[U-Boot] [PATCH] tools/Makefile: build host tools with -std=gnu99

[Philipp Tomsich]

> On 30.03.2019, at 15:29, Thomas Petazzoni <thomas.petazzoni at bootlin.com> wrote:
> 
> Parts of the code are using C99 constructs (such as variables declared
> inside loops), but also GNU extensions (such as typeof), so using
> -std=gnu99 is necessary to build with older versions of gcc that don't
> default to building with gnu99.
> 
> It fixes the following build failure:
> 
> ./tools/../lib/crc16.c: In function "crc16_ccitt":
> ./tools/../lib/crc16.c:70:2: error: "for" loop initial declarations are only allowed in C99 mode
>  for (int i = 0;  i < len;  i++)
>  ^
> ./tools/../lib/crc16.c:70:2: note: use option -std=c99 or -std=gnu99 to compile your code
> 
> when building the host tools with gcc 4.7.
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>

Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>