From patchwork Wed Aug 24 18:04:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Packard X-Patchwork-Id: 1669935 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org (client-ip=2620:52:3:1:0:246e:9693:128c; helo=sourceware.org; envelope-from=gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gcc.gnu.org header.i=@gcc.gnu.org header.a=rsa-sha256 header.s=default header.b=yvrH1vCQ; dkim-atps=neutral Received: from sourceware.org (server2.sourceware.org [IPv6:2620:52:3:1:0:246e:9693:128c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4MCYtf0p62z1ygV for ; Thu, 25 Aug 2022 04:06:02 +1000 (AEST) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 30C72382CDC6 for ; Wed, 24 Aug 2022 18:05:58 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 30C72382CDC6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1661364358; bh=uLn1Rz3mf4A2S0rQapPqitT42XzLBfYd7iRMFb8hIpA=; h=To:Subject:Date:In-Reply-To:References:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=yvrH1vCQWJYzHsQOAI6MXLOwJV/gUweYte+7ATA4REW2hSotPYoO8vX1iIRfxYPVQ i09yU7EHU9xkJsTcpvTiR/fZCGFjPsfvEoj9tBDxnWiaNr6zQTDnACTXrIRJR8pNj3 Z3Z64fDbHJqwjfpIjL7hHJnA7YD070gN0/dsBDQI= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from elaine.keithp.com (home.keithp.com [63.227.221.253]) by sourceware.org (Postfix) with ESMTPS id 9ADA53839809; Wed, 24 Aug 2022 18:05:32 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 9ADA53839809 Received: from localhost (localhost [127.0.0.1]) by elaine.keithp.com (Postfix) with ESMTP id 999DE3F2FE8C; Wed, 24 Aug 2022 11:05:31 -0700 (PDT) X-Virus-Scanned: Debian amavisd-new at keithp.com Received: from elaine.keithp.com ([127.0.0.1]) by localhost (elaine.keithp.com [127.0.0.1]) (amavisd-new, port 10024) with LMTP id qfVaHE24WsGV; Wed, 24 Aug 2022 11:05:26 -0700 (PDT) Received: from keithp.com (koto.keithp.com [192.168.11.2]) by elaine.keithp.com (Postfix) with ESMTPSA id 4D8083F2FE50; Wed, 24 Aug 2022 11:05:26 -0700 (PDT) Received: by keithp.com (Postfix, from userid 1000) id 0E1EF1E601CD; Wed, 24 Aug 2022 11:05:26 -0700 (PDT) To: gcc@gcc.gnu.org Subject: [PATCH 1/3] picolibc: Allow default libc to be specified to configure Date: Wed, 24 Aug 2022 11:04:24 -0700 Message-Id: <20220824180426.820576-2-keithp@keithp.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220824180426.820576-1-keithp@keithp.com> References: <20220824180426.820576-1-keithp@keithp.com> MIME-Version: 1.0 X-Spam-Status: No, score=-10.7 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Keith Packard via Gcc-patches From: Keith Packard Reply-To: Keith Packard Cc: gcc-patches@gcc.gnu.org Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Sender: "Gcc-patches" The default C library is normally computed based on the target triplet. However, for embedded systems, it can be useful to leave the triplet alone while changing which C library is used by default. Other C libraries may still be available on the system so the compiler and can be used by specifying suitable include and library paths at build time. Signed-off-by: Keith Packard --- gcc/config.gcc | 42 ++++++++++++++++++++++++++++++++++-------- gcc/configure.ac | 4 ++++ 2 files changed, 38 insertions(+), 8 deletions(-) diff --git a/gcc/config.gcc b/gcc/config.gcc index 02f58970db0..f8b6da4f4e7 100644 --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -641,6 +641,8 @@ esac # Common C libraries. tm_defines="$tm_defines LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3 LIBC_MUSL=4" +default_libc="" + # 32-bit x86 processors supported by --with-arch=. Each processor # MUST be separated by exactly one space. x86_archs="athlon athlon-4 athlon-fx athlon-mp athlon-tbird \ @@ -847,16 +849,16 @@ case ${target} in esac case $target in *-*-*android*) - tm_defines="$tm_defines DEFAULT_LIBC=LIBC_BIONIC" + default_libc=LIBC_BIONIC ;; *-*-*uclibc* | *-*-uclinuxfdpiceabi) - tm_defines="$tm_defines DEFAULT_LIBC=LIBC_UCLIBC" + default_libc=LIBC_UCLIBC ;; *-*-*musl*) - tm_defines="$tm_defines DEFAULT_LIBC=LIBC_MUSL" + default_libc=LIBC_MUSL ;; *) - tm_defines="$tm_defines DEFAULT_LIBC=LIBC_GLIBC" + default_libc=LIBC_GLIBC ;; esac # Assume that glibc or uClibc or Bionic are being used and so __cxa_atexit @@ -949,7 +951,8 @@ case ${target} in case ${enable_threads} in "" | yes | posix) thread_file='posix' ;; esac - tm_defines="$tm_defines DEFAULT_LIBC=LIBC_UCLIBC SINGLE_LIBC" + tm_defines="$tm_defines SINGLE_LIBC" + default_libc=LIBC_UCLIBC ;; *-*-rdos*) use_gcc_stdint=wrap @@ -1606,13 +1609,13 @@ csky-*-*) case ${target} in csky-*-linux-gnu*) - tm_defines="$tm_defines DEFAULT_LIBC=LIBC_GLIBC" + default_libc=LIBC_GLIBC # Force .init_array support. The configure script cannot always # automatically detect that GAS supports it, yet we require it. gcc_cv_initfini_array=yes ;; csky-*-linux-uclibc*) - tm_defines="$tm_defines DEFAULT_LIBC=LIBC_UCLIBC" + default_libc=LIBC_UCLIBC default_use_cxa_atexit=no ;; *) @@ -3065,7 +3068,7 @@ powerpc*-wrs-vxworks7r*) tmake_file="${tmake_file} t-linux rs6000/t-linux64 rs6000/t-fprules rs6000/t-ppccomm" tmake_file="${tmake_file} rs6000/t-vxworks" - tm_defines="$tm_defines DEFAULT_LIBC=LIBC_GLIBC" + default_libc=LIBC_GLIBC extra_objs="$extra_objs linux.o rs6000-linux.o" ;; powerpc-wrs-vxworks*) @@ -5861,3 +5864,26 @@ i[34567]86-*-* | x86_64-*-*) fi ;; esac + +case "${with_default_libc}" in +glibc) + default_libc=LIBC_GLIBC + ;; +uclibc) + default_libc=LIBC_UCLIBC + ;; +bionic) + default_libc=LIBC_BIONIC + ;; +musl) + default_libc=LIBC_MUSL + ;; +esac + +case "$default_libc" in +"") + ;; +*) + tm_defines="$tm_defines DEFAULT_LIBC=$default_libc" + ;; +esac diff --git a/gcc/configure.ac b/gcc/configure.ac index 819b490d1b6..0b76613b635 100644 --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -2490,6 +2490,10 @@ if { { test x$host != x$target && test "x$with_sysroot" = x ; } || fi AC_SUBST(inhibit_libc) +AC_ARG_WITH(default-libc, + [AS_HELP_STRING([--with-default-libc], + [Use specified default C library])]) + # When building gcc with a cross-compiler, we need to adjust things so # that the generator programs are still built with the native compiler. # Also, we cannot run fixincludes. From patchwork Wed Aug 24 18:04:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Packard X-Patchwork-Id: 1669934 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org (client-ip=8.43.85.97; helo=sourceware.org; envelope-from=gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gcc.gnu.org header.i=@gcc.gnu.org header.a=rsa-sha256 header.s=default header.b=R8Y2nj26; dkim-atps=neutral Received: from sourceware.org (server2.