Some baseline thoughts

[Stephan Bergmann]

On 03/16/2017 12:48 PM, Miklos Vajna wrote:
> On Thu, Mar 16, 2017 at 12:20:54PM +0100, Stephan Bergmann <sbergman at redhat.com> wrote:
>> Bumping this to macOS 10.9 would get rid of the last known case of
>> !HAVE_THREADSAFE_STATICS (cf. <https://cgit.freedesktop.org/libreoffice/core/commit/?id=aa2fbfc4faa24cf7ee5aa9afdafddbd536ac4fec>
>> "Found out that Mac OS X 10.9 has working threadsafe statics").  What is
>> unknown however is the status on Android and iOS.  Having
>> HAVE_THREADSAFE_STATICS everywhere would allow to clean up code, see e.g.
>> <https://gerrit.libreoffice.org/#/c/35258/> "replace double-checked-locking
>> with C++11 static initializer".
> 
> master-android$ grep -R THREADSAFE config_*/*.h
> config_build/config_global.h:#define HAVE_THREADSAFE_STATICS 1
> config_host/config_global.h:#define HAVE_THREADSAFE_STATICS 0
> 
> But this is not set in stone, quite possibly the Android toolchain (NDK,
> which provides the C++ cross-compiler) can be updated to a newer
> version, and then the problem will go away. (See
> "with_android_ndk_toolchain_version=4.9" in configure.ac.)

So after the recent bump to macOS 10.9, HAVE_THREADSAFE_STATICS should 
effectively be true everywhere expect on Android (where configure.ac 
doesn't bother at all to decide whether or not it would be true, always 
leaving it false; either because it is known to be false for the current 
Android baseline, or because those setting up Android support didn't 
bother).

Can somebody clarify the actual situation on Android?