[1/3] librust: Add libproc_macro and build system

Message ID 20230920120311.14892-1-arthur.cohen@embecosm.com
State Accepted
Headers
Series [1/3] librust: Add libproc_macro and build system |

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Context Check Description
snail/gcc-patch-check success Github commit url

Commit Message

Arthur Cohen Sept. 20, 2023, 11:59 a.m. UTC
  From: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

This patch series adds the build system changes to allow the Rust
frontend to develop and distribute its own libraries. The first library
we have been working on is the `proc_macro` library, comprised of a C++
library as well as a user-facing Rust library.

Follow up commits containing the actual library code will be committed.
Should I submit patches to the MAINTAINERS file to allow Philip and I to
commit to this folder without first approval?

This first commit adds a simple `libgrust` folder with on top of which the
full library will be built.

All the best,

Arthur

-----

Add some dummy files in libproc_macro along with it's build system.

ChangeLog:

	* libgrust/Makefile.am: New file.
	* libgrust/configure.ac: New file.
	* libgrust/libproc_macro/Makefile.am: New file.
	* libgrust/libproc_macro/proc_macro.cc: New file.
	* libgrust/libproc_macro/proc_macro.h: New file.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
---
 libgrust/Makefile.am                 |  68 ++++++++++++++++
 libgrust/configure.ac                | 113 +++++++++++++++++++++++++++
 libgrust/libproc_macro/Makefile.am   |  58 ++++++++++++++
 libgrust/libproc_macro/proc_macro.cc |   7 ++
 libgrust/libproc_macro/proc_macro.h  |   7 ++
 5 files changed, 253 insertions(+)
 create mode 100644 libgrust/Makefile.am
 create mode 100644 libgrust/configure.ac
 create mode 100644 libgrust/libproc_macro/Makefile.am
 create mode 100644 libgrust/libproc_macro/proc_macro.cc
 create mode 100644 libgrust/libproc_macro/proc_macro.h
  

Comments

Richard Biener Sept. 26, 2023, 11:40 a.m. UTC | #1
On Wed, Sep 20, 2023 at 2:04 PM Arthur Cohen <arthur.cohen@embecosm.com> wrote:
>
> From: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
>
> This patch series adds the build system changes to allow the Rust
> frontend to develop and distribute its own libraries. The first library
> we have been working on is the `proc_macro` library, comprised of a C++
> library as well as a user-facing Rust library.
>
> Follow up commits containing the actual library code will be committed.
> Should I submit patches to the MAINTAINERS file to allow Philip and I to
> commit to this folder without first approval?

I think the Rust language frontend maintainership implicitly includes
the rust runtime libraries.

> This first commit adds a simple `libgrust` folder with on top of which the
> full library will be built.

OK.

