So I am writing a CMake module to find some libraries which is being used a lot
in our company. These libraries all have different versions and are such a mess
here. In a certain library, even the name of header files and binary files
don't match. So I am writing a CMake script to handle all the problems of
finding each library once and for all. What I have in my mind is to write
something like how we find boost packages but include the version of each
component as well. Something like this:find_package(OrgName COMPONENTS
librarya-1.4.3 libraryb-2.3.1 libraryc-3.6.0)So I created a FindOrgName.cmake
file and iterated on the requested components, then I processed the string
which is passed and gained the library name along with its version information
something like this (never mind the difference between include and binary
files):IF(OrgName_FIND_COMPONENTS)
FOREACH(comp ${OrgName_FIND_COMPONENTS})
SET(OrgName_${comp}_FOUND 0)
STRING(FIND ${comp} "-" dashind REVERSE)
STRING(LENGTH ${comp} length)
STRING(SUBSTRING ${comp} 0 ${dashind} name)
MATH(EXPR s "${dashind}+1")
MATH(EXPR l "${length}-${dashind}-1")
STRING(SUBSTRING ${comp} ${s} ${l} version)
SET(OrgName_${name}_INCLUDE_DIR "/usr/local/include/OrgName/${comp}/")
find_library(OrgName_${comp}_LIBRARIES NAMES "${comp}" HINTS "/usr/lib")
IF(OrgName_${comp}_INCLUDE_DIR AND OrgName_${comp}_LIBRARIES)
SET(OrgName_${comp}_FOUND 1)
ENDIF()
IF(NOT OrgName_${comp}_FOUND AND OrgName_FIND_REQUIRED_${comp})
MESSAGE(FATAL_ERROR "OrgName ${comp} not available.")
ENDIF()
SET (OrgName_INCLUDE_DIR ${OrgName_INCLUDE_DIR}
${OrgName_${comp}_INCLUDE_DIR})
SET (OrgName_LIBRARIES ${OrgName_LIBRARIES} ${OrgName_${comp}_LIBRARIES})
ENDFOREACH()
ENDIF()
Now here is the problem, imagine someone didn't enter the version part in
components names. I want to search for the versions which he has installed
(assume the path to library is always the same) and use the last version it can
find, so I have to search for the files which their name contains the library
name (${name}). First of all how can I do this? Second, Am I doing things
right? I mean is there an easier way to do this task?
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