diff options
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/doc/install.texi | 114 | ||||
| -rw-r--r-- | libgcc/ChangeLog | 7 | ||||
| -rw-r--r-- | libgcc/config/rs6000/t-slibgcc-aix | 82 | ||||
| -rw-r--r-- | libgcc/configure | 28 | ||||
| -rw-r--r-- | libgcc/configure.ac | 17 |
6 files changed, 236 insertions, 16 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index dc7e080..20bcbaa 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2014-12-09 Michael Haubenwallner <michael.haubenwallner@ssi-schaefer.com> + + * doc/install.texi: Describe --with-aix-soname option. + 2014-12-09 Alan Lawrence <alan.lawrence@arm.com> * config/aarch64/aarch64-simd.md (aarch64_get_lanedi): Remove. diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi index 59bbac7..488c1f8 100644 --- a/gcc/doc/install.texi +++ b/gcc/doc/install.texi @@ -1430,6 +1430,114 @@ particularly useful if you intend to use several versions of GCC in parallel. This is currently supported by @samp{libgfortran}, @samp{libjava}, @samp{libstdc++}, and @samp{libobjc}. +@item @anchor{WithAixSoname}--with-aix-soname=@samp{aix}, @samp{svr4} or @samp{both} +Traditional AIX shared library versioning (versioned @code{Shared Object} +files as members of unversioned @code{Archive Library} files named +@samp{lib.a}) causes numerous headaches for package managers. However, +@code{Import Files} as members of @code{Archive Library} files allow for +@strong{filename-based versioning} of shared libraries as seen on Linux/SVR4, +where this is called the "SONAME". But as they prevent static linking, +@code{Import Files} may be used with @code{Runtime Linking} only, where the +linker does search for @samp{libNAME.so} before @samp{libNAME.a} library +filenames with the @samp{-lNAME} linker flag. + +@anchor{AixLdCommand}For detailed information please refer to the AIX +@uref{http://www-01.ibm.com/support/knowledgecenter/search/%22the%20ld%20command%2C%20also%20called%20the%20linkage%20editor%20or%20binder%22,,ld +Command} reference. + +As long as shared library creation is enabled, upon: +@table @code +@item --with-aix-soname=aix +@item --with-aix-soname=both + A (traditional AIX) @code{Shared Archive Library} file is created: + @itemize @bullet + @item using the @samp{libNAME.a} filename scheme + @item with the @code{Shared Object} file as archive member named + @samp{libNAME.so.V} (except for @samp{libgcc_s}, where the @code{Shared + Object} file is named @samp{shr.o} for backwards compatibility), which + @itemize @minus + @item is used for runtime loading from inside the @samp{libNAME.a} file + @item is used for dynamic loading via + @code{dlopen("libNAME.a(libNAME.so.V)", RTLD_MEMBER)} + @item is used for shared linking + @item is used for static linking, so no separate @code{Static Archive + Library} file is needed + @end itemize + @end itemize +@item --with-aix-soname=both +@item --with-aix-soname=svr4 + A (second) @code{Shared Archive Library} file is created: + @itemize @bullet + @item using the @samp{libNAME.so.V} filename scheme + @item with the @code{Shared Object} file as archive member named + @samp{shr.o}, which + @itemize @minus + @item is created with the @code{-G linker flag} + @item has the @code{F_LOADONLY} flag set + @item is used for runtime loading from inside the @samp{libNAME.so.V} file + @item is used for dynamic loading via @code{dlopen("libNAME.so.V(shr.o)", + RTLD_MEMBER)} + @end itemize + @item with the @code{Import File} as archive member named @samp{shr.imp}, + which + @itemize @minus + @item refers to @samp{libNAME.so.V(shr.o)} as the "SONAME", to be recorded + in the @code{Loader Section} of