From patchwork Sun Feb 5 07:10:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Packard X-Patchwork-Id: 1737649 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=Fe/cfJO2; 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 4P8gYy5FJWz23j3 for ; Sun, 5 Feb 2023 18:12:06 +1100 (AEDT) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id ADF09385482E for ; Sun, 5 Feb 2023 07:12:04 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org ADF09385482E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1675581124; bh=hTPY9KfOYVoCLYO69+9xdVXKzixQ5FgCYskEjKznk5Y=; h=To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=Fe/cfJO2ULeluuUQIqKEwtI02SLmYFFhHlaajqzFa9znRTIt3hVgCxI0/Su6zHaD5 K0qgvdM5noERZSc3Mjz5TP7B7HW9uaEWU488eQQ2JLXMHWjKAoxUL9pLtBxgTxFUyu 8ozJACxILQF0B+Eq/tn/37ZZTugad4CgcgvaJOec= 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 CD1143858C54 for ; Sun, 5 Feb 2023 07:10:46 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org CD1143858C54 Received: from localhost (localhost [127.0.0.1]) by elaine.keithp.com (Postfix) with ESMTP id D57883F33F09; Sat, 4 Feb 2023 23:10:45 -0800 (PST) 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 iBBFBFeCp84i; Sat, 4 Feb 2023 23:10:43 -0800 (PST) Received: from keithp.com (koto.keithp.com [192.168.11.2]) by elaine.keithp.com (Postfix) with ESMTPSA id EE2CC3F33F08; Sat, 4 Feb 2023 23:10:42 -0800 (PST) Received: by keithp.com (Postfix, from userid 1000) id 9C2D31E600C8; Sat, 4 Feb 2023 23:10:42 -0800 (PST) To: gcc-patches@gcc.gnu.org Cc: Keith Packard , Andrew Pinski , Kito Cheng , Richard Sandiford , Sebastian Huber Subject: [PATCH 1/3] Allow default libc to be specified to configure Date: Sat, 4 Feb 2023 23:10:34 -0800 Message-Id: <0fc05b2872263eec6df97393edb4912dcf6d3cc6.1675579641.git.keithp@keithp.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: References: <20220903060707.1622470-1-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 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 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. If an unknown --with-default-libc= value is provided, emit an error and stop. Signed-off-by: Keith Packard --- gcc/config.gcc | 48 ++++++++++++++++++++++++++++++++++++++++-------- gcc/configure.ac | 4 ++++ 2 files changed, 44 insertions(+), 8 deletions(-) diff --git a/gcc/config.gcc b/gcc/config.gcc index f0958e1c959..0679a76bebb 100644 --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -663,6 +663,8 @@ 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 \ @@ -869,16 +871,16 @@ 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 @@ -987,7 +989,8 @@ 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 @@ -1651,13 +1654,13 @@ 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="$tm_defines DEFAULT_LIBC=LIBC_UCLIBC" + default_libc=LIBC_UCLIBC default_use_cxa_atexit=no ;; *) @@ -3037,7 +3040,7 @@ powerpc*-wrs-vxworks7r*) tmake_file="${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="$extra_objs linux.o rs6000-linux.o" ;; powerpc-wrs-vxworks*) @@ -5862,3 +5865,32 @@ i[34567]86-*-* | x86_64-*-*) fi ;; esac + +case "${with_default_libc}" in +glibc) + default_libc=LIBC_GLIBC + ;; +uclibc) + default_libc=LIBC_UCLIBC + ;; +bionic) + default_libc=LIBC_BIONIC + ;; +musl) + default_libc=LIBC_MUSL + ;; +"") + ;; +*) + echo "Unknown libc in --with-default-libc=$with_default_libc" 1>&2 + exit 1 + ;; +esac + +case "$default_libc" in +"") + ;; +*) + tm_defines="$tm_defines DEFAULT_LIBC=$default_libc" + ;; +esac diff --git a/gcc/configure.ac b/gcc/configure.ac index 62bc908b991..c30e3c7ae72 100644 --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -2481,6 +2481,10 @@ 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 Sun Feb 5 07:10:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Packard X-Patchwork-Id: 1737646 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=g+6aGii8; 