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1 | # =========================================================================== | ||
2 | # https://www.gnu.org/software/autoconf-archive/ax_compare_version.html | ||
3 | # =========================================================================== | ||
4 | # | ||
5 | # SYNOPSIS | ||
6 | # | ||
7 | # AX_COMPARE_VERSION(VERSION_A, OP, VERSION_B, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) | ||
8 | # | ||
9 | # DESCRIPTION | ||
10 | # | ||
11 | # This macro compares two version strings. Due to the various number of | ||
12 | # minor-version numbers that can exist, and the fact that string | ||
13 | # comparisons are not compatible with numeric comparisons, this is not | ||
14 | # necessarily trivial to do in a autoconf script. This macro makes doing | ||
15 | # these comparisons easy. | ||
16 | # | ||
17 | # The six basic comparisons are available, as well as checking equality | ||
18 | # limited to a certain number of minor-version levels. | ||
19 | # | ||
20 | # The operator OP determines what type of comparison to do, and can be one | ||
21 | # of: | ||
22 | # | ||
23 | # eq - equal (test A == B) | ||
24 | # ne - not equal (test A != B) | ||
25 | # le - less than or equal (test A <= B) | ||
26 | # ge - greater than or equal (test A >= B) | ||
27 | # lt - less than (test A < B) | ||
28 | # gt - greater than (test A > B) | ||
29 | # | ||
30 | # Additionally, the eq and ne operator can have a number after it to limit | ||
31 | # the test to that number of minor versions. | ||
32 | # | ||
33 | # eq0 - equal up to the length of the shorter version | ||
34 | # ne0 - not equal up to the length of the shorter version | ||
35 | # eqN - equal up to N sub-version levels | ||
36 | # neN - not equal up to N sub-version levels | ||
37 | # | ||
38 | # When the condition is true, shell commands ACTION-IF-TRUE are run, | ||
39 | # otherwise shell commands ACTION-IF-FALSE are run. The environment | ||
40 | # variable 'ax_compare_version' is always set to either 'true' or 'false' | ||
41 | # as well. | ||
42 | # | ||
43 | # Examples: | ||
44 | # | ||
45 | # AX_COMPARE_VERSION([3.15.7],[lt],[3.15.8]) | ||
46 | # AX_COMPARE_VERSION([3.15],[lt],[3.15.8]) | ||
47 | # | ||
48 | # would both be true. | ||
49 | # | ||
50 | # AX_COMPARE_VERSION([3.15.7],[eq],[3.15.8]) | ||
51 | # AX_COMPARE_VERSION([3.15],[gt],[3.15.8]) | ||
52 | # | ||
53 | # would both be false. | ||
54 | # | ||
55 | # AX_COMPARE_VERSION([3.15.7],[eq2],[3.15.8]) | ||
56 | # | ||
57 | # would be true because it is only comparing two minor versions. | ||
58 | # | ||
59 | # AX_COMPARE_VERSION([3.15.7],[eq0],[3.15]) | ||
60 | # | ||
61 | # would be true because it is only comparing the lesser number of minor | ||
62 | # versions of the two values. | ||
63 | # | ||
64 | # Note: The characters that separate the version numbers do not matter. An | ||
65 | # empty string is the same as version 0. OP is evaluated by autoconf, not | ||
66 | # configure, so must be a string, not a variable. | ||
67 | # | ||
68 | # The author would like to acknowledge Guido Draheim whose advice about | ||
69 | # the m4_case and m4_ifvaln functions make this macro only include the | ||
70 | # portions necessary to perform the specific comparison specified by the | ||
71 | # OP argument in the final configure script. | ||
72 | # | ||
73 | # LICENSE | ||
74 | # | ||
75 | # Copyright (c) 2008 Tim Toolan <toolan@ele.uri.edu> | ||
76 | # | ||
77 | # Copying and distribution of this file, with or without modification, are | ||
78 | # permitted in any medium without royalty provided the copyright notice | ||
79 | # and this notice are preserved. This file is offered as-is, without any | ||
80 | # warranty. | ||
81 | |||
82 | #serial 13 | ||
83 | |||
84 | dnl ######################################################################### | ||
85 | AC_DEFUN([AX_COMPARE_VERSION], [ | ||
86 | AC_REQUIRE([AC_PROG_AWK]) | ||
87 | |||
88 | # Used to indicate true or false condition | ||
