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CMake/Modules/FindQt.cmake

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# searches for the installed Qt-Version and desides which FindQtX.cmake to include
#
# This module uses
# QT_MAX_VERSION ,maximum Qt version set by YOU (e.g. "3.9.9")
# if it is not set, we assume (for compatibility) the project is old and uses Qt < 4
# Qt > 3 projects have to (!) set QT_MAX_VERSION (maximum by Trolltech is "15.7.99")
# QT_MIN_VERSION ,minimum Qt version set by YOU (e.g. "2.2.3")
#
# This modules sets
# QT_INST_MAJOR_VERSION ,major number of the installed Qt (e.g. Qt-Version = 4.2.6 => 4)
# QT_INST_MINOR_VERSION ,minor number of the installed Qt (e.g. Qt-Version = 4.2.6 => 2)
# QT_INST_PATCH_VERSION ,patch number of the installed Qt (e.g. Qt-Version = 4.2.6 => 6)
#
# QT_FOUND ,gets set to YES or NO depending on QT_MAX_VERSION and QT_MIN_VERSION
##########################################
#
# init some internal variables
#
##########################################
IF(NOT QT_FOUND)
SET(QT_FOUND "NO")
ENDIF(NOT QT_FOUND)
# if a project needs Qt it has to call FoundQt.cmake and NOT FoundQt3.cmake, FoundQt4.cmake etc. This gets checked in FoundQt4.cmake etc.
SET(FOUNDQT_CALLED "YES")
# compatibility to CMakeList.txt files for Qt3 projects
IF(NOT QT_MAX_VERSION)
SET(QT_MAX_VERSION "3.9.9")
ENDIF(NOT QT_MAX_VERSION)
IF(NOT QT_MIN_VERSION)
SET(QT_MIN_VERSION "0.0.1")
ENDIF(NOT QT_MIN_VERSION)
#######################################
#
# search for qglobal.h and sets
# QT_GLOBAL_H_FILE
#
#######################################
IF( NOT QT_QGLOBAL_H_FILE)
EXEC_PROGRAM( qmake
ARGS "-query QT_INSTALL_HEADERS"
OUTPUT_VARIABLE qt_headers )
# Qt4-like search paths
FIND_FILE( QT4_QGLOBAL_H_FILE qglobal.h
${qt_headers}/Qt
$ENV{QTDIR}/include/Qt
/usr/local/qt/include/Qt
/usr/local/include/Qt
/usr/lib/qt/include/Qt
/usr/include/Qt
/usr/share/qt4/include/Qt
C:/Progra~1/qt/include/Qt )
IF(QT4_QGLOBAL_H_FILE)
STRING(REGEX REPLACE "/include/Qt/qglobal.h" "" QT_DIR "${QT4_QGLOBAL_H_FILE}")
SET(QT_QGLOBAL_H_FILE ${QT4_QGLOBAL_H_FILE})
ELSE(QT4_QGLOBAL_H_FILE)
#Qt3-like search paths
FIND_FILE( QT3_QGLOBAL_H_FILE qglobal.h
$ENV{QTDIR}/include
/usr/include/qt3/Qt
/usr/local/qt/include
/usr/local/include
/usr/lib/qt/include
/usr/include
/usr/share/qt3/include
C:/Progra~1/qt/include
/usr/include/qt3 )
IF(QT3_QGLOBAL_H_FILE)
STRING(REGEX REPLACE "/include/qglobal.h" "" QT_DIR "${QT3_QGLOBAL_H_FILE}")
SET(QT_QGLOBAL_H_FILE ${QT3_QGLOBAL_H_FILE})
ENDIF(QT3_QGLOBAL_H_FILE)
ENDIF(QT4_QGLOBAL_H_FILE)
#check if qglobal.h is just a file with includes qglobal.h from elsewhere
IF(QT_QGLOBAL_H_FILE)
FILE(READ "${QT_QGLOBAL_H_FILE}" QT_QGLOBAL_H)
#BUG!!! the regexpression is not correct.
