libjpeg: /usr/lib/x86_64-linux-gnu/libjpeg.a /usr/lib/x86_64-linux-gnu/libjpeg.so

/my/jpeg/instalation/lib/libjpeg.so

cmake .. -DCMAKE_PREFIX_PATH=/my/jpeg/instalation

cmake ..

find_package(JPEG NO_SYSTEM_ENVIRONMENT_PATH REQUIRED)

find_package(JPEG REQUIRED)

find_package(JPEG PATHS ${CMAKE_PREFIX_PATH} NO_DEFAULT_PATH)

CMake Error at CMakeLists.txt:7 (find_package):
  Could not find a package configuration file provided by "JPEG" with any of
  the following names:

    JPEGConfig.cmake
    jpeg-config.cmake

  Add the installation prefix of "JPEG" to CMAKE_PREFIX_PATH or set
  "JPEG_DIR" to a directory containing one of the above files.  If "JPEG"
  provides a separate development package or SDK, be sure it has been
  installed.