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POHow to set the runtime path (-rpath) of an executable with gcc under Mac OSX?
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  1. POHow to set the runtime path (-rpath) of an executable with gcc under Mac OSX?
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    copied!<p>I want to set under Mac OSX the runtime path of an executable (for the linker) at compile time, such that shared libraries at non-standard locations are found by the dynamic linker at program start.</p> <p>Under Linux this is possible with <code>-Xlinker -rpath -Xlinker /path/to</code> (or using <code>-Wl,-rpath,/path/to</code>) and under Solaris you can add <code>-R/path/to</code> to the compiler command line.</p> <p>I found <a href="http://blogs.oracle.com/dipol/entry/dynamic_libraries_rpath_and_mac" rel="noreferrer">some information</a> that Mac OS X gcc has -rpath support since 10.5, i.e. since ~ 2008.</p> <p>I tried to get it working with a minimal example - without success:</p> <pre><code>$ cat blah.c int blah(int b) { return b+1; } </code></pre> <p>And:</p> <pre><code>$ cat main.c #include &lt;stdio.h&gt; int blah(int); int main () { printf("%d\n", blah(22)); return 0; } </code></pre> <p>Compiled it like this:</p> <pre><code>$ gcc -c blah.c $ gcc -dynamiclib blah.o -o libblah.dylib $ gcc main.c -lblah -L`pwd` -Xlinker -rpath -Xlinker `pwd`/t </code></pre> <p>Now the test:</p> <pre><code>$ mkdir t $ mv libblah.dylib t $ ./a.out dyld: Library not loaded: libblah.dylib Referenced from: /Users/max/test/./a.out Reason: image not found Trace/BPT trap </code></pre> <p>Thus the question: How to I set the runtime path for the linker under Mac OSX?</p> <p>Btw, setting <code>DYLD_LIBRARY_PATH</code> works - but I don't want to use this hack.</p> <p><strong>Edit:</strong> Regarding <code>otool -L</code>:</p> <pre><code>$ otool -L a.out a.out: libblah.dylib (compatibility version 0.0.0, current version 0.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.2.1) </code></pre> <p>It seems that <code>otool -L</code> only prints the library names (and probable the locations at link time) the executable was linked against and no runtime path information.</p>
 

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