From patchwork Mon Jun 25 16:19:26 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Klose X-Patchwork-Id: 167161 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) by ozlabs.org (Postfix) with SMTP id 6BB04B6FA3 for ; Tue, 26 Jun 2012 02:21:31 +1000 (EST) Comment: DKIM? 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Myers" CC: gcc-patches@gcc.gnu.org, Paolo Bonzini Subject: Re: [patch] support for multiarch systems References: <4E501045.40102@ubuntu.com> <4FE85BE3.2080008@ubuntu.com> In-Reply-To: Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Delivered-To: mailing list gcc-patches@gcc.gnu.org On 25.06.2012 15:56, Joseph S. Myers wrote: > On Mon, 25 Jun 2012, Matthias Klose wrote: > >> Please find attached the patch updated for trunk 20120625, x86 only, tested on >> x86-linux-gnu, KFreeBSD and the Hurd. > > This patch appears to include changes to config.gcc for other targets, not > mentioned in your ChangeLog entries. Please resubmit without those > changes, and submit them separately with their own rationale if needed. my mistake, removed these bits now again. 2012-06-25 Matthias Klose * doc/invoke.texi: Document -print-multiarch. * doc/install.texi: Document --enable-multiarch. * doc/fragments.texi: Document MULTILIB_OSDIRNAMES, MULTIARCH_DIRNAME. * configure.ac: Add --enable-multiarch option. * configure.in: Regenerate. * Makefile.in (s-mlib): Pass MULTIARCH_DIRNAME to genmultilib. enable_multiarch, with_float: New macros. if_multiarch: New macro, define in terms of enable_multiarch. * genmultilib: Add new argument for the multiarch name. * gcc.c (multiarch_dir): Define. (for_each_path): Search for multiarch suffixes. (driver_handle_option): Handle multiarch option. (do_spec_1): Pass -imultiarch if defined. (main): Print multiarch. (set_multilib_dir): Separate multilib and multiarch names from multilib_select. (print_multilib_info): Ignore multiarch names in multilib_select. * incpath.c (add_standard_paths): Search the multiarch include dirs. * cppdeault.h (default_include): Document multiarch in multilib member. * cppdefault.c: [LOCAL_INCLUDE_DIR, STANDARD_INCLUDE_DIR] Add an include directory for multiarch directories. * common.opt: New options --print-multiarch and -imultilib. * config.gcc: Add tmake fragments to tmake_file ( i386/t-kfreebsd for i[34567]86-*-kfreebsd*-gnu and x86_64-*-kfreebsd*-gnu, i386/t-gnu for i[34567]86-*-gnu*). * config/i386/t-kfreebsd: Add multiarch names in MULTILIB_OSDIRNAMES, define MULTIARCH_DIRNAME. * config/i386/t-linux64: Likewise. * config/i386/t-linux: Define MULTIARCH_DIRNAME. * config/i386/t-gnu: Likewise. Index: configure.ac =================================================================== --- configure.ac (revision 188931) +++ configure.ac (working copy) @@ -623,6 +623,21 @@ [], [enable_multilib=yes]) AC_SUBST(enable_multilib) +# Determine whether or not multiarch is enabled. +AC_ARG_ENABLE(multiarch, +[AS_HELP_STRING([--enable-multiarch], + [enable support for multiarch paths])], +[case "${withval}" in +yes|no|auto-detect) enable_multiarch=$withval;; +*) AC_MSG_ERROR(bad value ${withval} given for --enable-multiarch option) ;; +esac], [enable_multiarch=auto-detect]) +AC_MSG_CHECKING(for multiarch configuration) +AC_SUBST(enable_multiarch) +AC_MSG_RESULT($enable_multiarch) + +# needed for setting the multiarch name on ARM +AC_SUBST(with_float) + # Enable __cxa_atexit for C++. AC_ARG_ENABLE(__cxa_atexit, [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])], Index: cppdefault.c =================================================================== --- cppdefault.c (revision 188931) +++ cppdefault.c (working copy) @@ -63,6 +63,7 @@ #endif #ifdef LOCAL_INCLUDE_DIR /* /usr/local/include comes before the fixincluded header files. */ + { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 }, { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 }, #endif #ifdef PREFIX_INCLUDE_DIR @@ -90,6 +91,7 @@ #endif #ifdef NATIVE_SYSTEM_HEADER_DIR /* /usr/include comes dead last. */ + { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 2 }, { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 0 }, #endif { 0, 0, 0, 0, 0, 0 } Index: cppdefault.h =================================================================== --- cppdefault.h (revision 188931) +++ cppdefault.h (working copy) @@ -43,9 +43,11 @@ C++. */ const char add_sysroot; /* FNAME should be prefixed by cpp_SYSROOT. */ - const char multilib; /* FNAME should have the multilib path - specified with -imultilib - appended. */ + const char multilib; /* FNAME should have appended + - the multilib path specified with -imultilib + when 1 is passed, + - the multiarch path specified with + -imultiarch, when 2 is passed. */ }; extern const struct default_include cpp_include_defaults[]; Index: Makefile.in =================================================================== --- Makefile.in (revision 188931) +++ Makefile.in (working copy) @@ -350,6 +350,17 @@ enable_plugin = @enable_plugin@ +# Multiarch support +enable_multiarch = @enable_multiarch@ +with_float = @with_float@ +ifeq ($(enable_multiarch),yes) + if_multiarch = $(1) +else ifeq ($(enable_multiarch),auto-detect) + if_multiarch = $(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib/*/crti.o),$(1)) +else + if_multiarch = +endif + CPPLIB = ../libcpp/libcpp.a CPPINC = -I$(srcdir)/../libcpp/include @@ -1845,10 +1856,11 @@ "$(MULTILIB_EXCLUSIONS)" \ "$(MULTILIB_OSDIRNAMES)" \ "$(MULTILIB_REQUIRED)" \ + "$(MULTIARCH_DIRNAME)" \ "@enable_multilib@" \ > tmp-mlib.h; \ else \ - $(SHELL) $(srcdir)/genmultilib '' '' '' '' '' '' '' '' no\ + $(SHELL) $(srcdir)/genmultilib '' '' '' '' '' '' '' '' "$(MULTIARCH_DIRNAME)" no \ > tmp-mlib.h; \ fi $(SHELL) $(srcdir)/../move-if-change tmp-mlib.h multilib.h Index: genmultilib =================================================================== --- genmultilib (revision 188931) +++ genmultilib (working copy) @@ -84,6 +84,8 @@ # This argument can be used together with MULTILIB_EXCEPTIONS and will take # effect after the MULTILIB_EXCEPTIONS. +# The optional eight argument is the multiarch name. + # The last option should be "yes" if multilibs are enabled. If it is not # "yes", all GCC multilib dir names will be ".". @@ -133,7 +135,8 @@ exclusions=$6 osdirnames=$7 multilib_required=$8 -enable_multilib=$9 +multiarch=$9 +enable_multilib=${10} echo "static const char *const multilib_raw[] = {" @@ -261,6 +264,9 @@ # names. toosdirnames= defaultosdirname= +if [ -n "${multiarch}" ]; then + defaultosdirname=::${multiarch} +fi if [ -n "${osdirnames}" ]; then set x ${osdirnames} shift @@ -268,6 +274,9 @@ case "$1" in .=*) defaultosdirname=`echo $1 | sed 's|^.