Re: [PATCH for-5.2 1/6] pc-bios/s390-ccw/Makefile: Compile with -std=gnu99, -fwrapv and -fno-common

[Janosch Frank]

On 7/28/20 8:37 PM, Thomas Huth wrote:
> The main QEMU code is compiled with -std=gnu99, -fwrapv and -fno-common.
> We should use the same flags for the s390-ccw bios, too, to avoid that
> we get different behavior with different compiler versions that changed
> their default settings in the course of time (it happened at least with
> -std=... and -fno-common in the past already).
> 
> While we're at it, also group the other flags here in a little bit nicer
> fashion: Move the two "-m" flags out of the "-f" area and specify them on
> a separate line.
> 
> Signed-off-by: Thomas Huth <thuth@redhat.com>

What was the argument for z900 again? TCG?
Maybe we can also move to z10?

Anyway:
Acked-by: Janosch Frank <frankja@linux.ibm.com>


> ---
>  pc-bios/s390-ccw/Makefile | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/pc-bios/s390-ccw/Makefile b/pc-bios/s390-ccw/Makefile
> index 50bc880272..9abb0ea4c0 100644
> --- a/pc-bios/s390-ccw/Makefile
> +++ b/pc-bios/s390-ccw/Makefile
> @@ -13,10 +13,11 @@ OBJECTS = start.o main.o bootmap.o jump2ipl.o sclp.o 
> menu.o \
>         virtio.o virtio-scsi.o virtio-blkdev.o libc.o cio.o dasd-ipl.o
>  
>  QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS))
> -QEMU_CFLAGS += -ffreestanding -fno-delete-null-pointer-checks -msoft-float
> -QEMU_CFLAGS += -march=z900 -fPIE -fno-strict-aliasing
> -QEMU_CFLAGS += -fno-asynchronous-unwind-tables
> +QEMU_CFLAGS += -ffreestanding -fno-delete-null-pointer-checks -fno-common 
> -fPIE
> +QEMU_CFLAGS += -fwrapv -fno-strict-aliasing -fno-asynchronous-unwind-tables
>  QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -fno-stack-protector)
> +QEMU_CFLAGS += -msoft-float -march=z900
> +QEMU_CFLAGS += -std=gnu99
>  LDFLAGS += -Wl,-pie -nostdlib
>  
>  build-all: s390-ccw.img s390-netboot.img
>

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