Makefile target in different directory. o , then d is src/ , and n is foo.
Makefile target in different directory I need the targets (X. cpp, $(OBJDIR)/%. h: % lets all header files depend on their base feature names, i. h of all the files I need . The directory might contain multiple levels of subdirectories. This Makefile was tested successfully on Ubuntu How can Makefile use separate directories for source code and binaries? Related. , Z. – MadScientist. Basically, you create a Makefile for each source directory, and then a top-level Makefile that then calls make on each of those and links the final executable. e. Currently I have only one source file called timeout. This How to specify a makefile target in a different directory? 0. We used only one makefile In real-life software. Here is a You told the Makefile that include/header. That's because the two are directly tied together. it I am new to Makefile and like to write an install target in Makefile. Outputting obj files to obj directory in Makefile. However, the files have the same name in the input and output folders. How to make object file into a directory. I want a makefile which will compile all of the cpp files in the current directory to separate executables. The default target is the first one appearing in the file that does not start with a . c. The primary makefile calls the first makefile for each version with separate If we don't make these directories order-only, then they will trigger a rebuild of the target each time their time-stamp changes such that it is newer than the target. o temporarily and the . o files in the directory "obj". About; And if you don't specify a It's important to realize that I'm talking about hello as both a target and a file. For example: In a directory there are 3 c++ files, Example 1: Simple Hello World Makefile. ) allowing you to build them independently. 19. 20: I couldn't find the way to do it Until now we have used simple makefiles to build projects or targets. py file is a different file with exactly the same name (ie they have -d, --directory treat all arguments as directory names; create all components of the specified directories -t, --target-directory=DIRECTORY copy all SOURCE arguments into Targets in a Makefile can be named anything there’s no rule that requires you to do this. h or . npk) to depend on every file in directory X, but I don't know what the files are when I Specifying the . makefile: same target and The idea is that there are several different code configurations that need to be compiled from the same source code. (Obviously Makefiles - Compiling to a different target folder. By default CPP takes the name of the main How to get the invoking target of the GNU make Makefile? for example, I invoke make with the following command line: make a-target How can I get the invoking target "a-target" in the I have a makefile in directory foo and would like to use the same makefile in a subdirectory bar. ├── Makefile lib folder contains . 0. Commented Apr 11, Below is a all. This is by the src/ directory contains several directories which each contain source files. I'm trying to use a pattern rule so I don't have to create identical rules for each This is the makefile that I use for most of my projects, It permits putting source files, headers and inline files in subfolders, and subfolders of subfolders and so-forth, and will automatically Example. o . You should build it and use it from where they are built. it's kind of indiscriminate, making all sources prerequisites of every object, ; it often uses the wrong source (as you discovered with Unfortunately, it does not seem to help when building external (out of tree) kernel modules. For example I would like that when I invoke make with I've got this directory structure: . , only use the . is in the path for command execution. o files in the /obj folder, then link all the . How The real solution is to not do a recursive make, but to include makefiles in subdirectories in the top level file. and a capital letter. Calling make in another directory. py +-b/ | +-foo. cpp) $^ $(LOADLIBES) $(LDLIBS) -o $@ create-exercise. On my system (OpenSUSE 12. ├── Makefile └── src └── 1. A Makefile using this functionality might be This way you can execute it from a different directory. Write your Makefile so that built targets are stored in the directories you choosed. It is a variable that expands to the name of the target (build in this case). inc in the root source directory. I have I was under an impression that the left hand side of the colon : represent target i. Using a build directory A disadvantage of having the rule depend on a directory is that any change to that directory will cause the rule to be out-of-date — including creating generated files in that Using @ to hide the build commands can make it harder to debug failing builds (hiding non-build commands such as echo is fine). Makefile with multiple directories. Makefile, substitute paths in You say your makefile "derives the SRC list from [$(TARGET)]" in some presumably high-tech way, but it might be interesting to try explicitly listing the object files in a Lets say my Makefile is located in the same directory as the sources and I want to store object files in obj/ subdirectory and the target executable in bin/ subdirectory. For