Not sure if anyone bumped into the same problem as me.
A fresh installation of Ubuntu 14.04, Catalyst Driver 2014/09/29 and the latest APP SDK 2.9.1. All samples crash at the clGetPlatformInfo(). After some searching, I found the problem is Ubuntu has a native libOpenCL.so at /usr/lib/libOpenCL.so. The samples are mistakenly linked to that .so which doesn't work later. After renaming that .so to something else and rebuild the samples, everything works fine now.
P.S., if one saw OPENCL_LIBRARIES not found in the execution of CMAKE, edit the CMAKELists.txt and change a few lines to
# Set platform
if( NOT UNIX )
set(PLATFORM win)
else()
set(PLATFORM lnx)
SET(CMAKE_FIND_LIBRARY_PREFIXES "lib")
SET(CMAKE_FIND_LIBRARY_SUFFIXES ".so" ".a" ".so.1")
endif()
find_library( OPENCL_LIBRARIES
NAMES OpenCL
HINTS ../../../../lib/ $ENV{AMDAPPSDKROOT}/lib/${BITNESS_SUFFIX}
# PATH_SUFFIXES ${PLATFORM}${BITNESS} ${BITNESS_SUFFIX}
)
A sample CMakeLists.txt are attached.
