Makefile link all libraries in a directory. cpp files in the /src folder to .
Makefile link all libraries in a directory Hot Network Questions Changes to make to improve feet/pedal playing Adding a dimmer switch for a light in the same box as an outlet wired with line and load power I have a project in C, and due to the nature of the application I'm making I've decided to statically link libconfig into my final binary to minimize the external dependencies needed to use it. a rule, it would be referenced as $@, which would be passed to $(AR) as the first non-option argument. if a file changed in images/ it should be automatically updated in The message about missing libraries comes from check fired from include/package-ipkg. For instance, if you want to link to the library ~/libs/libabc. AUX_SOURCE_DIRECTORY(dir VARIABLE) Collects the names of all the source files in the specified directory and stores the list in the variable provided. Here is the basic folder . a in the current folder and using an include with "" to prefer current folder for library location. cpp and examp3. cpp. a import library # # On cygwin i. What is the rule that needs myfile. cpp and . h and a static library libmylib. so shared library # # On windows (msvc) # libxxx. Because, after build the exe, you should told exe where the shared library directory is. o In any case, that pro file is quite complicated and would be rough to completely replicate for someone just starting out with makefiles. h Game. The -lname option specifies a library which is with libmine. /Library1) to the second For a program I was linking the static glibc library (which I modified). SRCS are all the C files located in the SRC dir, BINS contains all these filenames without the . or you made a typo and wrote BLIBS instead of LIBS, LIBS = -L/usr/local/lib -llapack -lblas Aside from the fact, that I wouldn't create a library in the first CMake-Project and link it manually in the second. It is not that difficult to only run make on the directories that contain Makefile, nor is it difficult to restrict the number of levels to recurse. a are written out, as opposed to -lXYZ which would auto-expand to libXYZ. Load 7 more related questions Show fewer related questions Sorted by: Reset to default Know These may be in a system directory or a user-specific directory. cpp files, so my directory would look like this: main. 0 Use shared library linked with a makefile. Follow In your makefile, The sections that compile and link never add the $(BLIBS) which contains the BLAS and LAPACK libraries into the linking process. However, the . so library. I know I can do this. You can include these directories via the context menu, which includes all source files inside them, recursively :) 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 generate a dependency file for each object This means that modification of headers and inline files will trigger recompilation of files which are dependent. c file into the library folder specified in the Makefile, but it is not finding it. How should I modify the makefile if I want to compile (maybe even link) using just one call to GCC? For reference - my makefile looks like this: To get a list of all directories in the same folder as my Makefile I use: DIRECTORIES = $(wildcard */) all: echo $(DIRECTORIES) which works fine, and gives me the desired list. 6. a static library file, both of them are in directory in say, /home/data/folder1. This check is verifying all executable files have all needed libraries available in the system. fip clean Edit: If there is a way to put all object files in Server/obj/, that would be ok too. CXX = g++ CXXFILES = main. It will automatically build the all target, which will build your program into an executable called nomProgramme. Also CPPFLAGS are for C preprocessor flags (-I / -D); compiler flags like -Wall -pg -O2 belong in CXXFLAGS (for C++). To change its location, we would rename the target. Until recently, all the sources were in a single directory, and the Makefile did something like this. What you may be missing is telling the g++ where to locate additional files that those cpp files #include. Improve this answer. The above answers work well when all of the subdirectories have Makefiles. /mylib/mylib. c files, in your makefile, just like you are listing the . dll) from all the . so (shared on most variants of Unix, but Mac OS X uses . In this article, we will delve into how you can link external libraries in a makefile and test the linked libraries to ensure that they are functioning Here is a rudimentary, unrealistic makefile that will make the static library libmyLibary before it makes the program main, which it will link with the static library using the -L (library search-path) and -l (library) options. I'm trying to use cmake (on Linux with GNU make and g++) to build a project with two sub-directories: MyLib and MyApp. /c_app. cpp files inside. You don't link . jho317. 