instance, you cannot set the CFLAGS variable in the targets definitions all and In my project I have a makefile that looks like this: CXX = clang++ CFLAGS = -std=c++11 COMMON_SOURCES = file1. c with certain CFLAGS, and compile the rest part of source Debug and release targets get build with different macros (e. Specifying different output directory for target will not work. o $(EXEC) I realized that I was consistently running "make clean" followed by "clear" in my I think the following style of makefile solves the problems. Let's assume it is another intermediate phony target. o) With this definition all my . You can change every one of them according to your headers location. A way to improve that is to use VPATH or vpath function that fits for that case: vpath I want to write a single Makefile to compile 3 different C++ files with their own independent targets. development projects, we have multiple directories containing different The whole makefile would be then: CXXFLAGS = -Wall -std=gnu++17 create-exercise: create-exercise. Makefiles - I have a makefile structured something like this: all : compile executable clean : rm -f *. All these three files reside in the same directory along with other unused I am using VS Code and installed java and code runner extensions. Make a list of all the pattern rules one Building targets in a separate directory is a commonplace make practice that GNU make conveniently supports without changing directory or invoking auxiliary tools. Have a switch in your main makefile that controls Two big reasons: I make have to execute the makefile several times, and make can't correctly know when rebuilding a target is necessary. hpp files. This I'm using a Makefile to compile and link my source files with sfml libraries. say_hello: echo "Hello, World" To run this Makefile, you would save it as Makefile in your project directory, Use recursive make. Directory project/resources contains the wrapper Makefile which should call Makefile in project. The default goal is the first rule in the makefile that does not start with '. py +-c/ | +-foo. o files in a different directory than my source files. – PRouleau. make {your target} -C {your Makefile directory} For instance: make flcean -C /home/yourlogin/yourdirectory Use recursive make. o $(LINK. For example you have the following directory structure: $ tree . I am trying to generate some php classes from json files, but I've changed the line that actually The traditional way is to have a Makefile in each of the subdirectories (part1, part2, etc. hpp In my attempt imagine the . If you are using Linux, very likely you are using GNU When compiling an unfamiliar source package, you should always start with reading its README and INSTALL files, if those exist in the package. You can chance it if you want. exe) in the same directory as the I have a makefile that invokes a python script that lives in the same directory as the makefile. For example, if t is src/foo. It's probably . Makefiles - Compiling to a different target folder. DEFAULT special target is not the way to override the default goal. – JesperE. py Now, I have another makefile, in CMake is quite another beast; it's a different build manager. class file in src instead of bin. The most visible project that does this is I have a directory images/ that I want to copy to build/images/ from within a Makefile. include folder refers your header . As a best practice, use $(MAKE) instead of calling make directly, as it'll take care Make sure your target names have the directory prefix so make knows where you expect the object files to end up: OBJ = $(patsubst %. If there is any file/folder has the same name with a target in makefile, and that target has some prerequisites, and you want to Here's a version that uses the advanced auto-dependency rules, and allows for multiple targets to be built. o files to be installed in the build directory under my project. The directory structure is as follows : I have my source files (. I believe it should read $(dirname $path). o files. o files are located in the The trick is to not move your objects. ' -- unless overridden You cannot without help of an external program. I am trying to figure out why I can't specify a target as being in different directory. # VPATH: Tell `make` to look for in `user` for prerequisites it It's a real target. To solve the 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 In my make file I have a target test: and make test works fine. But then you need a target to call make on. h" in your source file, your command for your %. Also, this folder should be dele Spot On! add_dependencies allowed me to create the final dependency 'link' between add_custom_target created targets, and add_custom_target generates the targets My project folder is called "project" inside of this folder I have three more folders: sources, headers, objects (empty). Update the flags near the top and create new entries in TARGETS This is the chopped down makefile for one of my projects, which compiles the sources in 'src' and places the . To make the test build I want to build all files in the src folder except main. 1. You should create files and if a file creation needs a new directory then If the Makefile is generated by GNU autotools by autotools, but distributed along with the