[CMake] Cross-compiling on OS X/x86 for Linux/ARM, linking a library

[Vladimir Lebedev-Schmidthof]

Hello everyone,

Two compiling platforms - Linux and OS X.
Same project, same cmake (2.6.4), same target (Linux/ARM).

Sources compiles well (GNU C/C++) but linking is different.

Everything is fine on Linux.

comparing make VERBOSE=1 outputs:

OS X: [path-to]/gcc -march=armv5te -mtune=xscale -msoft-float -fpic - 
mthumb-interwork -ffunction-sections -funwind-tables -fstack-protector  
-fno-short-enums -dynamiclib -nostdlib -Wl,-shared,-Bsymbolic -Wl,- 
rpath-link=[path-to]/usr/lib -Wl,--whole-archive -Wl,--no-undefined - 
Wl,-rpath-link=[path-to]/usr/lib -o libmylib.so -install_name /Users/ 
dair/Project/native/libmylib.so [source-files]

Linux: [path-to]/gcc  -fPIC -march=armv5te -mtune=xscale -msoft-float - 
fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack- 
protector -fno-short-enums -nostdlib -Wl,-shared,-Bsymbolic -Wl,-rpath- 
link=[path-to]/usr/lib -Wl,--whole-archive -Wl,--no-undefined -Wl,- 
rpath-link=[path-to]/usr/lib -shared -Wl,-soname,libmylib.so -o  
libmylib.so [source-files]

The problem is "-install_name" option. Cmake generates that in OS X  
but GCC cross-compiler does not accept that. I can successfully link  
the library (manually) by removing this option.

I set CMAKE_SYSTEM to Linux, even added "SET(APPLE 0)" but  
install_name option is still generating.

Also, on OS X Cmake generates CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS as "- 
dynamiclib -headerpad_max_install_names" which I don't need (- 
headerpad_max_install_names is not recognized by my compiler) but I  
can obviously set that property to what I need.

Please advise.

--
Thanks in advance,
Vladimir