> All the best,
>
> Arthur
>
> -----
>
> Add some dummy files in libproc_macro along with it's build system.
>
> ChangeLog:
>
>         * libgrust/Makefile.am: New file.
>         * libgrust/configure.ac: New file.
>         * libgrust/libproc_macro/Makefile.am: New file.
>         * libgrust/libproc_macro/proc_macro.cc: New file.
>         * libgrust/libproc_macro/proc_macro.h: New file.
>
> Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
> ---
>  libgrust/Makefile.am                 |  68 ++++++++++++++++
>  libgrust/configure.ac                | 113 +++++++++++++++++++++++++++
>  libgrust/libproc_macro/Makefile.am   |  58 ++++++++++++++
>  libgrust/libproc_macro/proc_macro.cc |   7 ++
>  libgrust/libproc_macro/proc_macro.h  |   7 ++
>  5 files changed, 253 insertions(+)
>  create mode 100644 libgrust/Makefile.am
>  create mode 100644 libgrust/configure.ac
>  create mode 100644 libgrust/libproc_macro/Makefile.am
>  create mode 100644 libgrust/libproc_macro/proc_macro.cc
>  create mode 100644 libgrust/libproc_macro/proc_macro.h
>
> diff --git a/libgrust/Makefile.am b/libgrust/Makefile.am
> new file mode 100644
> index 00000000000..8e5274922c5
> --- /dev/null
> +++ b/libgrust/Makefile.am
> @@ -0,0 +1,68 @@
> +AUTOMAKE_OPTIONS = 1.8 foreign
> +
> +SUFFIXES = .c .rs .def .o .lo .a
> +
> +ACLOCAL_AMFLAGS = -I . -I .. -I ../config
> +
> +AM_CFLAGS = -I $(srcdir)/../libgcc -I $(MULTIBUILDTOP)../../gcc/include
> +
> +TOP_GCCDIR := $(shell cd $(top_srcdir) && cd .. && pwd)
> +
> +GCC_DIR = $(TOP_GCCDIR)/gcc
> +RUST_SRC = $(GCC_DIR)/rust
> +
> +toolexeclibdir=@toolexeclibdir@
> +toolexecdir=@toolexecdir@
> +
> +SUBDIRS = libproc_macro
> +
> +RUST_BUILDDIR := $(shell pwd)
> +
> +# Work around what appears to be a GNU make bug handling MAKEFLAGS
> +# values defined in terms of make variables, as is the case for CC and
> +# friends when we are called from the top level Makefile.
> +AM_MAKEFLAGS = \
> +        "GCC_DIR=$(GCC_DIR)" \
> +        "RUST_SRC=$(RUST_SRC)" \
> +       "AR_FLAGS=$(AR_FLAGS)" \
> +       "CC_FOR_BUILD=$(CC_FOR_BUILD)" \
> +       "CC_FOR_TARGET=$(CC_FOR_TARGET)" \
> +       "RUST_FOR_TARGET=$(RUST_FOR_TARGET)" \
> +       "CFLAGS=$(CFLAGS)" \
> +       "CXXFLAGS=$(CXXFLAGS)" \
> +       "CFLAGS_FOR_BUILD=$(CFLAGS_FOR_BUILD)" \
> +       "CFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET)" \
> +       "INSTALL=$(INSTALL)" \
> +       "INSTALL_DATA=$(INSTALL_DATA)" \
> +       "INSTALL_PROGRAM=$(INSTALL_PROGRAM)" \
> +       "INSTALL_SCRIPT=$(INSTALL_SCRIPT)" \
> +       "LDFLAGS=$(LDFLAGS)" \
> +       "LIBCFLAGS=$(LIBCFLAGS)" \
> +       "LIBCFLAGS_FOR_TARGET=$(LIBCFLAGS_FOR_TARGET)" \
> +       "MAKE=$(MAKE)" \
> +       "MAKEINFO=$(MAKEINFO) $(MAKEINFOFLAGS)" \
> +       "PICFLAG=$(PICFLAG)" \
> +       "PICFLAG_FOR_TARGET=$(PICFLAG_FOR_TARGET)" \
> +       "SHELL=$(SHELL)" \
> +       "RUNTESTFLAGS=$(RUNTESTFLAGS)" \
> +       "exec_prefix=$(exec_prefix)" \
> +       "infodir=$(infodir)" \
> +       "libdir=$(libdir)" \
> +       "includedir=$(includedir)" \
> +       "prefix=$(prefix)" \
> +       "tooldir=$(tooldir)" \
> +       "gxx_include_dir=$(gxx_include_dir)" \
> +       "AR=$(AR)" \
> +       "AS=$(AS)" \
> +       "LD=$(LD)" \
> +       "RANLIB=$(RANLIB)" \
> +       "NM=$(NM)" \
> +       "NM_FOR_BUILD=$(NM_FOR_BUILD)" \
> +       "NM_FOR_TARGET=$(NM_FOR_TARGET)" \
> +       "DESTDIR=$(DESTDIR)" \
> +       "WERROR=$(WERROR)" \
> +        "TARGET_LIB_PATH=$(TARGET_LIB_PATH)" \
> +        "TARGET_LIB_PATH_librust=$(TARGET_LIB_PATH_librust)" \
> +       "LIBTOOL=$(RUST_BUILDDIR)/libtool"
> +
> +include $(top_srcdir)/../multilib.am
> diff --git a/libgrust/configure.ac b/libgrust/configure.ac
> new file mode 100644
> index 00000000000..7aed489a643
> --- /dev/null
> +++ b/libgrust/configure.ac
> @@ -0,0 +1,113 @@
> +AC_INIT([libgrust], version-unused,,librust)
> +AC_CONFIG_SRCDIR(Makefile.am)
> +AC_CONFIG_FILES([Makefile])
> +
> +# AM_ENABLE_MULTILIB(, ..)
> +
> +# Do not delete or change the following two lines.  For why, see
> +# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
> +AC_CANONICAL_SYSTEM
> +target_alias=${target_alias-$host_alias}
> +AC_SUBST(target_alias)
> +
> +# Automake should never attempt to rebuild configure
> +AM_MAINTAINER_MODE
> +
> +AM_INIT_AUTOMAKE([1.15.1 foreign no-dist -Wall])
> +
> +# Make sure we don't test executables when making cross-tools.
> +GCC_NO_EXECUTABLES
> +
> +
> +# Add the ability to change LIBTOOL directory
> +GCC_WITH_TOOLEXECLIBDIR
> +
> +# Use system specific extensions
> +AC_USE_SYSTEM_EXTENSIONS
> +
> +
> +# Checks for header files.
> +AC_HEADER_STDC
> +AC_HEADER_SYS_WAIT
> +AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h \
> +                 time.h sys/stat.h wchar.h)
> +
> +# Check for tools
> +AM_PROG_AR
> +AC_PROG_CC
> +AC_PROG_CXX
> +AM_PROG_AS
> +AC_PROG_MAKE_SET
> +AC_PROG_INSTALL
> +
> +# Enable libtool
> +LT_INIT
> +
> +# target_noncanonical variables...
> +AC_CANONICAL_HOST