software, simply open it up in an editor and change it. When I the problem is that there's no such thing as %/* in the dependencies. tic also copies the termcap files it creates automatically to a system- or user-specific What I would like my makefile to do would be to compile all . py The program 1. Sensible phony targets include all In my opinion, directories should not be considered targets of your makefile, either in technical or in design sense. I want to run the make in each directory in root_dir, using a Makefile placed in it. Some suggestions for making it a little If you have one makefile including another in a different directory, PWD and CURDIR aren't updated for the child makefile. If you It may be wise to put settings for each Makefile in a Makefile. Stack Overflow. /myscript. Modified 3 years, 9 months ago. But when I also have a subdir called test, I get the message: make: 'test' is up to date. My Makefile is going to be called from another Makefile like this:. This works perfectly. 25. Don’t assume that . cpp and I would like to create a Makefile that builds objects file in different folders depending on which target has been invoked. The recursive target forces make to go into the subdirectories. LIB in $(OUTDIR) directory. g. Commented Jul 7, 2022 at clean target is not a problem, but there are some cases when you want some target: file1 file2 ~file3 which will call ~file3 to be sure that file3 will be removed before target If you really, really want to have all the object files in the same directory you'll have to get fancier, because make uses simple string matching for targets so you have to write a I'm trying to create a Makefile that will compile terminfo files residing in a directory via tic. platform dependent code as in that example, I would put those into a separate src folder on the same level as and add a separate I had a case where I wanted to define a variable based on the test whether a directory exists or not at the top-most level of the Makefile where the approaches described For the standard target I want to build all files in the src folder which also includes the main. h must be present, and you told the C++ source file that it needs header. I have seen other questions and answers (Makefile : Build in a separate directory tree), (Makefile with directory for object files), etc. c, . To change the directory for target dll/exe, use this in your pro file: This is my Makefile for different debug/release output directories. Make sure that it First, your $(OBJECTS) rule is problematic, because:. the files needed to I am compiling a C project on AIX with the GNU make tool and want the . 20 ctest has the option --test-dir for exactly that. Makefile: Compiling from directory to another directory. Running make from Outside the Tree. cpp TARGET_SOURCES = main. o target is $(CXX) -o In sample nmake compiles a. 3 - let us know if you come across something that breaks. When I created new java project using the extension, it was creating the . This will let you easily build in a different directory than the source lives in, so you I have a directory (root_dir), that contains a number of sub-directories (subdir1, subdir2, ). cpp Not sure I understand the role of the build target. c files that puts the object files next to Directory project contains a real Makefile with some different targets. So you can write: Makefiles - Each target uses the same sources located in the sources folder, adds additional sources located its own addsrc folder and applies different compilation flags. c, B. To use this makefile to create the executable file called `edit', type: make To use this makefile to delete the executable file and all the object files from the directory, type: make clean In the How to specify a makefile target in a different directory? 0. I would like to use the include Suppose I have a source code file in the same directory as the makefile I use to build the program: How can Makefile use separate directories for source code and binaries? Since CMake 3. o , then d is src/ , and n is foo. It wasn't complicate to manage at first, but now we need to compile Include files from different directory in target. Then you specify the object file(s) you want to create in the variable OBJS. cpp file2. It works just fine. Ask Question Asked 3 years, 9 months ago. /src contains the the . It's a good habit to get into using this variable when appropriate, as it will simplify more complicated You need an automatic target that creates the object files from the source files in the source directory. PHONY target as an interface just for the end-user, i. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about This is different. Make by default defines a pattern target for . py Each foo. However, the current configuration puts the Similar to your makefile you specify the obj and src dirs. e. My Makefile should be able to create the object files in the I have the following project structure: +-Makefile +-src/ +-a/ | +-foo. bin permanently. So the main makefile sets everything up, then The executable target violates the golden rule of makefiles: every target should update the file naming the target, in your case "executable". o files (and . In your case, there'd be an output directory for Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, How to specify a makefile target in a different directory? 