subsequent binaries + @item indicates whether @samp{libNAME.so.V(shr.o)} is 32 or 64 bit + @item lists all the public symbols exported by @samp{lib.so.V(shr.o)}, + eventually decorated with the @code{@samp{weak} Keyword} + @item is necessary for shared linking against @samp{lib.so.V(shr.o)} + @end itemize + @end itemize + A symbolic link using the @samp{libNAME.so} filename scheme is created: + @itemize @bullet + @item pointing to the @samp{libNAME.so.V} @code{Shared Archive Library} file + @item to permit the @code{ld Command} to find @samp{lib.so.V(shr.imp)} via + the @samp{-lNAME} argument (requires @code{Runtime Linking} to be enabled) + @item to permit dynamic loading of @samp{lib.so.V(shr.o)} without the need + to specify the version number via @code{dlopen("libNAME.so(shr.o)", + RTLD_MEMBER)} + @end itemize +@end table + +As long as static library creation is enabled, upon: +@table @code +@item --with-aix-soname=svr4 + A @code{Static Archive Library} is created: + @itemize @bullet + @item using the @samp{libNAME.a} filename scheme + @item with all the @code{Static Object} files as archive members, which + @itemize @minus + @item are used for static linking + @end itemize + @end itemize +@end table + +While the aix-soname=@samp{svr4} option does not create @code{Shared Object} +files as members of unversioned @code{Archive Library} files any more, package +managers still are responsible to +@uref{./specific.html#TransferAixShobj,,transfer} @code{Shared Object} files +found as member of a previously installed unversioned @code{Archive Library} +file into the newly installed @code{Archive Library} file with the same +filename. + +@emph{WARNING:} Creating @code{Shared Object} files with @code{Runtime Linking} +enabled may bloat the TOC, eventually leading to @code{TOC overflow} errors, +requiring the use of either the @option{-Wl,-bbigtoc} linker flag (seen to +break with the @code{GDB} debugger) or some of the TOC-related compiler flags, +@ifnothtml +@xref{RS/6000 and PowerPC Options,, RS/6000 and PowerPC Options, gcc, +Using the GNU Compiler Collection (GCC)}. +@end ifnothtml +@ifhtml +see ``RS/6000 and PowerPC Options'' in the main manual. +@end ifhtml + +@option{--with-aix-soname} is currently supported by @samp{libgcc_s} only, so +this option is still experimental and not for normal use yet. + +Default is the traditional behaviour @option{--with-aix-soname=@samp{aix}}. + @item --enable-languages=@var{lang1},@var{lang2},@dots{} Specify that only a particular subset of compilers and their runtime libraries should be built. For a list of valid values for @@ -3878,6 +3986,7 @@ APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1). It also requires a fix for another AIX Assembler bug and a co-dependent AIX Archiver fix referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1) +@anchor{TransferAixShobj} @samp{libstdc++} in GCC 3.4 increments the major version number of the shared object and GCC installation places the @file{libstdc++.a} shared library in a common location which will overwrite the and GCC @@ -3908,6 +4017,11 @@ Archive the runtime-only shared object in the GCC 3.4 % ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5 @end smallexample +Eventually, the +@uref{./configure.html#WithAixSoname,,@option{--with-aix-soname=svr4}} +configure option may drop the need for this procedure for libraries that +support it. + Linking executables and shared libraries may produce warnings of duplicate symbols. The assembly files generated by GCC for AIX always have included multiple symbol definitions for certain global variable diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index