> +ACX_NONCANONICAL_HOST
> +ACX_NONCANONICAL_TARGET
> +GCC_TOPLEV_SUBDIRS
> +
> +AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
> +AC_ARG_ENABLE(version-specific-runtime-libs,
> +[  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
> +[case "$enableval" in
> + yes) version_specific_libs=yes ;;
> + no)  version_specific_libs=no ;;
> + *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
> + esac],
> +[version_specific_libs=no])
> +AC_MSG_RESULT($version_specific_libs)
> +
> +toolexecdir=no
> +toolexeclibdir=no
> +
> +# Calculate toolexeclibdir
> +# Also toolexecdir, though it's only used in toolexeclibdir
> +case ${version_specific_libs} in
> +  yes)
> +    # Need the gcc compiler version to know where to install libraries
> +    # and header files if --enable-version-specific-runtime-libs option
> +    # is selected.
> +    toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
> +    toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
> +    ;;
> +  no)
> +    if test -n "$with_cross_host" &&
> +       test x"$with_cross_host" != x"no"; then
> +      # Install a library built with a cross compiler in tooldir, not libdir.
> +      toolexecdir='$(exec_prefix)/$(target_noncanonical)'
> +      toolexeclibdir='$(toolexecdir)/lib'
> +    else
> +      toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
> +      toolexeclibdir='$(libdir)'
> +    fi
> +    multi_os_directory=`$CC -print-multi-os-directory`
> +    case $multi_os_directory in
> +      .) ;; # Avoid trailing /.
> +      *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
> +    esac
> +    ;;
> +esac
> +
> +AC_SUBST(toolexecdir)
> +AC_SUBST(toolexeclibdir)
> +
> +
> +AC_CONFIG_FILES(AC_FOREACH([DIR], [libproc_macro], [DIR/Makefile ]),
> + [ cat > vpsed$$ << \_EOF
> +s!`test -f '$<' || echo '$(srcdir)/'`!!
> +_EOF
> +   sed -f vpsed$$ $ac_file > tmp$$
> +   mv tmp$$ $ac_file
> +   rm vpsed$$
> +   echo 'MULTISUBDIR =' >> $ac_file
> +   ml_norecursion=yes
> +   AS_UNSET([ml_norecursion])
> +])
> +
> +
> +AC_MSG_NOTICE([librust has been configured.])
> +
> +AC_OUTPUT
> diff --git a/libgrust/libproc_macro/Makefile.am b/libgrust/libproc_macro/Makefile.am
> new file mode 100644
> index 00000000000..1e61d12e506
> --- /dev/null
> +++ b/libgrust/libproc_macro/Makefile.am
> @@ -0,0 +1,58 @@
> +SUFFIXES = .cc .o .a .lo .la
> +
> +ACLOCAL_AMFLAGS = -I .. -I ../../config
> +
> +toolexeclibdir=@toolexeclibdir@
> +toolexecdir=@toolexecdir@
> +
> +# Work around what appears to be a GNU make bug handling MAKEFLAGS
> +# values defined in terms of make variables, as is the case for CC and
> +# friends when we are called from the top level Makefile.
> +AM_MAKEFLAGS = \
> +       "AR_FLAGS=$(AR_FLAGS)" \
> +       "CC_FOR_BUILD=$(CC_FOR_BUILD)" \
> +       "CC_FOR_TARGET=$(CC_FOR_TARGET)" \
> +       "CFLAGS=$(CFLAGS)" \
> +       "CXXFLAGS=$(CXXFLAGS)" \
> +       "CFLAGS_FOR_BUILD=$(CFLAGS_FOR_BUILD)" \
> +       "CFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET)" \
> +       "INSTALL=$(INSTALL)" \
> +       "INSTALL_DATA=$(INSTALL_DATA)" \
> +       "INSTALL_PROGRAM=$(INSTALL_PROGRAM)" \
> +       "INSTALL_SCRIPT=$(INSTALL_SCRIPT)" \
> +       "LDFLAGS=$(LDFLAGS)" \
> +       "LIBCFLAGS=$(LIBCFLAGS)" \
> +       "LIBCFLAGS_FOR_TARGET=$(LIBCFLAGS_FOR_TARGET)" \
> +       "MAKE=$(MAKE)" \
> +       "MAKEINFO=$(MAKEINFO) $(MAKEINFOFLAGS)" \
> +       "PICFLAG=$(PICFLAG)" \
> +       "PICFLAG_FOR_TARGET=$(PICFLAG_FOR_TARGET)" \
> +       "SHELL=$(SHELL)" \
> +       "RUNTESTFLAGS=$(RUNTESTFLAGS)" \
> +       "exec_prefix=$(exec_prefix)" \
> +       "infodir=$(infodir)" \
> +       "libdir=$(libdir)" \
> +       "includedir=$(includedir)" \
> +       "prefix=$(prefix)" \
> +       "tooldir=$(tooldir)" \
> +       "gxx_include_dir=$(gxx_include_dir)" \
> +       "AR=$(AR)" \
> +       "AS=$(AS)" \
> +       "LD=$(LD)" \
> +       "RANLIB=$(RANLIB)" \
> +       "NM=$(NM)" \
> +       "NM_FOR_BUILD=$(NM_FOR_BUILD)" \
> +       "NM_FOR_TARGET=$(NM_FOR_TARGET)" \
> +       "DESTDIR=$(DESTDIR)" \
> +       "WERROR=$(WERROR)" \
> +        "TARGET_LIB_PATH=$(TARGET_LIB_PATH)" \
> +        "TARGET_LIB_PATH_libgm2=$(TARGET_LIB_PATH_libgm2)"
> +
> +toolexeclib_LTLIBRARIES = libproc_macro.la
> +
> +libproc_macro_la_SOURCES = \
> +       proc_macro.cc
> +
> +include_HEADERS = \
> +       proc_macro.h
> +
> diff --git a/libgrust/libproc_macro/proc_macro.cc b/libgrust/libproc_macro/proc_macro.cc
> new file mode 100644
> index 00000000000..d13276294aa
> --- /dev/null
> +++ b/libgrust/libproc_macro/proc_macro.cc
> @@ -0,0 +1,7 @@
> +#include "proc_macro.h"
> +
> +int
> +test ()
> +{
> +  return 0;
> +}
> diff --git a/libgrust/libproc_macro/proc_macro.h b/libgrust/libproc_macro/proc_macro.h
> new file mode 100644
> index 00000000000..2c96b3de685
> --- /dev/null
> +++ b/libgrust/libproc_macro/proc_macro.h
> @@ -0,0 +1,7 @@
> +#ifndef PROC_MACRO_H
> +#define PROC_MACRO_H
> +
> +int
> +test ();
> +
> +#endif /* ! PROC_MACRO_H */
> --
> 2.42.0
>
  