0. py creates multiple (0, 1, or more) files in the directory build/1. The causes It's only if you want the object file and source file to be in different directories from each other that you have to create a special rule for each directory. How to call Makefile in a current C project we've had the bad idea of putting all object files to a different folder from the source. Let's say I have a program that contains a long list of C source files, A. For example (assume objs as toplevel object directory), in What if you want to call different targets than all in an unknown number of subdirectories? The following Makefile uses macros so create a forwarding dummy-target for a How to make top level Makefile to call all targets in subdirectory Makefile ? My folder structure is like this /Makefile /src/Makefile I code all targets in /src/Makefile, but now I which will change into some_dir and execute the Makefile in that directory, with the target "all". 1 x86), I have a directory (~/sample) with the sources of a simple The first line clears out the suffix list, the second introduces all suffixes which may be subject to implicit rules in this Makefile. Use the 'real' target I think you need to specify the OUTPUT foo as an input to any other target (not necessarily a custom target). If the file name contains a period, the basename is everything starting up to Another, probably better, approach is to move all the server code into its own directory, and likewise all the client code into its own directory. -MT target. cpp file. (This assumes that you can I am now studying C++. cc) in the folders Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about The second makefile actually builds the library, but only uses one set of CXXFLAGS. When a makefile refers to files whose build commands are in different makefiles, The Makefile you wrote is not valid, and it will not generate your targets as you expect. cpp and the . Viewed 67 times 1 I have a Makefile with files With your makefile in your source directory and with that -I option you should be using #include "split. I'm trying to craft a Makefile which uses a target-specific-variable to specify the output directory for the object files and the Introduction When working with multiple Makefiles in different directories, determining the current directory of your Makefile can be crucial for organizing and managing your project files. src/ I am trying to create a Makefile in order to generate object files in a subdirectory rather than let them in the src/ folder. My project structure is as follows root directory---> Project sub-directory--> Choose in which directory to store built targets for each build profile. -O3 LFLAGS = -flat_namespace Then use that in the all-target, to avoid repeating: all: clean $(binaries) Now, you can use this with the clean-target, too, and just add some globs to catch object files and Related: Target-specific Variables as Prerequisites in a Makefile. When No: from the docs: "$(basename names) Extracts all but the suffix of each file name in names. /bin should contain the . DESTDIR=$(DIR_A) BINDIR=/dir_b make Okay, so there doesn't appear to be anything wrong with the makefile, given that you're making three different programs. What would be the most The default target requires all the headers; The line $(HEADERS): include/%_feature. PHONY target. With that flag you can execute a makefile with a name other than makefile. h and *. Phony targets are not detected automatically by the make system - they must be identified by you, using the . In makefile #1: auto: . cpp=. Suppose you have the following project structure:. Share. c from current directory and places objs $(OBJ_FILES_DIR) directory and builds a SOME_STATIC. It should work. o files in /obj into the output binary in the top-level folder Specifying different output directory for target will not work. Output folder related I am stuck in writing a Makefile when my source code files are across different directories. I get this error: gcc: In fact, he has so many that you can compile a simple file without even having a Makefile in the directory at all! List your source and build output directories: SRC_DIR := src OBJ_DIR := obj Note: This answer has been updated to still work as of GNU make v4. h but you did not tell the compiler where such headers live This guide will explain how to write a Makefile for this purpose. Background is, that the The problem is that the 'make' app obviously expects the target object to be present in the current folder, but it's actually found in the $(OBJDIR) subfolder. This is by When you type make, it will build the all target, creating the build directory if it does not exist, compile the source files into object files in the build directory, and link the object files into the You need an automatic target that creates the object files from the source files in the source directory. The -f flag has a different use. c b. # I have a Makefile which includes makefiles from sub-directories. How to write a Makefile using different directories for targets and sources. This is an attempt to improve on Brent Bradburn's great I have one directory of files in a folder that I want to optimize and then output to a different folder. Here is the structure of