154dcb1aea
The build system deduces inter-module dependencies from the symbols required and exported by the modules. This works well, except for some rare cases where the dependency is indirect or hidden. A module might not make use of any function of some other module, but still expect its functionality to be available to GRUB. To solve this, introduce a new file, currently empty, called extra_deps.lst to track these cases manually. This file gets processed in the same way as the automatically generated syminfo.lst, making it possible to inject data into the dependency resolver. Since *.lst files are set to be ignored by git, add an exception for extra_deps.lst. Additionally, introduce a new keyword for the syminfo.lst syntax: "depends" allows specifying a module dependency directly: depends <module> <depdendency>... Signed-off-by: Oliver Steffen <osteffen@redhat.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
109 lines
2.7 KiB
Awk
109 lines
2.7 KiB
Awk
#! /usr/bin/awk -f
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#
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# Copyright (C) 2006 Free Software Foundation, Inc.
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#
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# This genmoddep.awk is free software; the author
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
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# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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# PARTICULAR PURPOSE.
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# Read symbols' info from stdin.
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BEGIN {
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error = 0
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}
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{
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if ($1 == "defined") {
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if ($3 !~ /^\.refptr\./ && $3 in symtab) {
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printf "%s in %s is duplicated in %s\n", $3, $2, symtab[$3] >"/dev/stderr";
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error++;
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}
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symtab[$3] = $2;
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modtab[$2] = "" modtab[$2]
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} else if ($1 == "undefined") {
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if ($3 in symtab)
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modtab[$2] = modtab[$2] " " symtab[$3];
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else if ($3 != "__gnu_local_gp" && $3 != "_gp_disp") {
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printf "%s in %s is not defined\n", $3, $2 >"/dev/stderr";
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error++;
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}
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} else if ($1 == "depends") {
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for (i = 3; i <= NF; i++) {
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modtab[$2] = modtab[$2] " " $i;
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}
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}
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else {
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printf "error: %u: unrecognized input format\n", NR >"/dev/stderr";
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error++;
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}
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}
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# Output the result.
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END {
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if (error >= 1)
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exit 1;
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total_depcount = 0
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for (mod in modtab) {
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# Remove duplications.
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split(modtab[mod], depmods, " ");
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for (depmod in uniqmods) {
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delete uniqmods[depmod];
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}
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for (i in depmods) {
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depmod = depmods[i];
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# Ignore kernel, as always loaded.
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if (depmod != "kernel" && depmod != mod)
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uniqmods[depmod] = 1;
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}
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modlist = ""
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depcount[mod] = 0
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n = asorti(uniqmods, w)
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for (i = 1; i <= n; i++) {
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depmod = w[i]
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modlist = modlist " " depmod;
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inverse_dependencies[depmod] = inverse_dependencies[depmod] " " mod
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depcount[mod]++
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total_depcount++
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}
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if (mod == "all_video") {
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continue;
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}
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printf "%s:%s\n", mod, modlist;
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}
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# Check that we have no dependency circles
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while (total_depcount != 0) {
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something_done = 0
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for (mod in depcount) {
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if (depcount[mod] == 0) {
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delete depcount[mod]
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split(inverse_dependencies[mod], inv_depmods, " ");
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for (ctr in inv_depmods) {
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depcount[inv_depmods[ctr]]--
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total_depcount--
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}
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delete inverse_dependencies[mod]
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something_done = 1
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}
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}
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if (something_done == 0) {
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for (mod in depcount) {
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circle = circle " " mod
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}
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printf "error: modules %s form a dependency circle\n", circle >"/dev/stderr";
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exit 1
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}
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}
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modlist = ""
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while (getline <"video.lst") {
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modlist = modlist " " $1;
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}
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printf "all_video:%s\n", modlist;
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}
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