mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-22 10:50:07 +00:00
* 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.
This commit is contained in:
Roland McGrath
parent
8826885219
commit
361742eda9
19
ChangeLog
19
ChangeLog
@ -1,3 +1,22 @@
|
||||
2000-03-19 Roland McGrath <roland@baalperazim.frob.com>
|
||||
|
||||
* 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.
|
||||
|
||||
2000-03-18 Roland McGrath <roland@baalperazim.frob.com>
|
||||
|
||||
* Makeconfig (soversions.mk): Convert % -> # in shlib-versions
|
||||
|
||||
30
Makeconfig
30
Makeconfig
@ -687,23 +687,23 @@ $(common-objpfx)soversions.mk: $(..)shlib-versions $(..)Makeconfig \
|
||||
for f in $$file; do \
|
||||
sed 's/#.*$$//;s/^[ ]*%/#/' $$f \
|
||||
| $(CC) -include $(common-objpfx)config.h -E -x c - \
|
||||
| while read conf versions; do \
|
||||
test -n "$$versions" && \
|
||||
| while read conf version setname; do \
|
||||
test -n "$$version" && \
|
||||
test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
|
||||
: "$$conf"` != 0 || continue; \
|
||||
for v in $$versions; do \
|
||||
lib=`echo $$v | sed 's/=.*$$//'`; \
|
||||
if eval "test -z \"\$$vers_lib$$lib\""; then \
|
||||
eval vers_lib$${lib}=yes; \
|
||||
number=`echo $$v | sed "s/^.*=//"`; \
|
||||
case $$number in \
|
||||
[0-9]*) echo "$$lib.so-version=.$$number"; \
|
||||
echo "all-sonames+=$$lib.so\$$($$lib.so-version)";;\
|
||||
*) echo "$$lib.so-version=$$number"; \
|
||||
echo "all-sonames+=\$$($$lib.so-version)";; \
|
||||
esac; \
|
||||
fi; \
|
||||
done; \
|
||||
lib=`echo $$version | sed 's/=.*$$//'`; \
|
||||
if eval "test -z \"\$$versioners_lib$$lib\""; then \
|
||||
eval vers_lib$${lib}=yes; \
|
||||
number=`echo $$version | sed "s/^.*=//"`; \
|
||||
case $$number in \
|
||||
[0-9]*) echo "$$lib.so-version=.$$number"; \
|
||||
echo "all-sonames+=$$lib.so\$$($$lib.so-version)";;\
|
||||
*) echo "$$lib.so-version=$$number"; \
|
||||
echo "all-sonames+=\$$($$lib.so-version)";; \
|
||||
esac; \
|
||||
test -z "$$setname" || \
|
||||
echo "map-firstversions+=$${lib}:$${setname}"; \
|
||||
fi; \
|
||||
done; \
|
||||
done;) > $@T; exit 0
|
||||
mv -f $@T $@
|
||||
|
||||
28
Makerules
28
Makerules
@ -1,4 +1,5 @@
|
||||
# Copyright (C) 1991,92,93,94,95,96,97,98,99 Free Software Foundation, Inc.
|
||||
# Copyright (C) 1991,92,93,94,95,96,97,98,99,2000
|
||||
# Free Software Foundation, Inc.
|
||||
# This file is part of the GNU C Library.
|
||||
|
||||
# The GNU C Library is free software; you can redistribute it and/or
|
||||
@ -128,6 +129,18 @@ before-compile := $(filter $(common-objpfx)mach% $(common-objpfx)hurd%,\
|
||||
$(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\
|
||||
$(before-compile))
