diff options
| -rw-r--r-- | Modules/FindZLIB.cmake | 46 |
1 files changed, 39 insertions, 7 deletions
diff --git a/Modules/FindZLIB.cmake b/Modules/FindZLIB.cmake index 7432257..fa991f1 100644 --- a/Modules/FindZLIB.cmake +++ b/Modules/FindZLIB.cmake @@ -1,12 +1,20 @@ # - Find zlib -# Find the native ZLIB includes and library +# Find the native ZLIB includes and library. +# Once done this will define # # ZLIB_INCLUDE_DIRS - where to find zlib.h, etc. # ZLIB_LIBRARIES - List of libraries when using zlib. # ZLIB_FOUND - True if zlib found. # # ZLIB_VERSION_STRING - The version of zlib found (x.y.z) -# ZLIB_MAJOR_VERSION - the major version of zlib +# ZLIB_VERSION_MAJOR - The major version of zlib +# ZLIB_VERSION_MINOR - The minor version of zlib +# ZLIB_VERSION_PATCH - The patch version of zlib +# ZLIB_VERSION_TWEAK - The tweak version of zlib +# +# The following variable are provided for backward compatibility +# +# ZLIB_MAJOR_VERSION - The major version of zlib # ZLIB_MINOR_VERSION - The minor version of zlib # ZLIB_PATCH_VERSION - The patch version of zlib @@ -36,9 +44,19 @@ FIND_LIBRARY(ZLIB_LIBRARY ) MARK_AS_ADVANCED(ZLIB_LIBRARY ZLIB_INCLUDE_DIR) -IF (ZLIB_INCLUDE_DIR AND EXISTS "${ZLIB_INCLUDE_DIR}/zlib.h") - FILE(READ "${ZLIB_INCLUDE_DIR}/zlib.h" ZLIB_H) - STRING(REGEX REPLACE ".*#define ZLIB_VERSION \"([0-9]+)\\.([0-9]+)\\.([0-9]+).*" "\\1.\\2.\\3" ZLIB_VERSION_STRING "${ZLIB_H}") +IF(ZLIB_INCLUDE_DIR AND EXISTS "${ZLIB_INCLUDE_DIR}/zlib.h") + FILE(STRINGS "${ZLIB_INCLUDE_DIR}/zlib.h" ZLIB_H REGEX "^#define ZLIB_VERSION \"[^\"]*\"$") + + STRING(REGEX REPLACE "^.*ZLIB_VERSION \"([0-9]+).*$" "\\1" ZLIB_VERSION_MAJOR "${ZLIB_H}") + STRING(REGEX REPLACE "^.*ZLIB_VERSION \"[0-9]+\\.([0-9]+).*$" "\\1" ZLIB_VERSION_MINOR "${ZLIB_H}") + STRING(REGEX REPLACE "^.*ZLIB_VERSION \"[0-9]+\\.[0-9]+\\.([0-9]+).*$" "\\1" ZLIB_VERSION_PATCH "${ZLIB_H}") + STRING(REGEX REPLACE "^.*ZLIB_VERSION \"[0-9]+\\.[0-9]+\\.[0-9]+\\.([0-9]+).*$" "\\1" ZLIB_VERSION_TWEAK "${ZLIB_H}") + + SET(ZLIB_VERSION_STRING "${ZLIB_VERSION_MAJOR}.${ZLIB_VERSION_MINOR}.${ZLIB_VERSION_PATCH}.${ZLIB_VERSION_TWEAK}") + + SET(ZLIB_MAJOR_VERSION "${ZLIB_VERSION_MAJOR}") + SET(ZLIB_MINOR_VERSION "${ZLIB_VERSION_MINOR}") + SET(ZLIB_PATCH_VERSION "${ZLIB_VERSION_PATCH}") ENDIF() # handle the QUIETLY and REQUIRED arguments and set ZLIB_FOUND to TRUE if @@ -46,8 +64,22 @@ ENDIF() INCLUDE(FindPackageHandleStandardArgs) FIND_PACKAGE_HANDLE_STANDARD_ARGS(ZLIB DEFAULT_MSG ZLIB_INCLUDE_DIR ZLIB_LIBRARY) -IF (ZLIB_FOUND) +# handle the VERSION provided in find_package() command +if(ZLIB_FIND_VERSION) + if(ZLIB_FIND_VERSION_EXACT AND NOT ${ZLIB_VERSION_STRING} VERSION_EQUAL ${ZLIB_FIND_VERSION}) + message(FATAL_ERROR "ZLIB version found (${ZLIB_VERSION_STRING}) does not match the required one (${ZLIB_FIND_VERSION}), aborting.") + elseif(${ZLIB_VERSION_STRING} VERSION_LESS ${ZLIB_FIND_VERSION}) + if(ZLIB_FIND_REQUIRED) + message(FATAL_ERROR "ZLIB version found (${ZLIB_VERSION_STRING}) is less then the minimum required (${ZLIB_FIND_VERSION}), aborting.") + else(ZLIB_FIND_REQUIRED) + message("ZLIB version found (${ZLIB_VERSION_STRING}) is less then the minimum required (${ZLIB_FIND_VERSION}), continue without ZLIB support.") + set(ZLIB_FOUND FALSE) + endif(ZLIB_FIND_REQUIRED) + endif() +endif(ZLIB_FIND_VERSION) + +IF(ZLIB_FOUND) SET(ZLIB_INCLUDE_DIRS ${ZLIB_INCLUDE_DIR}) - SET(ZLIB_LIBRARIES ${ZLIB_LIBRARY}) + SET(ZLIB_LIBRARIES ${ZLIB_LIBRARY}) ENDIF() |