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4MCYtV14HQz1ygV for ; 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Wed, 24 Aug 2022 11:05:26 -0700 (PDT) X-Virus-Scanned: Debian amavisd-new at keithp.com Received: from elaine.keithp.com ([127.0.0.1]) by localhost (elaine.keithp.com [127.0.0.1]) (amavisd-new, port 10024) with LMTP id Ny2s6hf7e8xr; Wed, 24 Aug 2022 11:05:26 -0700 (PDT) Received: from keithp.com (koto.keithp.com [192.168.11.2]) by elaine.keithp.com (Postfix) with ESMTPSA id 5D8633F2FE55; Wed, 24 Aug 2022 11:05:26 -0700 (PDT) Received: by keithp.com (Postfix, from userid 1000) id 10C011E601CE; Wed, 24 Aug 2022 11:05:26 -0700 (PDT) To: gcc@gcc.gnu.org Subject: [PATCH 2/3] picolibc: Add newlib and picolibc as default C library choices Date: Wed, 24 Aug 2022 11:04:25 -0700 Message-Id: <20220824180426.820576-3-keithp@keithp.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220824180426.820576-2-keithp@keithp.com> References: <20220824180426.820576-1-keithp@keithp.com> <20220824180426.820576-2-keithp@keithp.com> MIME-Version: 1.0 X-Spam-Status: No, score=-10.6 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Keith Packard via Gcc-patches From: Keith Packard Reply-To: Keith Packard Cc: gcc-patches@gcc.gnu.org Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Sender: "Gcc-patches" Signed-off-by: Keith Packard --- gcc/config.gcc | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/gcc/config.gcc b/gcc/config.gcc index f8b6da4f4e7..0aa4bd6c3dd 100644 --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -639,7 +639,7 @@ case ${target} in esac # Common C libraries. -tm_defines="$tm_defines LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3 LIBC_MUSL=4" +tm_defines="$tm_defines LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3 LIBC_MUSL=4 LIBC_NEWLIB=5 LIBC_PICOLIBC=6" default_libc="" @@ -5878,6 +5878,12 @@ bionic) musl) default_libc=LIBC_MUSL ;; +newlib) + default_libc=LIBC_NEWLIB + ;; +picolibc) + default_libc=LIBC_PICOLIBC + ;; esac case "$default_libc" in From patchwork Wed Aug 24 18:04:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Packard X-Patchwork-Id: 1669936 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org (client-ip=8.43.85.97; helo=sourceware.org; envelope-from=gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gcc.gnu.org header.i=@gcc.gnu.org header.a=rsa-sha256 header.s=default header.b=Nqz/w078; dkim-atps=neutral Received: from sourceware.org (server2.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4MCYwX3y1mz1ygV for ; 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Wed, 24 Aug 2022 11:05:32 -0700 (PDT) X-Virus-Scanned: Debian amavisd-new at keithp.com Received: from elaine.keithp.com ([127.0.0.1]) by localhost (elaine.keithp.com [127.0.0.1]) (amavisd-new, port 10024) with LMTP id CnVcd6vuuyjG; Wed, 24 Aug 2022 11:05:31 -0700 (PDT) Received: from keithp.com (koto.keithp.com [192.168.11.2]) by elaine.keithp.com (Postfix) with ESMTPSA id 705F13F2FE56; Wed, 24 Aug 2022 11:05:26 -0700 (PDT) Received: by keithp.com (Postfix, from userid 1000) id 13E291E601CF; Wed, 24 Aug 2022 11:05:26 -0700 (PDT) To: gcc@gcc.gnu.org Subject: [PATCH 3/3] picolibc: Add '--oslib=' option when default C library is picolibc Date: Wed, 24 Aug 2022 11:04:26 -0700 Message-Id: <20220824180426.820576-4-keithp@keithp.