#If "#include" and "qglobal.h" are in different lines it would be seen as ok
STRING(REGEX MATCH "#include.*qglobal.h" QT_QGLOBAL_H_LINK "${QT_QGLOBAL_H}")
IF( QT_QGLOBAL_H_LINK )
STRING(REGEX REPLACE ".*\"" "" QT_QGLOBAL_H_LINK "${QT_QGLOBAL_H_LINK}")
STRING(REGEX REPLACE "\\.\\./\\.\\." "${QT_DIR}" QT_QGLOBAL_H_FILE "${QT_QGLOBAL_H_LINK}")
ENDIF(QT_QGLOBAL_H_LINK)
ENDIF(QT_QGLOBAL_H_FILE)
ENDIF(NOT QT_QGLOBAL_H_FILE)
###############################################################
#
# read the version number of the installed of Qt and sets
# QT_INST_MAJOR_VERSION
# QT_INST_MINOR_VERSION
# QT_INST_PATCH_VERSION
#
###############################################################
IF( QT_QGLOBAL_H_FILE)
IF(NOT QT_INST_MAJOR_VERSION OR NOT QT_INST_MINOR_VERSION OR NOT QT_INST_PATCH_VERSION)
#extract the version string from qglobal.h
FILE(READ ${QT_QGLOBAL_H_FILE} QT_QGLOBAL_H)
# BUG !!! ... THE NEXT LINE DOES NOT WORK FOR Qt10 (even though that´s in far future)
# Trolltech defines in src/corelib/global/qglobal.h: QT_VERSION is (major << 16) + (minor << 8) + patch.
STRING(REGEX MATCH "#define[\t ]+QT_VERSION_STR[\t ]+\"([0-9]+.[0-9]+.[0-9]+)" QT_QGLOBAL_H "${QT_QGLOBAL_H}")
STRING(REGEX REPLACE ".*\"([0-9]+.[0-9]+.[0-9]+).*" "\\1" QT_QGLOBAL_H "${QT_QGLOBAL_H}")
# Under windows the qt library (MSVC) has the format qt-mtXYZ where XYZ is the
# version X.Y.Z, so we need to remove the dots from version (at least in Qt3)
STRING(REGEX REPLACE "\\." "" qt_version_str "${QT_QGLOBAL_H}")
IF(NOT QT_INST_MAJOR_VERSION)
STRING(REGEX REPLACE "([0-9]+)[0-9]+[0-9]+" "\\1" QT_INST_MAJOR_VERSION "${qt_version_str}")
ENDIF(NOT QT_INST_MAJOR_VERSION)
IF(NOT QT_INST_MINOR_VERSION)
STRING(REGEX REPLACE "[0-9]+([0-9]+)[0-9]+" "\\1" QT_INST_MINOR_VERSION "${qt_version_str}")
ENDIF(NOT QT_INST_MINOR_VERSION)
IF(NOT QT_INST_PATCH_VERSION)
STRING(REGEX REPLACE "[0-9]+[0-9]+([0-9]+)" "\\1" QT_INST_PATCH_VERSION "${qt_version_str}")
ENDIF(NOT QT_INST_PATCH_VERSION)
ENDIF(NOT QT_INST_MAJOR_VERSION OR NOT QT_INST_MINOR_VERSION OR NOT QT_INST_PATCH_VERSION)
# set qt_version_str back to x.y.z to make message outputs readable
SET(qt_version_str "${QT_INST_MAJOR_VERSION}.${QT_INST_MINOR_VERSION}.${QT_INST_PATCH_VERSION}")
ELSE( QT_QGLOBAL_H_FILE )
IF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
MESSAGE( SEND_ERROR "Couldn´t find qglobal.h => Qt not installed.")
