1 # Script to preprocess Versions.all lists based on "earliest version"
2 # specifications in the shlib-versions file.
4 # Return -1, 0 or 1 according to whether v1 is less than, equal to or
5 # greater than v2 as a version string. Simplified from GNU Autoconf
6 # version; this one does not need to handle .0x fraction-style versions.
7 function vers_compare (v1, v2)
9 while (length(v1) && length(v2)) {
10 if (v1 ~ /^[0-9]/ && v2 ~ /^[0-9]/) {
11 for (len1 = 1; substr(v1, len1 + 1) ~ /^[0-9]/; len1++) continue;
12 for (len2 = 1; substr(v2, len2 + 1) ~ /^[0-9]/; len2++) continue;
13 d1 = substr(v1, 1, len1); v1 = substr(v1, len1 + 1);
14 d2 = substr(v2, 1, len2); v2 = substr(v2, len2 + 1);
18 d1 = substr(v1, 1, 1); v1 = substr(v1, 2);
19 d2 = substr(v2, 1, 1); v2 = substr(v2, 2);
21 if (d1 < d2) return -1;
22 if (d1 > d2) return 1;
24 if (length(v2)) return -1;
25 if (length(v1)) return 1;
30 for (i = 0; i <= NF - 3; ++i)
31 firstversion[$1, i] = $(3 + i);
36 NF == 2 && $2 == "{" { thislib = $1; print; next }
39 if ((thislib, idx[thislib]) in firstversion) {
40 # We haven't seen the stated version, but have produced
41 # others pointing to it, so we synthesize it now.
42 printf " %s\n", firstversion[thislib, idx[thislib]];
49 /GLIBC_PRIVATE/ { print; next }
52 if ((thislib, idx[thislib]) in firstversion) {
53 f = v = firstversion[thislib, idx[thislib]];
54 while (vers_compare($1, v) >= 0) {
55 delete firstversion[thislib, idx[thislib]];
57 if ((thislib, idx[thislib]) in firstversion) {
58 # If we're skipping a referenced version to jump ahead to a
59 # later version, synthesize the earlier referenced version now.
60 if (v != $1 && (thislib, v) in usedversion)
62 v = firstversion[thislib, idx[thislib]];
66 if ($1 == v || $1 == f)
67 # This version was the specified earliest version itself.
69 else if (vers_compare($1, v) < 0) {
70 # This version is older than the specified earliest version.
72 # Record that V has been referred to, so we will be sure to emit it
73 # if we hit a later one without hitting V itself.
74 usedversion[thislib, v] = 1;
77 # This version is newer than the specified earliest version.
78 # We haven't seen that version itself or else we wouldn't be here
79 # because we would have removed it from the firstversion array.
80 # If there were any earlier versions that used that one, emit it now.
81 if ((thislib, v) in usedversion) {