install-cmake-files: Add macros for building version files, and for installation of config files

4 files changed, 71 insertions, 0 deletions

diff --git a/cmake/modules/BasicFindPackageVersion.cmake.in b/cmake/modules/BasicFindPackageVersion.cmake.in
new file mode 100644
index 00000000..2be6d9ec
--- /dev/null
+++ b/cmake/modules/BasicFindPackageVersion.cmake.in
@@ -0,0 +1,30 @@
+# This is a very basic file for the new style find_package() search mode,
+# i.e. Config-mode. It is used by MACRO_WRITE_BASIC_CMAKE_VERSION_FILE() from
+# MacroWriteBasicCMakeVersionFile.cmake.
+# In this mode find_package() searches for a <package>Config.cmake
+# file and an associated <package>Version.cmake file, which it loads to check
+# the version number.
+# This file can be used with configure_file() to generate such a file for a project
+# with very basic logic.
+# It sets PACKAGE_VERSION_EXACT if the current version string and the requested
+# version string are exactly the same and it sets PACKAGE_VERSION_COMPATIBLE
+# if the current version is >= requested version.
+# If this is not good enough for your project, you need to write your own
+# improved <package>Version.cmake file.
+# This file requires the following three variables to be set:
+#   PROJECT_VERSION_MAJOR
+#   PROJECT_VERSION_MINOR
+#   PROJECT_VERSION_PATCH
+
+
+set(PACKAGE_VERSION @PROJECT_VERSION_FULL@)
+
+if("${PACKAGE_VERSION}" VERSION_LESS "${PACKAGE_FIND_VERSION}" )
+   set(PACKAGE_VERSION_COMPATIBLE FALSE)
+else("${PACKAGE_VERSION}" VERSION_LESS "${PACKAGE_FIND_VERSION}" )
+   set(PACKAGE_VERSION_COMPATIBLE TRUE)
+   if( "${PACKAGE_FIND_VERSION}" STREQUAL "${PACKAGE_VERSION}")
+      set(PACKAGE_VERSION_EXACT TRUE)
+   endif( "${PACKAGE_FIND_VERSION}" STREQUAL "${PACKAGE_VERSION}")
+endif("${PACKAGE_VERSION}" VERSION_LESS "${PACKAGE_FIND_VERSION}" )
+
diff --git a/cmake/modules/MacroWriteBasicCMakeVersionFile.cmake b/cmake/modules/MacroWriteBasicCMakeVersionFile.cmake
new file mode 100644
index 00000000..d23d857b
--- /dev/null
+++ b/cmake/modules/MacroWriteBasicCMakeVersionFile.cmake
@@ -0,0 +1,21 @@
+#  MACRO_WRITE_BASIC_CMAKE_VERSION_FILE( _filename _major _minor _patch)
+#    Writes a file for use as <package>ConfigVersion.cmake file to <_filename>.
+#    See the documentation of FIND_PACKAGE() for details on this.
+#    _filename is the output filename, it should be in the build tree.
+#    _major is the major version number of the project to be installed
+#    _minor is the minor version number of the project to be installed
+#    _patch is the patch version number of the project to be installed
+#
+
+# Copyright (c) 2008, Alexander Neundorf, <neundorf@kde.org>
+# Copyright (c) 2010, Collabora Ltd., <http://www.collabora.co.uk/>
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+get_filename_component(_currentListFileDir ${CMAKE_CURRENT_LIST_FILE} PATH)
+
+function(MACRO_WRITE_BASIC_CMAKE_VERSION_FILE _filename _version)
+   set(PROJECT_VERSION_FULL ${_version})
+   configure_file(${_currentListFileDir}/BasicFindPackageVersion.cmake.in "${_filename}" @ONLY)
+endfunction(MACRO_WRITE_BASIC_CMAKE_VERSION_FILE _major _minor _patch)
diff --git a/cmake/modules/TelepathyDefaults.cmake b/cmake/modules/TelepathyDefaults.cmake
index 7796cc08..a7bf77a5 100644
--- a/cmake/modules/TelepathyDefaults.cmake
+++ b/cmake/modules/TelepathyDefaults.cmake
@@ -13,6 +13,11 @@ set(CMAKE_INCLUDE_DIRECTORIES_PROJECT_BEFORE ON)
 # Use colored output
 set(CMAKE_COLOR_MAKEFILE ON)
 
+# Add an option to decide where to install the config files
+if (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}.${CMAKE_PATCH_VERSION} VERSION_GREATER 2.6.2)
+    option(USE_COMMON_CMAKE_PACKAGE_CONFIG_DIR "Prefer to install the <package>Config.cmake files to lib/cmake/<package> instead of lib/<package>/cmake" TRUE)
+endif (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}.${CMAKE_PATCH_VERSION} VERSION_GREATER 2.6.2)
+
 # Set compiler flags
 if(CMAKE_COMPILER_IS_GNUCXX)
     set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -ggdb")
diff --git a/cmake/modules/TpQtMacros.cmake b/cmake/modules/TpQtMacros.cmake
index e77a5435..a3a89428 100644
--- a/cmake/modules/TpQtMacros.cmake
+++ b/cmake/modules/TpQtMacros.cmake
@@ -104,6 +104,13 @@
 #          This function MUST be called before calling TPQT_ADD_DBUS_UNIT_TEST. It takes care of preparing the test
 #          environment for DBus tests and generating the needed files.
 #
+# macro MAKE_INSTALL_PATH_ABSOLUTE (out in)
+#       This macro makes the path given in the "in" variable absolute (or leaves it unchanged
+#       if it's absolute already) by prefixing it with TELEPATHY_QT_INSTALL_DIR,
+#       and returns the absolute path in the "out" variable. This macro is mainly used for
+#       generating *Config.cmake files.
+#
+#
 
 MACRO (TPQT_EXTRACT_DEPENDS _tpqt_other _tpqt_depends)
   SET(${_tpqt_other})
@@ -433,3 +440,11 @@ sh ${CMAKE_SOURCE_DIR}/tools/with-session-bus.sh \\
     --config-file=${CMAKE_BINARY_DIR}/tests/dbus-1/session.conf -- $@
 ")
 endfunction(tpqt_setup_dbus_test_environment)
+
+macro(make_install_path_absolute out in)
+    if (IS_ABSOLUTE "${in}")
+        set(${out} "${in}")
+    else (IS_ABSOLUTE "${in}")
+        set(${out} "\${TELEPATHY_QT${QT_VERSION_MAJOR}_INSTALL_DIR}/${in}")
+    endif (IS_ABSOLUTE "${in}")
+endmacro(make_install_path_absolute out in)