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Teach bsd.lib.mk to auto generate a version map file based on
a set of symbol definitions (VERSION_DEF) and symbol mappings (SYMBOL_MAPS). Add an awk script to generate the version map. Suggested by: ru Helped by: ru Reviewed by: ru
This commit is contained in:
Daniel Eischen
parent
888a664b2d
commit
ab52e99198
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=156772
@ -99,6 +99,46 @@ PO_FLAG=-pg
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all: objwarn
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# Generate the version map given the version definitions
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# and symbol maps.
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.if !empty(VERSION_DEF) && !empty(SYMBOL_MAPS)
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# Find the awk script that generates the version map.
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VERSION_GEN?= version_gen.awk
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VERSION_MAP?= Version.map
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# Compute the make's -m path.
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_mpath=
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_oarg=
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.for _arg in ${.MAKEFLAGS}
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.if ${_oarg} == "-m"
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_mpath+= ${_arg}
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.endif
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_oarg= ${_arg}
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.endfor
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_mpath+= /usr/share/mk
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# Look up ${VERSION_GEN} in ${_mpath}.
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_vgen=
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.for path in ${_mpath}
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.if empty(_vgen)
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.if exists(${path}/${VERSION_GEN})
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_vgen= ${path}/${VERSION_GEN}
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.endif
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.endif
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.endfor
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${VERSION_MAP}:
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awk -v vfile=${VERSION_DEF} -f ${_vgen} ${SYMBOL_MAPS} \
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> ${.TARGET}
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.endif # !empty(VERSION_DEF) && !empty(SYMBOL_MAPS)
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# Allow librararies to specify their own version map or have it
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# automatically generated (see above).
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.if !empty(VERSION_MAP)
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${SHLIB_NAME}: ${VERSION_MAP}
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LDFLAGS+= -Wl,--version-script=${VERSION_MAP}
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.endif
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.if defined(LIB) && !empty(LIB) || defined(SHLIB_NAME)
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OBJS+= ${SRCS:N*.h:R:S/$/.o/}
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.endif
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166
share/mk/version_gen.awk
Normal file
166
share/mk/version_gen.awk
Normal file
@ -0,0 +1,166 @@
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#
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# Copyright (C) 2006 Daniel M. Eischen. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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#
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# Make a list of all the library versions listed in the master file.
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#
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# versions[] - array indexed by version name, contains number
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# of symbols (+ 1) found for each version.
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# successors[] - array index by version name, contains successor
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# version name.
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# symbols[][] - array index by [version name, symbol index], contains
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# names of symbols defined for each version.
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#
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BEGIN {
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brackets = 0;
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errors = 0;
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version_count = 0;
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current_version = "";
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stderr = "/dev/stderr";
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while (getline < vfile) {
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# Strip comments.
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sub("#.*$", "", $0);
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# Strip trailing spaces.
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sub(" *$", "", $0);
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if (/^[ \t]*[a-zA-Z0-9._]+ *{/) {
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brackets++;
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symver = $1;
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versions[symver] = 1;
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successors[symver] = "";
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version_count++;
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}
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else if (/^[ \t]*} *[a-zA-Z0-9._]+ *;/) {
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# Strip semicolon.
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gsub(";", "", $2);
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if (symver == "")
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printf("Unmatched bracket.\n");
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else if (versions[$2] != 1)
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printf("File %s: %s has unknown " \
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"successor %s\n", vfile, symver, $2);
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else
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successors[symver] = $2;
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brackets--;
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}
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else if (/^[ \t]*};/) {
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if (symver == "")
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printf("File %s: Unmatched bracket.\n",
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vfile) > stderr;
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# No successor
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brackets--;
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}
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else if (/^[ \t]*}/) {
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printf("File %s: Missing ending semi-colon.\n",
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vfile) > stderr;
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}
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else if (/^$/)
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; # Ignore blank lines.
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else
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printf("File %s: Unknown directive: %s\n",
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vfile, $0) > stderr;
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}
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brackets = 0;
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}
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/.*/ {
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# Delete comments, preceding and trailing whitespace, then
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# consume blank lines.
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sub("#.*$", "", $0);
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sub("^[ \t]+", "", $0);
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sub("[ \t]+$", "", $0);
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if ($0 == "")
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next;
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}
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/^[a-zA-Z0-9._]+ +{$/ {
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# Strip bracket from version name.
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sub("{", "", $1);
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if (current_version != "")
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printf("File %s, line %d: Illegal nesting detected.\n",
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FILENAME, FNR) > stderr;
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else if (versions[$1] == 0) {
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printf("File %s, line %d: Undefined " \
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"library version %s\n", FILENAME, FNR, $1) > stderr;
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# Remove this entry from the versions.
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delete versions[$1];
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}
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else
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current_version = $1;
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brackets++;
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next;
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}
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/^[a-zA-Z0-9._]+ *;$/ {
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if (current_version != "") {
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count = versions[current_version];
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versions[current_version]++;
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symbols[current_version, count] = $1;
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}
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next;
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}
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/^} *;$/ {
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brackets--;
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if (brackets < 0) {
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printf("File %s, line %d: Unmatched bracket.\n",
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FILENAME, FNR, $1) > stderr;
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brackets = 0; # Reset
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}
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current_version = "";
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next;
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}
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/.*/ {
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printf("File %s, line %d: Unknown directive: '%s'\n",
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FILENAME, FNR, $0) > stderr;
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}
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END {
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for (v in versions) {
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printf("\n");
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printf("%s {\n", v);
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# The version count is always one more that actual,
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# so the loop ranges from 1 to n-1.
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#
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for (i = 1; i < versions[v]; i++) {
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if (i == 1)
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printf("global:\n");
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printf("\t%s\n", symbols[v, i]);
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}
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if (successors[v] == "") {
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# This version succeeds no other version.
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printf("local:\n");
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printf("\t*;\n");
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printf("};\n");
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}
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else
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printf("} %s;\n", successors[v]);
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}
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}
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