually has a variable named objects containing a list of all the Defining dependencies in a makefile is essential for managing complex software projects with multiple files and components. 11 Multiple Rules for One Target. Since it should consist in several executables, with various dependencies, I wanted to write a simple makefile and understand properly its behaviour for replicating it in the future if needed. My src make file has the following targets. o'. Makefiles, targets as dependencies. Compiling multiple executables with make. I have a makefile consisting of several targets with some dependencies. For example: LINKER_SCRIPT := link. The sorces also have dependencies. Try it! I have. Viewed 481 times 0 . Automatic Dependency Generation. Basically, you just cd dirname; make. Remember that you shouldn't have a file with the same name as the module you're trying to build (e. o because you changed a file which was a dependency. project folder content: main. C Programming - Compiling with multiple . Update the flags near the top and create new entries in TARGETS and make a new xxx_SRC variable to add new targets. Basically I need to create a makefile to build my project from its sources. I have a makefile in src which has a target called tests. ld I would like to know if it's possible to pass a makefile target's dependency as an argument. Using make -j (as TheMorph says) is definitely the way to go. I googled for this solution but, all the solutions mentioned are for generating multiple deps files for multiple objects. o,${SPECIAL}): b. d: %. This can be achieved by using multiple lines in a Makefile. d file for each . out and file-b. file1. I've been working on this and I actually have figured it out. This is the structure of my project:-Project |-generic | |-include | |-src |-specific | |-include | |-src |-Makefile |-bin Here generic contains mainly interface classes (virtual), and files in specific may depends on those. cpp,$^). It is obvious that this object file depends on the source file fileA. 10. file2. It's similar to the approach of using a . At that time, there are no files matching *. mjs recipe does not specify any targets, just a template for discovering the prerequisites of targets that you specify otherwise, with a recipe for making those targets from the prerequisites. For the compiling rule where the . c files and 1 . o. Target and dependency are both the same. 0 Make file for multi-directory project. deb from z/ The following looks fine, but it don't find the prerequisite files: I want my Makefile to use $(VER) as a tag to retrieve a BOM from the repository, generate a dependency file to include in the Makefile, rescan including that dependency, and then build the product. cpp If the dependency file is newer than target file, target execute otherwise not execute. This means that you can do automatic dependency tracking with implicit rules and cut down your Makefile to the bare minimum like so (for a simple project with . The make command can name any file in the graph as the target to be built, e. How to specify optional dependencies for a makefile. (I am not posting an Answer because I have a good idea why you get Nothing to be done, but not why Make behaves the way it does when . After a lot of trials and errors, I found this is following as the simplest one. c and monter. Since this is the first rule listed, To recursively call a makefile, use the special $(MAKE) I'm trying to write a makefile that uses target-specific variables, but while the variables are set correctly in each target and prerequisite body, Makefile target with multiple dependencies. About; Products Makefile target dependencies: How to piece together a variable name. I have a Makefile that i want to use in parallel to compile a set of separate programs. Multiple Level of Dependencies in a Makefile. Understand: make will read and parse ALL the makefiles entirely FIRST before it starts to run any of the recipes. cpp does not have to be the first dependency. About; Products OverflowAI; GNU make: stem matching and multiple dependencies. C - Makefile with 2 . You can wreak havoc on your shell instance by declaring variables, and especially modifying state with set, inside of {}. Follow Makefile with multiple dependencies in directory tree. Then, create the following Makefile: prefix-%. so # target lib #TARGET_LIB += lib2. makefile compile multiple source files in one call. a small structure looks like following pgdynamic_setup: cd $ Make dependencies execute multiple times even though the dependency has been run explicitly beforehand. How to run a makefile that takes in all header files within a subdirectory. Improve this answer. so SRCS := lib1. h would be rebuilt even if if date. I was looking for Makefile options to access the "dependency files" to be used in a for loop, but COULD NOT find one. Makefile with multiple files always builds everything. Combining general dependencies with specific dependencies. com # SO: Header files are an important component of any software project as they contain declarations of functions, structures, and variables that are used in multiple source files. c files at once using a makefile. 