Thomas Schwinge Sept. 26, 2023, 10:42 p.m. UTC | #2
Hi!

On 2023-09-26T13:40:40+0200, Richard Biener <richard.guenther@gmail.com> wrote:
> On Wed, Sep 20, 2023 at 2:04 PM Arthur Cohen <arthur.cohen@embecosm.com> wrote:
>>
>> From: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
>>
>> This patch series adds the build system changes to allow the Rust
>> frontend to develop and distribute its own libraries. The first library
>> we have been working on is the `proc_macro` library, comprised of a C++
>> library as well as a user-facing Rust library.
>>
>> Follow up commits containing the actual library code will be committed.
>> Should I submit patches to the MAINTAINERS file to allow Philip and I to
>> commit to this folder without first approval?
>
> I think the Rust language frontend maintainership implicitly includes
> the rust runtime libraries.

Would seem reasonable -- but to make things explicit, may also add in
'MAINTAINERS', 'Various Maintainers' an entry like:

    libgrust            All Rust front end maintainers

..., or similar?  Or, explicitly duplicate for all Rust front end
maintainers.  (We don't seem to be consistent with respect to that.)

>> This first commit adds a simple `libgrust` folder with on top of which the
>> full library will be built.
>
> OK.

Before pushing this, don't you first have to set up an empty
'libgrust/ChangeLog', like
commit 24ff0b3e0c41e3997fb4c11736b8a412afbaadf3
"Add stub 'gcc/rust/ChangeLog'", for example?

..., and adjust
'contrib/gcc-changelog/git_commit.py:default_changelog_locations', like
commit 325529e21e81fbc3561d2568cb7e8a26296e5b2f
"Prepare 'contrib/gcc-changelog/git_commit.py' for GCC/Rust", for
example?

..., and then replace your 'libgrust/[...]' Git commit log entries:

>> Add some dummy files in libproc_macro along with it's build system.
>>
>> ChangeLog:
>>
>>         * libgrust/Makefile.am: New file.
>>         * libgrust/configure.ac: New file.
>>         * libgrust/libproc_macro/Makefile.am: New file.
>>         * libgrust/libproc_macro/proc_macro.cc: New file.
>>         * libgrust/libproc_macro/proc_macro.h: New file.
>>
>> Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

... with:

    libgrust/
    * Makefile.am: New file.
    [...]

(Or similar syntax.)  That way, the "nightly" auto-updater will use
'libgrust/ChangeLog' instead of the top-level 'ChangeLog'.

(I hope I got all that right.)


Please also update 'contrib/gcc_update:files_and_dependencies' for all
'libgrust/' generated files' dependencies.