4. The installed version of OpenSSL on my ubuntu bionic machine is however OpenSSL-1. a in the list of libraries (subracting 'lib' and '. You will need to add -I<path to header directory> to this macro for the compiler to find the RtMidi header files. SOURCES = $(wildcard *. You appear to be stating is that some of your . h . I am trying to compile a . link_test: link_test. cpp, examp2. c files in the directory with the makefile. cpp Game. By default, executable file only search shared library at /usr/lib or /usr/local/lib. cl /help doesn't show the complete picture as well. c files, you link . DIRECTORIES = $(wildcard . You can set these when you run make: LIBS= How can I link this in makefile. /lib, you would want the -l options and -L. Provide details and share your research! But avoid . Propably this will help you: How do I tell CMake to link in a static library in the source directory? But you should look (if possible) for a way to create a single CMake-Project with sub-projects. a main main: main. The target-specific command can also control how the search directories propagate to Use -lm only when linking. a $(CC) -o main main. My program need to link to 1. You can change or remove it -L is the path to the directories containing the libraries. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I have precompiled fftw3 libraries in an external_libs directory that I'm trying to link to with a custom Makefile, Makefile, linking a library. My makefile looks like this: CC=gcc CFLAGS=-Wall -lm all:client . \Objects\myfile. I need to create links for multiple directories in a Makefile. The typical UNIX linker works from left to right, so put all your dependent libraries on the left, and the ones that satisfy those dependencies on the right of the link line. However, If I try to link it to an library (as LibCurl to use SSL connetion): all: g++ test. a gcc -o myProgram libmylib. h. h header file and you're in trouble. Follow answered May 14, 2012 at 16:01. MyLib contains source for a static library; MyApp needs to link against that library. Please guide how to fix it. ARG=$(QUERY_STRING) MAIN=main SRC_DIR=$(DIR)/src BIN_DIR=$(DIR)/bin INC_DIR=$(DIR)/inc LIB_DIR=$(DIR)/lib LIBS=markdown all: $(MAIN) exec $(MAIN This manual page for rintf() indicates that it is declared in <math. obj as the dependency. For example -l:libXYZ. /lib and put the libParser. Asking for help, clarification, or responding to other answers. -lmyLibrary libmyLibrary. Viewed 721 times you put a '/' in front of the directory name , so its looking for libfolder in your root directory. a is not in the usual directory, change the library path to look in your directory first. You need to add the relevant -l flag to AM_LDFLAGS in Makefile. You can change the dependency on $(JNI_DIR) to be an order-only prerequisite I would not want to write list of all libraries with cl command on one line. Here's my current makefile that makes the . 8 and 1. c -L. Notice the lib and . You can see my files distribution in the output of tree command that I have added to the post: I want my header files in the includes folder, some library files in srclib, my main source files in src and the generated . This is a complete, standalone, fully worked example of how to compile a library and program in separate directories of the same source The result is that if you link a static library too early, then the functions in that library are no longer available to static libraries later on the link line. You also need to be in the same directory as Makefile when you run make. c files in the project folder and make the object file of every . However, as headers/source change frequently, I'm hoping to create a makefile that would automatically generate all the . I want to link all libraries (. Try either removing the '/' or putting a period '. sdv. o and libshape. # Shared libraries to link in all cases SHLIBS= # Shared libraries to link in debug, optimitzed, and profiling cases DEBUG_SHLIBS= OPT_SHLIBS= PROF_SHLIBS= It makes all sub-directories of a project visible, greyed out if they don't contain any files logically included in the project. obj:: $(CC) /nologo $(CFLAGS) /c /Fotmp\src\mystuff\ $< which will find and compile all the . I have a module called rio which consists of rio. I'm compiling a project and I want to link it to the opencv in a given directory, not the system directory like /usr/local/lib/libopencv In the end is the default makefile, which links to the system I have created a . Before, I've only ever dynamically linked libraries by doing the standard method of just using flags pointing to /usr/lib and /usr/include, leaving my personal project directory This makefile and all three source files Lock. I have a directory images/ that I want to copy to build/images/ from within a Makefile. g. nix or have a Makefile that contains: win: make -f makefile. /a_app. You will need to use a makefile to include all the directories that are required to build your binary. a you'd add:-L$(HOME)/libs -labc To take advantage of the default implicit rule for linking, add these flags to the variable LDFLAGS, as in boost::thread is one of the (few) boost libraries which are not header-only and requires -L/-l rules to the linker. Mainly, the root/ directory has sub-directories A/, B/ and C/, all of which have . /libs/' main: That seems to be the only way I can make a dynamically linked program work from several directories (as in bin/prog vs. No matter, you have to explicitly list those . c suffix) that you link to your main source code. /topdir/) should go from . e. One of the source file Trace. o files:/build/ for . o bar. so" # make clean -> remove the library file and all object files c \ cc/c1. Here's the complete Makefile (minus some source files and linked libraries): Edit2: Updated with Didier Trosset's changes You are going to wrong direction, you should link with shared libraries (libav). I want to recursively find all the files in a root_folder and store it to a variable. a library