forked from neil/lxc-templates
138 lines
4.6 KiB
Plaintext
138 lines
4.6 KiB
Plaintext
dnl as-ac-expand.m4 0.2.0
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dnl autostars m4 macro for expanding directories using configure's prefix
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dnl thomas@apestaart.org
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dnl
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dnl AS_AC_EXPAND(VAR, CONFIGURE_VAR)
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dnl example
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dnl AS_AC_EXPAND(SYSCONFDIR, $sysconfdir)
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dnl will set SYSCONFDIR to /usr/local/etc if prefix=/usr/local
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AC_DEFUN([AS_AC_EXPAND],
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[
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EXP_VAR=[$1]
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FROM_VAR=[$2]
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dnl first expand prefix and exec_prefix if necessary
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prefix_save=$prefix
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exec_prefix_save=$exec_prefix
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dnl if no prefix given, then use /usr/local, the default prefix
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if test "x$prefix" = "xNONE"; then
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prefix="$ac_default_prefix"
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fi
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dnl if no exec_prefix given, then use prefix
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if test "x$exec_prefix" = "xNONE"; then
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exec_prefix=$prefix
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fi
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full_var="$FROM_VAR"
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dnl loop until it doesn't change anymore
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while true; do
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new_full_var="`eval echo $full_var`"
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if test "x$new_full_var" = "x$full_var"; then break; fi
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full_var=$new_full_var
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done
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dnl clean up
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full_var=$new_full_var
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AC_SUBST([$1], "$full_var")
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dnl restore prefix and exec_prefix
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prefix=$prefix_save
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exec_prefix=$exec_prefix_save
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])
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dnl Available from the GNU Autoconf Macro Archive at:
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dnl http://www.gnu.org/software/ac-archive/htmldoc/ax_compare_version.html
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AC_DEFUN([AX_COMPARE_VERSION], [
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# Used to indicate true or false condition
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ax_compare_version=false
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# Convert the two version strings to be compared into a format that
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# allows a simple string comparison. The end result is that a version
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# string of the form 1.12.5-r617 will be converted to the form
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# 0001001200050617. In other words, each number is zero padded to four
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# digits, and non digits are removed.
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AS_VAR_PUSHDEF([A],[ax_compare_version_A])
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A=`echo "$1" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \
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-e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \
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-e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \
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-e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \
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-e 's/[[^0-9]]//g'`
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AS_VAR_PUSHDEF([B],[ax_compare_version_B])
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B=`echo "$3" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \
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-e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \
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-e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \
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-e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \
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-e 's/[[^0-9]]//g'`
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dnl # In the case of le, ge, lt, and gt, the strings are sorted as necessary
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dnl # then the first line is used to determine if the condition is true.
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dnl # The sed right after the echo is to remove any indented white space.
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m4_case(m4_tolower($2),
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[lt],[
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ax_compare_version=`echo "x$A
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x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/false/;s/x${B}/true/;1q"`
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],
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[gt],[
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ax_compare_version=`echo "x$A
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x$B" | sed 's/^ *//' | sort | sed "s/x${A}/false/;s/x${B}/true/;1q"`
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],
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[le],[
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ax_compare_version=`echo "x$A
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x$B" | sed 's/^ *//' | sort | sed "s/x${A}/true/;s/x${B}/false/;1q"`
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],
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[ge],[
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ax_compare_version=`echo "x$A
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x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/true/;s/x${B}/false/;1q"`
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],[
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dnl Split the operator from the subversion count if present.
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m4_bmatch(m4_substr($2,2),
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[0],[
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# A count of zero means use the length of the shorter version.
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# Determine the number of characters in A and B.
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ax_compare_version_len_A=`echo "$A" | awk '{print(length)}'`
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ax_compare_version_len_B=`echo "$B" | awk '{print(length)}'`
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# Set A to no more than B's length and B to no more than A's length.
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A=`echo "$A" | sed "s/\(.\{$ax_compare_version_len_B\}\).*/\1/"`
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B=`echo "$B" | sed "s/\(.\{$ax_compare_version_len_A\}\).*/\1/"`
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],
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[[0-9]+],[
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# A count greater than zero means use only that many subversions
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A=`echo "$A" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"`
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B=`echo "$B" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"`
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],
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[.+],[
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AC_WARNING(
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[illegal OP numeric parameter: $2])
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],[])
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# Pad zeros at end of numbers to make same length.
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ax_compare_version_tmp_A="$A`echo $B | sed 's/./0/g'`"
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B="$B`echo $A | sed 's/./0/g'`"
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A="$ax_compare_version_tmp_A"
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# Check for equality or inequality as necessary.
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m4_case(m4_tolower(m4_substr($2,0,2)),
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[eq],[
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test "x$A" = "x$B" && ax_compare_version=true
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],
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[ne],[
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test "x$A" != "x$B" && ax_compare_version=true
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],[
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AC_WARNING([illegal OP parameter: $2])
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])
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])
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AS_VAR_POPDEF([A])dnl
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AS_VAR_POPDEF([B])dnl
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dnl # Execute ACTION-IF-TRUE / ACTION-IF-FALSE.
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if test "$ax_compare_version" = "true" ; then
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m4_ifvaln([$4],[$4],[:])dnl
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m4_ifvaln([$5],[else $5])dnl
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fi
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]) dnl AX_COMPARE_VERSION
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