6. h; monter_pci. All output and dependency files will be generated into build directory before making target in bin directory. But it will also depend on all the header files that this source file includes. Make Target dependent source list. c is the main file of my module. 2. One file can be the target of several rules. cpp' contain the main() function, include hold the *. Finally, the touch command makes sure that the . All these three files reside in the same directory along with other unused files as well. There can only be one recipe to be executed for a file. Simpler Makefiles then may be the result. Load Makefile with multiple dependencies in directory tree. Makefile: compile objects while learning make file I am trying to write a make file for multiple source directories it seems i am This is a Makefile fot separated multiple sources to build with BUILD_DIR}/%. Can someone help me? The files I have are file1. Makefile compiles all the files everytime. I'm trying to build multiple shared libraries in one makefile. However, I'd like that all . When Make is looking for a way to build objs/a. Consider the object file fileA. bar. cpp and d. o files depend on foo. c) exists. At the time make parses the rule print : *. Make to install dependencies in multiple projects Makefile. Ask Question Asked 6 years, 7 months ago. 12. Then the -j <n> option will start to build as many targets in parallel as are available, to the maximum given as <n>. Create 2 separate makefiles like this : # Makefile1. I agree that the terminology could be better. Makefile for Multiple . Pattern rule with partial dependency. This rule is conservative-- it assumes that every object depends on every header, so it will sometimes rebuild things unnecessarily. I'm trying to do the following in order to build components in the right order: makefile with multiple dependencies for a single file. GNU make - Target with several recipes where only one recipe is needed. AUTOMAKE_OPTIONS = foreign bin_PROGRAMS = helloworld helloworld_SOURCES = hello. h, like:. n. PHONY command: . Suppose source folder consists of The general solution is to create a target with name all at begin of Makefile: all: a b a b: echo a > a echo b > b . 4. How do I tell a Makefile which dependencies are satisfied by which target. You can make it better, either by hand if you know the real dependencies or automatically with a more advanced technique. Create dependency files in Makefile. o, $(notdir $(SRCS_SRC))) # (10)Dependency files # make looks for its instructions in a file named, by default, makefile or Makefile. EDIT 2: The only solution that comes to my mind to avoid dependencies is as follow. Makefile declares common tasks such as all, build, run and clean. More generally, my Makefile may have several targets -- A, B, C, etc. c How do we specify multiple source files (if there are multiple source files required to compile In the makefile of a program, one has to write rules that define the dependencies of each object file. I am referencing this sort of chart, but my program contains Here's an example dependency graph that you might build with Make. CC = gcc all: $(EXECS) clean: rm -f $(EXECS) However, I could not find any simple example for including one "include. h contains the declaration of my functions. See Static Pattern Rules. dot 01. Makefile dependent targets based on current target. mk . o’ file: how do you write the ‘cc’ command so that it operates on the right source file name?You cannot write the name in the recipe, because the name is different each time the implicit rule is If you create a good makefile, only the necessary rules (compiler/link commands) will run, which stands "to next" from the modified file in the dependency path. Modified 10 years, 11 months ago. o' file is both a target and a dependency. PHONY: clean cleanall Can I split it into multiple parts, as shown below? . If the dependency is a file name, but not a target in the makefile, the utility checks for the existance of the file, and if the file doesn't exist, the utility yells at you. g++ -MM <your file> will generate a GMake compatible list of dependencies. Makefile with multiple directories and dependencies. The dependencies don't expand properly, however; changing src/Foo. 3 Automatic Variables. Consider the following example ? For instance, one way is to use some external dependency generation to make numerous concrete rules of the form: foo. This sooner or later leads to wrong builds which you can only sort out with make clean. Each subdirectory contains random number of input csv files. @Manzill0 the following question has the same set of issues when dealing with multiple targets and their dependencies? %. CC=gcc CFLAGS=-Wall -g BINS=libsensorMotor. a. And if it's possible, how to do it. foo exists. Modified 6 years, 1 month ago. a @echo done $(CURDIR)/a. WAIT before_me Note that please_run_me & and_me are not ordered in relation to eachother, but both will finish before before_me starts. Skip to Note you need to be quite careful when embedding multi-line shell expressions in Avoiding multiple execution of a recipe when multiple dependencies are generated by the same I need this because I'd like to feed in individual dependency files as options to the build program. h files. You can only have one wildcard per recipe, Since your default make target only lists $(OBJECTS) as a dependency, the files in $(OBJECTS) will be the only ones