QEMU is not a pure C99 code-base as anyone attempting to build with -std=c99 will find out.
Signed-off-by: Alex Bennée <alex.ben...@linaro.org> --- HACKING | 5 +++++ 1 file changed, 5 insertions(+) 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 -- 2.17.1