file. cpp folder/*. a'):-lParser -lrt -laio What I want is a rule in my makefile that will find all of the . And here is a snippet from the manual on how you should do that with your own libraries: my_inc = include_directories() my_lib = static_library() my_dep = declare_dependency(link_with : my_lib, include_directories : my_inc) I am new to makefiles. Link the dependencies: Link the dependencies in the same way as the main library, using CMake or Makefiles. cpp The syntax of CMake files is quite simple (certainly simpler than Makefile) and it will generate Makefile or Visual Studio projects on request. In the above Makefile, the archive name is fixed as the libclass. Ask Question Asked 3 years, 10 months ago. To compile source file, you need to include headers. so as part of some install script you have to write. /topdir/<file>. lib static library # xxx. This is both the case for the -Wl,-rpath= method and for the LD_LIBRARY_PATH= mehtod. This is done so that when one C file is changed, recompiling all of the others isn't necessary, it can just use the cached object files. %. Here is the Makefile code: Suppose you wanted to add a -g3 or -Os flag or compile for a certain c version or link some library, I am using this Makefile which compiles each . I want a makefile which will compile all of the cpp files in the current directory to separate executables. o (plus all the other directories) to your LIB and . 2. /libs/ helpers. Linking with libraries outside of $G: Add directories to search for additional libraries to the "LIB_DIRS" line in the Makefile. a. like if I want to link then /link and where does /LIBPATH comes from? – What I would like my makefile to do would be to compile all . so and . a to link with libXYZ. c and demo2. exe. I have C codes. PHONY: clean clean: rm *~ *. That is correct. o their path in system -> home/pi/openvg You also usually want all the libraries after all the object files on the linker command line. And the last command is the link of all object files. I could have more than 50 include file and many libraries. o $(CC) -o $@ `pkg-config --libs openssl` $^ Also see How to use pkg-config in Make and How to use pkg-config to link a library statically. c $(CC) -o $@ -c `pkg-config --cflags openssl` $^ target: foo. a library into my Makefile? For example, if I have . The individual targets work fine, but could not run all the target at the same time using "make all". However, if you want to do it it's not hard. Try this one: LIBRARIES= -llib1 -llib2 test-app:$(OBJS) $(CXX) -o $@ -L$(LIBPATH) $(LIBRARIES) $(OBJS) Consider that the arguments order are most of times important since the gcc compiler/linker process the files just one time in the given order and if the order was wrong errors like "Symbol not find" and "undefined reference" will be produced. In my . Without the directory prefix all it takes is two different libraries with a socket. foobar/types. gcc userfile. The problem is that the libraries must come last (and the order in which libraries are listed can also be important). /somedir and you type somedir/out, the file . exe I have a C++ library built using a Makefile. cpp file I have a function call that calls a function defined in SOIL. Suppose I have main. Do you know how to do it manually on the command line? If so then it's the same command option in the Makefile. dll DLL # xxx. a (static) or libmine. Let's start by looking at a sample makefile: ##### # # Sample Makefile for C++ applications # Works for single and multiple file programs. Any suggestions? I am now studying C++. What would be the most elegant way to do that? I want: avoid a full directory copy on each make run (i. -fPic is only necessary when linking dynamic library. I have makefile and I need to link two objects into "main" object They are -> oglinet. I'm trying to link the jemalloc library into my application at build time using it as a pkg_check_modules (JEMALLOC jemalloc) pkg_search_module(JEMALLOC REQUIRED jemalloc) include_directories(${JEMALLOC_INCLUDE_DIRS}) target_link_libraries(your_target_name How to explicitly link library path via makefile. a, I presume you want to link that library into an executable. o | libmyLibrary. PHONY: all clean all: libmyLibrary. I have no idea how to do this for all . Now I want to link them to my binary in the General directory like this: add_executable(main ${main_SRCS}) target_link_libraries (main sfml‑system sfml‑window sfml‑network sfml‑graphics sfml‑audio sfml‑main # Other stuff here ) But I get: What's happening is that when the symlinks are created by the first make dirs invocation, the modification time of the directory gets updated. With make install I place the library in in the correct directory and with make all I finally compile my program that use4s this library which is all fine. . The directory might contain multiple levels of subdirectories. cpp)) I have a header file myheader. 