[SeaBIOS] [PATCH] Makefile: Explicitly pass `no-pic` to compiler

[Paul Menzel]

Dear SeaBIOS folks,


Am Sonntag, den 23.10.2016, 20:57 +0200 schrieb Paul Menzel:
> Date: Sun, 23 Oct 2016 18:56:28 +0200
> 
> Debian enables PIE hardening flags by default since package gcc-6
> 6.2.0-7 [1].
> 
> With that change, SeaBIOS fails to build with the error below [2][3].
> 
> ```
> $ make
>   Build Kconfig config file
>   Compile checking out/src/misc.o
>   Compile checking out/src/stacks.o
> src/stacks.c: Assembler messages:
> src/stacks.c:567: Error: found '(', expected: ')'
> src/stacks.c:567: Error: junk `(%ebp))' after expression
> src/stacks.c:568: Warning: indirect call without `*'
> Makefile:133: die Regel für Ziel „out/src/stacks.o“ scheiterte
> make: *** [out/src/stacks.o] Fehler 1
> ```
> 
> Passing `no-pic` to the compiler fixes this issue.
> 
> [1] https://bugs.debian.org/835148
> [2] https://bugs.debian.org/841546
> [3] https://www.seabios.org/pipermail/seabios/2016-October/010980.html
>     "Build failure with GCC 6 from Debian Sid/unstable"
> 
> Signed-off-by: Paul Menzel <paulepanter at users.sourceforge.net>
> ---
>  Makefile | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/Makefile b/Makefile
> index 41bfcf4..4a20631 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -61,7 +61,8 @@ COMMONCFLAGS := -I$(OUT) -Isrc -Os -MD -g \
>      -m32 -march=i386 -mregparm=3 -mpreferred-stack-boundary=2 \
>      -minline-all-stringops -fomit-frame-pointer \
>      -freg-struct-return -ffreestanding -fno-delete-null-pointer-checks \
> -    -ffunction-sections -fdata-sections -fno-common -fno-merge-constants
> +    -ffunction-sections -fdata-sections -fno-common -fno-merge-constants \
> +		-fno-pic
>  COMMONCFLAGS += $(call cc-option,$(CC),-nopie,)
>  COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)

Using 

```
COMMONCFLAGS += $(call cc-option,$(CC),-fno-pic,)
```

did not work for whatever reason.

>  COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,)


Thanks,

Paul
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