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Asked: 2026-05-27T10:49:59+00:00

Using glew, I’m trying to link the simple program #include </usr/include/GL/glew.h> int main (int

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Using glew, I’m trying to link the simple program

#include </usr/include/GL/glew.h>

int main (int argc, const char * argv[])
{

    glewInit();

    return 0;
}

in XCode 4, under OSX Lion, which reports the error:

ld: library not found for -lGLEW.1.7.0
Command /Developer/usr/bin/clang++ failed with exit code 1

however, the error output also reports the following flags for the linker

-mmacosx-version-min=10.7 -L/usr/lib -lGLEW.1.7.0 -lglfw -framework OpenGL -framework Cocoa

and indeed, libGLEW.1.7.0 does reside in /usr/lib

Moreover, if I try to build the program by hand, with 

  gcc -L/usr/lib -lGLEW.1.7.0 main.cpp

I get an a.out file without any errors reported (which if run causes a segmentation fault, but maybe that’s to be expected)

Any ideas on what might be causing XCode to produce this error and how it could be avoided?

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1 Answer

  1. Editorial Team

    (I have removed this from an edit to the question and posted it as an answer, as per leppie’s suggestion)

    I might have found the answer in some details I had considered unimportant in my original post. So here goes, in case others might encounter a similar problem.

    Apparently, XCode4 projects use clang++ by default, which in the link phase accepts a parameter -isysroot (which apparently ld does not accept).

    Now, if in your build settings (as was my case) your Base SDK has been defined as something other than Current Mac OS, the parameter -isysroot will be introduced with the value of a directory pointing to that SDK, thus (this is my guess) prepending this to all other lib directories you might be including with -L.

    In my case, -L/usr/lib was effectively turning into -L/Developer/SDKs/MacOSX10.7.sdk/usr/lib which does exist and did not contain libGLEW, hence the error “library not found”

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