netdev - [PATCH ethtool v2] Require a compiler with support for C11 features

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Date: Wed, 24 May 2023 13:03:49 +0200
From: Dario Binacchi <dario.binacchi@...rulasolutions.com>
To: netdev@...r.kernel.org
Cc: Michal Kubecek <mkubecek@...e.cz>,
	Dario Binacchi <dario.binacchi@...rulasolutions.com>
Subject: [PATCH ethtool v2] Require a compiler with support for C11 features

Just like the kernel, which has been using -std=gnu11 for about a year,
we also require a C11 compiler for ethtool.

Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
---
Changes in v2:
-  Enable support to C11 compiler instead of C++11
---
 configure.ac | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/configure.ac b/configure.ac
index c1e001247138..5735e24927e2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13,6 +13,15 @@ AC_PROG_GCC_TRADITIONAL
 AM_PROG_CC_C_O
 PKG_PROG_PKG_CONFIG
 
+AC_DEFUN([AX_CHECK_STDC],
+	 [AX_CHECK_COMPILE_FLAG([-std=gnu11],
+		[AX_APPEND_FLAG([-std=gnu11])],
+		[AX_CHECK_COMPILE_FLAG([-std=c11],
+			[AX_APPEND_FLAG([-std=c11])],
+			[AC_MSG_ERROR([$PACKAGE requires a C11 compiler])])
+		])
+	])
+
 dnl Checks for libraries.
 
 dnl Checks for header files.
-- 
2.32.0