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POCan't get GLFW to link
 

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  1. POCan't get GLFW to link
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    <p>I am trying to compile the below test program:</p> <pre><code>#include &lt;GL/glfw.h&gt; int main(int argc, char** argv) { if(!glfwInit()) { return -1; } if(!glfwOpenWindow(640, 480, 8, 8, 8, 0, 24, 0, GLFW_WINDOW)) { return -1; } while(glfwGetWindowParam(GLFW_OPENED)) { glfwSwapBuffers(); } return 0; } </code></pre> <p>but I always get <code>undefined reference</code> errors in regards to the GLFW functions.</p> <p>Below is my makefile:</p> <pre><code>CXX = clang++ CXXFLAGS = -Wall -std=c++0x LDFLAGS = -lglfw OBJ_DIR = bin LIB_DIR = -L/usr/lib INC_DIR = -I/usr/include SOURCE = main.cpp OBJECTS = ${SOURCE:%.cpp=$(OBJ_DIR)/%.o} EXECUTABLE = hello all: init $(OBJECTS) $(EXECUTABLE) $(EXECUTABLE): $(CXX) $(CXXFLAGS) $(LDFLAGS) $(LIB_DIR) -o $@ $(OBJECTS) $(OBJ_DIR)/%.o: %.cpp $(CXX) $(INC_DIR) -c $&lt; -o $@ init: @mkdir -p "$(OBJ_DIR)" clean: @rm -rf $(OBJ_DIR) $(EXECUTABLE) </code></pre> <p>I definitely have <code>glfw.h</code> and <code>libglfw.a/.so</code> as when I run <code>locate glfw</code> I get:</p> <pre><code>:~$ locate glfw /usr/include/GL/glfw.h /usr/lib/libglfw.a /usr/lib/libglfw.so /usr/lib/libglfw.so.2 /usr/lib/libglfw.so.2.6 </code></pre> <p>The output of <code>nm /usr/lib/libglfw.a | grep glfwInit</code>:</p> <pre><code>:~$ nm /usr/lib/libglfw.a | grep glfwInit U _glfwInitialized U _glfwInitialized U _glfwInitialized U _glfwInitialized 0000000000000000 B _glfwInitialized 0000000000000000 T glfwInit U _glfwInitialized U _glfwInitialized U _glfwInitialized U _glfwInitialized U _glfwInitialized U _glfwInitJoysticks U _glfwInitTimer 00000000000000c0 T _glfwInitJoysticks 0000000000000000 T _glfwInitTimer </code></pre> <p>and the verbose message from clang:</p> <pre><code>clang++ -I/usr/include -c main.cpp -o bin/main.o clang++ -Wall -std=c++0x -Wl --verbose -lglfw -lGL -lGLU -L/usr/lib -o hello bin/main.o Ubuntu clang version 3.0-6ubuntu3 (tags/RELEASE_30/final) (based on LLVM 3.0) Target: x86_64-pc-linux-gnu Thread model: posix clang: warning: argument unused during compilation: '-std=c++0x' "/usr/bin/ld" -z relro --hash-style=gnu --as-needed --build-id --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o hello /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crt1.o /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/4.6/crtbegin.o -L/usr/lib -L/usr/lib/gcc/x86_64-linux-gnu/4.6 -L/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu -L/lib/x86_64-linux-gnu -L/lib/../lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/4.6/../../.. -L/lib/x86_64-linux-gnu -L/lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib -lglfw -lGL -lGLU bin/main.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-linux-gnu/4.6/crtend.o /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crtn.o bin/main.o: In function `main': main.cpp:(.text+0x17): undefined reference to `glfwInit' main.cpp:(.text+0x76): undefined reference to `glfwOpenWindow' main.cpp:(.text+0x97): undefined reference to `glfwGetWindowParam' main.cpp:(.text+0xa7): undefined reference to `glfwSwapBuffers' clang: error: linker command failed with exit code 1 (use -v to see invocation) make: *** [hello] Error 1 </code></pre> <p>It seems to not be finding the library?</p>
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    1. USLerp
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    1. COAdd `-Wl,--verbose` to `LDFLAGS` and see if the correct library is being found. Also, run `nm` on the library file to make sure the undefined references are really in the library file.
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      1. POCan't get GLFW to link
      1. USMichael Burr
    2. COI've updated my post with the output of the messages. It seems to not be finding the libraries?
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      1. POCan't get GLFW to link
      1. USLerp
 

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