[Mesa-dev] [PATCH 1/2] configure.ac: Add support for Android builds

[Rob Clark]

On Sun, May 22, 2016 at 10:15 PM, Nicolas Boichat <drinkcat at chromium.org> wrote:
> Hi Emil,
>
> Apologies for the delay, it's easier to answer your questions now that
> the project has launched
> (https://chrome.googleblog.com/2016/05/the-google-play-store-coming-to.html).
> Basically we are running Android in a Linux container, on top of
> existing Chrome OS.
>
> On Thu, Apr 28, 2016 at 10:36 PM, Emil Velikov <emil.l.velikov at gmail.com> wrote:
>> Hi Nicolas,
>>
>> On 28 April 2016 at 11:41, Nicolas Boichat <drinkcat at chromium.org> wrote:
>>> Add support for EGL android platform.
>>>
>>> Also, detect when --host finishes with -android. In that case, we
>>> do not set _GNU_SOURCE, and define autoconf symbol HAVE_ANDROID, so
>>> that Android-specific workarounds can be applied.
>>>
>> I'm quite happy to see patches from Android/CrOS people although I'm a
>> bit confused here.
>> Are these are based for CrOS or Android ? I thought Android had it's
>> own build system.
>
> In our context, we need 2 copies of Mesa libraries: one for Chrome OS
> (surfaceless), and another one for Android.
>
> We considered using Android build system for the Android side, but
> that means having 2 separate repos (which we'd need to keep in sync),
> and 2 different build systems (I've heard Android.mk tends to get out
> of sync over time...).
>

jfyi, Rob H had started doing android CI builds:

https://lists.freedesktop.org/archives/mesa-dev/2016-May/117200.html

Which should help keep the android builds working.  I guess there are
a few more patches not upstream yet for mesa builds, but I should hope
we are not far from having android and linux builds from same tree..

BR,
-R

> Instead, we are building both libraries using the same sources, and
> same automake-based build system, from Chrome OS chroot (we have a
> minimalist Android toolchain in the Chrome OS chroot that allows us to
> build the Android version).
>
>> Is there any documentation on how one can get things going on your platform ?
>
> No quite, yet, but the ebuild should be available very soon.
>
>>> Signed-off-by: Nicolas Boichat <drinkcat at google.com>
>>> ---
>>>  configure.ac        | 10 ++++++++++
>>>  src/egl/Makefile.am |  5 +++++
>>>  2 files changed, 15 insertions(+)
>>>
>>> diff --git a/configure.ac b/configure.ac
>>> index 5f75c60..6ee978c 100644
>>> --- a/configure.ac
>>> +++ b/configure.ac
>>> @@ -248,7 +248,11 @@ _SAVE_CPPFLAGS="$CPPFLAGS"
>>>  dnl Compiler macros
>>>  DEFINES="-D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS"
>>>  AC_SUBST([DEFINES])
>>> +android=no
>>>  case "$host_os" in
>>> +*-android)
>>> +    android=yes
>>> +    ;;
>>>  linux*|*-gnu*|gnu*)
>>>      DEFINES="$DEFINES -D_GNU_SOURCE"
>>>      ;;
>>> @@ -260,6 +264,8 @@ cygwin*)
>>>      ;;
>>>  esac
>>>
>>> +AM_CONDITIONAL(HAVE_ANDROID, test "x$android" = xyes)
>>> +
>>>  dnl Add flags for gcc and g++
>>>  if test "x$GCC" = xyes; then
>>>      CFLAGS="$CFLAGS -Wall"
>>> @@ -1959,6 +1965,9 @@ for plat in $egl_platforms; do
>>>                         AC_MSG_ERROR([EGL platform surfaceless requires libdrm >= $LIBDRM_REQUIRED])
>>>                 ;;
>>>
>>> +       android)
>> Can you update the documentation in docs/egl.html as well please. Feel
>> free to do that as follow-up patch.
>
> Will do.
>
>> Do you guys have X related libraries on the host_os ? Or you
>> explicitly disable those mesa features that depend on it ?
>
> AFAIK, no X libraries, neither on Chrome OS or Android side.
>
> Thanks!
>
> Best,
>
> Nicolas
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