ARC: Add multilib support for linux targets

Message ID 20180516194236.24690-1-abrodkin@synopsys.com
State New
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Series
  • ARC: Add multilib support for linux targets
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Commit Message

Alexey Brodkin May 16, 2018, 7:42 p.m.
We used to build baremetal (AKA Elf32) multilibbed toolchains for years
now but never made that for Linux targets since there were problems with
uClibc n multilib setup. Now with help of Crosstool-NG it is finally
possible to create uClibc-based multilibbed toolchains and so we add
relevant CPUs for multilib in case of configuration for "arc*-*-linux*".

This will be essentially useful for glibc-based multilibbbed toolchains
in the future.

gcc/
2018-05-16  Alexey Brodkin <abrodkin@synopsys.com>

        * config.gcc: Add arc/t-multilib-linux to tmake_file for
        arc*-*-linux*.
        * config/arc/t-multilib-linux: Specify MULTILIB_OPTIONS and
        MULTILIB_DIRNAMES
---
 gcc/config.gcc                  |  2 +-
 gcc/config/arc/t-multilib-linux | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 gcc/config/arc/t-multilib-linux

Comments

Andrew Burgess May 16, 2018, 9:08 p.m. | #1
* Alexey Brodkin <Alexey.Brodkin@synopsys.com> [2018-05-16 22:42:36 +0300]:

> We used to build baremetal (AKA Elf32) multilibbed toolchains for years
> now but never made that for Linux targets since there were problems with
> uClibc n multilib setup. Now with help of Crosstool-NG it is finally
> possible to create uClibc-based multilibbed toolchains and so we add
> relevant CPUs for multilib in case of configuration for "arc*-*-linux*".
> 
> This will be essentially useful for glibc-based multilibbbed toolchains
> in the future.
> 
> gcc/
> 2018-05-16  Alexey Brodkin <abrodkin@synopsys.com>
> 
>         * config.gcc: Add arc/t-multilib-linux to tmake_file for
>         arc*-*-linux*.
>         * config/arc/t-multilib-linux: Specify MULTILIB_OPTIONS and
>         MULTILIB_DIRNAMES

Looks good.

Thanks,
Andrew

> ---
>  gcc/config.gcc                  |  2 +-
>  gcc/config/arc/t-multilib-linux | 25 +++++++++++++++++++++++++
>  2 files changed, 26 insertions(+), 1 deletion(-)
>  create mode 100644 gcc/config/arc/t-multilib-linux
> 
> diff --git a/gcc/config.gcc b/gcc/config.gcc
> index a5defb0f0058..8e038a72f613 100644
> --- a/gcc/config.gcc
> +++ b/gcc/config.gcc
> @@ -1059,7 +1059,7 @@ arc*-*-elf*)
>  	;;
>  arc*-*-linux*)
>  	tm_file="arc/arc-arch.h dbxelf.h elfos.h gnu-user.h linux.h linux-android.h glibc-stdint.h arc/linux.h ${tm_file}"
> -	tmake_file="${tmake_file} arc/t-arc"
> +	tmake_file="${tmake_file} arc/t-multilib-linux arc/t-arc"
>  	extra_gcc_objs="driver-arc.o"
>  	if test "x$with_cpu" != x; then
>  		tm_defines="${tm_defines} TARGET_CPU_BUILD=PROCESSOR_$with_cpu"
> diff --git a/gcc/config/arc/t-multilib-linux b/gcc/config/arc/t-multilib-linux
> new file mode 100644
> index 000000000000..f357cfc3f926
> --- /dev/null
> +++ b/gcc/config/arc/t-multilib-linux
> @@ -0,0 +1,25 @@
> +# Copyright (C) 2018 Free Software Foundation, Inc.
> +#
> +# This file is part of GCC.
> +#
> +# GCC is free software; you can redistribute it and/or modify it under
> +# the terms of the GNU General Public License as published by the Free
> +# Software Foundation; either version 3, or (at your option) any later
> +# version.
> +#
> +# GCC 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 General Public License
> +# for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with GCC; see the file COPYING3.  If not see
> +# <http://www.gnu.org/licenses/>.
> +
> +MULTILIB_OPTIONS = mcpu=hs/mcpu=archs/mcpu=hs38/mcpu=hs38_linux/mcpu=arc700/mcpu=nps400
> +
> +MULTILIB_DIRNAMES = hs archs hs38 hs38_linux arc700 nps400
> +
> +# Aliases:
> +MULTILIB_MATCHES += mcpu?arc700=mA7
> +MULTILIB_MATCHES += mcpu?arc700=mARC700
> -- 
> 2.17.0
>
Claudiu Zissulescu May 21, 2018, 9:57 a.m. | #2
Pushed.

Thank you for your contribution,
Claudiu

Patch

diff --git a/gcc/config.gcc b/gcc/config.gcc
index a5defb0f0058..8e038a72f613 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -1059,7 +1059,7 @@  arc*-*-elf*)
 	;;
 arc*-*-linux*)
 	tm_file="arc/arc-arch.h dbxelf.h elfos.h gnu-user.h linux.h linux-android.h glibc-stdint.h arc/linux.h ${tm_file}"
-	tmake_file="${tmake_file} arc/t-arc"
+	tmake_file="${tmake_file} arc/t-multilib-linux arc/t-arc"
 	extra_gcc_objs="driver-arc.o"
 	if test "x$with_cpu" != x; then
 		tm_defines="${tm_defines} TARGET_CPU_BUILD=PROCESSOR_$with_cpu"
diff --git a/gcc/config/arc/t-multilib-linux b/gcc/config/arc/t-multilib-linux
new file mode 100644
index 000000000000..f357cfc3f926
--- /dev/null
+++ b/gcc/config/arc/t-multilib-linux
@@ -0,0 +1,25 @@ 
+# Copyright (C) 2018 Free Software Foundation, Inc.
+#
+# This file is part of GCC.
+#
+# GCC is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 3, or (at your option) any later
+# version.
+#
+# GCC 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 General Public License
+# for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3.  If not see
+# <http://www.gnu.org/licenses/>.
+
+MULTILIB_OPTIONS = mcpu=hs/mcpu=archs/mcpu=hs38/mcpu=hs38_linux/mcpu=arc700/mcpu=nps400
+
+MULTILIB_DIRNAMES = hs archs hs38 hs38_linux arc700 nps400
+
+# Aliases:
+MULTILIB_MATCHES += mcpu?arc700=mA7
+MULTILIB_MATCHES += mcpu?arc700=mARC700