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

[Claudio Imbrenda]

On Tue, 28 Jul 2020 20:37:29 +0200
Thomas Huth <thuth@redhat.com> 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>
> ---
>  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

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>