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 84dnl ######################################################################### 85AC_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 116x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/false/;s/x${B}/true/;1q"` 117 ], 118 [gt],[ 119 ax_compare_version=`echo "x$A 120x$B" | sed 's/^ *//' | sort | sed "s/x${A}/false/;s/x${B}/true/;1q"` 121 ], 122 [le],[ 123 ax_compare_version=`echo "x$A 124x$B" | sed 's/^ *//' | sort | sed "s/x${A}/true/;s/x${B}/false/;1q"` 125 ], 126 [ge],[ 127 ax_compare_version=`echo "x$A 128x$B" | sed 's/^ *//' | sort -r | sed "s/x${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 178