Grüße
 Thomas


>> ---
>>  libgrust/Makefile.am                 |  68 ++++++++++++++++
>>  libgrust/configure.ac                | 113 +++++++++++++++++++++++++++
>>  libgrust/libproc_macro/Makefile.am   |  58 ++++++++++++++
>>  libgrust/libproc_macro/proc_macro.cc |   7 ++
>>  libgrust/libproc_macro/proc_macro.h  |   7 ++
>>  5 files changed, 253 insertions(+)
>>  create mode 100644 libgrust/Makefile.am
>>  create mode 100644 libgrust/configure.ac
>>  create mode 100644 libgrust/libproc_macro/Makefile.am
>>  create mode 100644 libgrust/libproc_macro/proc_macro.cc
>>  create mode 100644 libgrust/libproc_macro/proc_macro.h
>>
>> diff --git a/libgrust/Makefile.am b/libgrust/Makefile.am
>> new file mode 100644
>> index 00000000000..8e5274922c5
>> --- /dev/null
>> +++ b/libgrust/Makefile.am
>> @@ -0,0 +1,68 @@
>> +AUTOMAKE_OPTIONS = 1.8 foreign
>> +
>> +SUFFIXES = .c .rs .def .o .lo .a
>> +
>> +ACLOCAL_AMFLAGS = -I . -I .. -I ../config
>> +
>> +AM_CFLAGS = -I $(srcdir)/../libgcc -I $(MULTIBUILDTOP)../../gcc/include
>> +
>> +TOP_GCCDIR := $(shell cd $(top_srcdir) && cd .. && pwd)
>> +
>> +GCC_DIR = $(TOP_GCCDIR)/gcc
>> +RUST_SRC = $(GCC_DIR)/rust
>> +
>> +toolexeclibdir=@toolexeclibdir@
>> +toolexecdir=@toolexecdir@
>> +
>> +SUBDIRS = libproc_macro
>> +
>> +RUST_BUILDDIR := $(shell pwd)
>> +
>> +# Work around what appears to be a GNU make bug handling MAKEFLAGS
>> +# values defined in terms of make variables, as is the case for CC and
>> +# friends when we are called from the top level Makefile.
>> +AM_MAKEFLAGS = \
>> +        "GCC_DIR=$(GCC_DIR)" \
>> +        "RUST_SRC=$(RUST_SRC)" \
>> +       "AR_FLAGS=$(AR_FLAGS)" \
>> +       "CC_FOR_BUILD=$(CC_FOR_BUILD)" \
>> +       "CC_FOR_TARGET=$(CC_FOR_TARGET)" \
>> +       "RUST_FOR_TARGET=$(RUST_FOR_TARGET)" \
>> +       "CFLAGS=$(CFLAGS)" \
>> +       "CXXFLAGS=$(CXXFLAGS)" \
>> +       "CFLAGS_FOR_BUILD=$(CFLAGS_FOR_BUILD)" \
>> +       "CFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET)" \
>> +       "INSTALL=$(INSTALL)" \
>> +       "INSTALL_DATA=$(INSTALL_DATA)" \
>> +       "INSTALL_PROGRAM=$(INSTALL_PROGRAM)" \
>> +       "INSTALL_SCRIPT=$(INSTALL_SCRIPT)" \
>> +       "LDFLAGS=$(LDFLAGS)" \
>> +       "LIBCFLAGS=$(LIBCFLAGS)" \
>> +       "LIBCFLAGS_FOR_TARGET=$(LIBCFLAGS_FOR_TARGET)" \
>> +       "MAKE=$(MAKE)" \
>> +       "MAKEINFO=$(MAKEINFO) $(MAKEINFOFLAGS)" \
>> +       "PICFLAG=$(PICFLAG)" \
>> +       "PICFLAG_FOR_TARGET=$(PICFLAG_FOR_TARGET)" \
>> +       "SHELL=$(SHELL)" \
>> +       "RUNTESTFLAGS=$(RUNTESTFLAGS)" \
>> +       "exec_prefix=$(exec_prefix)" \
>> +       "infodir=$(infodir)" \
>> +       "libdir=$(libdir)" \
>> +       "includedir=$(includedir)" \
>> +       "prefix=$(prefix)" \
>> +       "tooldir=$(tooldir)" \
>> +       "gxx_include_dir=$(gxx_include_dir)" \
>> +       "AR=$(AR)" \
>> +       "AS=$(AS)" \
>> +       "LD=$(LD)" \
>> +       "RANLIB=$(RANLIB)" \
>> +       "NM=$(NM)" \
>> +       "NM_FOR_BUILD=$(NM_FOR_BUILD)" \
>> +       "NM_FOR_TARGET=$(NM_FOR_TARGET)" \
>> +       "DESTDIR=$(DESTDIR)" \
>> +       "WERROR=$(WERROR)" \
>> +        "TARGET_LIB_PATH=$(TARGET_LIB_PATH)" \
>> +        "TARGET_LIB_PATH_librust=$(TARGET_LIB_PATH_librust)" \
>> +       "LIBTOOL=$(RUST_BUILDDIR)/libtool"
>> +
>> +include $(top_srcdir)/../multilib.am
>> diff --git a/libgrust/configure.ac b/libgrust/configure.ac
>> new file mode 100644
>> index 00000000000..7aed489a643
>> --- /dev/null
>> +++ b/libgrust/configure.ac
>> @@ -0,0 +1,113 @@
>> +AC_INIT([libgrust], version-unused,,librust)
>> +AC_CONFIG_SRCDIR(Makefile.am)
>> +AC_CONFIG_FILES([Makefile])
>> +
>> +# AM_ENABLE_MULTILIB(, ..)
>> +
>> +# Do not delete or change the following two lines.  For why, see
>> +# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
>> +AC_CANONICAL_SYSTEM
>> +target_alias=${target_alias-$host_alias}
>> +AC_SUBST(target_alias)
>> +
>> +# Automake should never attempt to rebuild configure
>> +AM_MAINTAINER_MODE
>> +
>> +AM_INIT_AUTOMAKE([1.15.1 foreign no-dist -Wall])
>> +
>> +# Make sure we don't test executables when making cross-tools.
>> +GCC_NO_EXECUTABLES
>> +
>> +
>> +# Add the ability to change LIBTOOL directory
>> +GCC_WITH_TOOLEXECLIBDIR
>> +
>> +# Use system specific extensions
>> +AC_USE_SYSTEM_EXTENSIONS
>> +
>> +
>> +# Checks for header files.
>> +AC_HEADER_STDC
>> +AC_HEADER_SYS_WAIT
>> +AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h \
>> +                 time.h sys/stat.h wchar.h)
>> +
>> +# Check for tools
>> +AM_PROG_AR
>> +AC_PROG_CC
>> +AC_PROG_CXX
>> +AM_PROG_AS
>> +AC_PROG_MAKE_SET
>> +AC_PROG_INSTALL
>> +
>> +# Enable libtool
>> +LT_INIT
>> +
>> +# target_noncanonical variables...
>> +AC_CANONICAL_HOST
>> +ACX_NONCANONICAL_HOST
>> +ACX_NONCANONICAL_TARGET
>> +GCC_TOPLEV_SUBDIRS
>> +
>> +AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
>> +AC_ARG_ENABLE(version-specific-runtime-libs,
>> +[  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
>> +[case "$enableval" in
