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2b4887a2 | 1 | # =========================================================================== |
6e5d9dfa | 2 | # https://www.gnu.org/software/autoconf-archive/ax_compare_version.html |
2b4887a2 JR |
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 | ||
7fcdef32 | 82 | #serial 13 |
2b4887a2 JR |
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( | |
7fcdef32 | 149 | [invalid OP numeric parameter: $2]) |
2b4887a2 JR |
150 | ],[]) |
151 | ||
152 | # Pad zeros at end of numbers to make same length. | |
153 | ax_compare_version_tmp_A="$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 | ],[ | |
7fcdef32 | 165 | AC_WARNING([invalid OP parameter: $2]) |
2b4887a2 JR |
166 | ]) |
167 | ]) | |
168 | ||
169 | AS_VAR_POPDEF([A])dnl | |
170 | AS_VAR_POPDEF([B])dnl | |
171 | ||
172 | dnl # Execute ACTION-IF-TRUE / ACTION-IF-FALSE. | |
173 | if test "$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 |