=|:|'` + if [ -n "${multiarch}" ]; then + defaultosdirname=${defaultosdirname}:${multiarch} + fi shift ;; *=*) @@ -353,13 +362,13 @@ dirout=`echo ${combo} | sed -e 's/=/-/g'` fi # Remove the leading and trailing slashes. - dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'` + dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'` # Use the OS directory names rather than the option names. if [ -n "${toosdirnames}" ]; then osdirout=`echo ${combo} | sed ${toosdirnames}` # Remove the leading and trailing slashes. - osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/$||g'` + osdirout=`echo ${osdirout} | sed -e 's|^/||' -e 's|/*:/*|:|' -e 's|/$||g'` if [ "x${enable_multilib}" != xyes ]; then dirout=".:${osdirout}" disable_multilib=yes Index: gcc.c =================================================================== --- gcc.c (revision 188931) +++ gcc.c (working copy) @@ -1154,6 +1154,11 @@ set_multilib_dir based on the compilation options. */ static const char *multilib_os_dir; + +/* Subdirectory to use for locating libraries in multiarch conventions. Set by + set_multilib_dir based on the compilation options. */ + +static const char *multiarch_dir; /* Structure to keep track of the specs that have been defined so far. These are accessed using %(specname) in a compiler or link @@ -2081,6 +2086,7 @@ struct prefix_list *pl; const char *multi_dir = NULL; const char *multi_os_dir = NULL; + const char *multiarch_suffix = NULL; const char *multi_suffix; const char *just_multi_suffix; char *path = NULL; @@ -2098,11 +2104,14 @@ } if (do_multi && multilib_os_dir && strcmp (multilib_os_dir, ".") != 0) multi_os_dir = concat (multilib_os_dir, dir_separator_str, NULL); + if (multiarch_dir) + multiarch_suffix = concat (multiarch_dir, dir_separator_str, NULL); while (1) { size_t multi_dir_len = 0; size_t multi_os_dir_len = 0; + size_t multiarch_len = 0; size_t suffix_len; size_t just_suffix_len; size_t len; @@ -2111,16 +2120,15 @@ multi_dir_len = strlen (multi_dir); if (multi_os_dir) multi_os_dir_len = strlen (multi_os_dir); + if (multiarch_suffix) + multiarch_len = strlen (multiarch_suffix); suffix_len = strlen (multi_suffix); just_suffix_len = strlen (just_multi_suffix); if (path == NULL) { len = paths->max_len + extra_space + 1; - if (suffix_len > multi_os_dir_len) - len += suffix_len; - else - len += multi_os_dir_len; + len += MAX (MAX (suffix_len, multi_os_dir_len), multiarch_len); path = XNEWVEC (char, len); } @@ -2149,6 +2157,16 @@ break; } + /* Now try the multiarch path. */ + if (!skip_multi_dir + && !pl->require_machine_suffix && multiarch_dir) + { + memcpy (path + len, multiarch_suffix, multiarch_len + 1); + ret = callback (path, callback_info); + if (ret) + break; + } + /* Now try the base path. */ if (!pl->require_machine_suffix && !(pl->os_multilib ? skip_multi_os_dir : skip_multi_dir)) @@ -2974,6 +2992,9 @@ fputs (_(" -print-libgcc-file-name Display the name of the compiler's companion library\n"), stdout); fputs (_(" -print-file-name= Display the full path to library \n"), stdout); fputs (_(" -print-prog-name= Display the full path to compiler component \n"), stdout); + fputs (_("\ + -print-multiarch Display the target's normalized GNU triplet, used as\n\ + a component in the library path\n"), stdout); fputs (_(" -print-multi-directory Display the root directory for versions of libgcc\n"), stdout); fputs (_("\ -print-multi-lib Display the mapping between command line options and\n\ @@ -3257,6 +3278,7 @@ case OPT_print_multi_directory: case OPT_print_sysroot: case OPT_print_multi_os_directory: + case OPT_print_multiarch: case OPT_print_sysroot_headers_suffix: case OPT_time: case OPT_wrapper: @@ -4910,6 +4932,15 @@ do_spec_1 (" ", 0, NULL); } + if (multiarch_dir) + { + do_spec_1 ("-imultiarch", 1, NULL); + /* Make this a separate argument. */ + do_spec_1 (" ", 0, NULL); + do_spec_1 (multiarch_dir, 1, NULL); + do_spec_1 (" ", 