{"id":2223252,"url":"http://patchwork.ozlabs.org/api/patches/2223252/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/patch/20260414202251.3532624-3-me@manueljacob.de/","project":{"id":17,"url":"http://patchwork.ozlabs.org/api/projects/17/?format=json","name":"GNU Compiler Collection","link_name":"gcc","list_id":"gcc-patches.gcc.gnu.org","list_email":"gcc-patches@gcc.gnu.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260414202251.3532624-3-me@manueljacob.de>","list_archive_url":null,"date":"2026-04-14T20:22:51","name":"[v2,2/2] build: Set default for CPP_FOR_BUILD environment variable in all cases.","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"9da6fe71a630ac78a5571fe81f4d893775499db5","submitter":{"id":92972,"url":"http://patchwork.ozlabs.org/api/people/92972/?format=json","name":"Manuel Jacob","email":"me@manueljacob.de"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/gcc/patch/20260414202251.3532624-3-me@manueljacob.de/mbox/","series":[{"id":499892,"url":"http://patchwork.ozlabs.org/api/series/499892/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/list/?series=499892","date":"2026-04-14T20:22:49","name":"[v2,1/2] build: Preserve *_FOR_BUILD environment variables in all cases.","version":2,"mbox":"http://patchwork.ozlabs.org/series/499892/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2223252/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2223252/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","gcc-patches@gcc.gnu.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","gcc-patches@gcc.gnu.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (4096-bit key;\n unprotected) header.d=manueljacob.de header.i=@manueljacob.de\n header.a=rsa-sha256 header.s=uberspace header.b=Q1keqfma;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; 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a=rsa-sha256; d=sourceware.org; s=key;\n t=1776198179; c=relaxed/simple;\n bh=c8u4CQwgkLSPSHxBvWJQg6ESkISnclQaoS6DvqwAHek=;\n h=From:To:Subject:Date:Message-ID:MIME-Version:DKIM-Signature;\n b=pio96ZBxR+x58W104zDuSanOi8LIXrQUvsn1+1f7lTpmIlOZ/0penpCJKWjUp8weWzwXU3A0XQ7fLr3LqGfonZ9CuBR/EFe9l+sY/rRXfP6irwDzdIEpwaaJESewp4cKB+KbZhV8u13UhV2uirQbYna7sv1ROPQYCI/K2O//BEo=","ARC-Authentication-Results":"i=1; server2.sourceware.org","From":"Manuel Jacob ","To":"gcc-patches@gcc.gnu.org","Cc":"Paolo Bonzini , Nathanael Nerode ,\n Alexandre Oliva ,\n Ralf Wildenhues , Manuel Jacob ","Subject":"[PATCH v2 2/2] build: Set default for CPP_FOR_BUILD environment\n variable in all cases.","Date":"Tue, 14 Apr 2026 22:22:51 +0200","Message-ID":"<20260414202251.3532624-3-me@manueljacob.de>","X-Mailer":"git-send-email 2.53.0","In-Reply-To":"<20260414202251.3532624-1-me@manueljacob.de>","References":"<20260414202251.3532624-1-me@manueljacob.de>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-Rspamd-Bar":"-----","X-Rspamd-Report":"REPLY(-4) BAYES_HAM(-2.999999) MID_CONTAINS_FROM(1)\n MIME_GOOD(-0.1) R_MISSING_CHARSET(0.5)","X-Rspamd-Score":"-5.599999","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple;\n d=manueljacob.de; s=uberspace; h=from:to:cc:subject:date;\n bh=c8u4CQwgkLSPSHxBvWJQg6ESkISnclQaoS6DvqwAHek=;\n b=Q1keqfma+kofebJ8MR7WRu58LKcEhwoQDhnJVViGpiDjuxCpN3Nen/aeBWETWFOC72iGiyWIOY\n