projects / lttng-tools.git / blame
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|---|---|---|
| 926c87ac JR |
1 | # =========================================================================== |
| 2 | # http://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 11 | |
| 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 | [illegal 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([illegal 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 |