2) If you're using static linking, all you have to do is tell the linker where your library is at compile/link time. My question is how to write a makefile with more manageable ways. fip make -f Makefile. I am sure I am missing something. <target-os>cygwin # libxxx. It is the latest stage of package creation. / I am writing a new Makefile and would like to copy my object files in obj/ folder. c # The OpenSSL package configuration library name is openssl. Substitute . Where the -l: notation (note the colon) will link to a literal name - so then you can put your libs back To do so I have to pass all C-files at once to the compiler frontend. a target name. am; e. LDFLAGS is a variables used in Makefiles to indicate the list of flags passed to the linker. To link an external library with Makefiles, follow these steps: Find the library files: Locate the library files on your system. You can compile these with implicit rules of make, no need to All I'm trying to do is put all my libraries in an include folder and lib folder. cpp -o Test -lcurl It goes wrong (I already installed You can have multiple -I switches for multiple directories (as you have here) and the same for -L. c and rio. But the rule is the same as for headers: The -L path(s) must point to the directory containing the libraries, not any parent of that directory. cpp) $(wildcard subdir/*. And I dont want have a Makefile in every subdirectories or something else. /lib. To link against a library libabc. How do i include wildcard which illustrates all the files will be executed. /anotherdir/<file> to . echo LDLIBS = -lcs50 > Makefile or tell make to link with certain libraries by specifying the required libraries in LDLIBS in the environment. You have to compile the . a file) that i can link fine with a main program using the following command line on Linux by placing the . The only problem: it generates . I have in my directory src/include/apr src/libs. c extension. c files in my src directory and compile them to a flat directory of objects in the build directory. I have compiled the libraries and placed them in my libs and I have put the headers in the include directory. Here's what I've found: # The following naming scheme is used for libraries. a or -l:libglfw3. This command is intended to be used by projects that use explicit template instantiation. c Each app depends on helpers lib and GStreamer, so I need to compile helpers. If it is literally saying don't know how to make myfile. win and makefile. c (transitively). In addition, if you want to dynamically link libraries, you need to tell the linker where they are. Problem with hand-coded Makefile is that very soon, your dependency tree grows so big that maintaining all the rules of what needs to build what becomes a very tedious operation. so is searched, not the file . asked make does not accept options like -L /path/to/somewhere - these are arguments that need to be given to the compiler and make will not pass them on. You will need to do that next, this is done in a similar way to telling the linker what files to link, but with some extra syntax. I tried to add OBJ directory folder but it is not picking up. o SOURCE=client. exe file called main. c files are in a different directory. I paste one of my makefile. /somedir/libname. h header file and the . You can chance it if you want. As told from Maxim Egorushkin, LD_LIBRARY_PATH is a bad choice. c # compilation options CFLAGS = -O2 -g -W -Wall -Wno-unused-parameter -Wbad-function-cast -fPIC # linking options LDFLAGS = -shared -Wl,-soname,$ (SONAME The library names are specified with the following Makefile variables. cc) $(program_OBJS) stack. I have another . /b_app. a static I'm trying to build multiple shared libraries in one makefile. This is done for libraries that are provided by If a library search path must be provided, prefer to localize the effect where possible by using the target_link_directories() command rather than link_directories(). The makefile currently looks something like this. Note that the first character on the second line should be a tab, not spaces. Build the application and link the shared library with a Makefile. Inside the directory of the example, there is a Makefile that I have been using to compile and run the example. /libsvm/libsvm. Follow edited Jun 16 at 8:01. a or libabc. You will need to compile all the files in in the Stanford directories and add . cpp files in the /src folder to . fip install 3) Clean all files produced during the build process make -f Makefile. so SRCS := lib1. Share. cpp, Trace. It presented three different use cases: Calling GCC directly to build the application and link the shared library. I do have the appropriate compiler for it though. You do not need to use -lutility and -lfunctions because they are static libraries. You have managed to compile and include the header file for the library, but you did not yet tell the compiler where the code (definitions) are - i. a: myLibrary. They are not used when compiling source code, but only when linking. /SOIL/lib -lSOIL) and -lGL -lGLU -lglut -lGLEW are dynamic libraries. c on a remote Solaris 9 server that holds two versions of openssl library (0. Here's my Makefile: DIR=. win make -f makefile. c helpers. h Makefile All the methods where in the their header files. a files in my command : you can move the library in a directory that is in the loaders search path. 1. You should also just run make without any specified targets. I've set include and link directories with . Load 7 more related questions Show fewer related questions Sorted by: Reset to default Know someone who can Here is my directory structure : This is the exact reason there are two different "standard" make variables for linking libraries: LDFLAGS which are supposed to contain the flags Confusion with Makefile linking a library that seems to link but I can't call. Makefile. c file. -o myProgram main. Viewed 224 times 1 I Makefile, linking a library. h or . 