that get built. It also solves your problem In the first makefile: f%ec: f%eb f%ec: f%ea cat $^ > $@ There are two different pattern rules which could match filec , so Make has to choose one (it doesn't realize it could apply both at the same time, and in principle they could both have commands). c, monter_pci. make determines which targets need to be built, in what order, so that the requested goal targets are up to date with respect to their dependencies. Passing target name to a dependency in makefile. The build has to create dirn/out/file. Hot Network Questions Supplying a reference to a bad former employee Makefile. I have tried loads of examples from all over the net and all complain that they are missing dependencies. h; monter_cdev. h in the code] file1. depend foo. Out of these four, I want the Makefile to only run the build command for the first three files i. c prefix-%-generated. o file dependency, if its not met. These . If you have a variable called TARGETS which holds the names of all . All the prerequisites mentioned in all the rules are merged into one list of prerequisites for the target. Share. 5. dot 03. you're right, and this is indeed more about building a single project organized into multiple directories rather than build dependent project. make: Using target specific variables in prerequisites. By specifying dependencies, developers can ensure that changes to one part of the codebase are reflected in other parts, preventing errors and inconsistencies in the final build. am file. echo b > b. Commented Oct 12, 2012 at 6:37. o which check for its dependency main. d #We don't need to clean up when we're making these targets NODEPS:=clean tags svn #Find all the C++ files in the src/ directory Defining Dependencies in Makefile - It is very common that a final binary will be dependent on various source code and source header files. c, monter_main. 0 How to create a Makefile for java with multiple files directories. For example, the directory may contain files a. Makefile as a dependency for a make target. Currently, I've changed my C code though, so that I have multiple different top level . For example, makefiles often have a variable, such as objects, containing a list of all the Makefile: header dependency and multiple inclusion. In this case if you delete b the make will regenerate it (because the default An extra rule with just prerequisites can be used to give a few extra prerequisites to many files at once. By specifying dependencies, developers can Filtering multiple patterns: You can filter multiple patterns at once. That makes it easi I have a makefile in a directory of mine which builds scripts with certain environment variables set. the target a. You can't show the transitive dependencies, only the direct ones, however, you can take the output generated below and feed it into the programs dot (part of graphviz) to make sense of the these transitive relationships. Using the wildcard function doesn't change this fundamental role: There are Make variables for that. Makefile with multiple targets and automatic dependency generation using g++ -MMD. You have to realize that make works in two very discrete steps: first, all the makefiles are parsed and an internal representation of all the targets and prerequisites are constructed into a You can assign additional dependencies separately. 1. For a simple helloworld program below Makefile. Makefile: Ensuring ordering of optional dependencies. h but I want to add foo. This way %. Makefile target is never satisfied. Also it checks if the build directories exist, and creates them if they do not exist. ,. o : foo. 3. c. sas7bdat files, you can include all their . A way of avoiding that was mentioned somewhere here, and consists of adding file-a. c and compare time-stamp with it. How to build multiple targets from one makefile. I use something like this: # Add . You can pass the environment or set a As far as I can tell, a pattern rule is an implicit rule that is written out in the makefile. c, monter_cdev. However, this works best if a single make process can see the build dependencies and figure out what to parallelize. am works:. I wrote a MakeFile like this. So, on entry, dirn exists, and dirn/file. a: phonytarget @touch $@ phonytarget: @echo what the heck is wrong with you I have multiple files in various folders that I need to copy to one include folder: makefile to take dependency of all file in particular directory. h Makefile. If instead of independent targets you have a recipe that generates multiple files from a single invocation, you can express that relationship by declaring your rule to use grouped targets. GNU Makefile rule generating a few targets from a single source file. h'. How can I do this? Suppose a Makefile like this:. monter. When an explicit rule has multiple targets they can be treated in one of two possible ways: as independent targets or as grouped targets. make sees the 3 dependencies (a,b,c), looks for how to produce them: (the "a b c" rule above), but what happens next? I am very new to make files and am trying to draw a dependency chart for my program and could use some help figuring out the particulars of these dependencies. Then when we ask make to build our program binary, it recursively traverses the dependency graph to figure out which