|
||||
|
||||
# Even before that, we need abi-versions.h which is generated right here.
|
||||
ifeq ($(versioning),yes)
|
||||
ifndef avoid-generated
|
||||
before-compile := $(common-objpfx)abi-versions.h $(before-compile)
|
||||
$(common-objpfx)abi-versions.h: $(..)scripts/abi-versions.awk \
|
||||
$(common-objpfx)Versions.all
|
||||
LC_ALL=C $(AWK) -f $^ > $@T
|
||||
mv -f $@T $@
|
||||
endif # avoid-generated
|
||||
endif # $(versioning) = yes
|
||||
|
||||
|
||||
# Remove existing files from `before-compile'. Things are added there when
|
||||
# they must exist for dependency generation to work right, but once they
|
||||
# exist there is no further need for every single file to depend on them,
|
||||
@ -277,9 +290,15 @@ ifneq ($(sysd-versions-subdirs),$(all-subdirs) $(config-sysdirs))
|
||||
sysd-versions-force = FORCE
|
||||
FORCE:
|
||||
endif
|
||||
$(common-objpfx)Versions.all: $(..)Versions.def \
|
||||
$(wildcard $(add-ons:%=$(..)%/Versions.def))
|
||||
cat $^ > $@T
|
||||
$(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
|
||||
$(..)Versions.def \
|
||||
$(wildcard $(add-ons:%=$(..)%/Versions.def)) \
|
||||
$(common-objpfx)soversions.mk
|
||||
{ for map in $(map-firstversions); do \
|
||||
echo $$map; \
|
||||
done | sed 's/:/ : /'; \
|
||||
cat $(filter-out $< $(common-objpfx)soversions.mk,$^); \
|
||||
} | LC_ALL=C $(AWK) -f $< > $@T
|
||||
mv -f $@T $@
|
||||
$(common-objpfx)sysd-versions: $(common-objpfx)Versions.all \
|
||||
$(..)scripts/versions.awk \
|
||||
@ -296,6 +315,7 @@ endif # avoid-generated
|
||||
endif # $(versioning) = yes
|
||||
endif # sysd-dirs-done
|
||||
|
||||
|
||||
ifndef compile-command.S
|
||||
compile-command.S = $(compile.S) $(OUTPUT_OPTION)
|
||||
endif
|
||||
|
||||
61
include/shlib-compat.h
Normal file
61
include/shlib-compat.h
Normal file
@ -0,0 +1,61 @@
|
||||
/* Macros for managing ABI-compatibility definitions using ELF symbol versions.
|
||||
Copyright (C) 2000 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Library General Public License as
|
||||
published by the Free Software Foundation; either version 2 of the
|
||||
License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Library General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Library General Public
|
||||
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
||||
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||
Boston, MA 02111-1307, USA. */
|
||||
|
||||
#ifndef _SHLIB_COMPAT_H
|
||||
#define _SHLIB_COMPAT_H 1
|
||||
|
||||
#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING
|
||||
|
||||
#include <abi-versions.h> /* header generated by abi-versions.awk */
|
||||
|
||||
/* The file abi-versions.h (generated by scripts/abi-versions.awk) defines
|
||||
symbols like `ABI_libm_GLIBC_2_0' to either 1 or 0 indicating whether or
|
||||
not we want to build binary compatibility for e.g. the GLIBC_2.0 version
|
||||
set into the libm shared object. If this evaluates to zero, then there
|
||||
is no need to compile in extra code to support this version set where it
|
||||
has been superseded by a newer version. The compatibility code should
|
||||
be conditionalized with `#if SHLIB_COMPAT (libm, GLIBC_2_0)'. */
|
||||
|
||||
#define SHLIB_COMPAT(lib, version) ABI_##lib##_##version
|
||||
|
||||
/* That header also defines symbols like `VERSION_libm_GLIBC_2_1' to
|
||||
the version set name to use for e.g. symbols first introduced into
|
||||
libm in the GLIBC_2.1 version. Definitions of symbols with explicit
|
||||
versions should look like:
|
||||
versioned_symbol (libm, new_foo, foo, GLIBC_2_1);
|
||||
This will define the symbol `foo' with the appropriate default version,
|
||||
i.e. either GLIBC_2.1 or the "earliest version" specified in
|
||||
shlib-versions if that is newer. */
|
||||
|
||||
#define versioned_symbol(lib, local, symbol, version) \
|
||||
default_symbol_version (local, symbol, VERSION_##lib##_##version)
|
||||
|
||||
#else
|
||||
|
||||
/* Not compiling ELF shared libraries at all, so never any old versions. */
|
||||
#define SHLIB_COMPAT(lib, version) 0
|
||||
|
||||
/* No versions to worry about, just make this the global definition. */
|
||||
#define versioned_symbol(lib, local, symbol, version) \
|
||||
weak_alias (local, symbol)
