1 dnl as-ac-expand.m4 0.2.0
2 dnl autostars m4 macro for expanding directories using configure's prefix
3 dnl thomas@apestaart.org
6 dnl AS_AC_EXPAND(VAR, CONFIGURE_VAR)
8 dnl AS_AC_EXPAND(SYSCONFDIR, $sysconfdir)
9 dnl will set SYSCONFDIR to /usr/local/etc if prefix=/usr/local
11 AC_DEFUN([AS_AC_EXPAND],
16 dnl first expand prefix and exec_prefix if necessary
18 exec_prefix_save=$exec_prefix
20 dnl if no prefix given, then use /usr/local, the default prefix
21 if test "x$prefix" = "xNONE"; then
22 prefix="$ac_default_prefix"
24 dnl if no exec_prefix given, then use prefix
25 if test "x$exec_prefix" = "xNONE"; then
30 dnl loop until it doesn't change anymore
32 new_full_var="`eval echo $full_var`"
33 if test "x$new_full_var" = "x$full_var"; then break; fi
34 full_var=$new_full_var
38 full_var=$new_full_var
39 AC_SUBST([$1], "$full_var")
41 dnl restore prefix and exec_prefix
43 exec_prefix=$exec_prefix_save
46 dnl Available from the GNU Autoconf Macro Archive at:
47 dnl http://www.gnu.org/software/ac-archive/htmldoc/ax_compare_version.html
48 AC_DEFUN([AX_COMPARE_VERSION], [
49 # Used to indicate true or false condition
50 ax_compare_version=false
51 # Convert the two version strings to be compared into a format that
52 # allows a simple string comparison. The end result is that a version
53 # string of the form 1.12.5-r617 will be converted to the form
54 # 0001001200050617. In other words, each number is zero padded to four
55 # digits, and non digits are removed.
56 AS_VAR_PUSHDEF([A],[ax_compare_version_A])
57 A=`echo "$1" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \
58 -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \
59 -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \
60 -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \
63 AS_VAR_PUSHDEF([B],[ax_compare_version_B])
64 B=`echo "$3" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \
65 -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \
66 -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \
67 -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \
70 dnl # In the case of le, ge, lt, and gt, the strings are sorted as necessary
71 dnl # then the first line is used to determine if the condition is true.
72 dnl # The sed right after the echo is to remove any indented white space.
73 m4_case(m4_tolower($2),
75 ax_compare_version=`echo "x$A
76 x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/false/;s/x${B}/true/;1q"`
79 ax_compare_version=`echo "x$A
80 x$B" | sed 's/^ *//' | sort | sed "s/x${A}/false/;s/x${B}/true/;1q"`
83 ax_compare_version=`echo "x$A
84 x$B" | sed 's/^ *//' | sort | sed "s/x${A}/true/;s/x${B}/false/;1q"`
87 ax_compare_version=`echo "x$A
88 x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/true/;s/x${B}/false/;1q"`
90 dnl Split the operator from the subversion count if present.
91 m4_bmatch(m4_substr($2,2),
93 # A count of zero means use the length of the shorter version.
94 # Determine the number of characters in A and B.
95 ax_compare_version_len_A=`echo "$A" | awk '{print(length)}'`
96 ax_compare_version_len_B=`echo "$B" | awk '{print(length)}'`
98 # Set A to no more than B's length and B to no more than A's length.
99 A=`echo "$A" | sed "s/\(.\{$ax_compare_version_len_B\}\).*/\1/"`
100 B=`echo "$B" | sed "s/\(.\{$ax_compare_version_len_A\}\).*/\1/"`
103 # A count greater than zero means use only that many subversions
104 A=`echo "$A" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"`
105 B=`echo "$B" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"`
109 [illegal OP numeric parameter: $2])
112 # Pad zeros at end of numbers to make same length.
113 ax_compare_version_tmp_A="$A`echo $B | sed 's/./0/g'`"
114 B="$B`echo $A | sed 's/./0/g'`"
115 A="$ax_compare_version_tmp_A"
117 # Check for equality or inequality as necessary.
118 m4_case(m4_tolower(m4_substr($2,0,2)),
120 test "x$A" = "x$B" && ax_compare_version=true
123 test "x$A" != "x$B" && ax_compare_version=true
125 AC_WARNING([illegal OP parameter: $2])
129 AS_VAR_POPDEF([A])dnl
130 AS_VAR_POPDEF([B])dnl
132 dnl # Execute ACTION-IF-TRUE / ACTION-IF-FALSE.
133 if test "$ax_compare_version" = "true" ; then
134 m4_ifvaln([$4],[$4],[:])dnl
135 m4_ifvaln([$5],[else $5])dnl
137 ]) dnl AX_COMPARE_VERSION