Ct7KO6atIVvyxRXJ0PuIckgDW5egeUDEarlmbRGTwypBrsGCLjQjCKg0JwpLDxMA3Xlmmr6gSudF\n xtajBKfNgjBZyKYcxqi4CGzhxgV6BVwK+9aG9etc7QmK/mrOhhk756iF98iczQiVSvecxLjLpnkR\n DbynAg4lIni7bBNGjy1cgdNI5zTjPuI9ETyYxEN8urGbGuZYbsZ3/k0P4/+f78AMRu07sYPbNMST\n ENVkR2u+u3Fr7LgLD0vh2RZM3kb/UENu6r9suoAK1fqmE1HoLqFBVdN4dumK3mTvJrizuaMjznJl\n CRlPUhkqvbhGQbgPE/8csYoH79livwtx67BHLLedD/XzB7BaZgae/Axe/VBgMrW6sla9lg/ZNJlF\n SWU6E3BTL2QL5YLr4Pbm87J0CPhgNtDacqwcbFM/lVG9Ldr0YllmuVp5GFUjXgbBMjcpET78Punn\n hijiiRyQCk5tpWzaldwf+UJ56+mJo0mYneiRJXgmcRRSmKIklZljbA4ay/q5x5/Cw5cZ20JixZLD\n YRo7ylPdLmg+ZV7EqKsxOQ6xx9ID9/CmSmkRZ6t981ar/dOP/17F+mCa0skn1qWYeP+UeASRo5Yr\n 8=","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"},"content":"A default was set in the `\"${build}\" != \"${host}\"` case, but not in the `\"${build}\" = \"${host}\"` case.\n\nFor a working build, this change should not make any difference. CPP_FOR_BUILD is passed to build modules as CPP. If not set, autoconf macro AC_PROG_CC infers CPP by trying various programs. First, it tries \"$CC -E\", which CPP will default to in all cases with this patch.\n\nThe following command produces the same build directory with and without the patch:\n\n./configure --build=x86_64-make_autoconf_enable_cross_compiling-linux-gnu --host=x86_64-linux-gnu\n\nThe following command produces a Makefile containing `CPP_FOR_BUILD = ` without the patch and containing `CPP_FOR_BUILD = $(CC_FOR_BUILD) -E` with the patch:\n\n./configure\n\nChangeLog:\n\n\t* configure.ac: Set default for CPP_FOR_BUILD environment variable in all cases.\n\t* configure: Regenerate.\n\nSigned-off-by: Manuel Jacob \n---\n configure | 2 +-\n configure.ac | 2 +-\n 2 files changed, 2 insertions(+), 2 deletions(-)","diff":"diff --git a/configure b/configure\nindex 9a6407d2c6f..e2150f50aac 100755\n--- a/configure\n+++ b/configure\n@@ -4318,7 +4318,6 @@ if test \"${build}\" != \"${host}\" ; then\n AR_FOR_BUILD=${AR_FOR_BUILD-ar}\n AS_FOR_BUILD=${AS_FOR_BUILD-as}\n CC_FOR_BUILD=${CC_FOR_BUILD-gcc}\n- CPP_FOR_BUILD=\"${CPP_FOR_BUILD-\\$(CC_FOR_BUILD) -E}\"\n CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}\n DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}\n DSYMUTIL_FOR_BUILD=${DSYMUTIL_FOR_BUILD-dsymutil}\n@@ -4350,6 +4349,7 @@ else\n WINDRES_FOR_BUILD=\"${WINDRES_FOR_BUILD-\\$(WINDRES)}\"\n WINDMC_FOR_BUILD=\"${WINDMC_FOR_BUILD-\\$(WINDMC)}\"\n fi\n+CPP_FOR_BUILD=\"${CPP_FOR_BUILD-\\$(CC_FOR_BUILD) -E}\"\n \n ac_ext=c\n ac_cpp='$CPP $CPPFLAGS'\ndiff --git a/configure.ac b/configure.ac\nindex 0854638e8e8..edd53b2bb42 100644\n--- a/configure.ac\n+++ b/configure.ac\n@@ -1453,7 +1453,6 @@ if test \"${build}\" != \"${host}\" ; then\n AR_FOR_BUILD=${AR_FOR_BUILD-ar}\n AS_FOR_BUILD=${AS_FOR_BUILD-as}\n CC_FOR_BUILD=${CC_FOR_BUILD-gcc}\n- CPP_FOR_BUILD=\"${CPP_FOR_BUILD-\\$(CC_FOR_BUILD) -E}\"\n CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}\n DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}\n DSYMUTIL_FOR_BUILD=${DSYMUTIL_FOR_BUILD-dsymutil}\n@@ -1485,6 +1484,7 @@ else\n WINDRES_FOR_BUILD=\"${WINDRES_FOR_BUILD-\\$(WINDRES)}\"\n WINDMC_FOR_BUILD=\"${WINDMC_FOR_BUILD-\\$(WINDMC)}\"\n fi\n+CPP_FOR_BUILD=\"${CPP_FOR_BUILD-\\$(CC_FOR_BUILD) -E}\"\n \n AC_PROG_CC_C99\n AC_PROG_CXX\n","prefixes":["v2","2/2"]}