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Re: [Qemu-devel] [PATCH v2 3/4] configure: Let SDL support be optional o

From: Philippe Mathieu-Daudé
Subject: Re: [Qemu-devel] [PATCH v2 3/4] configure: Let SDL support be optional on OpenBSD
Date: Thu, 24 Jan 2019 14:51:08 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0

On 1/24/19 12:23 PM, Gerd Hoffmann wrote:
>>      sdl)
>>      if test "$sdl" = "no"; then
>> -        error_exit "sdl not found or disabled, can not use sdl audio driver"
>> +        echo "WARN: sdl not found or disabled, can not use sdl audio driver"
>> +        audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/sdl *//g')
> Busy tackling that in a separate patch series (audio: rework driver
> probing)

But we need the Milkymist TMU fixes to build without SDL,
I still get this error when building the series you mentioned using
--disable-sdl on OpenBSD:

    LINK    lm32-softmmu/qemu-system-lm32
  hw/lm32/milkymist.o: In function `milkymist_tmu2_create':
  hw/lm32/milkymist-hw.h:114: undefined reference to `XOpenDisplay'
  hw/lm32/milkymist-hw.h:140: undefined reference to `XFree'
  hw/lm32/milkymist-hw.h:141: undefined reference to `XCloseDisplay'
  hw/lm32/milkymist-hw.h:130: undefined reference to `XCloseDisplay'
  ../hw/display/milkymist-tmu2.o: In function `tmu2_glx_init':
  hw/display/milkymist-tmu2.c:112: undefined reference to `XOpenDisplay'
  hw/display/milkymist-tmu2.c:123: undefined reference to `XFree'
  collect2: error: ld returned 1 exit status
  gmake[1]: *** [Makefile:199: qemu-system-lm32] Error 1

>>      fi
>>      ;;
>> @@ -3408,6 +3409,9 @@ for drv in $audio_drv_list; do
>>      ;;
>>      esac
>>  done
>> +if test -z "$audio_drv_list"; then
>> +    audio_drv_list="none"
>> +fi
> Not needed, "none" is used as fallback even without this.

It is not needed indeed, but I find it clearer when looking at the
./configure output, rather than having an empty list:

  SDL support       no
  Audio drivers
  GEN     config-host.h


  SDL support       no
  Audio drivers     none
  GEN     config-host.h

Maybe my error was to not clarify that this change is purely cosmetic.

Your call anyway.

> The other tree patches look fine to me, I'll go queue them up.

Thanks! I'll wait for Michael Walle feedbacks before respining rebased
on your work, also fixing "WARN".

> cheers,
>   Gerd

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