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
#endif /* shlib-compat.h */
|
||||
39
scripts/abi-versions.awk
Normal file
39
scripts/abi-versions.awk
Normal file
@ -0,0 +1,39 @@
|
||||
# Script to generate <abi-versions.h> header file from Versions.all list.
|
||||
# See include/shlib-compat.h comments for explanation.
|
||||
|
||||
BEGIN {
|
||||
print "/* This file is automatically generated by abi-versions.awk.";
|
||||
print " It defines symbols used by shlib-compat.h, which see. */";
|
||||
print "\n#ifndef _ABI_VERSIONS_H\n#define _ABI_VERSIONS_H";
|
||||
}
|
||||
|
||||
NF == 2 && $2 == "{" {
|
||||
thislib = $1;
|
||||
gsub(/[^A-Za-z0-9_ ]/, "_"); libid = $1;
|
||||
printf "\n/* start %s */\n", thislib;
|
||||
next;
|
||||
}
|
||||
$1 == "}" {
|
||||
printf "/* end %s */\n", thislib;
|
||||
next;
|
||||
}
|
||||
|
||||
$2 == "=" {
|
||||
new = $3;
|
||||
gsub(/[^A-Za-z0-9_ ]/, "_"); id = $1;
|
||||
printf "#define ABI_%s_%s\t0\t/* earliest supported %s */\n", libid, id, new;
|
||||
printf "#define VERSION_%s_%s\t%s\n", libid, id, new;
|
||||
next;
|
||||
}
|
||||
|
||||
{
|
||||
vers = $1;
|
||||
gsub(/[^A-Za-z0-9_ ]/, "_"); id = $1;
|
||||
printf "#define ABI_%s_%s\t1\t/* support %s */\n", libid, id, vers;
|
||||
printf "#define VERSION_%s_%s\t%s\n", libid, id, vers;
|
||||
next;
|
||||
}
|
||||
|
||||
END {
|
||||
print "\n#endif /* abi-versions.h */";
|
||||
}
|
||||
27
scripts/firstversions.awk
Normal file
27
scripts/firstversions.awk
Normal file
@ -0,0 +1,27 @@
|
||||
# Script to preprocess Versions.all lists based on "earliest version"
|
||||
# specifications in the shlib-versions file.
|
||||
|
||||
NF == 3 && $2 == ":" { firstversion[$1] = $3; next }
|
||||
|
||||
NF == 2 && $2 == "{" { thislib = $1; print; next }
|
||||
|
||||
$1 == "}" {
|
||||
if (firstversion[thislib]) {
|
||||
# We haven't seen the stated version, but have produced
|
||||
# others pointing to it, so we synthesize it now.
|
||||
printf " %s\n", firstversion[thislib];
|
||||
}
|
||||
print;
|
||||
next;
|
||||
}
|
||||
|
||||
{
|
||||
if (! firstversion[thislib])
|
||||
print;
|
||||
else if ($1 == firstversion[thislib]) {
|
||||
print;
|
||||
firstversion[thislib] = 0;
|
||||
}
|
||||
else
|
||||
print $1, "=", firstversion[thislib];
|
||||
}
|
||||
@ -16,7 +16,10 @@ BEGIN {
|
||||
libs[$1] = 1;
|
||||
curlib = $1;
|
||||
while (getline < defsfile && ! /^}/) {
|
||||
versions[$1] = 1;
|
||||
if ($2 == "=")
|
||||
renamed[$1] = $3;
|
||||
else
|
||||
versions[$1] = 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -33,6 +36,7 @@ BEGIN {
|
||||
|
||||
# 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";
|
||||
@ -43,11 +47,14 @@ BEGIN {
|
||||
|
||||
# This matches the beginning of a new version for the current library.
|
||||
/^ [A-Za-z_]/ {
|
||||
actver = $1;
|
||||
if (!versions[$1]) {
|
||||
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;
|
||||
}
|
||||
|
||||
|
||||
@ -8,8 +8,8 @@
|
||||
# This file can use cpp-style conditionals starting with % instead of #
|
||||
# to test the symbols defined in config.h by configure.
|
||||
|
||||
# Configuration Library versions
|
||||
# ------------- ------- --------
|
||||
# Configuration Library=version Earliest symbol set (optional)
|
||||
# ------------- --------------- ------------------------------
|
||||
|
||||
# The interface to -lm depends mostly only on cpu, not on operating system.
|
||||
i.86-.*-.* libm=6
|
||||
@ -33,7 +33,7 @@ alpha.*-.*-linux.* libc=6.1
|
||||
|
||||
# libc.so.0.2 is for the Hurd alpha release 0.2.
|
||||
%ifdef USE_IN_LIBIO /* experimental only! */
|
||||
.*-.*-gnu-gnu* libc=0.2.90.libio
|
||||
.*-.*-gnu-gnu* libc=0.2.90.libio GLIBC_2.2
|
||||
%else
|
||||
.*-.*-gnu-gnu* libc=0.2
|
||||
%endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user