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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug pch/9471] #pragma system_header vs. precompiled headers Date: Tue, 14 Nov 2023 22:55:12 +0000 [thread overview] Message-ID: <bug-9471-4-tWztdc1O1U@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-9471-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=9471 --- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Lewis Hyatt <lhyatt@gcc.gnu.org>: https://gcc.gnu.org/g:9938645fcf914ec2a3fa8137cf1456ad4af5f77c commit r14-5471-g9938645fcf914ec2a3fa8137cf1456ad4af5f77c Author: Lewis Hyatt <lhyatt@gmail.com> Date: Fri Nov 10 11:10:18 2023 -0500 c-family: Let libcpp know when the compilation is for a PCH [PR9471] libcpp will generate diagnostics when it encounters things in the main file that only belong in a header file, such as `#pragma once' or `#pragma GCC system_header'. But sometimes the main file is a header file that is just being compiled separately, e.g. to produce a C++ module or a PCH, in which case such diagnostics should be suppressed. libcpp already has an interface to request that, so make use of it in the C frontends to prevent libcpp from issuing unwanted diagnostics when compiling a PCH. gcc/c-family/ChangeLog: PR pch/9471 PR pch/47857 * c-opts.cc (c_common_post_options): Set cpp_opts->main_search so libcpp knows it is compiling a header file separately. gcc/testsuite/ChangeLog: PR pch/9471 PR pch/47857 * g++.dg/pch/main-file-warnings.C: New test. * g++.dg/pch/main-file-warnings.Hs: New test. * gcc.dg/pch/main-file-warnings.c: New test. * gcc.dg/pch/main-file-warnings.hs: New test.
next parent reply other threads:[~2023-11-14 22:55 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <bug-9471-4@http.gcc.gnu.org/bugzilla/> 2023-11-14 22:55 ` cvs-commit at gcc dot gnu.org [this message] 2023-11-14 22:57 ` lhyatt at gcc dot gnu.org 2024-02-11 10:30 ` pinskia at gcc dot gnu.org [not found] <bug-9471-1920@http.gcc.gnu.org/bugzilla/> 2006-12-29 4:30 ` tromey at gcc dot gnu dot org 2008-11-28 7:48 ` geoffk at gcc dot gnu dot org [not found] <20030128034601.9471.bkoz@redhat.com> 2003-08-04 4:11 ` pinskia at physics dot uc dot edu 2003-08-23 1:32 ` dhazeghi at yahoo dot com 2003-12-19 10:09 ` pinskia at gcc dot gnu dot org 2004-06-09 20:18 ` geoffk at gcc dot gnu dot org
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