Why doesn't find_library() want to search inside CMAKE_LIBRARY_PATH?

Question

CMake

It searches with the full path, but not so (see below).

set(CMAKE_LIBRARY_PATH C:/Users/me/Desktop/)

find_library(av_codec
    NAMES
        avcodec
    HINTS
         ffmpeg-4.3-win64-dev/lib
    REQUIRED
)

message(${av_codec})

How to explain it? Here it is written in black and white:

Semicolon-separated list of directories specifying a search path for the find_library() command

In addition, it REQUIREDdoes not break the configuration, despite the fact that av_codec-NOTFOUND(through message()). Are these CMake bugs or what?

Answer 1

I figured it out, there is for this PATH_SUFFIXES, but PATHS/ HINTSdoes not work like that ( paths are not concatenated ):

set(CMAKE_LIBRARY_PATH C:/Users/march/Desktop/)

find_library(av_codec
    NAMES
        avcodec
    PATH_SUFFIXES
        ffmpeg-4.3-win64-dev/lib/
    REQUIRED
)

message(${av_codec})