Link error when working with XCode

[thomas]

Hi,

When linking ReCast, an open-source project, I got the following
errors.

-----error msg----
Ld RecastDemo/Bin/Debug/RecastDemo.app/Contents/MacOS/RecastDemo
normal x86_64
cd /Users/mingzhang/Root/Project/ReCast/recastnavigation-read-only
setenv MACOSX_DEPLOYMENT_TARGET 10.6
/Developer/usr/bin/g++-4.2 -arch x86_64 -L/Users/mingzhang/Root/
Project/ReCast/recastnavigation-read-only/RecastDemo/Bin/Debug -L/
Users/mingzhang/Root/Project/ReCast/recastnavigation-read-only/
RecastDemo/Contrib/SDL/SDL.framework/Versions/A/Debug -L/Users/
mingzhang/Root/Project/ReCast/recastnavigation-read-only/RecastDemo/
Contrib/SDL/SDL.framework/Versions/A -F/Users/mingzhang/Root/Project/
ReCast/recastnavigation-read-only/RecastDemo/Bin/Debug -filelist /
Users/mingzhang/Root/Project/ReCast/recastnavigation-read-only/
RecastDemo/Bin/RecastNavigation.build/Debug/RecastDemo.build/Objects-
normal/x86_64/RecastDemo.LinkFileList -mmacosx-version-min=10.6 -Wl,-
search_paths_first -headerpad_max_install_names /Users/mingzhang/Root/
Project/ReCast/recastnavigation-read-only/DebugUtils/Debug/
libDebugUtils.a /Users/mingzhang/Root/Project/ReCast/recastnavigation-
read-only/Detour/Debug/libDetour.a /Users/mingzhang/Root/Project/
ReCast/recastnavigation-read-only/DetourCrowd/Debug/libDetourCrowd.a /
Users/mingzhang/Root/Project/ReCast/recastnavigation-read-only/
DetourTileCache/Debug/libDetourTileCache.a /Users/mingzhang/Root/
Project/ReCast/recastnavigation-read-only/Recast/Debug/libRecast.a -
lSDL -framework Cocoa -framework AGL -framework OpenGL -lSDL -
framework Cocoa -framework AGL -framework OpenGL -o /Users/mingzhang/
Root/Project/ReCast/recastnavigation-read-only/RecastDemo/Bin/Debug/
RecastDemo.app/Contents/MacOS/RecastDemo

ld: warning: directory '/Users/mingzhang/Root/Project/ReCast/
recastnavigation-read-only/RecastDemo/Contrib/SDL/SDL.framework/
Versions/A/Debug' following -L not found
ld: library not found for -lSDL
collect2: ld returned 1 exit status
Command /Developer/usr/bin/g++-4.2 failed with exit code 1
-----end----

The project is configured with cmake-2.8.app.
The error says that the library "SDL" cannot be found. But I'm sure
that the SDL library locates in "-L/Users/mingzhang/Root/Project/
ReCast/recastnavigation-read-only/RecastDemo/Contrib/SDL/SDL.framework/
Versions/A ".
Why cannot it be found?

Any help is appreciated, thanks!

--tom