How to use CHECK_LIBRARY_EXISTS in cmake?

Here’s what I have in my CMakeLists.txt:

link_directories( "/usr/local/lib" )
include(CheckLibraryExists)
CHECK_LIBRARY_EXISTS( "libmali-midgard-t76x-r9p0-r0p0.so" "gbm_create_device" "" MALI )

Result:

Looking for gbm_create_device in libmali-midgard-t76x-r9p0-r0p0.so - not found

The symbol exists in that library:

$ nm -D /usr/local/lib/libmali-midgard-t76x-r9p0-r0p0.so | egrep gbm_create_device
001b245c T gbm_create_device

Why cmake doesn’t find that?

Answer

It was dependencies.

CHECK_LIBRARY_EXISTS is much more complex than nm -D. CMake actually creates a C project that references that library, and tries to link it.

I missed some dependencies used by that library (libdrm-dev, libxcb-dri2-0, libx11-xcb-dev), so the linker failed.

Resolved by looking what’s in CMakeFiles folder, it contains much more detailed logs.