diff options
Diffstat (limited to 'config')
| -rw-r--r-- | config/acinclude.m4 | 95 |
1 files changed, 94 insertions, 1 deletions
diff --git a/config/acinclude.m4 b/config/acinclude.m4 index 02629ce..a36fdf3 100644 --- a/config/acinclude.m4 +++ b/config/acinclude.m4 @@ -41,4 +41,97 @@ AC_DEFUN([AS_AC_EXPAND], dnl restore prefix and exec_prefix prefix=$prefix_save exec_prefix=$exec_prefix_save -])
\ No newline at end of file +]) + +dnl Available from the GNU Autoconf Macro Archive at: +dnl http://www.gnu.org/software/ac-archive/htmldoc/ax_compare_version.html +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 |