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MacroVersionCmp.cmake
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MacroVersionCmp.cmake
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# - Compare versions
# MACRO_VERSION_CMP(version1 version2 result)
#
# result < 0 if version1 < version2
# result == 0 if version1 == version2
# result > 0 if version1 > version2
#
MACRO(MACRO_VERSION_CMP _version1 _version2 _result)
IF (NOT _version1)
SET(_version1 0)
ENDIF (NOT _version1)
IF (NOT _version2)
SET(_version2 0)
ENDIF (NOT _version2)
STRING(REGEX MATCHALL "[0-9]+" _version1_parts "${_version1}")
STRING(REGEX MATCHALL "[0-9]+" _version2_parts "${_version2}")
LIST(LENGTH _version1_parts _version1_count)
LIST(LENGTH _version2_parts _version2_count)
IF (_version1_count LESS ${_version2_count})
SET(_version_count ${_version1_count})
SET(${_result} -1)
ELSEIF (_version1_count GREATER ${_version2_count})
SET(_version_count ${_version2_count})
SET(${_result} 1)
ELSE (_version1_count LESS ${_version2_count})
SET(_version_count ${_version1_count})
SET(${_result} 0)
ENDIF (_version1_count LESS ${_version2_count})
MATH(EXPR _version_count "${_version_count} - 1")
IF (NOT _version_count LESS 0)
FOREACH(i RANGE 0 ${_version_count})
LIST(GET _version1_parts ${i} _v1)
LIST(GET _version2_parts ${i} _v2)
IF (NOT _v1)
SET(_v1 0)
ENDIF (NOT _v1)
IF (NOT _v2)
SET(_v2 0)
ENDIF (NOT _v2)
IF (_v1 LESS ${_v2})
SET(${_result} -1)
BREAK()
ELSEIF (_v1 GREATER ${_v2})
SET(${_result} 1)
BREAK()
ENDIF (_v1 LESS ${_v2})
ENDFOREACH(i)
ENDIF (NOT _version_count LESS 0)
ENDMACRO(MACRO_VERSION_CMP)