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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,164 @@ | ||
| dnl (from http://autoconf-archive.cryp.to/ax_compare_version.m4 ) | ||
| dnl | ||
| dnl @synopsis AX_COMPARE_VERSION(VERSION_A, OP, VERSION_B, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) | ||
| dnl | ||
| dnl This macro compares two version strings. It is used heavily in the | ||
| dnl macro _AX_PATH_BDB for library checking. Due to the various number | ||
| dnl of minor-version numbers that can exist, and the fact that string | ||
| dnl comparisons are not compatible with numeric comparisons, this is | ||
| dnl not necessarily trivial to do in a autoconf script. This macro | ||
| dnl makes doing these comparisons easy. | ||
| dnl | ||
| dnl The six basic comparisons are available, as well as checking | ||
| dnl equality limited to a certain number of minor-version levels. | ||
| dnl | ||
| dnl The operator OP determines what type of comparison to do, and can | ||
| dnl be one of: | ||
| dnl | ||
| dnl eq - equal (test A == B) | ||
| dnl ne - not equal (test A != B) | ||
| dnl le - less than or equal (test A <= B) | ||
| dnl ge - greater than or equal (test A >= B) | ||
| dnl lt - less than (test A < B) | ||
| dnl gt - greater than (test A > B) | ||
| dnl | ||
| dnl Additionally, the eq and ne operator can have a number after it to | ||
| dnl limit the test to that number of minor versions. | ||
| dnl | ||
| dnl eq0 - equal up to the length of the shorter version | ||
| dnl ne0 - not equal up to the length of the shorter version | ||
| dnl eqN - equal up to N sub-version levels | ||
| dnl neN - not equal up to N sub-version levels | ||
| dnl | ||
| dnl When the condition is true, shell commands ACTION-IF-TRUE are run, | ||
| dnl otherwise shell commands ACTION-IF-FALSE are run. The environment | ||
| dnl variable 'ax_compare_version' is always set to either 'true' or | ||
| dnl 'false' as well. | ||
| dnl | ||
| dnl Examples: | ||
| dnl | ||
| dnl AX_COMPARE_VERSION([3.15.7],[lt],[3.15.8]) | ||
| dnl AX_COMPARE_VERSION([3.15],[lt],[3.15.8]) | ||
| dnl | ||
| dnl would both be true. | ||
| dnl | ||
| dnl AX_COMPARE_VERSION([3.15.7],[eq],[3.15.8]) | ||
| dnl AX_COMPARE_VERSION([3.15],[gt],[3.15.8]) | ||
| dnl | ||
| dnl would both be false. | ||
| dnl | ||
| dnl AX_COMPARE_VERSION([3.15.7],[eq2],[3.15.8]) | ||
| dnl | ||
| dnl would be true because it is only comparing two minor versions. | ||
| dnl | ||
| dnl AX_COMPARE_VERSION([3.15.7],[eq0],[3.15]) | ||
| dnl | ||
| dnl would be true because it is only comparing the lesser number of | ||
| dnl minor versions of the two values. | ||
| dnl | ||
| dnl Note: The characters that separate the version numbers do not | ||
| dnl matter. An empty string is the same as version 0. OP is evaluated | ||
| dnl by autoconf, not configure, so must be a string, not a variable. | ||
| dnl | ||
| dnl The author would like to acknowledge Guido Draheim whose advice | ||
| dnl about the m4_case and m4_ifvaln functions make this macro only | ||
| dnl include the portions necessary to perform the specific comparison | ||
| dnl specified by the OP argument in the final configure script. | ||
| dnl | ||
| dnl @category Misc | ||
| dnl @author Tim Toolan <toolan@ele.uri.edu> | ||
| dnl @version 2004-03-01 | ||
| dnl @license GPLWithACException | ||
|
|
||
| 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 |
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