[FlightGear-Devel readers: this is another installment in my quest
to get FlightGear compiled under Mac OS X. I now have a good lead on
the final link failure, I think. If you have any knowledge of linker
naming conventions, symbol tables, and the like, I would appreciate
your comments. Thanks. P.S. Everything is being built from CVS.]
Previous make's were failing, unable to find gen_leaf or
ssgVtxTable::ssgVtxTable.
Sometime recently the call to gen_leaf was removed from the CVS code.
Instead, three other symbols are now not being found. Here's the final
make command along with output:
david@Cynosure ~/FlightGear/src/main
$ make
g++ -DPKGLIBDIR=\"/Users/david/lib/FlightGear\" -g -O2 -D_REENTRANT
-L/Users/david/lib -L/usr/X11R6/lib -o fgfs main.o fg_commands.o fg_init.o fg_io.o
fg_props.o fgfs.o globals.o logger.o options.o splash.o util.o viewer.o viewmgr.o
location.o ../../src/Aircraft/libAircraft.a ../../src/ATC/libATC.a
../../src/Autopilot/libAutopilot.a ../../src/Cockpit/libCockpit.a
../../src/Cockpit/built_in/libBuilt_in.a ../../src/Controls/libControls.a
../../src/FDM/libFlight.a ../../src/FDM/Balloon/libBalloon.a
../../src/FDM/ExternalNet/libExternalNet.a ../../src/FDM/JSBSim/libJSBSim.a
../../src/FDM/YASim/libYASim.a ../../src/FDM/JSBSim/filtersjb/libfiltersjb.a
../../src/FDM/LaRCsim/libLaRCsim.a ../../src/FDM/UIUCModel/libUIUCModel.a
../../src/GUI/libGUI.a ../../src/Input/libInput.a
../../src/Instrumentation/libInstrumentation.a ../../src/Model/libModel.a
../../src/Navaids/libNavaids.a ../../src/Scenery/libScenery.a
../../src/Scripting/libScripting.a ../../src/Sound/libSound.a
../../src/Airports/libAirports.a ../../src/Network/libNetwork.a
../../src/NetworkOLK/libNetworkOLK.a ../../src/Objects/libObjects.a
../../src/Systems/libSystems.a ../../src/Time/libTime.a
../../src/Environment/libEnvironment.a -lsgroute -lsgsky -lsgephem -lsgtiming -lsgio
-lsgscreen -lsgmath -lsgbucket -lsgdebug -lsgmagvar -lsgmisc -lsgxml -lsgserial
-lsgthreads -lplibpu -lplibfnt -lplibjs -lplibnet -lplibssg -lplibsg -lplibul
-lplibpsl -lmk4 -lz -lpthread -lm -framework GLUT -framework OpenGL -framework Carbon
-lobjc -lplibsl -lplibsm -framework IOKit -framework CoreFoundation -lm
ld: warning table of contents of library: ../../src/FDM/JSBSim/libJSBSim.a not sorted
slower link editing will result (use the ranlib(1) -s option)
ld: Undefined symbols:
trTileSize(_TRctx*, long, long, long)
trImageSize(_TRctx*, long, long)
trTileBuffer(_TRctx*, unsigned long, unsigned long, void*)
ssgVtxTable::ssgVtxTable[in-charge](unsigned, ssgVertexArray*, ssgNormalArray*,
ssgTexCoordArray*, ssgColourArray*)
make: *** [fgfs] Error 1
I have been using nm to poke around and believe I know what is going on,
even if I don't know how to fix it:
david@Cynosure ~
$ nm -o lib/libsgscreen.a FlightGear/src/GUI/gui_funcs.o | egrep
'trTileSize|trImageSize|trTileBuffer'
lib/libsgscreen.a:tr.o:00001564 S _Z10trTileSizeP6_TRctxiii.eh
lib/libsgscreen.a:tr.o:0000158c S _Z11trImageSizeP6_TRctxii.eh
lib/libsgscreen.a:tr.o:000001d4 T __Z10trTileSizeP6_TRctxiii
FlightGear/src/GUI/gui_funcs.o: U __Z10trTileSizeP6_TRctxlll
lib/libsgscreen.a:tr.o:000003c8 T __Z11trImageSizeP6_TRctxii
FlightGear/src/GUI/gui_funcs.o: U __Z11trImageSizeP6_TRctxll
lib/libsgscreen.a:tr.o:0000036c T __Z12trTileBufferP6_TRctxjjPv
FlightGear/src/GUI/gui_funcs.o: U __Z12trTileBufferP6_TRctxmmPv
If you look closely at the "T" lines and the "U" lines, you will see that
the symbol names do not match! No wonder the final link fails. I guess
I need some way to get the compiler to generate the same symbol names.
The other unfound symbol, ssgVtxTable::ssgVtxTable[in-charge] is trickier,
but I found it. The sad thing is, the symbol names match, so I don't
know why the symbol is not found.
david@Cynosure ~
$ nm `find plib -type f -name \*.o -print` | egrep ssgVtxTable | egrep
'^.........[TU]' | sort +0.11 | uniq > foo
david@Cynosure ~
$ nm `find FlightGear -type f -name \*.o -print` | egrep ssgVtxTable | egrep
'^.........[TU]' | sort +0.11 | uniq > bar
david@Cynosure ~
$ cat bar
U
__ZN11ssgVtxTableC1EmP14ssgVertexArrayP14ssgNormalArrayP16ssgTexCoordArrayP14ssgColourArray
david@Cynosure ~
$ egrep
__ZN11ssgVtxTableC1EmP14ssgVertexArrayP14ssgNormalArrayP16ssgTexCoordArrayP14ssgColourArray
foo
U
__ZN11ssgVtxTableC1EmP14ssgVertexArrayP14ssgNormalArrayP16ssgTexCoordArrayP14ssgColourArray
0000050c T
__ZN11ssgVtxTableC1EmP14ssgVertexArrayP14ssgNormalArrayP16ssgTexCoordArrayP14ssgColourArray
Regards,
David K. Drum
[EMAIL PROTECTED]
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