ENDIF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
SET( QT_FOUND "NO" )
ENDIF( QT_QGLOBAL_H_FILE )
IF( NOT Qt_FIND_QUIETLY)
MESSAGE(STATUS "Checking Qt-Version ${QT_INST_MAJOR_VERSION}.${QT_INST_MINOR_VERSION}.${QT_INST_PATCH_VERSION}")
ENDIF( NOT Qt_FIND_QUIETLY)
#############################################################
#
# check the minimum requirments set in QT_MIN_VERSION
#
#############################################################
IF (QT_MIN_VERSION)
#now parse the parts of the user given version string into variables
STRING(REGEX MATCH "^[0-9]+\\.[0-9]+\\.[0-9]+$" min_qt_major_vers "${QT_MIN_VERSION}")
IF (NOT min_qt_major_vers)
IF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
MESSAGE( SEND_ERROR "Invalid Qt version string given: \"${QT_MIN_VERSION}\", expected e.g. \"3.1.5\"")
ENDIF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
SET( QT_FOUND "NO" )
ELSE(NOT min_qt_major_vers)
STRING(REGEX REPLACE "([0-9]+)\\.[0-9]+\\.[0-9]+" "\\1" min_qt_major_vers "${QT_MIN_VERSION}")
STRING(REGEX REPLACE "[0-9]+\\.([0-9])+\\.[0-9]+" "\\1" min_qt_minor_vers "${QT_MIN_VERSION}")
STRING(REGEX REPLACE "[0-9]+\\.[0-9]+\\.([0-9]+)" "\\1" min_qt_patch_vers "${QT_MIN_VERSION}")
# min = "6.5.4", qt = "3.2.1"
# check major number
IF (min_qt_major_vers GREATER QT_INST_MAJOR_VERSION) # (6 > 3) ?
IF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
MESSAGE( SEND_ERROR "Qt major version too small (minimum: ${QT_MIN_VERSION}, found: ${qt_version_str})") # yes
ENDIF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
SET( QT_FOUND "NO" )
ELSE (min_qt_major_vers GREATER QT_INST_MAJOR_VERSION) # no
IF (min_qt_major_vers LESS QT_INST_MAJOR_VERSION) # (6 < 3) ?
SET( QT_VERSION_BIG_ENOUGH "YES" ) # yes
ELSE (min_qt_major_vers LESS QT_INST_MAJOR_VERSION) # ( 6==3) ?
# check minor number
IF (min_qt_minor_vers GREATER QT_INST_MINOR_VERSION) # (5>2) ?
IF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
MESSAGE( SEND_ERROR "Qt minor version too small (minimum: ${QT_MIN_VERSION}, found: ${qt_version_str})") # yes
ENDIF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
SET( QT_FOUND "NO" )
ELSE (min_qt_minor_vers GREATER QT_INST_MINOR_VERSION) # no
IF (min_qt_minor_vers LESS QT_INST_MINOR_VERSION) # (5<2) ?
SET( QT_VERSION_BIG_ENOUGH "YES" ) # yes
ELSE (min_qt_minor_vers LESS QT_INST_MINOR_VERSION) # (5==2)
# check patch number
IF (min_qt_patch_vers GREATER QT_INST_PATCH_VERSION) # (4>1) ?
IF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
MESSAGE( SEND_ERROR "Qt patch level too small (minimum: ${QT_MIN_VERSION}, found: ${qt_version_str})") # yes
ENDIF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
SET( QT_FOUND "NO" )
ELSE (min_qt_patch_vers GREATER QT_INST_PATCH_VERSION) # (4>1) ?
SET( QT_VERSION_BIG_ENOUGH "YES" ) # yes
ENDIF (min_qt_patch_vers GREATER QT_INST_PATCH_VERSION) # (4>1) ?
ENDIF (min_qt_minor_vers LESS QT_INST_MINOR_VERSION)
ENDIF (min_qt_minor_vers GREATER QT_INST_MINOR_VERSION)
ENDIF (min_qt_major_vers LESS QT_INST_MAJOR_VERSION)
ENDIF (min_qt_major_vers GREATER QT_INST_MAJOR_VERSION)
ENDIF (NOT min_qt_major_vers)
ENDIF (QT_MIN_VERSION)
#############################################################
#
# check the maximum requirments set in QT_MAX_VERSION
#
#############################################################
IF(QT_MAX_VERSION)
#now parse the parts of the user given version string into variables
STRING(REGEX MATCH "^[0-9]+\\.[0-9]+\\.[0-9]+$" max_qt_major_vers "${QT_MAX_VERSION}")
IF (NOT max_qt_major_vers)
IF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
MESSAGE( SEND_ERROR "Invalid Qt version string given: \"${QT_MAX_VERSION}\", expected e.g. \"4.1.5\"")
ENDIF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
SET( QT_FOUND "NO" )
ELSE(NOT max_qt_major_vers)
STRING(REGEX REPLACE "([0-9]+)\\.[0-9]+\\.[0-9]+" "\\1" max_qt_major_vers "${QT_MAX_VERSION}")
STRING(REGEX REPLACE "[0-9]+\\.([0-9])+\\.[0-9]+" "\\1" max_qt_minor_vers "${QT_MAX_VERSION}")
STRING(REGEX REPLACE "[0-9]+\\.[0-9]+\\.([0-9]+)" "\\1" max_qt_patch_vers "${QT_MAX_VERSION}")
# max = "6.5.4", qt = "7.2.1"
# check major number
IF (max_qt_major_vers LESS QT_INST_MAJOR_VERSION) # (6 < 3) ?
