diff options
Diffstat (limited to 'packages/gcc/12.4.0/experimental/0001-picolibc-Add-custom-spec-file-fragments-for-using-pi.patch')
| -rw-r--r-- | packages/gcc/12.4.0/experimental/0001-picolibc-Add-custom-spec-file-fragments-for-using-pi.patch | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/packages/gcc/12.4.0/experimental/0001-picolibc-Add-custom-spec-file-fragments-for-using-pi.patch b/packages/gcc/12.4.0/experimental/0001-picolibc-Add-custom-spec-file-fragments-for-using-pi.patch new file mode 100644 index 00000000..0c4b90b5 --- /dev/null +++ b/packages/gcc/12.4.0/experimental/0001-picolibc-Add-custom-spec-file-fragments-for-using-pi.patch @@ -0,0 +1,138 @@ +From ad485aba918ea651987c6d153c2202a3efb5a75f Mon Sep 17 00:00:00 2001 +From: Keith Packard <keithp@keithp.com> +Date: Tue, 23 Aug 2022 22:13:08 -0700 +Subject: [PATCH 9/9] picolibc: Add custom spec file fragments for using + picolibc + +The '--oslib=' option allows targets to insert an OS library after the +C library in the LIB_PATH spec file fragment. This library maps a few +POSIX APIs used by picolibc to underlying system capabilities. + +The '--crt0=' option allows targets to use an alternate crt0 in place +of the usual one as provided by Picolibc. + +For example, picolibc provides 'libsemihost' and 'crt0-semihost.o' on +various targets which maps some POSIX APIs to semihosting capabilities +and signals the semihosting environment when 'main' returns. These +would be used by specifying --oslib=semihost --crt0=semihost. + +This patch also takes advantage of the IN_GPP conditional when +building g++ to elide exception handling contents from the executable +when not linking with the g++ driver. + +Signed-off-by: Keith Packard <keithp@keithp.com> +--- + gcc/config.gcc | 7 +++++++ + gcc/config/picolibc.h | 44 +++++++++++++++++++++++++++++++++++++++++ + gcc/config/picolibc.opt | 33 +++++++++++++++++++++++++++++++ + 3 files changed, 84 insertions(+) + create mode 100644 gcc/config/picolibc.h + create mode 100644 gcc/config/picolibc.opt + +diff --git a/gcc/config.gcc b/gcc/config.gcc +index 06af4057079..94d53970ceb 100644 +--- a/gcc/config.gcc ++++ b/gcc/config.gcc +@@ -5967,3 +5967,10 @@ case "$default_libc" in + tm_defines="$tm_defines DEFAULT_LIBC=$default_libc" + ;; + esac ++ ++case "$default_libc" in ++ LIBC_PICOLIBC) ++ extra_options="${extra_options} picolibc.opt" ++ tm_file="${tm_file} picolibc.h" ++ ;; ++esac +diff --git a/gcc/config/picolibc.h b/gcc/config/picolibc.h +new file mode 100644 +index 00000000000..d1d3fc44477 +--- /dev/null ++++ b/gcc/config/picolibc.h +@@ -0,0 +1,44 @@ ++/* Configuration common to all targets running Picolibc. ++ Copyright (C) 2023 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. ++ ++ Under Section 7 of GPL version 3, you are granted additional ++ permissions described in the GCC Runtime Library Exception, version ++ 3.1, as published by the Free Software Foundation. ++ ++ You should have received a copy of the GNU General Public License and ++ a copy of the GCC Runtime Library Exception along with this program; ++ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see ++ <http://www.gnu.org/licenses/>. */ ++ ++#ifdef IN_GPP ++#define PICOLIBC_LD "picolibcpp.ld" ++#define PICOLIBC_BEGIN " crtbegin%O%s" ++#define PICOLIBC_END "crtend%O%s" ++#else ++#define PICOLIBC_LD "picolibc.ld" ++#define PICOLIBC_BEGIN "" ++#define PICOLIBC_END "" ++#endif ++ ++#undef LIB_SPEC ++#define LIB_SPEC "%{!T:-T" PICOLIBC_LD "} --start-group -lc %{-oslib=*:-l%*} %(libgcc) --end-group" ++ ++#undef STARTFILE_SPEC ++#define STARTFILE_SPEC "%{-crt0=*:crt0-%*%O%s; :crt0%O%s}" PICOLIBC_BEGIN ++ ++#undef ENDFILE_SPEC ++#define ENDFILE_SPEC PICOLIBC_END ++ ++#define EH_TABLES_CAN_BE_READ_ONLY 1 +diff --git a/gcc/config/picolibc.opt b/gcc/config/picolibc.opt +new file mode 100644 +index 00000000000..39f81c446bb +--- /dev/null ++++ b/gcc/config/picolibc.opt +@@ -0,0 +1,33 @@ ++; Processor-independent options for picolibc. ++; ++; Copyright (C) 2022 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/>. ++ ++-oslib ++Driver Separate Alias(-oslib=) ++ ++-oslib= ++Driver Joined ++Specify an OS support library to load after libc. ++ ++-crt0 ++Driver Separate Alias(-crt0=) ++ ++-crt0= ++Driver Joined ++Specify an alternate startup file. +-- +2.39.0 + |