89 | ax_compare_version=false | ||
90 | |||
91 | # Convert the two version strings to be compared into a format that | ||
92 | # allows a simple string comparison. The end result is that a version | ||
93 | # string of the form 1.12.5-r617 will be converted to the form | ||
94 | # 0001001200050617. In other words, each number is zero padded to four | ||
95 | # digits, and non digits are removed. | ||
96 | AS_VAR_PUSHDEF([A],[ax_compare_version_A]) | ||
97 | A=`echo "$1" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \ | ||
98 | -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \ | ||
99 | -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \ | ||
100 | -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \ | ||
101 | -e 's/[[^0-9]]//g'` | ||
102 | |||
103 | AS_VAR_PUSHDEF([B],[ax_compare_version_B]) | ||
104 | B=`echo "$3" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \ | ||
105 | -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \ | ||
106 | -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \ | ||
107 | -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \ | ||
108 | -e 's/[[^0-9]]//g'` | ||
109 | |||
110 | dnl # In the case of le, ge, lt, and gt, the strings are sorted as necessary | ||
111 | dnl # then the first line is used to determine if the condition is true. | ||
112 | dnl # The sed right after the echo is to remove any indented white space. | ||
113 | m4_case(m4_tolower($2), | ||
114 | [lt],[ | ||
115 | ax_compare_version=`echo "x$A | ||
116 | x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/false/;s/x${B}/true/;1q"` | ||
117 | ], | ||
118 | [gt],[ | ||
119 | ax_compare_version=`echo "x$A | ||
120 | x$B" | sed 's/^ *//' | sort | sed "s/x${A}/false/;s/x${B}/true/;1q"` | ||
121 | ], | ||
122 | [le],[ | ||
123 | ax_compare_version=`echo "x$A | ||
124 | x$B" | sed 's/^ *//' | sort | sed "s/x${A}/true/;s/x${B}/false/;1q"` | ||
125 | ], | ||
126 | [ge],[ | ||
127 | ax_compare_version=`echo "x$A | ||
128 | x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/true/;s/x${B}/false/;1q"` | ||
129 | ],[ | ||
130 | dnl Split the operator from the subversion count if present. | ||
131 | m4_bmatch(m4_substr($2,2), | ||
132 | [0],[ | ||
133 | # A count of zero means use the length of the shorter version. | ||
134 | # Determine the number of characters in A and B. | ||
135 | ax_compare_version_len_A=`echo "$A" | $AWK '{print(length)}'` | ||
136 | ax_compare_version_len_B=`echo "$B" | $AWK '{print(length)}'` | ||
137 | |||
138 | # Set A to no more than B's length and B to no more than A's length. | ||
139 | A=`echo "$A" | sed "s/\(.\{$ax_compare_version_len_B\}\).*/\1/"` | ||
140 | B=`echo "$B" | sed "s/\(.\{$ax_compare_version_len_A\}\).*/\1/"` | ||
141 | ], | ||
142 | [[0-9]+],[ | ||
143 | # A count greater than zero means use only that many subversions | ||
144 | A=`echo "$A" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"` | ||
145 | B=`echo "$B" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"` | ||
146 | ], | ||
147 | [.+],[ | ||
148 | AC_WARNING( | ||
149 | [invalid OP numeric parameter: $2]) | ||
150 | ],[]) | ||
151 | |||
152 | # Pad zeros at end of numbers to make same length. | ||
153 | ax_compare_version_tmp_A="$A`echo $B | sed 's/./0/g'`" | ||
154 | B="$B`echo $A | sed 's/./0/g'`" | ||
155 | A="$ax_compare_version_tmp_A" | ||
156 | |||
157 | # Check for equality or inequality as necessary. | ||
158 | m4_case(m4_tolower(m4_substr($2,0,2)), | ||
159 | [eq],[ | ||
160 | test "x$A" = "x$B" && ax_compare_version=true | ||
161 | ], | ||
162 | [ne],[ | ||
163 | test "x$A" != "x$B" && ax_compare_version=true | ||
164 | ],[ | ||
165 | AC_WARNING([invalid OP parameter: $2]) | ||
166 | ]) | ||
167 | ]) | ||
168 | |||
169 | AS_VAR_POPDEF([A])dnl | ||
170 | AS_VAR_POPDEF([B])dnl | ||
171 | |||
172 | dnl # Execute ACTION-IF-TRUE / ACTION-IF-FALSE. | ||
173 | if test "$ax_compare_version" = "true" ; then | ||
174 | m4_ifvaln([$4],[$4],[:])dnl | ||
175 | m4_ifvaln([$5],[else $5])dnl | ||
176 | fi | ||
177 | ]) dnl AX_COMPARE_VERSION | ||