<div>I have a problem with building/linking to an external library I've called libfio. The library builds, and I can link programs against it from the command line. However my final plugin always comes up with a "ld: symbol(s) not found". I have several other libraries which are linked against just fine in my plugin, it is only this one which creates a problem.</div>
<div><br></div><meta charset="utf-8"><meta charset="utf-8"><div>I'm on OS X 10.6, using gcc version 4.2.1 (Apple Inc. build 5664). I have tried building it both as a shared and static library, from both CMake and externally (then linking from within CMake). I have several other libraries I rely on which function perfectly well under any of the previous setups: {shared,static} x {built within plugin cmake, built externally} x {c,cxx}. However with this set of .c files I always get a linking error, and it's the same for any of the previous permutations. Under any configuration I'm able to link against it from the command line. That is to say for the example for a shared library built within the PV plugin CMake: libfio.dylib is created within my build directory ParaViz_build, and doing e.g. gcc grafic2csv.c -lfio -L/Users/corbett/Documents/Projects/pvaddons/ParaViz/ParaViz_build/ -o grafic2csv has no linking errors, where grafic2csv contains the identical code which later offends the linker within my plugin (see below for sample).</div>
<meta charset="utf-8"><div><br></div><div>Example make output for a shared library built within the PV Plugin CMake:</div><div>...</div><div>[ 11%] Built target TipsyHelpers</div><div>[ 13%] Building C object CMakeFiles/fio.dir/fio/fio.c.o</div>
<div>[ 14%] Building C object CMakeFiles/fio.dir/fio/romberg.c.o</div><div>Linking C shared library libfio.dylib</div><div>[ 14%] Built target fio</div><div>[ 16%] Building C object CMakeFiles/SQLitelib.dir/sqlitelib/sqlite3.c.o</div>
<div>Linking C static library libSQLitelib.a</div><div>[ 16%] Built target SQLitelib</div><div>..</div><div>[ 98%] Building CXX object CMakeFiles/AstroVizPlugin.dir/AstroVizPlugin_Plugin.cxx.o</div><div>[100%] Building CXX object CMakeFiles/AstroVizPlugin.dir/moc_AstroVizPlugin_Plugin.cxx.o</div>
<div>Linking CXX shared library libAstroVizPlugin.dylib</div><div>Undefined symbols:</div><div> "fioOpen(char const*, double, double)", referenced from:</div><div> vtkGraficReader::RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*)in vtkGraficReader.cxx.o</div>
<div>ld: symbol(s) not found</div><div>collect2: ld returned 1 exit status</div><div>make[2]: *** [libAstroVizPlugin.dylib] Error 1</div><div>make[1]: *** [CMakeFiles/AstroVizPlugin.dir/all] Error 2</div><div>make: *** [all] Error 2</div>
<div><br></div><div><br></div><div><br></div><div>Example CMake for building a static library with the PV Plugin CMake:</div><div><div><br></div><div>ADD_LIBRARY(</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>fio</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>STATIC</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>fio/fio.c</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>fio/romberg.c</div>
<div>)</div><div>SET_TARGET_PROPERTIES(fio PROPERTIES LINKER_LANGUAGE C)</div><div>SET_TARGET_PROPERTIES(fio PROPERTIES COMPILE_FLAGS "-fPIC")</div><div><br></div><div>TARGET_LINK_LIBRARIES(</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>AstroVizPlugin</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>fio</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>TipsyHelpers</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>SQLitelib</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>)</div></div><div><br></div>