IF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
MESSAGE( SEND_ERROR "Qt major version too big (maximum: ${QT_MAX_VERSION}, found: ${qt_version_str})") # yes
ENDIF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
SET( QT_FOUND "NO" )
ELSE (max_qt_major_vers LESS QT_INST_MAJOR_VERSION) # no
IF (max_qt_major_vers GREATER QT_INST_MAJOR_VERSION) # (6 < 3) ?
SET( QT_VERSION_SMALL_ENOUGH "YES" ) # yes
ELSE (max_qt_major_vers GREATER QT_INST_MAJOR_VERSION) # ( 6==3) ?
# check minor number
IF (max_qt_minor_vers LESS QT_INST_MINOR_VERSION) # (5 < 2) ?
IF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
MESSAGE( SEND_ERROR "Qt minor version too big (maximum: ${QT_MAX_VERSION}, found: ${qt_version_str})") # yes
ENDIF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
SET( QT_FOUND "NO" )
ELSE (max_qt_minor_vers LESS QT_INST_MINOR_VERSION) # no
IF (max_qt_minor_vers GREATER QT_INST_MINOR_VERSION) # (5 < 2) ?
SET( QT_VERSION_SMALL_ENOUGH "YES" ) # yes
ELSE (max_qt_minor_vers GREATER QT_INST_MINOR_VERSION) # (5==2)
# check patch number
IF (max_qt_patch_vers LESS QT_INST_PATCH_VERSION) # (4 < 1) ?
IF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
MESSAGE( SEND_ERROR "Qt patch level too big (maximum: ${QT_MAX_VERSION}, found: ${qt_version_str})") # yes
ENDIF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
SET( QT_FOUND "NO" )
ELSE (max_qt_patch_vers LESS QT_INST_PATCH_VERSION) # (4 < 1) ?
SET( QT_VERSION_SMALL_ENOUGH "YES" ) # yes
ENDIF (max_qt_patch_vers LESS QT_INST_PATCH_VERSION) # (4 > 1) ?
ENDIF (max_qt_minor_vers GREATER QT_INST_MINOR_VERSION)
ENDIF (max_qt_minor_vers LESS QT_INST_MINOR_VERSION)
ENDIF (max_qt_major_vers GREATER QT_INST_MAJOR_VERSION)
ENDIF (max_qt_major_vers LESS QT_INST_MAJOR_VERSION)
ENDIF (NOT max_qt_major_vers)
ENDIF(QT_MAX_VERSION)
###############################################################
#
# include the correct FindQtX.cmake file if Qt was found
# (we only distinguage between major versions
#
###############################################################
IF(QT_VERSION_SMALL_ENOUGH AND QT_VERSION_BIG_ENOUGH)
# Call package for Qt3
IF( QT_INST_MAJOR_VERSION LESS 4)
FIND_PACKAGE(Qt3)
ENDIF( QT_INST_MAJOR_VERSION LESS 4)
# Call package for Qt4
IF( QT_INST_MAJOR_VERSION GREATER 3 )
IF( QT_INST_MAJOR_VERSION LESS 5)
FIND_PACKAGE(Qt4)
ELSE( QT_INST_MAJOR_VERSION LESS 5)
IF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
MESSAGE(SEND_ERROR "Right now CMake supports only Qt-Versions less than 5.0.0")
ENDIF( NOT Qt_FIND_QUIETLY AND Qt_FIND_REQUIRED)
SET(QT_FOUND "NO")
ENDIF( QT_INST_MAJOR_VERSION LESS 5)
ENDIF( QT_INST_MAJOR_VERSION GREATER 3 )
ENDIF(QT_VERSION_SMALL_ENOUGH AND QT_VERSION_BIG_ENOUGH)
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