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220824180426.820576-3-keithp@keithp.com> References: <20220824180426.820576-1-keithp@keithp.com> <20220824180426.820576-2-keithp@keithp.com> <20220824180426.820576-3-keithp@keithp.com> MIME-Version: 1.0 X-Spam-Status: No, score=-10.7 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Keith Packard via Gcc-patches From: Keith Packard Reply-To: Keith Packard Cc: gcc-patches@gcc.gnu.org Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Sender: "Gcc-patches" This 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. For example, picolibc provides 'libsemihost' on various targets which maps these APIs to semihosting capabilities. This would be used with this option by specifying --oslib=semihost This patch enables --oslib= on arm, nds32, riscv and sh. Signed-off-by: Keith Packard --- gcc/config.gcc | 6 ++++++ gcc/config/arm/elf.h | 5 +++++ gcc/config/nds32/elf.h | 4 ++++ gcc/config/picolibc.opt | 26 ++++++++++++++++++++++++++ gcc/config/riscv/elf.h | 4 ++++ gcc/config/sh/embed-elf.h | 5 +++++ 6 files changed, 50 insertions(+) create mode 100644 gcc/config/picolibc.opt diff --git a/gcc/config.gcc b/gcc/config.gcc index 0aa4bd6c3dd..80740d8f04e 100644 --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -5893,3 +5893,9 @@ 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" + ;; +esac diff --git a/gcc/config/arm/elf.h b/gcc/config/arm/elf.h index 3d111433ede..d83ee4a1a8c 100644 --- a/gcc/config/arm/elf.h +++ b/gcc/config/arm/elf.h @@ -150,3 +150,8 @@ #undef L_floatundisf #endif +#if defined(DEFAULT_LIBC) && defined(LIBC_PICOLIBC) && DEFAULT_LIBC == LIBC_PICOLIBC +#undef LIB_SPEC +#define LIB_SPEC "--start-group %(libgcc) -lc %{-oslib=*:-l%*} --end-group" +#endif + diff --git a/gcc/config/nds32/elf.h b/gcc/config/nds32/elf.h index ebdc18cee2a..a956d531ef4 100644 --- a/gcc/config/nds32/elf.h +++ b/gcc/config/nds32/elf.h @@ -34,8 +34,12 @@ " %{shared:-shared}" \ NDS32_RELAX_SPEC +#if defined(DEFAULT_LIBC) && defined(LIBC_PICOLIBC) && DEFAULT_LIBC == LIBC_PICOLIBC +#define LIB_SPEC "--start-group %(libgcc) -lc %{-oslib=*:-l%*} --end-group" +#else #define LIB_SPEC \ " -lc -lgloss" +#endif #define LIBGCC_SPEC \ " -lgcc" diff --git a/gcc/config/picolibc.opt b/gcc/config/picolibc.opt new file mode 100644 index 00000000000..194b3362b03 --- /dev/null +++ b/gcc/config/picolibc.opt @@ -0,0 +1,26 @@ +; 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 +; . + +-oslib +Driver Separate Alias(-oslib=) + +-oslib= +Driver Joined +Specify an OS support library to load after libc. diff --git a/gcc/config/riscv/elf.h b/gcc/config/riscv/elf.h index f0e865d6ef4..ca906afcd52 100644 --- a/gcc/config/riscv/elf.h +++ b/gcc/config/riscv/elf.h @@ -27,7 +27,11 @@ along with GCC; see the file COPYING3. If not see /* Link against Newlib libraries, because the ELF backend assumes Newlib. Handle the circular dependence between libc and libgloss. */ #undef LIB_SPEC +#if defined(DEFAULT_LIBC) && defined(LIBC_PICOLIBC) && DEFAULT_LIBC == LIBC_PICOLIBC +#define LIB_SPEC "--start-group %(libgcc) -lc %{-oslib=*:-l%*} --end-group" +#else #define LIB_SPEC "--start-group -lc %{!specs=nosys.specs:-lgloss} --end-group" +#endif #undef STARTFILE_SPEC #define STARTFILE_SPEC "crt0%O%s crtbegin%O%s" diff --git a/gcc/config/sh/embed-elf.h b/gcc/config/sh/embed-elf.h index 21e51dd0bb9..e8605849e07 100644 --- a/gcc/config/sh/embed-elf.h +++ b/gcc/config/sh/embed-elf.h @@ -34,3 +34,8 @@ along with GCC; see the file COPYING3. If not see %{Os: -lgcc-Os-4-200} \ -lgcc \ %{!Os: -lgcc-Os-4-200}" + +#if defined(DEFAULT_LIBC) && defined(LIBC_PICOLIBC) && DEFAULT_LIBC == LIBC_PICOLIBC +#undef LIB_SPEC +#define LIB_SPEC "--start-group %(libgcc) -lc %{-oslib=*:-l%*} --end-group" +#endif