Re: [Qemu-devel] [PATCH] hw/char/parallel: Make it possible to compile also without CONFIG_PARALLEL

[Thomas Huth <thuth@redhat.com>]

On 09/03/2019 09.12, Thomas Huth wrote:
> For the downstream distribution of QEMU, we want to compile without
> CONFIG_PARALLEL. Commit 9157eee1b1c076ff3 already moved the function
> parallel_hds_isa_init() (which is still required for linking) into a file
> that is included anyway, but commit bb3d5ea858e7f888563a moved it
> to a separate file which is only compiled again if CONFIG_PARALLEL is
> set. To be able to link QEMU again without CONFIG_PARALLEL, let's
> move this file unconditionally to common-obj-y again. And while we're
> at it, also rename it to parallel-helper.c (since parallel.c is also
> about ISA already), add a proper comment in there with the rationale
> for the separate file, and a check via object_class_by_name() to see
> whether the device class is available in the binary or not.
> 
> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  hw/char/Makefile.objs                         |  2 +-
>  hw/char/{parallel-isa.c => parallel-helper.c} | 10 +++++++++-
>  hw/char/parallel.c                            |  1 -
>  hw/i386/Kconfig                               |  2 --
>  include/hw/char/parallel.h                    |  2 ++
>  5 files changed, 12 insertions(+), 5 deletions(-)
>  rename hw/char/{parallel-isa.c => parallel-helper.c} (70%)
> 
> diff --git a/hw/char/Makefile.objs b/hw/char/Makefile.objs
> index c4947d7..5476803 100644
> --- a/hw/char/Makefile.objs
> +++ b/hw/char/Makefile.objs
> @@ -2,7 +2,7 @@ common-obj-$(CONFIG_IPACK) += ipoctal232.o
>  common-obj-$(CONFIG_ESCC) += escc.o
>  common-obj-$(CONFIG_NRF51_SOC) += nrf51_uart.o
>  common-obj-$(CONFIG_PARALLEL) += parallel.o
> -common-obj-$(CONFIG_PARALLEL) += parallel-isa.o
> +common-obj-y += parallel-helper.o

Self-NACK.

This has to be "common-obj-$(CONFIG_ISA_BUS) += parallel-helper.o" since
it uses the function isa_create(). ... thus, maybe I should also not
rename the file here... I'll ponder about that in a v2...

 Thomas