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Kitware
GitHub Repository: Kitware/CMake
 Path: blob/master/Tests/CMakeOnly/MajorVersionSelection/CMakeLists.txt
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cmake_minimum_required(VERSION 3.10)

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if (NOT MAJOR_TEST_MODULE OR NOT MAJOR_TEST_VERSION)

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  message(FATAL_ERROR "test selection variables not set up")

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endif ()

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if (MAJOR_TEST_NO_LANGUAGES)

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  project(major_detect_${MAJOR_TEST_MODULE}_${MAJOR_TEST_VERSION} NONE)

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else ()

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  project(major_detect_${MAJOR_TEST_MODULE}_${MAJOR_TEST_VERSION})

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endif ()

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find_package(${MAJOR_TEST_MODULE} ${MAJOR_TEST_VERSION})

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if (MAJOR_TEST_VERSION_VAR)

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  set(VERSION_VAR "${MAJOR_TEST_VERSION_VAR}")

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else ()

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  set(VERSION_VAR "${MAJOR_TEST_MODULE}_VERSION_STRING")

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endif ()

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string(TOUPPER "${MAJOR_TEST_MODULE}" MODULE_UPPER)

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if ( ( ${MAJOR_TEST_MODULE}_FOUND OR ${MODULE_UPPER}_FOUND ) AND ${VERSION_VAR})

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  message(STATUS "${VERSION_VAR} is '${${VERSION_VAR}}'")

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  if (${VERSION_VAR} VERSION_LESS MAJOR_TEST_VERSION)

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    message(SEND_ERROR "Found version ${${VERSION_VAR}} is less than requested major version ${MAJOR_TEST_VERSION}")

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  endif ()

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  math(EXPR V_PLUS_ONE "${MAJOR_TEST_VERSION} + 1")

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  if (${VERSION_VAR} VERSION_GREATER V_PLUS_ONE)

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    message(SEND_ERROR "Found version ${${VERSION_VAR}} is greater than requested major version ${MAJOR_TEST_VERSION}")

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  endif ()

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endif ()

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if ( ( ${MAJOR_TEST_MODULE}_FOUND OR ${MODULE_UPPER}_FOUND ) AND ${MAJOR_TEST_MODULE}_VERSION_MAJOR)

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  message(STATUS "${MAJOR_TEST_MODULE}_VERSION_MAJOR is '${${MAJOR_TEST_MODULE}_VERSION_MAJOR}'")

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  if (NOT ${MAJOR_TEST_VERSION} EQUAL ${MAJOR_TEST_MODULE}_VERSION_MAJOR)

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    message(SEND_ERROR "We requested major version ${MAJOR_TEST_VERSION} but ${MAJOR_TEST_MODULE} set ${MAJOR_TEST_MODULE}_VERSION_MAJOR to ${${MAJOR_TEST_MODULE}_VERSION_MAJOR}")

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  endif ()

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endif ()

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if ( ( ${MAJOR_TEST_MODULE}_FOUND OR ${MODULE_UPPER}_FOUND ) AND ${MODULE_UPPER}_VERSION_MAJOR)

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  message(STATUS "${MODULE_UPPER}_VERSION_MAJOR is '${${MODULE_UPPER}_VERSION_MAJOR}'")

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  if (NOT ${MAJOR_TEST_VERSION} EQUAL ${MODULE_UPPER}_VERSION_MAJOR)

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    message(SEND_ERROR "We requested major version ${MAJOR_TEST_VERSION} but ${MAJOR_TEST_MODULE} set ${MODULE_UPPER}_VERSION_MAJOR to ${${MODULE_UPPER}_VERSION_MAJOR}")

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  endif ()

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endif ()

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