0, NULL); + } + if (gcc_exec_prefix) { do_spec_1 ("-iprefix", 1, NULL); @@ -6575,6 +6606,15 @@ return (0); } + if (print_multiarch) + { + if (multiarch_dir == NULL) + printf ("\n"); + else + printf ("%s\n", multiarch_dir); + return (0); + } + if (print_sysroot) { if (target_system_root) @@ -7558,10 +7598,26 @@ q++; if (q < end) { - char *new_multilib_os_dir = XNEWVEC (char, end - q); + const char *q2 = q + 1; + char *new_multilib_os_dir; + + while (q2 < end && *q2 != ':') + q2++; + if (*q2 == ':') + end = q2; + new_multilib_os_dir = XNEWVEC (char, end - q); memcpy (new_multilib_os_dir, q + 1, end - q - 1); new_multilib_os_dir[end - q - 1] = '\0'; - multilib_os_dir = new_multilib_os_dir; + multilib_os_dir = *new_multilib_os_dir ? new_multilib_os_dir : "."; + + end = this_path + this_path_len; + if (q2 < end && *q2 == ':') + { + char *new_multiarch_dir = XNEWVEC (char, end - q2); + memcpy (new_multiarch_dir, q2 + 1, end - q2 - 1); + new_multiarch_dir[end - q2 - 1] = '\0'; + multiarch_dir = new_multiarch_dir; + } break; } } @@ -7623,7 +7679,7 @@ /* When --disable-multilib was used but target defines MULTILIB_OSDIRNAMES, entries starting with .: are there just to find multilib_os_dir, so skip them from output. */ - if (this_path[0] == '.' && this_path[1] == ':') + if (this_path[0] == '.' && this_path[1] == ':' && this_path[2] != ':') skip = 1; /* Check for matches with the multilib_exclusions. We don't bother Index: config/i386/t-kfreebsd =================================================================== --- config/i386/t-kfreebsd (revision 0) +++ config/i386/t-kfreebsd (revision 0) @@ -0,0 +1,5 @@ +MULTIARCH_DIRNAME = $(call if_multiarch,i386-kfreebsd-gnu) + +# MULTILIB_OSDIRNAMES are set in t-linux64. +KFREEBSD_OS = $(filter kfreebsd%, $(word 3, $(subst -, ,$(target)))) +MULTILIB_OSDIRNAMES := $(subst linux,$(KFREEBSD_OS),$(MULTILIB_OSDIRNAMES)) Index: config/i386/t-linux =================================================================== --- config/i386/t-linux (revision 0) +++ config/i386/t-linux (revision 0) @@ -0,0 +1 @@ +MULTIARCH_DIRNAME = $(call if_multiarch,i386-linux-gnu) Index: config/i386/t-gnu =================================================================== --- config/i386/t-gnu (revision 0) +++ config/i386/t-gnu (revision 0) @@ -0,0 +1 @@ +MULTIARCH_DIRNAME = $(call if_multiarch,i386-gnu) Index: config/i386/t-linux64 =================================================================== --- config/i386/t-linux64 (revision 188931) +++ config/i386/t-linux64 (working copy) @@ -34,6 +34,6 @@ comma=, MULTILIB_OPTIONS = $(subst $(comma),/,$(TM_MULTILIB_CONFIG)) MULTILIB_DIRNAMES = $(patsubst m%, %, $(subst /, ,$(MULTILIB_OPTIONS))) -MULTILIB_OSDIRNAMES = m64=../lib64 -MULTILIB_OSDIRNAMES+= m32=$(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib) +MULTILIB_OSDIRNAMES = m64=../lib64$(call if_multiarch,:x86_64-linux-gnu) +MULTILIB_OSDIRNAMES+= m32=$(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)$(call if_multiarch,:i386-linux-gnu) MULTILIB_OSDIRNAMES+= mx32=../libx32 Index: common.opt =================================================================== --- common.opt (revision 188931) +++ common.opt (working copy) @@ -345,6 +345,9 @@ -print-multi-os-directory Driver Alias(print-multi-os-directory) +-print-multiarch +Driver Alias(print-multiarch) + -print-prog-name Driver Separate Alias(print-prog-name=) @@ -2298,6 +2301,10 @@ Common Joined Var(plugindir_string) Init(0) -iplugindir= Set to be the default plugin directory +imultiarch +Common Joined