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write_basic_package_version_file: add ExactVersion mode 

This mode is for packages which consider themselves only compatible if
exactly the same version is requested. The tweak version is ignored.

Alex
This commit is contained in:
Alex Neundorf 2012-03-10 16:05:19 +01:00
parent 1c69cd8feb
commit 5d18223917
2 changed files with 47 additions and 1 deletions
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42
Modules/BasicConfigVersion-ExactVersion.cmake.in Normal file
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@ -0,0 +1,42 @@
# This is a basic version file for the Config-mode of find_package().
# It is used by write_basic_package_version_file() as input file for configure_file()
# to create a version-file which can be installed along a config.cmake file.
#
# The created file 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 equal to the requested version.
# The tweak version component is ignored.
# The variable CVF_VERSION must be set before calling configure_file().
set(PACKAGE_VERSION "@CVF_VERSION@")
if("@CVF_VERSION@" MATCHES "^([0-9]+\\.[0-9]+\\.[0-9]+)\\..*") # strip the tweak version
set(CVF_VERSION_NO_TWEAK "${CMAKE_MATCH_1}")
else()
set(CVF_VERSION_NO_TWEAK "@CVF_VERSION@")
endif()
if("${PACKAGE_FIND_VERSION}" MATCHES "^([0-9]+\\.[0-9]+\\.[0-9]+)\\..*") # strip the tweak version
set(REQUESTED_VERSION_NO_TWEAK "${CMAKE_MATCH_1}")
else()
set(REQUESTED_VERSION_NO_TWEAK "${PACKAGE_FIND_VERSION}")
endif()
if("${REQUESTED_VERSION_NO_TWEAK}" STREQUAL "${CVF_VERSION_NO_TWEAK}")
set(PACKAGE_VERSION_COMPATIBLE TRUE)
else()
set(PACKAGE_VERSION_COMPATIBLE FALSE)
endif()
if( "${PACKAGE_FIND_VERSION}" STREQUAL "${PACKAGE_VERSION}")
set(PACKAGE_VERSION_EXACT TRUE)
endif()
# check that the installed version has the same 32/64bit-ness as the one which is currently searching:
if(NOT "${CMAKE_SIZEOF_VOID_P}" STREQUAL "@CMAKE_SIZEOF_VOID_P@")
math(EXPR installedBits "@CMAKE_SIZEOF_VOID_P@ * 8")
set(PACKAGE_VERSION "${PACKAGE_VERSION} (${installedBits}bit)")
set(PACKAGE_VERSION_UNSUITABLE TRUE)
endif()

6
Modules/CMakePackageConfigHelpers.cmake
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@ -61,7 +61,7 @@
# For an example see below the documentation for WRITE_BASIC_PACKAGE_VERSION_FILE().
#
#
# WRITE_BASIC_PACKAGE_VERSION_FILE( filename VERSION major.minor.patch COMPATIBILITY (AnyNewerVersion|SameMajorVersion) )
# WRITE_BASIC_PACKAGE_VERSION_FILE( filename VERSION major.minor.patch COMPATIBILITY (AnyNewerVersion|SameMajorVersion|ExactVersion) )
#
# Writes a file for use as <package>ConfigVersion.cmake file to <filename>.
# See the documentation of FIND_PACKAGE() for details on this.
@ -76,6 +76,10 @@
# not be considered compatible if 1.0 is requested.
# This mode should be used for packages which guarantee backward compatibility within the
# same major version.
# If ExactVersion is used, then the package is only considered compatible if the requested
# version matches exactly its own version number (not considering the tweak version).
# For example, version 1.2.3 of a package is only considered compatible to requested version 1.2.3.
# This mode is for packages without compatibility guarantees.
# If your project has more elaborated version matching rules, you will need to write your
# own custom ConfigVersion.cmake file instead of using this macro.
#