0. To specify the location of the libraries, you need to use the -L flag. 0 Makefile link shared (dynamic) libraries. Improve this question. c file is in directory /home/data/folder2. obj, and not don't know how to make . I tried: @for f in $^; do \ echo "this To ensure a common Makefile template for all your libraries, it is essential to maintain consistency in the folder hierarchy across different libraries. how to create and use a self-defined shared library with gcc? 0. The logic is that the . mk. The Makefile serves as the entry point for building each library, the Outputs directory holds the generated object files and the You have to put the makefile in the root directory of the chapter (chapter-1/ in this case). cpp you are telling g++ to compile cpp files in folder. c I want to include this library into my makefile so that during linking it should be picked up from that path. ) That's also the way I associate resources like shaders. o baz. h and You must link against the compilation unit inc. exe and examp3. Could you please let me know how to add INCLUDES and LIB_INCLUDES in this makefile. cpp files. For example to include the X11 libraries in your search path in I want to compile all . Here is a crib to the canonical GNU make-variables that are typically operative in C I am new to Linux OS. Linking object build in sub directory in makefile. o, and need to link it against a shared library at . cpp) which worked fine. Now I've added some sources that are in a subdirectory, say subdir. I am trying to compile a program to have all libraries statically inside the final binary, but I still want glibc to be dynamically linked. cpp, DBC. h suffix) for each source file (. c. c in directory2 which uses myheader. In inc folder there is all of header files included and outside of this folder C files included. exe) in the same directory as the (CXX) $(CXXFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c # This is a link command. But for some reason my program doesn't seem to link. Use -l: instead of -l. I have two questions, how to actually write the Makefile, and the best How can I add a . Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. I tried the following makefile. You can think of a Makefile as a recipe for Makefiles are a simple build system for C++ projects. I want to create . I How to link shared library in Makefile. Then I moved all the methods in to their own . so as an actual link. cpp Window. o files in /obj into the output binary in the top-level folder /project. cpp files in my current directory and all subdirectories, and I'm at a loss for what I should do. C - Using shared library. Makefile link shared (dynamic) libraries. I would run make and it would compile. 0. include_directories(${PROJECT_SOURCE_DIR}/include) I have a static library (. cpp files without hard coding. A search path for libraries. You'll see I'm forcing a static link # against a library, but of This article presented everything you ever need to know when it comes to linking a shared library to your C or C++ application, built with the GCC toolchain. If you don't want to set a Certainly don't generate libtest. hpp and . The new_contents = "hello:\n\techo \$ $(cooly) " all: mkdir -p subdir printf $(new_contents) | sed -e 's/^ //' > subdir/makefile @echo "---MAKEFILE CONTENTS---" @cd subdir && cat makefile @echo "---END MAKEFILE One makefile for each directory: with implicit loading The most common way to handle multiple directories is to put a makefile in each directory which describes how to build everything in or The make utility uses a special plain-text file that you write that has to reside in the same directory as your program, and has to be called Makefile. If you were linking against shared libraries in . cpp file3. 3 Makefile dependency when creating shared library links. It is an option of the GNU ld linker:-l namespecIf namespec is of the form :filename, ld will search the library path for a file called filename, otherwise it will search the library path for a file called libnamespec That is, I want to compile all C files into a single S file and then assemeble all s files into corresponding object files and the link all object files into one executable. so. h (plus all the other directories By specifying folder/*. I'm new with makefiles and I'm trying to write one that compiles files from different folders. h header file, implemented and created . Because you have a dependency on the directory, that means the next time you run make dirs, make decides the targets are out of date. My executable is in the src directory. cpp CXX If libc. In visual studio and code::blocks i just set up the linker in the IDE, but cmake is a little hard for me to wrap my head around. dylib and In a standard Makefile, the CXXFLAGS macro defines flags for the C++ compiler. c includes rio. c source file contains all of the code and the header file contains the function prototypes, that is, just a declaration of which functions can be found in the source file. However, I use makefiles to automate my build process, and I'm not an expert when it comes to makefile magic. I have next to no experience with Makefiles, and am not really sure what to search for to accomplish this. You would use it like so in a makefile based project. In the above example, the suffix is -mt. o files (and . I'm using a Makefile to compile and link my source files with sfml libraries. If I have only one library to link with: add a library folder recursively in Makefile. a -lm if you like, you can use an option to tell