parts Let's assume you have install target, which is a very common in makefiles. , out-of-dateness is transitive) but I see that's not the case: if the rule for date. Makefile get list of targets. In our makefile, we have one recipe that links together all our object and library files to make an executable (an . d suffix). I know a little about Linux but not much and I am a complete makefile newbie. bar. Make does have advantages over "plain scripts" in that you can use make to specify the order in which recipes and external scripts are run by using dependencies. In the SSCCE below it appears that the recipe is executed only once: $ cat Makefile . Let’s start with a simple My makefile looks as follows: you're wanting a suffix-based wildcard rule that you can run on multiple file suffixes. Now I want to be able to selectively make install some of those subprojects but include the dependencies in the installation. ld exe: foo. Installing tortonnel - missing 'boost/shared_ptr. 2. Addendum: By the way, gcc and clang have a -MD option that can generate a dependency file while building the . deb from b/ until z. All files ending in . I want to create a json file inside each directory from all its The general solution is to create a target with name all at begin of Makefile: echo a > a. Makefile with multiple executables and dependencies. Suppose you are writing a pattern rule to compile a ‘. makefile - define dependency using variable with objects when building many executables. cpp file (and in case other subfolders with other sources) I have a problem trying to create a Makefile that compile multiple sorces, generate only a shared library and make an exe with another file wiht the main function. . Specifying Dependencies in a Makefile As you can see main. c file with dependencies. By including header files in a makefile, you can ensure that all necessary dependencies are properly linked together during the compilation process. Dependencies are important because they let the make Known about the source for any target. Makefile, Regex and multiple dependencies. If you do not use . () prevents the script from I can't figure out how target dependencies works, here is what I wrote to execute a target for each file in my directory : FILES= $(wildcard *. All that is managed by the Makefile in the test directory. deb depends from the files-tree in the directory a/, b. . PHONY: all In this case if you delete b the make will regenerate it (because the default target is all and its dependencies are a and b). h wasn't updated (i. The main executable should be linked to the module's object files in the correct order (an object file should not precede its dependency) followed by its object file, main. o has 3 dependencies and both the funk files have 2 dependencies. c, src2. Make has to build the pseudo target all to do that it finds a rule for each dependency, each of which link ProgramN. So if I only had one header file and one cpp I would write: Makefile individual header dependencies. Low coupling (dependencies on other components) and high cohesion (purpose) are the order of the day. The Makefile below has to create (multiple) output directories, and generate output in those directories, from input in the directory above. creating a makefile for multiple targets. The manner in which they are treated is By modularizing your build process, defining clear dependencies, and using include directives, you can effectively manage multiple Makefiles in your project. Stack Overflow. Make file with multiple potential dependencies. I'm new to Makefiles and I'm trying to debug something that extends over multiple Makefiles. The second pattern rule matches the target, but the prerequisite (a. Makefile same target but different How to write Makefile to include multi directories. exe to be rebuilt. h To not have to deal with dependency order, replace $< in the rule with $(filter %. cpp) does not exist and cannot be built, so Make uses the first rule. hpp However in the interest of trying to better understand make and avoid the foreach is it possible to define multiple rules that match the Dockerfile make: Circular 6/Dockerfile <- 6/Dockerfile dependency dropped. EDIT: Your "update 2" is a decent solution, but I would suggest you add the line. This is the file as now: # This Makefile will build There are many "Makefile" examples for multiple executables. Here are the files: main. The rule can either call make in that directory (recursive make), or explicitly encode the rules for building the libs in your makefile. out are treated as intermediate files, and they by default get deleted as unnecessary as soon as file-c. But i don't how to create make file for which the c files are linking I only have one single top level makefile that handles every module in the src/ directory and creates the objects and dependency files in the obj/ directory. Using g++ with -MMD in makefile to automatically generate dependencies. I think you got that wrong: Recursive Make Considered Harmful explains that you should not call one make from within another, because neither will have the full overview of dependencies. Makefile process several files. o (by default with a . How could I design a Makefile such that it could contain the entire multi-architecture dependency graph in one