glibc/scripts/versions.awk
Roland McGrath 361742eda9 * shlib-versions [USE_IN_LIBIO] (.*-.*-gnu-gnu*): Set earliest
supported version for libc 0.2.90.libio to GLIBC_2.2.

	* Makeconfig (soversions.mk): Grok new third column in shlib-versions,
	and use it to emit new variable `map-firstversions'.
	* scripts/firstversions.awk: New file.
	* Makerules (Versions.all): Use scripts/firstversions.awk and
	the $(map-firstversions) value to generate a modified versions list
	that includes renames in "A = B" syntax for each version set earlier
	than the "earliest symbol version" named in shlib-versions.
	* scripts/versions.awk: Recognize "A = B" lines in the input to mean
	rename version set A to B in the output to the intermediate file.
	* scripts/abi-versions.awk: New file.
	* Makerules (abi-versions.h): New target, generated by that script.
	[$(versioning) = yes] (before-compile): Prepend abi-versions.h.
	* include/shlib-compat.h: New file, uses that generated header.
2000-03-19 20:36:44 +00:00

121 lines
2.7 KiB
Awk

# Combine version map fragments into version files for the generated
# shared object.
# (C) Copyright 1998, 1999 Free Software Foundation, Inc.
# Written by Ulrich Drepper <drepper@cygnus.com>, 1998.
# This script expects the following variables to be defined:
# defsfile name of Versions.def file
# buildroot name of build directory with trailing slash
# move_if_change move-if-change command
# Read definitions for the versions.
BEGIN {
nlibs=0;
while (getline < defsfile) {
if (/^[a-zA-Z0-9_.]+ \{/) {
libs[$1] = 1;
curlib = $1;
while (getline < defsfile && ! /^}/) {
if ($2 == "=")
renamed[$1] = $3;
else
versions[$1] = 1;
}
}
}
close(defsfile);
tmpfile = buildroot "Versions.tmp";
sort = "sort -n > " tmpfile;
}
# Remove comment lines.
/^ *#/ {
next;
}
# This matches the beginning of the version information for a new library.
/^[a-zA-Z0-9_.]+/ {
delete renamed;
actlib = $1;
if (!libs[$1]) {
printf("no versions defined for %s\n", $1) > "/dev/stderr";
exit 1;
}
next;
}
# This matches the beginning of a new version for the current library.
/^ [A-Za-z_]/ {
if (renamed[$1])
actver = renamed[$1];
else if (!versions[$1]) {
printf("version %s not defined\n", $1) > "/dev/stderr";
exit 1;
}
else
actver = $1;
next;
}
# This matches lines with names to be added to the current version in the
# current library. This is the only place where we print something to
# the intermediate file.
/^ / {
printf("%s %s %s\n", actlib, actver, $0) | sort;
}
function closeversion(name, oldname) {
if (firstinfile) {
printf(" local:\n *;\n") > outfile;
firstinfile = 0;
}
printf("}%s;\n", oldname) > outfile;
}
function close_and_move(name, real_name) {
close(name);
system(move_if_change " " name " " real_name " >&2");
}
# Now print the accumulated information.
END {
close(sort);
oldlib = "";
oldver = "";
printf("version-maps =");
while(getline < tmpfile) {
if ($1 != oldlib) {
if (oldlib != "") {
closeversion(oldver, veryoldver);
oldver = "";
close_and_move(outfile, real_outfile);
}
oldlib = $1;
real_outfile = buildroot oldlib ".map";
outfile = real_outfile "T";
firstinfile = 1;
veryoldver = "";
printf(" %s.map", oldlib);
}
if ($2 != oldver) {
if (oldver != "") {
closeversion(oldver, veryoldver);
veryoldver = oldver;
}
printf("%s {\n global:\n", $2) > outfile;
oldver = $2;
}
printf(" ") > outfile;
for (n = 3; n <= NF; ++n) {
printf(" %s", $n) > outfile;
}
printf("\n") > outfile;
}
printf("\n");
closeversion(oldver, veryoldver);
close_and_move(outfile, real_outfile);
system("rm -f " tmpfile);
}