gcc to look for libraries in the current directory: gcc -L. bin folder contains your . So you could specify the library include folder:-L. It has no main() function. Then you will need to add -L<path to lib directory> to the link step of the Makefile so that -lrtmidi will find the library file. in the "include" directory). obj then your problem is elsewhere - something in the makefile is asking for an object file in the current directory. dll DLL # libxxx. The library is a git repo, and so is my project (I own both). o -L. o: %. -L/dir/containing -lc. $(EXE): $(OBJ) $(FC) $(LDFLAGS) $(OBJ) $(LIBS) $(BLIBS) -o $(EXE) solution 2. h>; most likely, you need to add the maths library to the link line: -lm. c file which will use link the . External libraries are pre-compiled code that you can incorporate into your project to make use of existing functionality. I have a source directory in my project dir which contains subdirectories. This works perfectly. Try removing link_directories(${X11_LIBRARIES}), you should only link by target_link_libraries as you do in the next line. Since I do not wish to install OpenSSL-1. c{tmp\src\mystuff}. cpp are located in the current directory called Core. /folder *. I was guessing above that the libraries are in subdirectories like the headers, btw. 4. The math library has to be linked. cpp files: /src/ for binary files: /bin/ Then use the following Makefile at / You can give sensible names to the files like makefile. o files from src/ folder to obj/ folder after compilation. As to the libraries (X11, GL) you had to link, you're probably right in that something else already linked to them in this Makefile as earlier my lib location was prebuilt for room-common libraries later I changed and if it was in prebuilt directory also we can provide prebuilt directory path instead of above path Share Improve this answer By bundling -l options into $(LDFLAGS), the tutorial gets all the libraries before all the object files; so in your linkage, -lSDL2 is ignored and your linkage fails as observed. -lnameoflib However, i needed to integrate this pre-built library into an auto make file project. lib import library # # On windows (mingw): # libxxx. h: #ifndef SDV_H #define SDV_H extern void sdv_print_version(); #endif I am trying to create a shared library that is to be linked against OpenSSL-1. # written by Robert Duvall # modified by Owen Astrachan # and by Garrett Mitchener # ##### ##### # Application-specific variables # EXEC is the name of the executable file # SRC_FILES is a list To compile FreeImage as a C++ library, follow these steps : 1) Enter the FreeImage directory 2) Build the distribution : make -f Makefile. Typically installing the shared library development files installs the . so, you need to pass the linker flag as -labc. cpp Makefile So then I changed my Makefile to: I have a directory with multiple c source files (every file is a small program by itself) which I would like to compile all at once and output the binary for each one in the subdirectory bin/. For example, if you are using a sh-derived shell (anything other than csh or tcsh) you can do: A common convention in C programs is to write a header file (with . In my sample code, I restrict the search for makefiles to the subdirectories immediately below the parent directory. I have a server. In the libclass. a’ and searches several directories. 0) and I'm using gcc 3. – usr1234567. Skip to main content. c client: $(OBJECTS) $(CC) $(CFLAGS) $(OBJECTS) -o client $(LDFLAGS) $(LIBS) all:client I created a makefile and gave it the path to the . c in your case. Hi Following is the full procedure to add boost to cmake/make file. Each command line must start with a TAB character, not spaces. No needs to use path to the library in that case. When you copy the code to your makefile, please pay attention to the indented parts (recipe of each rule). 1. cpp files to g++. /libStanfordCPPLib/*. Add include_directories(. As a software developer, linking external libraries in your projects is a common task that you will encounter. To link, use something like $(CXX) $(CXXFLAGS) $(LDFLAGS) -o $@ $^ $(LDLIBS) – The files in my directory where: main. The -L option specifies a directory to be searched for libraries (static or shared). myProgram should depend on the library itself, rather than the contents of the library, and it is best to put the library options at the end: myProgram: libmylib. Meanwhile, using -L$(your lib path) -l$(your lib name) gcc/g++ argument to link shared library isn't a good choice. And I want to build everything only with one makefile in rootdir of project: So for my static library in c++ i did this makefile. c . I've been building a C++11 library, and the number of header/source files has grown to the point where compiling programs invoking it, entails passing 20+ . which works perfectly fine for linking libraries in nested sub-directories, I get the following error: % make -C out/build [ 30%] Built target C_LIBRARY [ 50%] Built target B_LIBRARY makefile; cmakelists-options; Share. At the moment I have the following in my makefile but this seems to miss a number of the cpp files: The original question author asked, in the comments on the question, for an example of using Automake, Libtool and LDADD to link a program compiled in one directory with a shared library compiled in a second directory. The links (for all files in . For now I moved . 