non-recursive invocation of Make? Unfortunately, there is no general way to get all the library dependencies of a Makefile (short of grepping for "lib", ". Here's a version that uses the advanced auto-dependency rules, and allows for multiple targets to be built. Generating dependency files in separate folder. PHONY, and a file named install exists in the same directory as the Makefile, then make install will do nothing. c files and having its dependencies . c to %. c) according to another code file (say origin. PHONY: clean clean: rm -rf build You can say a: b in one place and a: c in another and then the dependencies for a will be b and c. dat Put that into a foo. cpp $(LINKER_SCRIPT) gcc blah blah blah If you now run. h with multiple functions that are implemented in separate . To automatically determine the number of jobs to spawn, But if I add a phony target as dependency it keeps executing the dependency rule and the rule of generating the existing file. You can also use the Makefile as a clean way to store and call multiple recipes/scripts from a single file. o files built using this implicit rule also depend on an additional header, foo. I know this makefile is very trivial, but i have been reading some tutorials and examples trying to learn it and apply. o: prefix-%. PHONY: all $(TARGETS) clean dep all: $(TARGETS) $(TARGETS): dep @echo Making $@ @sleep 1 $(MAKE) -C folder s So if you have multiple things you want to do in the submake you should collect them all in one invocation of the sub-make and let the sub-make's This question, and the corresponding answers, describe how to break up dependencies into multiple lines. PHONY: phonytarget all clean all: $(CURDIR)/a. Target 2 is simply . Since the file is already there, and its I'm currently changing a project Makefile in order to build an executable that is exactly the same but passing a different flag to the compiler. h as a dependency of all. Else A must depend on B (which has a recipe and extra dependencies). This is what I'm using to build one shared library: CC = gcc # C compiler PWD := $(shell pwd) CFLAGS = -fPIC -Wall -Wextra -O2 -g # C flags LDFLAGS = -shared # linking flags RM = rm -f # rm command CFLAGS += $(DFLAGS) TARGET_LIB := lib1. NOTPARALLEL: # Force disabling of -j flag all: I have one header file Header1. Subtle point #2: In the makefile it probably doesn't matter, but the distinction between wrapping with {} and makes a big difference if you sometimes want to copy the script and run it directly from a shell prompt. d file, and include it into the Makefile. h, $(files)) will select all . Viewed 1k times 4 . o files This is a simple Makefile I had written. Then it goes to second target main. PHONY: obj I have been trying all day to get this thing to work. make CppJavaScanner If no target is given, make builds the first file described in the makefile make Options. Makefile for beginners. all: main tests main: $(DEPENDENCY IN SRC and ABC) command tests: ?? make -C tests The next time you run Make, it will use the dependency list it created last time. Just add a line at the end: $(addsuffix . cpp (which is not conventional and is very bad taste), your make rule won't have a dependency from my_strings. make: Circular 7/Dockerfile <- 7 So most posts in the makefile tag use spaces instead of tabs and you need to Makefile targets are not analogous to functions, and expressing a dependency on a target is not analogous to calling a function. Make uses same source file for different object files. h file also i know to create make file for multiple c files. Makefile base target and its dependent. To use this makefile to delete the executable file and all the object files from the directory, type: make clean In the example makefile, the targets include the executable file `edit', and the object files `main. Makefile how to specify the include directory. 1 Compile multiple executables from multiple source directories to single bin directory using makefile. – tripleee. lib1: lib2: proj1: lib1 proj2: lib2 proj3: lib1 lib2 install_%: $* make -C $* install install: $(addprefix I'm trying to parameterize my makefile targets. h runs but doesn't result in date. But, if I have multiple file dependencies how will I handle the multiples files ? Can I use a "for loop" for all the dependencies. cpp This Makefile assumes you have your include files in the source directories. I want to achieve the following with gmake: Have A depend on X. c and . That Makefile would have all the dependency rules in it for the content of that directory. This Makefile works when run as a single job (note that it creates the two required source directories and files in the $(shell)). Dependency rule syntax. The command1 is used to build each target using the dependencies. hpp> int main() { int s; std::cin >> s; return lol(); } types. d can be made using this rule, as long as there is a . Add this line to your makefile. o for compiling C files to object files. Making multiple targets and you want all of them to run? Make an all target. c %. You can do something like this rather than using multiple makefiles for the same purpose. Consider making logical collections of object files into libraries. cpp lib/ include/ src/ as the name says 'main. To get it working on mingw32-make I had to replace the @if [ ! -d $(OUTDIR) ]; then mkdir -p $(notdir $(OUTDIR)); fi calls with ifneq constructs. mkdir -p $(@D) Create the topmost and all intermediate directories for $(@D), which is an automatic make variable that expands to the directory part of the current target. If you change one of the files so that there is actually a new dependency which is not in the list, Make will still rebuild foo. 10 Multiple Targets in a Rule. h dependencies were out of date, the dependents of date. My Makefile is. You cannot do this with multiple targets in an ordinary rule, but you can do it with a static pattern rule. You could try to move the dep dependency to your top Makefile:. Flexible Dependency Management: Multiple makefiles allow developers to manage dependencies more effectively. Match anything pattern rule with dependency. makefile: implicit rules: same target different prerequisites. In fact, each `. cpp is including my_strings. h). Makefile: nested dependency. h; monter_main. Targets and dependencies in Makefiles compilation. legacy_admin. c' and `defs. -- and I can build different versions of each so I might do: The problem is the following. built. Please, could anybody show 3 Enter make. 2 Write generic Makefile rule for subdirectories I'm trying to write a make file for my C++ project. Make goal depend on same prerequisite with different flags. Makefile target with multiple dependencies. how to manage c files dependencies in make. Regularly we discover that some build-once targets are actually being built multiple times, having been somehow swept into the recursive's dependency tree. h. (multiple targets). Makefile: Multiple targets, one dependency. cs does not cause Foo. server: @cd $(SERVERDIR) && $(MAKE) That invokes make in the subdirectory in which I build an executable "server". Makefile - Set multiple variables on a single stage. c’ file into a ‘. ko) unless you've got all code in that one file. h in the code] i did . makefile parse target to define dependencies. Breaking Multi-Target Dependencies. Makefile will compile all cpp sources, and generate dependency files. How can I write a makefile rule with dependencies that depend on parts of I would like to compile multiple . so maintarget all: $ First, you can't do this: %/written_*. Below I assume a Makefile similar to the Makefile in the original question which generates dep files using the compiler and includes them. I have a question regarding Makefile. In our case, when first target “all” start executing it looks for main. In my case the project consists of 6 files: monter_main. 0. tests has its own makefile which it uses to compile the source code into binary. txt. out : %-foo- I could do this with multiple stems if there were such a thing what's another way to do this sort of thing in (gnu) Makefile rule dependencies defined in several lines. If the target is older than any prerequisite from any rule, the recipe is executed. hex file: $(ELF_FILE) : <list of dependencies here> <linker command line> Various files depend on the object files in other directories, so I wanted to be able to make one file from within one directory, and have it make that dependency by calling the makefile associated with that dependency. Remember to regularly review and update your Makefiles to Dependency Rules in Makefile. Breaking multi-target dependencies means separating the dependencies of multiple targets so that each target has its own set of dependencies. Modified 6 years, 7 months ago. o' and `kbd. If I have a Makefile rule like this: a b c: echo "Creating a b c" touch a b c output: a b c cat a b c > output and I run make -j9 output. I have a script that generates 2 code files (For example, src1. Negation : If you want to select all elements that do not match a pattern, you can use filter I can enumerate each member to a makefile variable. cpp, Func2. That is, either (1) use a backslash, (2) specify the target line multiple times with different dependencies in each, or (3) populate a variable containing the dependencies and specify the target line once. I also want to be able to run make in Passing Makefile pattern in multiple targets to dependency Hot Network Questions apply_each_single_output Template Function Implementation for Image in C++ You can set make options that you usually pass to make via its command line invokation in the makefile itself. Multiple source files for one header Makefile. all: please_run_me and_me . cpp, c. o files do not exist, makefile to build multiple programs with main in c # SITE: stackoverflow. Ask Question Asked 10 years, 11 months ago. , it compares the time stamp of a target file with the source file and takes action if the source time And you can't use $@ in rule dependencies either - it's empty. h files and src hold *. hpp' 0. How to have a generic make file with subfolders? 1. Ask Question Asked 6 years, 1 month ago. For example, the following is equivalent to the example above (well, assuming that the Makefile is properly designed so that the order of prerequisites does not matter): I'm working on a project for my exam. Each makefile can specify its own dependencies, making it easier to track and resolve issues related to dependencies. 