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X-Received-From: 2a00:1450:4864:20::444 Subject: [Qemu-devel] [RFC PATCH 1/3] HACKING: mention the C GNU extensions we use X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Alex_Benn=C3=A9e?= Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" QEMU is not a pure C99 code-base as anyone attempting to build with -std=c99 will find out. Signed-off-by: Alex Bennée --- HACKING | 5 +++++ 1 file changed, 5 insertions(+) -- 2.17.1 diff --git a/HACKING b/HACKING index 0fc3e0fc04..e042dd1f4f 100644 --- a/HACKING +++ b/HACKING @@ -189,6 +189,11 @@ In addition, QEMU assumes that the compiler does not use the latitude given in C99 and C11 to treat aspects of signed '<<' as undefined, as documented in the GNU Compiler Collection manual starting at version 4.0. +Finally QEMU also uses some GNU extensions to the C language including +making extensive use of the typeof keyword for type inference. While +typeof() is a GCC extension it is fairly widely understood by other +compilers. + 7. Error handling and reporting 7.1 Reporting errors to the human user