From 821d56100e1110ab6a166f50819522254eb30923 Mon Sep 17 00:00:00 2001 From: Ken Matsui Date: Fri, 1 Mar 2024 22:10:55 -0800 Subject: gcc, libcpp: Add warning switch for "#pragma once in main file" [PR89808] This patch adds a warning switch for "#pragma once in main file". The warning option name is Wpragma-once-outside-header, which is the same as Clang provides. PR preprocessor/89808 gcc/c-family/ChangeLog: * c.opt (Wpragma_once_outside_header): Define new option. * c.opt.urls: Regenerate. gcc/ChangeLog: * doc/invoke.texi (Warning Options): Document -Wno-pragma-once-outside-header. libcpp/ChangeLog: * include/cpplib.h (cpp_warning_reason): Define CPP_W_PRAGMA_ONCE_OUTSIDE_HEADER. * directives.cc (do_pragma_once): Use CPP_W_PRAGMA_ONCE_OUTSIDE_HEADER. gcc/testsuite/ChangeLog: * g++.dg/warn/Wno-pragma-once-outside-header.C: New test. * g++.dg/warn/Wpragma-once-outside-header.C: New test. Signed-off-by: Ken Matsui Reviewed-by: Marek Polacek --- libcpp/include/cpplib.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'libcpp/include/cpplib.h') diff --git a/libcpp/include/cpplib.h b/libcpp/include/cpplib.h index fbddc34..bff6601 100644 --- a/libcpp/include/cpplib.h +++ b/libcpp/include/cpplib.h @@ -714,7 +714,8 @@ enum cpp_warning_reason { CPP_W_BIDIRECTIONAL, CPP_W_INVALID_UTF8, CPP_W_UNICODE, - CPP_W_HEADER_GUARD + CPP_W_HEADER_GUARD, + CPP_W_PRAGMA_ONCE_OUTSIDE_HEADER }; /* Callback for header lookup for HEADER, which is the name of a -- cgit v1.1