Separate RejectDriver Var(imultiarch) Init(0) +-imultiarch Set to be the multiarch include subdirectory + l Driver Joined Separate @@ -2354,6 +2361,9 @@ print-multi-os-directory Driver Var(print_multi_os_directory) + +print-multiarch +Driver Var(print_multiarch) print-prog-name= Driver JoinedOrMissing Var(print_prog_name) Index: doc/install.texi =================================================================== --- doc/install.texi (revision 188931) +++ doc/install.texi (working copy) @@ -1038,6 +1038,11 @@ conventions, etc.@: should not be built. The default is to build a predefined set of them. +@item --enable-multiarch +Specify wether to enable or disable multiarch support. The default is +to detect for glibc start files in a multiarch location, and enable it +if the files are found. + Some targets provide finer-grained control over which multilibs are built (e.g., @option{--disable-softfloat}): @table @code Index: doc/fragments.texi =================================================================== --- doc/fragments.texi (revision 188931) +++ doc/fragments.texi (working copy) @@ -93,6 +93,12 @@ default value will be @code{MULTILIB_OPTIONS}, with all slashes treated as spaces. +@code{MULTILIB_DIRNAMES} describes the multilib directories using GCC +conventions and is applied to directories that are part of the GCC +installation. When multilib-enabled, the compiler will add a +subdirectory of the form @var{prefix}/@var{multilib} before each +directory in the search path for libraries and crt files. + For example, if @code{MULTILIB_OPTIONS} is set to @samp{m68000/m68020 msoft-float}, then the default value of @code{MULTILIB_DIRNAMES} is @samp{m68000 m68020 msoft-float}. You may specify a different value if @@ -152,6 +158,60 @@ of options to be used for all builds. If you set this, you should probably set @code{CRTSTUFF_T_CFLAGS} to a dash followed by it. +@findex MULTILIB_OSDIRNAMES +@item MULTILIB_OSDIRNAMES +If @code{MULTILIB_OPTIONS} is used, this variable specifies +a list of subdirectory names, that are used to modify the search +path depending on the chosen multilib. Unlike @code{MULTILIB_DIRNAMES}, +@code{MULTILIB_OSDIRNAMES} describes the multilib directories using +operating systems conventions, and is applied to the directories such as +@code{lib} or those in the @env{LIBRARY_PATH} environment variable. +The format is either the same as of +@code{MULTILIB_DIRNAMES}, or a set of mappings. When it is the same +as @code{MULTILIB_DIRNAMES}, it describes the multilib directories +using operating system conventions, rather than GCC conventions. When it is a set +of mappings of the form @var{gccdir}=@var{osdir}, the left side gives +the GCC convention and the right gives the equivalent OS defined +location. If the @var{osdir} part begins with a @samp{!}, +GCC will not search in the non-multilib directory and use +exclusively the multilib directory. Otherwise, the compiler will +examine the search path for libraries and crt files twice; the first +time it will add @var{multilib} to each directory in the search path, +the second it will not. + +For configurations that support both multilib and multiarch, +@code{MULTILIB_OSDIRNAMES} also encodes the multiarch name, thus +subsuming @code{MULTIARCH_DIRNAME}. The multiarch name is appended to +each directory name, separated by a colon (e.g. +@samp{../lib32:i386-linux-gnu}). + +Each multiarch subdirectory will be searched before the corresponding OS +multilib directory, for example @samp{/lib/i386-linux-gnu} before +@samp{/lib/../lib32}. The multiarch name will also be used to modify the +system header search path, as explained for @code{MULTIARCH_DIRNAME}. + +@findex MULTIARCH_DIRNAME +@item MULTIARCH_DIRNAME +This variable specifies the multiarch name for configurations that are +multiarch-enabled but not multilibbed configurations. + +The multiarch name is used to augment the search path for libraries, crt +files and system header files with additional locations. The compiler +will add a multiarch subdirectory of the form +@var{prefix}/@var{multiarch} before each directory in the library and +crt search path. It will also add two directories +@code{LOCAL_INCLUDE_DIR}/@var{multiarch} and +@code{NATIVE_SYSTEM_HEADER_DIR}/@var{multiarch}) to the system header +search path, respectively before @code{LOCAL_INCLUDE_DIR} and +@code{NATIVE_SYSTEM_HEADER_DIR}. + +@code{MULTIARCH_DIRNAME} is not used for configurations that support +both multilib and multiarch. In that case, multiarch names are encoded +in @code{MULTILIB_OSDIRNAMES} instead. + +More documentation about multiarch can be found at +@uref{http://wiki.debian.org/Multiarch}. + @findex SPECS @item SPECS Unfortunately, setting @code{MULTILIB_EXTRA_OPTS} is not enough, since Index: doc/invoke.texi =================================================================== --- doc/invoke.texi (revision 188931) +++ doc/invoke.texi (working copy) @@ -6111,6 +6111,11 @@ @file{../lib32}, or if OS libraries are present in @file{lib/@var{subdir}} subdirectories it prints e.g.@: @file{amd64}, @file{sparcv9} or @file{ev6}. +@item -print-multiarch +@opindex print-multiarch +Print the path to OS libraries for the selected multiarch, +relative to some @file{lib} subdirectory. + @item -print-prog-name=@var{program} @opindex print-prog-name Like @option{-print-file-name}, but searches for a program such as @samp{cpp}. Index: config.gcc =================================================================== --- config.gcc (revision 188931) +++ config.gcc (working copy) @@ -3445,10 +3449,14 @@ i[34567]86-*-darwin* | x86_64-*-darwin*) ;; - i[34567]86-*-linux* | x86_64-*-linux* | \ - i[34567]86-*-kfreebsd*-gnu | x86_64-*-kfreebsd*-gnu | \ - i[34567]86-*-gnu*) + i[34567]86-*-linux* | x86_64-*-linux*) ;; + i[34567]86-*-kfreebsd*-gnu | x86_64-*-kfreebsd*-gnu) + tmake_file="${tmake_file} i386/t-linux i386/t-kfreebsd" + ;; + i[34567]86-*-gnu*) + tmake_file="${tmake_file} i386/t-linux i386/t-gnu" + ;; i[34567]86-*-solaris2* | x86_64-*-solaris2.1[0-9]*) ;; i[34567]86-*-cygwin* | i[34567]86-*-mingw* | x86_64-*-mingw*) Index: incpath.c =================================================================== --- incpath.c (revision 188931) +++ incpath.c (working copy) @@ -150,8 +150,14 @@ if (!filename_ncmp (p->fname, cpp_GCC_INCLUDE_DIR, len)) { char *str = concat (iprefix, p->fname + len, NULL); - if (p->multilib && imultilib) + if (p->multilib == 1 && imultilib) str = concat (str, dir_separator_str, imultilib, NULL); + else if (p->multilib == 2) + { + if (!imultiarch) + continue; + str = concat (str, dir_separator_str, imultiarch, NULL); + } add_path (str, SYSTEM, p->cxx_aware, false); } } @@ -203,8 +209,14 @@ else str = update_path (p->fname, p->component); - if (p->multilib && imultilib) + if (p->multilib == 1 && imultilib) str = concat (str, dir_separator_str, imultilib, NULL); + else if (p->multilib == 2) + { + if (!imultiarch) + continue; + str = concat (str, dir_separator_str, imultiarch, NULL); + } add_path (str, SYSTEM, p->cxx_aware, false); }