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 4P8gXx306Yz23r4 for ; 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Sat, 4 Feb 2023 23:10:43 -0800 (PST) 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 2CZbTYxftdt3; Sat, 4 Feb 2023 23:10:43 -0800 (PST) Received: from keithp.com (koto.keithp.com [192.168.11.2]) by elaine.keithp.com (Postfix) with ESMTPSA id F39B83F33F09; Sat, 4 Feb 2023 23:10:42 -0800 (PST) Received: by keithp.com (Postfix, from userid 1000) id A2A771E600C9; Sat, 4 Feb 2023 23:10:42 -0800 (PST) To: gcc-patches@gcc.gnu.org Cc: Keith Packard , Andrew Pinski , Kito Cheng , Richard Sandiford , Sebastian Huber Subject: [PATCH 2/3] Add newlib and picolibc as default C library choices Date: Sat, 4 Feb 2023 23:10:35 -0800 Message-Id: <7fa04bf66973de28961edeef470266caeaa348fc.1675579641.git.keithp@keithp.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: References: <20220903060707.1622470-1-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 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 Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Sender: "Gcc-patches" Signed-off-by: Keith Packard --- gcc/config.gcc | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/gcc/config.gcc b/gcc/config.gcc index 0679a76bebb..84bca8df615 100644 --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -661,7 +661,7 @@ 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="" @@ -5879,6 +5879,15 @@ bionic) musl) default_libc=LIBC_MUSL ;; +newlib) + # Newlib configurations don't set the DEFAULT_LIBC variable, so + # avoid changing those by allowing --with-default-libc=newlib but + # not actually setting the DEFAULT_LIBC variable. + default_libc= + ;; +picolibc) + default_libc=LIBC_PICOLIBC + ;; "") ;; *) From patchwork Sun Feb 5 07:10:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Packard X-Patchwork-Id: 1737648 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=KfDNxlX8; 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 4P8gYx57w4z23j3 for ; 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Sat, 4 Feb 2023 23:10:43 -0800 (PST) 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 DmTgeJ40EDfF; Sat, 4 Feb 2023 23:10:43 -0800 (PST) Received: from keithp.com (koto.keithp.com [192.168.11.2]) by elaine.keithp.com (Postfix) with ESMTPSA id 08A563F33F0B; Sat, 4 Feb 2023 23:10:43 -0800 (PST) Received: by keithp.com (Postfix, from userid 1000) id A951B1E600CC; Sat, 4 Feb 2023 23:10:42 -0800 (PST) To: gcc-patches@gcc.gnu.org Cc: Keith Packard , Andrew Pinski , Kito Cheng , Richard Sandiford , Sebastian Huber Subject: [PATCH 3/3] Add '--oslib=' option when default C library is picolibc Date: Sat, 4 Feb 2023 23:10:36 -0800 Message-Id: <266bf8d1221b5472760ee51eb292ac67a94f91b2.1675579641.git.keithp@keithp.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: References: <20220903060707.1622470-1-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, KAM_SHORT, SPF_HELO_NONE, SPF_PASS, TXREP 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 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 Signed-off-by: Keith Packard --- gcc/config.gcc | 7 +++++++ gcc/config/picolibc.h | 32 ++++++++++++++++++++++++++++++++ gcc/config/picolibc.opt | 26 ++++++++++++++++++++++++++ 3 files changed, 65 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 84bca8df615..e2863efd680 100644 --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -5903,3 +5903,10 @@ 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..144f11ebcf2 --- /dev/null +++ b/gcc/config/picolibc.h @@ -0,0 +1,32 @@ +/* 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 + . */ + +#undef LIB_SPEC +#define LIB_SPEC "--start-group -lc %{-oslib=*:-l%*} %(libgcc) --end-group" + +#undef STARTFILE_SPEC +#define STARTFILE_SPEC "crt0%O%s" + +#undef ENDFILE_SPEC +#define ENDFILE_SPEC "" 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.