>> + yes) version_specific_libs=yes ;;
>> + no)  version_specific_libs=no ;;
>> + *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
>> + esac],
>> +[version_specific_libs=no])
>> +AC_MSG_RESULT($version_specific_libs)
>> +
>> +toolexecdir=no
>> +toolexeclibdir=no
>> +
>> +# Calculate toolexeclibdir
>> +# Also toolexecdir, though it's only used in toolexeclibdir
>> +case ${version_specific_libs} in
>> +  yes)
>> +    # Need the gcc compiler version to know where to install libraries
>> +    # and header files if --enable-version-specific-runtime-libs option
>> +    # is selected.
>> +    toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
>> +    toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
>> +    ;;
>> +  no)
>> +    if test -n "$with_cross_host" &&
>> +       test x"$with_cross_host" != x"no"; then
>> +      # Install a library built with a cross compiler in tooldir, not libdir.
>> +      toolexecdir='$(exec_prefix)/$(target_noncanonical)'
>> +      toolexeclibdir='$(toolexecdir)/lib'
>> +    else
>> +      toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
>> +      toolexeclibdir='$(libdir)'
>> +    fi
>> +    multi_os_directory=`$CC -print-multi-os-directory`
>> +    case $multi_os_directory in
>> +      .) ;; # Avoid trailing /.
>> +      *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
>> +    esac
>> +    ;;
>> +esac
>> +
>> +AC_SUBST(toolexecdir)
>> +AC_SUBST(toolexeclibdir)
>> +
>> +
>> +AC_CONFIG_FILES(AC_FOREACH([DIR], [libproc_macro], [DIR/Makefile ]),
>> + [ cat > vpsed$$ << \_EOF
>> +s!`test -f '$<' || echo '$(srcdir)/'`!!
>> +_EOF
>> +   sed -f vpsed$$ $ac_file > tmp$$
>> +   mv tmp$$ $ac_file
>> +   rm vpsed$$
>> +   echo 'MULTISUBDIR =' >> $ac_file
>> +   ml_norecursion=yes
>> +   AS_UNSET([ml_norecursion])
>> +])
>> +
>> +
>> +AC_MSG_NOTICE([librust has been configured.])
>> +
>> +AC_OUTPUT
>> diff --git a/libgrust/libproc_macro/Makefile.am b/libgrust/libproc_macro/Makefile.am
>> new file mode 100644
>> index 00000000000..1e61d12e506
>> --- /dev/null
>> +++ b/libgrust/libproc_macro/Makefile.am
>> @@ -0,0 +1,58 @@
>> +SUFFIXES = .cc .o .a .lo .la
>> +
>> +ACLOCAL_AMFLAGS = -I .. -I ../../config
>> +
>> +toolexeclibdir=@toolexeclibdir@
>> +toolexecdir=@toolexecdir@
>> +
>> +# Work around what appears to be a GNU make bug handling MAKEFLAGS
>> +# values defined in terms of make variables, as is the case for CC and
>> +# friends when we are called from the top level Makefile.
>> +AM_MAKEFLAGS = \
>> +       "AR_FLAGS=$(AR_FLAGS)" \
>> +       "CC_FOR_BUILD=$(CC_FOR_BUILD)" \
>> +       "CC_FOR_TARGET=$(CC_FOR_TARGET)" \
>> +       "CFLAGS=$(CFLAGS)" \
>> +       "CXXFLAGS=$(CXXFLAGS)" \
>> +       "CFLAGS_FOR_BUILD=$(CFLAGS_FOR_BUILD)" \
>> +       "CFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET)" \
>> +       "INSTALL=$(INSTALL)" \
>> +       "INSTALL_DATA=$(INSTALL_DATA)" \
>> +       "INSTALL_PROGRAM=$(INSTALL_PROGRAM)" \
>> +       "INSTALL_SCRIPT=$(INSTALL_SCRIPT)" \
>> +       "LDFLAGS=$(LDFLAGS)" \
>> +       "LIBCFLAGS=$(LIBCFLAGS)" \
>> +       "LIBCFLAGS_FOR_TARGET=$(LIBCFLAGS_FOR_TARGET)" \
>> +       "MAKE=$(MAKE)" \
>> +       "MAKEINFO=$(MAKEINFO) $(MAKEINFOFLAGS)" \
>> +       "PICFLAG=$(PICFLAG)" \
>> +       "PICFLAG_FOR_TARGET=$(PICFLAG_FOR_TARGET)" \
>> +       "SHELL=$(SHELL)" \
>> +       "RUNTESTFLAGS=$(RUNTESTFLAGS)" \
>> +       "exec_prefix=$(exec_prefix)" \
>> +       "infodir=$(infodir)" \
>> +       "libdir=$(libdir)" \
>> +       "includedir=$(includedir)" \
>> +       "prefix=$(prefix)" \
>> +       "tooldir=$(tooldir)" \
>> +       "gxx_include_dir=$(gxx_include_dir)" \
>> +       "AR=$(AR)" \
>> +       "AS=$(AS)" \
>> +       "LD=$(LD)" \
>> +       "RANLIB=$(RANLIB)" \
>> +       "NM=$(NM)" \
>> +       "NM_FOR_BUILD=$(NM_FOR_BUILD)" \
>> +       "NM_FOR_TARGET=$(NM_FOR_TARGET)" \
>> +       "DESTDIR=$(DESTDIR)" \
>> +       "WERROR=$(WERROR)" \
>> +        "TARGET_LIB_PATH=$(TARGET_LIB_PATH)" \
>> +        "TARGET_LIB_PATH_libgm2=$(TARGET_LIB_PATH_libgm2)"
>> +
>> +toolexeclib_LTLIBRARIES = libproc_macro.la
>> +
>> +libproc_macro_la_SOURCES = \
>> +       proc_macro.cc
>> +
>> +include_HEADERS = \
>> +       proc_macro.h
>> +
>> diff --git a/libgrust/libproc_macro/proc_macro.cc b/libgrust/libproc_macro/proc_macro.cc
>> new file mode 100644
>> index 00000000000..d13276294aa
>> --- /dev/null
>> +++ b/libgrust/libproc_macro/proc_macro.cc
>> @@ -0,0 +1,7 @@
>> +#include "proc_macro.h"
>> +
>> +int
>> +test ()
>> +{
>> +  return 0;
>> +}
>> diff --git a/libgrust/libproc_macro/proc_macro.h b/libgrust/libproc_macro/proc_macro.h
>> new file mode 100644
>> index 00000000000..2c96b3de685
>> --- /dev/null
>> +++ b/libgrust/libproc_macro/proc_macro.h
>> @@ -0,0 +1,7 @@
>> +#ifndef PROC_MACRO_H
>> +#define PROC_MACRO_H
>> +
>> +int
>> +test ();
>> +
>> +#endif /* ! PROC_MACRO_H */
>> --
>> 2.42.0
>>
-----------------
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Patch