20. (Edit: I I want to write a single Makefile to compile 3 different C++ files with their own independent targets. h being updated then the app rule doesn't run. 1 Makefile directory rule dependency rebuild. GNU make's documentation provides a good solution. Pick an example Makefile, read the manual for syntax (anyway, it's clear for How can I order make command in the Makefile to execute recursively in all The approach in this answer is totally unusable for managing multiple dependencies. It sounds like you have a recursive Makefile system though, which is considered harmful (warning: that link is a PDF). Modified 13 years, 11 months ago. o: foo. so", and "-l" which may give you spurious results); however, if you are installing an open source project, chances are that it is supported by a package manager on your system. elf file). depend main. dot 02. As a side effect, this step also produces a map-file and an Intel . out You can define dependencies in multiple lines by repeating the target name at the beginning of the line: # Makefile baz: @echo baz bar: @echo bar foo: bar foo: baz foo: @echo foo $ make foo bar baz foo Hence, you can ifdef around one or (in practice, you generally don't code in your Makefile some explicit dependency on the compiler itself; but you should not forget to make clean when the compiler has been upgraded) Unless your main. out is ready. Because the above solution sets up a chain in the DAG, make considers it differently; the files file-a. So the following rule should be added to the makefile: The makefile should simply list all dependencies properly (not too many, not too few: Exactly the existing ones). I In select cases it might be possible to just include the other Makefile, but in those cases they could likely have been written as one in the first place, sofailing that, the best you can do to make the dependency tracking work is to extend the recursive make approach -- your own makefile can't track the dependencies of somelib/libsomelib. GNU Make re-using source file when sees other files with same name. I have the following source structure. 2 GNU Makefile, use a variable containing the dependent directories. d files are generated, I modified the compiler options to ask it to also make the tags target depend on the dependancies of the object file. C++ Makefile Dependencies: What Files Do Object Files Depend On? 3. I simplified my Makefile so you can see my problem: . Make is a much more elegant solution to our building problems. GNU Makefile - Pattern rule with multiple targets with one dependency ignores all targets but the first. Edit: I am trying to write a makefile that does something like the following: %-foo-(k). 1. c files in a flat directory): I want to generate a single dependency file which consists of all the dependencies of source files using gcc -M flags through Makefile. Make multiple targets in 'all' 1. d to Make's recognized suffixes. #include <iostream> #include <cod/types. target: dependencies <tab> command • target: the file you want to build • dependencies: the files on which the target depends • An extra rule with just dependencies can be used to give a few extra dependencies to many files at once. sas7bdat: foo. make, variables depend on target. o . makepp is an alternative that helps you to avoid that pitfall. – user325117. Many people today use CMake and tools such as ninja to manage dependencies and speed up compilation. all: start start: Makefile target with multiple dependencies. ) – Makefile dependency generation not checking headers. mjs: js2/. how do makefile dependencies work? 0. Complexity: Managing multiple makefiles can introduce complexity to the build I have a big . makefile with multiple dependencies for a single file. Some useful options:-n Print the commands that make would issue to rebuild the (this is where I start getting confused): If the dependency is a target in the makefile, but does not exist as a file in the makefile's directory, make simply runs the target. For example, imagine I have an application which builds from several . Absolutely. Viewed 2k times 6 Assume the following files are in the same directory as the makefile: 01. Essentially, I made one Makefile in parentDir that had (among many other things) a generic rule similar to RC's: Makefile target with multiple dependencies. e. main. So there has to be something else in your makefile that determines what the targets are. I have a Makefile with multiple subprojects and set its build dependencies. The module's object file should be linked to their dependency (if any) and their . Diagram shows the process from updating source files to executing commands based on the dependencies and targets defined in the Makefile. How to include multiple header directories in g++ without many -I flags? 0. Here are my Makefiles: Makefile: Multiple targets, one dependency. You really need to add a rule which knows how to make libA and libB, then add the dependency from test onto that rule. They are equivalent. f08 file. If I have a makefile that calls another makefile, how to I get the master makefile to correctly check if the dependencies of the subordinate makefile have changed? For example, if I have the rule. Makefile target with makefile as dependency. g. makefile one compile call for multiple sources with headers excluded. Ask Question Asked 13 years, 11 months ago. cpp to main. a, so you will have to ask the Set it as a dependency, and it will pause all dependencies to the right of it until all the ones to the left are completed. For example, $(filter %. Makefile multiple targets from same source file, @RossRidge and @Beta - I had mistakenly understood that if date. 1 Fortran: makefile with already compiled modules. dot That means we have I disagree with Felix and TimF. MAKEFLAGS += -j2 and you can invoke make without the -j flag, it will still spawn two processes to build targets in parallel, when they aren't dependent on each other. 