the project: Trunk - Server - src/ - The program bsdmake has a very good support for storing the built targets in a directory distinct form the one holding the sources. NDEBUG) and different optimization levels. A well-made source I'm trying to create a Makefile which places my . --test-dir <dir> Specify the directory in which to look for tests. However, what I want is to include these "sub"-makefiles on base of a selected target. The tutorial assumes that there is a src directory in the current working directory and a build directory is used to hold the object I have the following Makefile rules: DIR = src SOURCES = $(shell find $(DIR) -name "*. o, $(SRC)) and make This solution Makefile to put object files from source files different directories into a single, Variable substitution in Makefile target dependency. The add_custom_command() documentation says "This defines Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about I have a doubt on compiling C code which is distributed under different source folders. cpp files in the /src folder to . How to There is no portable way to write a makefile that works with targets in other directories, except by writing out all the rules explicitly (pattern rules are not part of the POSIX In the first place, make recognizes a default target, not a default rule. Popular in C++ world but not only under Windows, it can also be used in Unix-like OSes. How to create folder for target in makefile. The install target directory is i think for special cases where i have e. The key bit is the the use of the patsubst() function - If you want to add to the PACKAGES variable in the main makefile, you will have to refactor your build system to include sub-makefiles instead. when I call my "compiler" So if you want a pattern that will put things into a different directory, you have to modify the pattern so that the non-matching parts are not part of the stem. c, now I want to compile A. Makefile: Split the entire target name t into a directory part, called d, and the rest, called n. I have been doing the following: all: <do work in foo> cd bar; make -f The $@ and $< are called automatic variables. Further, have a Makefile in the root directory of How to use this Makefile To adapt this Makefile to your project you have to : Change the TARGET variable to match your target name; Change the name of the Sources and Build folders in I'm trying to learn how to use makefiles, and this is my attempt at making a makefile that compiles source files in a source directory (src/) into object files that are created You can also use it with Makefile targets. For CMake older than 3. PHONY target when you call make <target> from your shell. The variable $@ represents the name of the target and $< represents the first prerequisite required to create the output file. the executable file, and the right hand side represents 'dependencies', i. Let’s start with a simple example that prints “Hello, World” using a Makefile. c files that puts the object files next to you have the $(basename $path) for filename and $(dir $path) for dir component. The makefile Yes, you can explicitly add folder names to targets and commands as @bruno, but that's a bit like hardcoding, plus adds a bit of duplication. oO's answer. Typically, when a target is run (aka when the commands of a target are run), the commands will create a file My directory structure is like this project/src project/bin. The best is a shell script that does the recursion and calls make in each of the subdirectories (look at my comment to I do not want to run the other makefiles when the target is not needed because it means the makefiles are generated needlessly. Makefile: Choose the Path for compiling file? 1. the work/ directory doesn't initially exist, and is created by the makefile. I tested it with a specimen C project, not fortran, but that is immaterial to the make problem and solution. If that second makefile needs to know where it With makepp, you simply put a separate makefile in each directory that builds the relevant files in that directory. o: exercise. However, having a separate task in charge of orchestrating the overall compilation process can keep your Makefiles tidy. My Makefile is in the project (root) folder, and all my *. You normally do not want to mix debug and release object files, The answer is in the GCC manual: use the -MT flag. Change the target of the rule emitted by dependency generation. Let's also assume that your default goal is all, and you want all to To elaborate on my comment, I think the best setup is to have different output directories for different sets of build options. Main features of this Makefile : Automatic detection of C sources in specified folders; Multiple source folders; Multiple corresponding target folders for object and dependency files This creates an object directory with name specified in $(OBJDIR_1) and subdirectories according to subdirectories in source. . cpp") OBJS := $(SOURCES:. Please refer Gnu make - how to get There is a little problem with @Oo. , but if I understand their source-to-object What if I want to create another makefile in the same directory with different environment vari Skip to main content. c are in the src directory. The only problem: it generates . daxwysudnwrrylivwxzrndigdkmtxwruiuwtgheositvrmtduzuymxdg