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Use config mode if possible when finding packages

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This commit is contained in:
Roland Kaufmann 2013-03-05 22:29:20 +01:00
parent 7104ac7dae
commit e75d69ef1d
1 changed files with 22 additions and 2 deletions
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24
cmake/Modules/OpmFind.cmake
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@ -55,9 +55,30 @@ endforeach (name)
macro (find_and_append_package_to prefix name)
# if we have specified a directory, don't revert to searching the
# system default paths afterwards
string (TOUPPER "${name}" NAME)
string (REPLACE "-" "_" NAME "${NAME}")
# the documentation says that if *-config.cmake files are not found,
# find_package will revert to doing a full search, but that is not
# true, so unconditionally setting ${name}_DIR is not safe. however,
# if the directory given to us contains a config file, then copy the
# value over to this variable to switch to config mode (CMake will
# always use config mode if *_DIR is defined)
if (NOT DEFINED ${name}_DIR AND (DEFINED ${name}_ROOT OR DEFINED ${NAME}_ROOT))
if (EXISTS ${${name}_ROOT}/${name}-config.cmake OR EXISTS ${${name}_ROOT}/${name}Config.cmake)
set (${name}_DIR "${${name}_ROOT}")
endif (EXISTS ${${name}_ROOT}/${name}-config.cmake OR EXISTS ${${name}_ROOT}/${name}Config.cmake)
if (EXISTS ${${NAME}_ROOT}/${name}-config.cmake OR EXISTS ${${NAME}_ROOT}/${name}Config.cmake)
set (${name}_DIR "${${NAME}_ROOT}")
endif (EXISTS ${${NAME}_ROOT}/${name}-config.cmake OR EXISTS ${${NAME}_ROOT}/${name}Config.cmake)
endif (NOT DEFINED ${name}_DIR AND (DEFINED ${name}_ROOT OR DEFINED ${NAME}_ROOT))
# using config mode is better than using module (aka. find) mode
# because then the package has already done all its probes and
# stored them in the config file for us
if (${name}_DIR)
find_package (${name} ${ARGN} PATHS ${${name}_DIR} NO_DEFAULT_PATH)
message (STATUS "Finding package ${name} using config mode")
find_package (${name} ${ARGN} CONFIG PATHS ${${name}_DIR} NO_DEFAULT_PATH)
else (${name}_DIR)
message (STATUS "Finding package ${name} using module mode")
find_package (${name} ${ARGN})
endif (${name}_DIR)
if (${name}_FOUND)
@ -73,7 +94,6 @@ macro (find_and_append_package_to prefix name)
endif (DEFINED ${name}_${var})
endforeach (var)
# some libraries only define xxx_FOUND and not a corresponding HAVE_xxx
string (TOUPPER "${name}" NAME)
if (NOT DEFINED HAVE_${NAME})
set (HAVE_${NAME} 1)
endif (NOT DEFINED HAVE_${NAME})