diff --git a/libgrust/Makefile.am b/libgrust/Makefile.am
new file mode 100644
index 00000000000..8e5274922c5
--- /dev/null
+++ b/libgrust/Makefile.am
@@ -0,0 +1,68 @@ 
+AUTOMAKE_OPTIONS = 1.8 foreign
+
+SUFFIXES = .c .rs .def .o .lo .a
+
+ACLOCAL_AMFLAGS = -I . -I .. -I ../config
+
+AM_CFLAGS = -I $(srcdir)/../libgcc -I $(MULTIBUILDTOP)../../gcc/include
+
+TOP_GCCDIR := $(shell cd $(top_srcdir) && cd .. && pwd)
+
+GCC_DIR = $(TOP_GCCDIR)/gcc
+RUST_SRC = $(GCC_DIR)/rust
+
+toolexeclibdir=@toolexeclibdir@
+toolexecdir=@toolexecdir@
+
+SUBDIRS = libproc_macro
+
+RUST_BUILDDIR := $(shell pwd)
+
+# Work around what appears to be a GNU make bug handling MAKEFLAGS
+# values defined in terms of make variables, as is the case for CC and
+# friends when we are called from the top level Makefile.
+AM_MAKEFLAGS = \
+        "GCC_DIR=$(GCC_DIR)" \
+        "RUST_SRC=$(RUST_SRC)" \
+	"AR_FLAGS=$(AR_FLAGS)" \
+	"CC_FOR_BUILD=$(CC_FOR_BUILD)" \
+	"CC_FOR_TARGET=$(CC_FOR_TARGET)" \
+	"RUST_FOR_TARGET=$(RUST_FOR_TARGET)" \
+	"CFLAGS=$(CFLAGS)" \
+	"CXXFLAGS=$(CXXFLAGS)" \
+	"CFLAGS_FOR_BUILD=$(CFLAGS_FOR_BUILD)" \
+	"CFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET)" \
+	"INSTALL=$(INSTALL)" \
+	"INSTALL_DATA=$(INSTALL_DATA)" \
+	"INSTALL_PROGRAM=$(INSTALL_PROGRAM)" \
+	"INSTALL_SCRIPT=$(INSTALL_SCRIPT)" \
+	"LDFLAGS=$(LDFLAGS)" \
+	"LIBCFLAGS=$(LIBCFLAGS)" \
+	"LIBCFLAGS_FOR_TARGET=$(LIBCFLAGS_FOR_TARGET)" \
+	"MAKE=$(MAKE)" \
+	"MAKEINFO=$(MAKEINFO) $(MAKEINFOFLAGS)" \
+	"PICFLAG=$(PICFLAG)" \
+	"PICFLAG_FOR_TARGET=$(PICFLAG_FOR_TARGET)" \
+	"SHELL=$(SHELL)" \
+	"RUNTESTFLAGS=$(RUNTESTFLAGS)" \
+	"exec_prefix=$(exec_prefix)" \
+	"infodir=$(infodir)" \
+	"libdir=$(libdir)" \
+	"includedir=$(includedir)" \
+	"prefix=$(prefix)" \
+	"tooldir=$(tooldir)" \
+	"gxx_include_dir=$(gxx_include_dir)" \
+	"AR=$(AR)" \
+	"AS=$(AS)" \
+	"LD=$(LD)" \
+	"RANLIB=$(RANLIB)" \
+	"NM=$(NM)" \
+	"NM_FOR_BUILD=$(NM_FOR_BUILD)" \
+	"NM_FOR_TARGET=$(NM_FOR_TARGET)" \
+	"DESTDIR=$(DESTDIR)" \
+	"WERROR=$(WERROR)" \
+        "TARGET_LIB_PATH=$(TARGET_LIB_PATH)" \
+        "TARGET_LIB_PATH_librust=$(TARGET_LIB_PATH_librust)" \
+	"LIBTOOL=$(RUST_BUILDDIR)/libtool"
+
+include $(top_srcdir)/../multilib.am
diff --git a/libgrust/configure.ac b/libgrust/configure.ac
new file mode 100644
index 00000000000..7aed489a643
--- /dev/null
+++ b/libgrust/configure.ac
@@ -0,0 +1,113 @@ 
+AC_INIT([libgrust], version-unused,,librust)
+AC_CONFIG_SRCDIR(Makefile.am)
+AC_CONFIG_FILES([Makefile])
+
+# AM_ENABLE_MULTILIB(, ..)
+
+# Do not delete or change the following two lines.  For why, see
+# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
+AC_CANONICAL_SYSTEM
+target_alias=${target_alias-$host_alias}
+AC_SUBST(target_alias)
+
+# Automake should never attempt to rebuild configure
+AM_MAINTAINER_MODE
+
+AM_INIT_AUTOMAKE([1.15.1 foreign no-dist -Wall])
+
+# Make sure we don't test executables when making cross-tools.
+GCC_NO_EXECUTABLES
+
+
+# Add the ability to change LIBTOOL directory
+GCC_WITH_TOOLEXECLIBDIR
+
+# Use system specific extensions
+AC_USE_SYSTEM_EXTENSIONS
+
+
+# Checks for header files.
+AC_HEADER_STDC
+AC_HEADER_SYS_WAIT
+AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h \
+                 time.h sys/stat.h wchar.h)
+
+# Check for tools
+AM_PROG_AR
+AC_PROG_CC
+AC_PROG_CXX
+AM_PROG_AS
+AC_PROG_MAKE_SET
+AC_PROG_INSTALL
+
+# Enable libtool
+LT_INIT
+
+# target_noncanonical variables...
+AC_CANONICAL_HOST
+ACX_NONCANONICAL_HOST
+ACX_NONCANONICAL_TARGET
+GCC_TOPLEV_SUBDIRS
+
+AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
+AC_ARG_ENABLE(version-specific-runtime-libs,
+[  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
+[case "$enableval" in
+ yes) version_specific_libs=yes ;;
+ no)  version_specific_libs=no ;;
+ *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
+ esac],
+[version_specific_libs=no])
+AC_MSG_RESULT($version_specific_libs)
+
+toolexecdir=no
+toolexeclibdir=no
