##### http://autoconf-archive.cryp.to/ax_compare_version.html # # SYNOPSIS # # AX_COMPARE_VERSION(VERSION_A, OP, VERSION_B, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) # # DESCRIPTION # # This macro compares two version strings. It is used heavily in the # macro _AX_PATH_BDB for library checking. Due to the various number # of minor-version numbers that can exist, and the fact that string # comparisons are not compatible with numeric comparisons, this is # not necessarily trivial to do in a autoconf script. This macro # makes doing these comparisons easy. # # The six basic comparisons are available, as well as checking # equality limited to a certain number of minor-version levels. # # The operator OP determines what type of comparison to do, and can # be one of: # # eq - equal (test A == B) # ne - not equal (test A != B) # le - less than or equal (test A <= B) # ge - greater than or equal (test A >= B) # lt - less than (test A < B) # gt - greater than (test A > B) # # Additionally, the eq and ne operator can have a number after it to # limit the test to that number of minor versions. # # eq0 - equal up to the length of the shorter version # ne0 - not equal up to the length of the shorter version # eqN - equal up to N sub-version levels # neN - not equal up to N sub-version levels # # When the condition is true, shell commands ACTION-IF-TRUE are run, # otherwise shell commands ACTION-IF-FALSE are run. The environment # variable 'ax_compare_version' is always set to either 'true' or # 'false' as well. # # Examples: # # AX_COMPARE_VERSION([3.15.7],[lt],[3.15.8]) # AX_COMPARE_VERSION([3.15],[lt],[3.15.8]) # # would both be true. # # AX_COMPARE_VERSION([3.15.7],[eq],[3.15.8]) # AX_COMPARE_VERSION([3.15],[gt],[3.15.8]) # # would both be false. # # AX_COMPARE_VERSION([3.15.7],[eq2],[3.15.8]) # # would be true because it is only comparing two minor versions. # # AX_COMPARE_VERSION([3.15.7],[eq0],[3.15]) # # would be true because it is only comparing the lesser number of # minor versions of the two values. # # Note: The characters that separate the version numbers do not # matter. An empty string is the same as version 0. OP is evaluated # by autoconf, not configure, so must be a string, not a variable. # # The author would like to acknowledge Guido Draheim whose advice # about the m4_case and m4_ifvaln functions make this macro only # include the portions necessary to perform the specific comparison # specified by the OP argument in the final configure script. # # LAST MODIFICATION # # 2004-03-01 # # COPYLEFT # # Copyright (c) 2004 Tim Toolan # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License as # published by the Free Software Foundation; either version 2 of the # License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA # 02111-1307, USA. # # As a special exception, the respective Autoconf Macro's copyright # owner gives unlimited permission to copy, distribute and modify the # configure scripts that are the output of Autoconf when processing # the Macro. You need not follow the terms of the GNU General Public # License when using or distributing such scripts, even though # portions of the text of the Macro appear in them. The GNU General # Public License (GPL) does govern all other use of the material that # constitutes the Autoconf Macro. # # This special exception to the GPL applies to versions of the # Autoconf Macro released by the Autoconf Macro Archive. When you # make and distribute a modified version of the Autoconf Macro, you # may extend this special exception to the GPL to apply to your # modified version as well. dnl ######################################################################### AC_DEFUN([AX_COMPARE_VERSION], [ # Used to indicate true or false condition ax_compare_version=false # Convert the two version strings to be compared into a format that # allows a simple string comparison. The end result is that a version # string of the form 1.12.5-r617 will be converted to the form # 0001001200050617. In other words, each number is zero padded to four # digits, and non digits are removed. AS_VAR_PUSHDEF([A],[ax_compare_version_A]) A=`echo "$1" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \ -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \ -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \ -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \ -e 's/[[^0-9]]//g'` AS_VAR_PUSHDEF([B],[ax_compare_version_B]) B=`echo "$3" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \ -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \ -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \ -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \ -e 's/[[^0-9]]//g'` dnl # In the case of le, ge, lt, and gt, the strings are sorted as necessary dnl # then the first line is used to determine if the condition is true. dnl # The sed right after the echo is to remove any indented white space. m4_case(m4_tolower($2), [lt],[ ax_compare_version=`echo "x$A x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/false/;s/x${B}/true/;1q"` ], [gt],[ ax_compare_version=`echo "x$A x$B" | sed 's/^ *//' | sort | sed "s/x${A}/false/;s/x${B}/true/;1q"` ], [le],[ ax_compare_version=`echo "x$A x$B" | sed 's/^ *//' | sort | sed "s/x${A}/true/;s/x${B}/false/;1q"` ], [ge],[ ax_compare_version=`echo "x$A x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/true/;s/x${B}/false/;1q"` ],[ dnl Split the operator from the subversion count if present. m4_bmatch(m4_substr($2,2), [0],[ # A count of zero means use the length of the shorter version. # Determine the number of characters in A and B. ax_compare_version_len_A=`echo "$A" | awk '{print(length)}'` ax_compare_version_len_B=`echo "$B" | awk '{print(length)}'` # Set A to no more than B's length and B to no more than A's length. A=`echo "$A" | sed "s/\(.\{$ax_compare_version_len_B\}\).*/\1/"` B=`echo "$B" | sed "s/\(.\{$ax_compare_version_len_A\}\).*/\1/"` ], [[0-9]+],[ # A count greater than zero means use only that many subversions A=`echo "$A" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"` B=`echo "$B" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"` ], [.+],[ AC_WARNING( [illegal OP numeric parameter: $2]) ],[]) # Pad zeros at end of numbers to make same length. ax_compare_version_tmp_A="$A`echo $B | sed 's/./0/g'`" B="$B`echo $A | sed 's/./0/g'`" A="$ax_compare_version_tmp_A" # Check for equality or inequality as necessary. m4_case(m4_tolower(m4_substr($2,0,2)), [eq],[ test "x$A" = "x$B" && ax_compare_version=true ], [ne],[ test "x$A" != "x$B" && ax_compare_version=true ],[ AC_WARNING([illegal OP parameter: $2]) ]) ]) AS_VAR_POPDEF([A])dnl AS_VAR_POPDEF([B])dnl dnl # Execute ACTION-IF-TRUE / ACTION-IF-FALSE. if test "$ax_compare_version" = "true" ; then m4_ifvaln([$4],[$4],[:])dnl m4_ifvaln([$5],[else $5])dnl fi ]) dnl AX_COMPARE_VERSION