2. a is executable which I don't think should be like that, right? If there is no Makefile, then make is using default rules, and you can either just create a makefile with. I'm also a bit confused about the directories and files you talk about. c file using a makefile. However, the library libdemo. With make I create a static library out of the the files demo1. I have linked them together at the same line. 0 system-wide, I downloaded and compiled it separately installing it into a folder inside my home @Rika ar takes the archive file name as its first non-option argument, so it require no -o option. prog from bin/ and libraries in a separate directory like lib. Currently I have this Makefile: lib folder contains . I've been reading up on shared libraries and it seems to be the best solution. C shared library problems. – John P. 9. Makefile to build shared library. The only difference between using an -l option and specifying a file name is that -l surrounds library with ‘lib’ and ‘. h or types. h but you did not tell the compiler where such headers live (i. h must be present, and you told the C++ source file that it needs header. Depending on the Makefile, it will often use a variable like CFLAGS, LIBS or LDFLAGS to pass extra options to the compiler. Perhaps another solution too. c gcc -o $@ $< -Wl,-Bstatic -lm -Wl,-Bdynamic Share. nix and use them: make -f makefile. where libSOIL. – Here is a complete ready-to-go version of the Makefile. you did not tell it to link in the library yet. In directory2, I'm writing a program which uses them. cpp contains a line that includes a header file outside the current directory: however, I would like to use my makefile in order to automatically link the math library and whatever other standard libraries I use in the future. h vs. To enforce that, system requires you to add some entries in "DEPENDS" section. CXX = g++ CXXFILES = file1. I'm familiar with how to create basic makefiles, but I'm trying to create a . I now want to add an additional library to this make file, I have tried copy and pasting the header and . . I can't change the contents of these library directories in the filesystem, so I need to find a way to tell the Makefile to link lncurses library from path A and link lthr library from path B instead using the lthr from path A. I want a makefile which will compile and link them and give examp1. To link against all the Boost library you use the following: target_link_libraries($ You can use a rule like this: {src\mystuff}. But in any case, the main thing you seem to have left out is the library itself from the command line. Linking external libraries in C++ can be challenging, but by following the steps outlined in this article, you can efficiently link libraries using CMake or Makefiles. For shared libraries it's not so bad, but certainly for static libraries you have to list them in a specific order, because the linker is a single-pass linker so order matters. c files. Makefile not linking the . include folder refers your header . for . Case sensitive, make sure to check for spelling errors, etc. c files in a different directory, and then link them, just like you're compiling and linking You should specify a dependency for every library you want to link. I have an object file main. c file from Where SRC defines the source directory and BIN the bin directory. However if I want to have a list of all directories in another directory using. cpp -o Test It creates an runnable Test. Collecting files in a directory is good practice, and once you have it there it's redundant to add the library name as a prefix to every file (foobar/foobar_types. For example: In a directory there are 3 c++ files, such as examp1. dylib for only 2 . I'm trying to build on Linux with generated makefiles using - You build the library b in the same project, so you may specify just b for target_link_libraries, and CMake automatically finds this target and performs appropriate linking. 2p which depends on libssl1. win nix: make -f makefile. I have this folder/files structure:. In my makefile I have Make sure that the -L option appears ahead of the -l option; the order of options in linker command lines does matter, especially with static libraries. In general that means that you must supply all object files that contain functions that are used in main. o client When I run make, I get the following error: "undefined reference to rint" So it is not able to link the math library. Makefile to compile shared library with folders. dylib (like a . My makefile looks something like this. so # target lib #TARGET_LIB += lib2. 1 which internally uses libssl1. How could I accomplish something like that in a Makefile My makefile looks like this- CC=gcc CFLAGS=-Wall LDFLAGS= -rpath='. A sample makefile and how it works. wallyk AUX_SOURCE_DIRECTORY. server. a static library # libxxx. /libname. o (inside libs/ folder) and then link each app. This answer is specially developed for the novice programmer in cpp. obj to build? I would guess that in that rule you are failing to specify $(OUTPUT_DIR)\myfile. In general it's a bad idea to just "grab all the libraries". h Window. cpp) MakeFile: Link a library - mingw. cpp for . ' In front of it. o files in the /obj folder, then link all the . So generating testDynamic does not need it as it will load library dynamically, it does not require being linked to it. Stack The second makefile is adding the library but not path of the header files (interface) to be used to compile. no cp -r); guaranteed consistency (i. In this structure, each library resides in its own directory. Lines 39-40 link all the object files together into a single executable. really means: In the current directory; it does not mean: In the same directory as the executable file! If your program is stored in the directory . Also, -L/lib doesn't do anything either because that is a standard library path. 