glibc/scripts/lib-names.awk

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# awk script for soversions.i -> gnu/lib-names.h; see Makeconfig.
$1 != "DEFAULT" { multi = 1 }
#
{
lib = $2;
version = $3;
if ($3 !~ /^[0-9]/) {
soname = $3;
extra = $3;
sub(/\.so.*$/, "", extra);
}
else {
soname = lib ".so." $3;
extra = "";
}
soname = "\"" soname "\"";
lib = toupper(lib);
extra = toupper(extra);
gsub(/-/, "_", lib);
gsub(/-/, "_", extra);
macros[$1 FS lib "_SO"] = soname;
if (extra)
macros[$1 FS extra "_SO"] = soname;
}
END {
print "/* This file is automatically generated.";
print " It defines macros to allow user program to find the shared";
print " library files which come as part of GNU libc. */";
print "#ifndef __GNU_LIB_NAMES_H";
print "#define __GNU_LIB_NAMES_H 1";
print "";
pfx = multi ? "# define " : "#define ";
for (elt in macros) {
split(elt, x);
line = sprintf("%-40s%s", pfx x[2], macros[elt]);
if (x[1] in lines)
lines[x[1]] = lines[x[1]] "\n" line;
else
lines[x[1]] = line;
}
if (multi) {
# Print these in a fixed order so the result is identical
# on both sides of the coin.
if (!("WORDSIZE32" in lines))
lines["WORDSIZE32"] = lines["DEFAULT"];
if (!("WORDSIZE64" in lines))
lines["WORDSIZE64"] = lines["DEFAULT"];
print "#include <bits/wordsize.h>\n";
print "#if __WORDSIZE == 32";
cmd = "LC_ALL=C sort"; print lines["WORDSIZE32"] | cmd; close(cmd);
print "#else"
cmd = "LC_ALL=C sort"; print lines["WORDSIZE64"] | cmd; close(cmd);
print "#endif";
}
else {
cmd = "LC_ALL=C sort"; print lines["DEFAULT"] | cmd; close(cmd);
}
print "";
print "#endif /* gnu/lib-names.h */"
}