+
+# Calculate toolexeclibdir
+# Also toolexecdir, though it's only used in toolexeclibdir
+case ${version_specific_libs} in
+  yes)
+    # Need the gcc compiler version to know where to install libraries
+    # and header files if --enable-version-specific-runtime-libs option
+    # is selected.
+    toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
+    toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
+    ;;
+  no)
+    if test -n "$with_cross_host" &&
+       test x"$with_cross_host" != x"no"; then
+      # Install a library built with a cross compiler in tooldir, not libdir.
+      toolexecdir='$(exec_prefix)/$(target_noncanonical)'
+      toolexeclibdir='$(toolexecdir)/lib'
+    else
+      toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
+      toolexeclibdir='$(libdir)'
+    fi
+    multi_os_directory=`$CC -print-multi-os-directory`
+    case $multi_os_directory in
+      .) ;; # Avoid trailing /.
+      *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
+    esac
+    ;;
+esac
+
+AC_SUBST(toolexecdir)
+AC_SUBST(toolexeclibdir)
+
+
+AC_CONFIG_FILES(AC_FOREACH([DIR], [libproc_macro], [DIR/Makefile ]),
+ [ cat > vpsed$$ << \_EOF
+s!`test -f '$<' || echo '$(srcdir)/'`!!
+_EOF
+   sed -f vpsed$$ $ac_file > tmp$$
+   mv tmp$$ $ac_file
+   rm vpsed$$
+   echo 'MULTISUBDIR =' >> $ac_file
+   ml_norecursion=yes
+   AS_UNSET([ml_norecursion])
+])
+
+
+AC_MSG_NOTICE([librust has been configured.])
+
+AC_OUTPUT
diff --git a/libgrust/libproc_macro/Makefile.am b/libgrust/libproc_macro/Makefile.am
new file mode 100644
index 00000000000..1e61d12e506
--- /dev/null
+++ b/libgrust/libproc_macro/Makefile.am
@@ -0,0 +1,58 @@ 
+SUFFIXES = .cc .o .a .lo .la
+
+ACLOCAL_AMFLAGS = -I .. -I ../../config
+
+toolexeclibdir=@toolexeclibdir@
+toolexecdir=@toolexecdir@
+
+# Work around what appears to be a GNU make bug handling MAKEFLAGS
+# values defined in terms of make variables, as is the case for CC and
+# friends when we are called from the top level Makefile.
+AM_MAKEFLAGS = \
+	"AR_FLAGS=$(AR_FLAGS)" \
+	"CC_FOR_BUILD=$(CC_FOR_BUILD)" \
+	"CC_FOR_TARGET=$(CC_FOR_TARGET)" \
+	"CFLAGS=$(CFLAGS)" \
+	"CXXFLAGS=$(CXXFLAGS)" \
+	"CFLAGS_FOR_BUILD=$(CFLAGS_FOR_BUILD)" \
+	"CFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET)" \
+	"INSTALL=$(INSTALL)" \
+	"INSTALL_DATA=$(INSTALL_DATA)" \
+	"INSTALL_PROGRAM=$(INSTALL_PROGRAM)" \
+	"INSTALL_SCRIPT=$(INSTALL_SCRIPT)" \
+	"LDFLAGS=$(LDFLAGS)" \
+	"LIBCFLAGS=$(LIBCFLAGS)" \
+	"LIBCFLAGS_FOR_TARGET=$(LIBCFLAGS_FOR_TARGET)" \
+	"MAKE=$(MAKE)" \
+	"MAKEINFO=$(MAKEINFO) $(MAKEINFOFLAGS)" \
+	"PICFLAG=$(PICFLAG)" \
+	"PICFLAG_FOR_TARGET=$(PICFLAG_FOR_TARGET)" \
+	"SHELL=$(SHELL)" \
+	"RUNTESTFLAGS=$(RUNTESTFLAGS)" \
+	"exec_prefix=$(exec_prefix)" \
+	"infodir=$(infodir)" \
+	"libdir=$(libdir)" \
+	"includedir=$(includedir)" \
+	"prefix=$(prefix)" \
+	"tooldir=$(tooldir)" \
+	"gxx_include_dir=$(gxx_include_dir)" \
+	"AR=$(AR)" \
+	"AS=$(AS)" \
+	"LD=$(LD)" \
+	"RANLIB=$(RANLIB)" \
+	"NM=$(NM)" \
+	"NM_FOR_BUILD=$(NM_FOR_BUILD)" \
+	"NM_FOR_TARGET=$(NM_FOR_TARGET)" \
+	"DESTDIR=$(DESTDIR)" \
+	"WERROR=$(WERROR)" \
+        "TARGET_LIB_PATH=$(TARGET_LIB_PATH)" \
+        "TARGET_LIB_PATH_libgm2=$(TARGET_LIB_PATH_libgm2)"
+
+toolexeclib_LTLIBRARIES = libproc_macro.la
+
+libproc_macro_la_SOURCES = \
+	proc_macro.cc
+
+include_HEADERS = \
+	proc_macro.h
+
diff --git a/libgrust/libproc_macro/proc_macro.cc b/libgrust/libproc_macro/proc_macro.cc
new file mode 100644
index 00000000000..d13276294aa
--- /dev/null
+++ b/libgrust/libproc_macro/proc_macro.cc
@@ -0,0 +1,7 @@ 
+#include "proc_macro.h"
+
+int
+test ()
+{
+  return 0;
+}
diff --git a/libgrust/libproc_macro/proc_macro.h b/libgrust/libproc_macro/proc_macro.h
new file mode 100644
index 00000000000..2c96b3de685
--- /dev/null
+++ b/libgrust/libproc_macro/proc_macro.h
@@ -0,0 +1,7 @@ 
+#ifndef PROC_MACRO_H
+#define PROC_MACRO_H
+
+int
+test ();
+
+#endif /* ! PROC_MACRO_H */