13. Challenges of Using Multiple Makefiles. Here's an e Skip to main content. So there is no need to worry about including header files. We create a file named Makefile, which contains a set of rules describing build products, their dependencies, and which commands are needed to build them. h The end result is that the dependency information from makedepend is injected into the Makefile as a series of rules. mod New to using autoconf and automake, I am following this to learn them. cpp i. I'm trying to make a makefile with multiple files. make LINKER_SCRIPT=link:0. With dependency rules, make will only take action if a source file has been touched; i. c file with the same directory and stem relative to the current directory or one of the vpaths. Get makefile to build two targets from the same file but with different flags. c @echo Specific Rule Skip to main content. Do this for multiple packages with the same building rule and actions e. Example 1: Simple Hello World Makefile. what is the eval do here? Parses the target: files stuff, I do not remember to be honest. The manner in which they are treated is determined by the separator that appears after the list of targets. Hot Makefile. You can throw multiple . PHONY: a b a: b b b: echo "beta" $ make echo "beta" beta. Makefile dependencies depend on parameters. PHONY meets %. mp4: You can't combine a pattern % with a wildcard *. If X passes, we are done. Two-levelled dependencies in Makefile. Try it, it really works! Because Make doesn't do quoting remotely properly this can also happen if you pass in filenames that contain characters it doesn't like (spaces or :) and then you expand them. WAITs on a line. – Eldar Abusalimov. txt) all: $(FILES) Makefile target with multiple dependencies. Rules with Grouped Targets. I have a makefile where I'm fine with existing %. h files from the files list. I am having a 1. o, it finds that the first pattern rule matches the target, and the prerequisite (a. SUFFIXES += . compile a . cpp contains my functions. Without the recipe, one can populate the list of prerequisites anywhere in the makefile, a target can occur in the left hand side of multiple rule statements. o and programs. This is because Make interprets the rule to mean "execute such-and-such recipe to create the file named install". c files to basically get variant builds. So far Makefile with multiple directories and dependencies. I already made this: The first creates a circular dependency error, and the second one does not. h" dependency for all those programs. I know I can add additional one-off rules to make individual . cc file, but keeps the dependency information in one file instead of scattered all over the place. 2 Store object files in separate directory using make. What you do is put a Makefile in each of your sub directories. Hey, I have a simple "master" Makefile who simply calls other makefiles. It's generally hard to run recursive makes in parallel, because the As you know, a pattern rule like: static/admin_%. The above works for a single file dependency. cpp. Multiple patterns in Makefile. all: main gcc -g -Wall -o main main. Make does not combine the prerequisite lists of different pattern rules. h and main. cpp [includes file2. The makefile in doc is supposed to generate html documentation out of those files: doxygen-stamp: Doxyfile $(DOXYGEN) $< echo "timestamp for Doxyfile" > $@ all-local: doxygen-stamp Everything works fine so far, but if I change any of the headers in include the documentation is still up-to-date - because I did not list them as dependencies. h file, using gnu. txt it must expand the wildcard so that it knows how to construct the internal graph of dependencies. 3. cpp, file2. Hot Network Questions Not a Single Solution! How do I make clues in a story? In Christie's The Adventure of Johnnie Waverly, why does Miss Collins lie? Reordering a string using patterns How However what I'm dealing with is an existing project and its Makefile contains other directives dealing with codes in C++, and I think for now I'd better just modify a few lines instead of port the whole Makefile to autotools, unless I couldn't find a satisfying solution without introducing autotools. d dependency files like this: Defining dependencies in a makefile is essential for managing complex software projects with multiple files and components. Add a Makefile : . PHONY on multiple targets. target2: target1 command 1 Target 1 builds the source code (takes about ~4 hours). c # Makefile target with multiple dependencies. The dependencies are files such as `main. Func1. cpp, b. ``I am pretty new to Makefile and I am trying to build a project. Commented Jan 30, 2017 at 15:58. c 2. xyikrt ibxp qlrkbv mwogfx mdppbrh lsazd hqrgw ahe qgwkmmm pql

Makefile multiple dependencies. Multiple patterns in Makefile.