new cmake macro OptionalFindPackage.cmake featuring the new command optional_find_package(<name>)

e.g.

optional_find_package( ZLIB)

is the same as

option(WITH_ZLIB "Search for ZLIB package" ON)
if (WITH_ZLIB)
   find_package(ZLIB)
endif (WITH_ZLIB)

This has the effect that all packages which are searched using this new command can be manually disabled
using "cmake <dir> -DWITH_<name>=OFF" (or using the cmake GUI)
This can be used to disable a package although it exists on the system.
The result <name>_FOUND can be used as usual with find_package() for further testing in the CMakeLists.txt

Alex

CCMAIL: kde-buildsystem@kde.org


svn path=/trunk/KDE/kdelibs/; revision=504336

The following changes were in SVN, but were removed from git:

M	pics/CMakeLists.txt

1 files changed, 16 insertions, 0 deletions

diff --git a/modules/OptionalFindPackage.cmake b/modules/OptionalFindPackage.cmake
new file mode 100644
index 00000000..2642a993
--- /dev/null
+++ b/modules/OptionalFindPackage.cmake
@@ -0,0 +1,16 @@
+# - OPTIONAL_FIND_PACKAGE() combines FIND_PACKAGE() with an OPTION()
+# OPTIONAL_FIND_PACKAGE( <name> [QUIT] )
+# This macro is a combination of OPTION() and FIND_PACKAGE(), it
+# works like FIND_PACKAGE(), but additionally it automatically creates
+# an option name WITH_<name>, which can be disabled via the cmake GUI.
+# or via -DWITH_<name>=OFF
+# The standard <name>_FOUND variables can be used in the same way
+# as when using the normal FIND_PACKAGE()
+
+MACRO(OPTIONAL_FIND_PACKAGE _name )
+   OPTION(WITH_${_name} "Search for ${_name} package" ON)
+   IF (WITH_${_name})
+      FIND_PACKAGE(${_name} ${ARGN})
+   ENDIF (WITH_${_name})
+ENDMACRO(OPTIONAL_FIND_PACKAGE)
+