glibc/scripts/versionlist.awk

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# Extract ordered list of version sets from Versions files.
# Copyright (C) 2014-2018 Free Software Foundation, Inc.
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BEGIN { in_lib = ""; in_version = 0 }
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!in_lib && NF == 2 && $2 == "{" {
in_lib = $1;
all_libs[in_lib] = 1;
next
}
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!in_lib { next }
NF == 2 && $2 == "{" {
in_version = 1;
lib_versions[in_lib, $1] = 1;
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# Partition the version sets into GLIBC_* and others.
if ($1 ~ /GLIBC_/) {
libs[in_lib] = libs[in_lib] " " $1 "\n";
all_versions[$1] = 1;
}
else {
others_libs[in_lib] = others_libs[in_lib] " " $1 "\n";
others_all_versions[$1] = 1;
}
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next
}
in_version && $1 == "}" { in_version = 0; next }
in_version { next }
$1 == "}" { in_lib = ""; next }
END {
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nlibs = asorti(all_libs, libs_order);
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for (i = 1; i <= nlibs; ++i) {
lib = libs_order[i];
for (v in all_versions) {
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if (!((lib, v) in lib_versions)) {
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libs[lib] = libs[lib] " " v "\n";
}
}
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for (v in others_all_versions) {
if (!((lib, v) in lib_versions)) {
others_libs[lib] = others_libs[lib] " " v "\n";
}
}
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print lib, "{";
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# Sort and print all the GLIBC_* sets first, then all the others.
# This is not really generically right, but it suffices
# for the cases we have so far. e.g. GCC_3.0 is "later than"
# all GLIBC_* sets that matter for purposes of Versions files.
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sort = "sort -u -t. -k 1,1 -k 2n,2n -k 3";
printf "%s", libs[lib] | sort;
close(sort);
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sort = "sort -u -t. -k 1,1 -k 2n,2n -k 3";
printf "%s", others_libs[lib] | sort;
close(sort);
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print "}";
}
}