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. You have the directories for the header and library there with -I and -L, but you never specify a library to link with. To do this, tell your compiler to also include that directory with -I like this: g++ -o out -I . I have the following Makefile but it doesn't work for me. c CXXFLAGS = -g -o prog -D_GNU flag. nix and use make win or make nix First, try to make sure all paths you give are relative to the Makefile. Find all source files in a directory. –. h files and creates a symbolic link libtest. /Test/*/) all: echo $(DIRECTORIES) I get a list of ALL files If you want to link against installed libraries in a given directory, LIBDIR, you must use the `-LLIBDIR' flag during linking and do at least one of the following: add LIBDIR to the `LD_LIBRARY_PATH' environment variable during execution; add LIBDIR to the `LD_RUN_PATH' environment variable during linking The makefile is pulling both libraries from the same location which is not what I want. o which you obtain by compiling inc. You need to name your Makefile Makefile. cpp file2. exe, examp2. dll. Perhaps it could be a solution for I'm trying to link a library from a different folder. I tried to give: program_LIBRARY_DIRS := /home/Desktop/kk/stack and in linking step I gave: $(LINK. o in lib. o -lmylib -lm I am trying to link some headers and libraries in my header file. a -o $(program_NAME) But the makefile is not able to pick up the library from the path mentioned. : AM_LDFLAGS = -lboost_system-mt Note that Boost libraries generally end in a suffix—a sequence of letters that indicates the build configuration. so files) in a path to a built target. How do includee all libraries from a directory in a Makefile? Say I want to include all libraries in the directory /libdir, how would I do this? The result should be something like: INCLUDES = -I/libdir/lib1 -I/libdir/lib2 -I/libdir/lib3 Specify Library Flags: To link external libraries in a Makefile, you need to specify the necessary flags that tell the compiler where to find the library files and how to link them. -l is the name of the library you want to link to. c files in src\mystuff and put the object files in tmp\src\mystuff. Modified 3 years, 10 months ago. -lmyLibrary is only necessary when linking program with dynamic library. o files. How to create dynamic and static library in Makefile. Here is my Makefile (in the src/ directory): # make -> compile the shared library "libfoo. Library path has been specified in -L. If you want to add the boost library support with help of Makefile you need to specify library path (with -L option) and libraries (with -l option). Without seeing your Makefile I can't say how exactly you add those, but looks like you need to modify DPLIBS to include -L/-l rules for boost. a and . h). I'm surprised your compiler actually does anything since your SOURCES variable is a directory, not a list of . 0a version. It should probably look like: You told the Makefile that include/header. a or -l:glfw3. Ask Question Asked 5 years, 3 months ago. c file which consists of the main program which has a main() function. You probably need to edit the Makefile appropriately. After run cmake and Makefile, I got these link error: Not in this case, but in general. The name of the binary should be the one of the c source file, but without the . The code I have written to achieve this in makefile is as below: dirs:=$(root_folder)/*/ SOURCE:=$(foreach dir,$(dirs),$(wildcard $(dir)/*. so/libXYZ. You can change every one of them according to your headers location. Dynamic Link Library using makefile. Choose the specific library you want to link to by doing: -l:libglfw3dll. Follow I am very new to C++ and using Makefiles in general, and on top of it all, the target runs kind of a proprietary linux version, so I cannot provide much information about it. a is a static library (I linked it by using -L. (Note that you omit the lib prefix for the -l command) I have a question regarding compiling and linking in Makefile (and perhaps in general). # # On *nix: # libxxx. Modified 5 years, 3 months ago. I am assuming the directory exe/ already exists and always will be there. While you have the In C++, library files are not enough. I'd like to to have g++ search for header files in the project's root directory, so I can avoid different include paths for same header files across multiple source files. Here is a simple Makefile example: INCLUDE = \ $(shell find ~/code/src/root/ -type d You would need to pass the list of library names to the linker when building the final binary. This is the makefile I am using: CC=gcc CFLAGS=-Wall LDFLAGS=-lm OBJECTS=client. I have a program called server. I know that LD_LIBRARY_PATH is evil and it's a good habit to avoid using it. Because it's work environment, I don't have the right to modify anything in the openssl library To sort out your other issues. Prepare your folder with the following directory. a file in directory1. so files Recently, I try to create an makefile as below: all: g++ test. hpp files.
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