DLib is manually installed to /usr/local/lib ...

[jiapei100]

Hi, I actually have manually installed DLib to /usr/local/lib, how should I define DLib_DIR ?

I don't have
DLibConfig.cmake
dlib-config.cmake
but with the following dlib.pc

% cat /usr/local/lib/pkgconfig/dlib.pc 
libdir=/usr/local/lib
includedir=/usr/local/include

Name: dlib
Description: Numerical and networking C++ library
Version: 19.17.0
Libs: -L${libdir} -ldlib
Cflags: -I${includedir}
Requires: libpng

The current ERROR is:

 CMake Error at applications/badslam/CMakeLists.txt:7 (find_package):
   By not providing "FindDLib.cmake" in CMAKE_MODULE_PATH this project has
   asked CMake to find a package configuration file provided by "DLib", but
   CMake did not find one.

   Could not find a package configuration file provided by "DLib" with any of
   the following names:

     DLibConfig.cmake
     dlib-config.cmake

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

Can anybody help to fix this issue?

Thank you
Pei

[puzzlepaint]

Hi, does /usr/local/include/DLib/ contain a file DLibConfig.cmake? If yes, you could set DLib_DIR to this directory. Otherwise, it would be a possibility to write a custom DLibConfig.cmake that points to your installation directories. As an example, here is the content of /usr/local/include/DLib/DLibConfig.cmake on my system:

FIND_LIBRARY(DLib_LIBRARY DLib
    PATHS "/usr/local/lib"
)
FIND_PATH(DLib_INCLUDE_DIR DLibConfig.cmake
    PATHS "/usr/local/include/DLib" 
)
LIST(APPEND DLib_INCLUDE_DIR
  ${DLib_INCLUDE_DIR}/../ ${DLib_INCLUDE_DIR}/../DUtils
  ${DLib_INCLUDE_DIR}/../DUtilsCV ${DLib_INCLUDE_DIR}/../DVision)
SET(DLib_LIBRARIES ${DLib_LIBRARY})
SET(DLib_LIBS ${DLib_LIBRARY})
SET(DLib_INCLUDE_DIRS ${DLib_INCLUDE_DIR})

[brookman]

@jiapei100 You have probably installed the wrong library. There are two unrelated libraries which have the same name (but different capitalization in the name):

• dlib.net (the wrong one)
• DLib (the right one)

I made the same mistake and lost a few hours because of it. ^^'

[puzzlepaint]

Indeed, the .pc file referenced above contains Description: Numerical and networking C++ library, which I overlooked when I first replied. I just added a warning about this to the Readme to hopefully prevent this from happening to more people.

[jiapei100]

@brookman

Thank you @brookman . There are still compatibility issue:

dorian3d/DLib#23