1set(min_ver 2.7.20090305)
2cmake_minimum_required(VERSION ${min_ver})
3
4if("${CMAKE_VERSION}" VERSION_LESS "${min_ver}")
5  message(FATAL_ERROR
6    "CMAKE_VERSION=[${CMAKE_VERSION}] is less than [${min_ver}]")
7else()
8  message("CMAKE_VERSION=[${CMAKE_VERSION}] is not less than [${min_ver}]")
9endif()
10
11set(EQUALV "1 1")
12list(APPEND EQUALV "1.0 1")
13list(APPEND EQUALV "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0 1")
14list(APPEND EQUALV "1.2.3.4.5.6.7 1.2.3.4.5.6.7")
15list(APPEND EQUALV "1.2.3.4.5.6.7.8.9 1.2.3.4.5.6.7.8.9")
16
17foreach(v IN LISTS EQUALV)
18  string(REGEX MATCH "(.*) (.*)" _dummy "${v}")
19  # modify any of the operands to see the negative check also works
20  if("${CMAKE_MATCH_1}.2" VERSION_EQUAL CMAKE_MATCH_2)
21    message(FATAL_ERROR "${CMAKE_MATCH_1}.2 is equal ${CMAKE_MATCH_2}?")
22  else()
23    message(STATUS "${CMAKE_MATCH_1}.2 is not equal ${CMAKE_MATCH_2}")
24  endif()
25
26  if(CMAKE_MATCH_1 VERSION_EQUAL "${CMAKE_MATCH_2}.2")
27    message(FATAL_ERROR "${CMAKE_MATCH_1} is equal ${CMAKE_MATCH_2}.2?")
28  else()
29    message(STATUS "${CMAKE_MATCH_1} is not equal ${CMAKE_MATCH_2}.2")
30  endif()
31endforeach()
32
33# test the negative outcomes first, due to the implementation the positive
34# allow some additional strings to pass that would not fail for the negative
35# tests
36
37list(APPEND EQUALV "1a 1")
38list(APPEND EQUALV "1.1a 1.1")
39list(APPEND EQUALV "1.0a 1")
40list(APPEND EQUALV "1a 1.0")
41
42foreach(v IN LISTS EQUALV)
43  # check equal versions
44  string(REGEX MATCH "(.*) (.*)" _dummy "${v}")
45  if(CMAKE_MATCH_1 VERSION_EQUAL CMAKE_MATCH_2)
46    message(STATUS "${CMAKE_MATCH_1} is equal ${CMAKE_MATCH_2}")
47  else()
48    message(FATAL_ERROR "${CMAKE_MATCH_1} is not equal ${CMAKE_MATCH_2}?")
49  endif()
50
51  # still equal, but inverted order of operands
52  string(REGEX MATCH "(.*) (.*)" _dummy "${v}")
53  if(CMAKE_MATCH_2 VERSION_EQUAL CMAKE_MATCH_1)
54    message(STATUS "${CMAKE_MATCH_2} is equal ${CMAKE_MATCH_1}")
55  else()
56    message(FATAL_ERROR "${CMAKE_MATCH_2} is not equal ${CMAKE_MATCH_1}?")
57  endif()
58endforeach()
59
60set(LESSV "1.2.3.4.5.6.7.8 1.2.3.4.5.6.7.9")
61list(APPEND LESSV "1.2.3.4.5.6.7 1.2.3.4.5.6.7.9")
62list(APPEND LESSV "1 1.0.0.1")
63foreach(v IN LISTS LESSV)
64  string(REGEX MATCH "(.*) (.*)" _dummy "${v}")
65  # check less
66  if(CMAKE_MATCH_1 VERSION_LESS CMAKE_MATCH_2)
67    message(STATUS "${CMAKE_MATCH_1} is less than ${CMAKE_MATCH_2}")
68  else()
69    message(FATAL_ERROR "${CMAKE_MATCH_1} is not less than ${CMAKE_MATCH_2}?")
70  endif()
71
72  # check greater
73  if(CMAKE_MATCH_2 VERSION_GREATER CMAKE_MATCH_1)
74    message(STATUS "${CMAKE_MATCH_2} is greater than ${CMAKE_MATCH_1}")
75  else()
76    message(FATAL_ERROR "${CMAKE_MATCH_2} is not greater than ${CMAKE_MATCH_1}?")
77  endif()
78
79  # check less negative case
80  if(NOT CMAKE_MATCH_2 VERSION_LESS CMAKE_MATCH_1)
81    message(STATUS "${CMAKE_MATCH_2} is not less than ${CMAKE_MATCH_1}")
82  else()
83    message(FATAL_ERROR "${CMAKE_MATCH_2} is less than ${CMAKE_MATCH_1}?")
84  endif()
85
86  # check greater or equal (same as less negative)
87  if(CMAKE_MATCH_2 VERSION_GREATER_EQUAL CMAKE_MATCH_1)
88    message(STATUS "${CMAKE_MATCH_2} is not less than ${CMAKE_MATCH_1}")
89  else()
90    message(FATAL_ERROR "${CMAKE_MATCH_2} is less than ${CMAKE_MATCH_1}?")
91  endif()
92
93  # check greater negative case
94  if(NOT CMAKE_MATCH_1 VERSION_GREATER CMAKE_MATCH_2)
95    message(STATUS "${CMAKE_MATCH_1} is not greater than ${CMAKE_MATCH_2}")
96  else()
97    message(FATAL_ERROR "${CMAKE_MATCH_1} is greater than ${CMAKE_MATCH_2}?")
98  endif()
99
100  # check less or equal (same as greater negative) case
101  if(CMAKE_MATCH_1 VERSION_LESS_EQUAL CMAKE_MATCH_2)
102    message(STATUS "${CMAKE_MATCH_1} is not greater than ${CMAKE_MATCH_2}")
103  else()
104    message(FATAL_ERROR "${CMAKE_MATCH_1} is greater than ${CMAKE_MATCH_2}?")
105  endif()
106endforeach()
107