ce8c1f7..2ee1476 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -1,3 +1,10 @@ +2015-12-09 Michael Haubenwallner <michael.haubenwallner@ssi-schaefer.com> + + * Makefile.in (with_aix_soname): Define. + * config/rs6000/t-slibgcc-aix: Act upon --with-aix-soname option. + * configure.ac: Accept --with-aix-soname=aix|svr4|both option. + * configure: Recreate. + 2014-12-05 Olivier Hainque <hainque@adacore.com> * unwind-dw2.c (DWARF_REG_TO_UNWIND_COLUMN): Remove default def, diff --git a/libgcc/config/rs6000/t-slibgcc-aix b/libgcc/config/rs6000/t-slibgcc-aix index 288c2c9a..2de307e 100644 --- a/libgcc/config/rs6000/t-slibgcc-aix +++ b/libgcc/config/rs6000/t-slibgcc-aix @@ -16,24 +16,74 @@ # along with GCC; see the file COPYING3. If not see # <http://www.gnu.org/licenses/>. -# Build a shared libgcc library. -SHLIB_EXT = .a -SHLIB_LINK = $(CC) $(LIBGCC2_CFLAGS) -shared -nodefaultlibs \ - -Wl,-bE:@shlib_map_file@ -o @multilib_dir@/shr.o \ - @multilib_flags@ @shlib_objs@ -lc \ - `case @multilib_dir@ in \ - *pthread*) echo -L$(TARGET_SYSTEM_ROOT)/usr/lib/threads -lpthreads -lc_r $(TARGET_SYSTEM_ROOT)/usr/lib/libc.a ;; \ - *) echo -lc ;; esac` ; \ - rm -f @multilib_dir@/tmp-@shlib_base_name@.a ; \ - $(AR_CREATE_FOR_TARGET) @multilib_dir@/tmp-@shlib_base_name@.a \ - @multilib_dir@/shr.o ; \ - mv @multilib_dir@/tmp-@shlib_base_name@.a \ - @multilib_dir@/@shlib_base_name@.a ; \ - rm -f @multilib_dir@/shr.o +# Build a shared libgcc library according to --with-aix-soname selection: +# aix-soname=aix: +# libgcc_s.a(shr.o) # traditional (-bnortl) +# +# aix-soname=both: +# libgcc_s.a(shr.o) # traditional (-bnortl) +# libgcc_s.so.1(shrXX.o,shrXX.imp) # the SONAME (-G) +# libgcc_s.so -> libgcc_s.so.1 # the symlink +# +# aix-soname=svr4: +# libgcc_s.so.1(shrXX.o,shrXX.imp) # the SONAME (-G) +# libgcc_s.so -> libgcc_s.so.1 # the symlink +SHLIB_EXT_aix = .a +SHLIB_EXT_both = .so +SHLIB_EXT_svr4 = .so +SHLIB_EXT = $(SHLIB_EXT_$(with_aix_soname)) +SHLIB_SOVERSION = 1 +SHLIB_SONAME = @shlib_base_name@.so.$(SHLIB_SOVERSION) +SHLIB_LINK = \ + if test svr4 != $(with_aix_soname) ; then \ + $(CC) $(LIBGCC2_CFLAGS) -shared -Wl,-bnortl -nodefaultlibs \ + -Wl,-bE:@shlib_map_file@ -o @multilib_dir@/shr.o \ + @multilib_flags@ @shlib_objs@ -lc \ + `case @multilib_dir@ in \ + *pthread*) echo -L$(TARGET_SYSTEM_ROOT)/usr/lib/threads -lpthreads -lc_r $(TARGET_SYSTEM_ROOT)/usr/lib/libc.a ;; \ + *) echo -lc ;; esac` ; \ + rm -f @multilib_dir@/tmp-@shlib_base_name@.a ; \ + $(AR_CREATE_FOR_TARGET) @multilib_dir@/tmp-@shlib_base_name@.a \ + @multilib_dir@/shr.o ; \ + mv @multilib_dir@/tmp-@shlib_base_name@.a \ + @multilib_dir@/@shlib_base_name@.a ; \ + rm -f @multilib_dir@/shr.o ; \ + fi ; \ + if test aix != $(with_aix_soname) ; then \ + case @multilib_dir@ in *64*) shr='shr_64' ;; *) shr='shr' ;; esac ; \ + $(CC) $(LIBGCC2_CFLAGS) -shared -Wl,-G -nodefaultlibs \ + -Wl,-bE:@shlib_map_file@ -o @multilib_dir@/$$shr.o \ + @multilib_flags@ @shlib_objs@ -lc \ + `case @multilib_dir@ in \ + *pthread*) echo -L$(TARGET_SYSTEM_ROOT)/usr/lib/threads -lpthreads -lc_r $(TARGET_SYSTEM_ROOT)/usr/lib/libc.a ;; \ + *) echo -lc ;; esac` ; \ + $(STRIP_FOR_TARGET) -X32_64 -e @multilib_dir@/$$shr.o ; \ + { echo "\#! $(SHLIB_SONAME)($$shr.o)" ; \ + case @multilib_dir@ in *64*) echo '\# 64' ;; *) echo '\# 32' ;; esac ; \ + cat @shlib_map_file@ ; \ + } > @multilib_dir@/$$shr.imp ; \ + rm -f @multilib_dir@/tmp-$(SHLIB_SONAME) ; \ + $(AR_CREATE_FOR_TARGET) @multilib_dir@/tmp-$(SHLIB_SONAME) \ + @multilib_dir@/$$shr.imp @multilib_dir@/$$shr.o ; \ + mv @multilib_dir@/tmp-$(SHLIB_SONAME) \ + @multilib_dir@/$(SHLIB_SONAME) ; \ + rm -f @multilib_dir@/@shlib_base_name@.so ; \ + $(LN_S) $(SHLIB_SONAME) @multilib_dir@/@shlib_base_name@.so ; \ + rm -f @multilib_dir@/$$shr.imp @multilib_dir@/$$shr.o ; \ + fi SHLIB_INSTALL = \ $(mkinstalldirs) $(DESTDIR)$(slibdir)@shlib_slibdir_qual@; \ - $(INSTALL_DATA) @multilib_dir@/@shlib_base_name@.a \ - $(DESTDIR)$(slibdir)@shlib_slibdir_qual@/ + if test svr4 != $(with_aix_soname) ; then \ + $(INSTALL_DATA) @multilib_dir@/@shlib_base_name@.a \ + $(DESTDIR)$(slibdir)@shlib_slibdir_qual@/ ; \ + fi ; \ + if test aix != $(with_aix_soname) ; then \ + $(INSTALL_DATA) @multilib_dir@/$(SHLIB_SONAME) \ + $(DESTDIR)$(slibdir)@shlib_slibdir_qual@/ ; \ + rm -f $(DESTDIR)$(slibdir)@shlib_slibdir_qual@/@shlib_base_name@.so ; \ + $(LN_S) $(SHLIB_SONAME) \ + $(DESTDIR)$(slibdir)@shlib_slibdir_qual@/@shlib_base_name@.so ; \ + fi SHLIB_LIBS = -lc `case @multilib_dir@ in *pthread*) echo -lpthread ;; esac` SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk SHLIB_MAPFILES = libgcc-std.ver diff --git a/libgcc/configure b/libgcc/configure index 8792465..8480dd1 100644 --- a/libgcc/configure +++ b/libgcc/configure @@ -610,6 +610,7 @@ build_os build_vendor build_cpu build +with_aix_soname enable_vtable_verify enable_shared libgcc_topdir @@ -659,6 +660,7 @@ with_cross_host with_ld enable_shared enable_vtable_verify +with_aix_soname enable_version_specific_runtime_libs with_slibdir enable_maintainer_mode @@ -1317,6 +1319,9 @@ Optional Packages: --with-target-subdir=SUBDIR Configuring in a subdirectory for target --with-cross-host=HOST Configuring with a cross compiler --with-ld arrange to use the specified ld (full pathname) + --with-aix-soname=aix|svr4|both + shared library versioning (aka "SONAME") variant to + provide on AIX --with-slibdir=DIR shared libraries in DIR LIBDIR --with-build-libsubdir=DIR Directory where to find libraries for build system --with-system-libunwind use installed libunwind @@ -2166,6 +2171,29 @@ fi + +# Check whether --with-aix-soname was given. +if test "${with_aix_soname+set}" = set; then : + withval=$with_aix_soname; case "${host}:${enable_shared}" in + power*-*-aix[5-9]*:yes) + { $as_echo "$as_me:${as_lineno-$LINENO}: checking which variant of shared library versioning to provide for shared libgcc" >&5 +$as_echo_n "checking which variant of shared library versioning to provide for shared libgcc... " >&6; } + case ${withval} in + aix|svr4|both) ;; + *) as_fn_error "Unknown argument to --with-aix-soname" "$LINENO" 5;; + esac + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $withval" >&5 +$as_echo "$withval" >&6; } + ;; + *) with_aix_soname=aix ;; + esac + +else + with_aix_soname=aix +fi + + + # Make sure we can run config.sub. $SHELL "$ac_aux_dir/config.sub" sun4 >/dev/null 2>&1 || as_fn_error "cannot run $SHELL $ac_aux_dir/config.sub" "$LINENO" 5 diff --git a/libgcc/configure.ac b/libgcc/configure.ac index ab9c556..23d5f35 100644 --- a/libgcc/configure.ac +++ b/libgcc/configure.ac @@ -76,6 +76,23 @@ AC_ARG_ENABLE(vtable-verify, [enable_vtable_verify=no]) AC_SUBST(enable_vtable_verify) +AC_ARG_WITH(aix-soname, +[AS_HELP_STRING([--with-aix-soname=aix|svr4|both], + [shared library versioning (aka "SONAME") variant to provide on AIX])], +[case "${host}:${enable_shared}" in + power*-*-aix[[5-9]]*:yes) + AC_MSG_CHECKING([which variant of shared library versioning to provide for shared libgcc]) + case ${withval} in + aix|svr4|both) ;; + *) AC_MSG_ERROR([Unknown argument to --with-aix-soname]);; + esac + AC_MSG_RESULT($withval) + ;; + *) with_aix_soname=aix ;; + esac +], [with_aix_soname=aix]) +AC_SUBST(with_aix_soname) + GCC_PICFLAG AC_SUBST(PICFLAG) |