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From: "Valdis Klētnieks" <valdis.kletnieks@vt.edu>
To: Kees Cook <keescook@chromium.org>
Cc: linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] gcc-plugins:  fix gcc 11 indigestion with plugins...
Date: Sat, 26 Dec 2020 13:21:58 -0500	[thread overview]
Message-ID: <82487.1609006918@turing-police> (raw)

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Fedora Rawhide has started including gcc 11,and the g++ compiler
throws a wobbly when it hits scripts/gcc-plugins:

  HOSTCXX scripts/gcc-plugins/latent_entropy_plugin.so
In file included from /usr/include/c++/11/type_traits:35,
                 from /usr/lib/gcc/x86_64-redhat-linux/11/plugin/include/system.h:244,
                 from /usr/lib/gcc/x86_64-redhat-linux/11/plugin/include/gcc-plugin.h:28,
                 from scripts/gcc-plugins/gcc-common.h:7,
                 from scripts/gcc-plugins/latent_entropy_plugin.c:78:
/usr/include/c++/11/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO
 C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
   32 | #error This file requires compiler and library support \

In fact, it works just fine with c++11, which has been in gcc since 4.8,
and we now require 4.9 as a minimum.

Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>

diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile
index d66949bfeba4..b5487cce69e8 100644
--- a/scripts/gcc-plugins/Makefile
+++ b/scripts/gcc-plugins/Makefile
@@ -22,9 +22,9 @@ always-y += $(GCC_PLUGIN)
 GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin)

 plugin_cxxflags	= -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \
-		   -I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++98 \
+		   -I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++11 \
 		   -fno-rtti -fno-exceptions -fasynchronous-unwind-tables \
-		   -ggdb -Wno-narrowing -Wno-unused-variable -Wno-c++11-compat \
+		   -ggdb -Wno-narrowing -Wno-unused-variable \
 		   -Wno-format-diag

 plugin_ldflags	= -shared



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             reply	other threads:[~2020-12-26 18:23 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-26 18:21 Valdis Klētnieks [this message]
2021-01-05 15:26 ` [PATCH] gcc-plugins: fix gcc 11 indigestion with plugins Josh Poimboeuf
2021-01-06 23:09 ` Kees Cook
2021-01-11  9:47   ` Geert Uytterhoeven
2021-01-11 10:56     ` Valdis Klētnieks
2021-01-11 11:02       ` Geert Uytterhoeven
2021-01-11 12:31         ` Valdis Klētnieks
2021-01-11 13:37           ` Josh Poimboeuf
2021-01-11 19:48             ` Kees Cook
2021-01-11 19:55               ` Valdis Klētnieks

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