Add more CI environments

[ebraminio]

Given recent developments of harfbuzz, the helpfulness of more CI bots is at least proved to me so I like to see the addition of more environments to harfbuzz CI.

In nutshell:

• Android, as the issue on PAGE_SIZE in hb-set-private.hh collides with Android NDK asm/page.h PAGE_SIZE macro #576 (done, with much more, [ci] Add CircleCI for cross-compiling #592)
• FreeBSD/OpenBSD/..., as unbreak on BSD where the major() function is defined #577 (done, [ci] Add FreeBSD #595)
• GCC 4.x, as harfbuzz 1.6.1 and later require C++11 #585 (somehow done with [ci] Add FreeBSD #595)
• arm-none-eabi, psvita, as Fails to build with arm-none-eabi Newlib toolchain #451, Fix arm-none-eabi build (fixes #451) #496, Unbreak arm-none-eabi build again #514, http://vitasdk.org, cmake .. -DCMAKE_TOOLCHAIN_FILE=$VITASDK/share/vita.toolchain.cmake && make (done, Enable PSVita (arm-none-eabi) compile again and add it to CI #594)

Not aware of how this particular one can be useful but after #576 I thought it would be nice if we could have Android build on our CI. With cmake this command can be accomplish that easily if ndk is installed:

mkdir build && cd build && cmake -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK/build/cmake/android.toolchain.cmake -DANDROID_ABI=armeabi-v7a ..

but this is unable to reproduce the very issue reported on #576. Does this seem correct and does it worth to be added to our CI or we can do some autotools based ones instead? We are also not doing cmake build testing on Travis (but on Windows CI, Appveyor) as our Travis config is very autotools oriented, how about adding a third CI just for cmake and Android CI, like CircleCI?

Also a *bsd bot can be considered nice as #577, I've aggregated some solutions for it here, is there any better one?

Also per #585, it would be nice if we could have some old GCC environment to test also.

[ebraminio]

@behdad https://github.com/dockcross/dockcross which architectures do you like most?

[behdad]

@behdad https://github.com/dockcross/dockcross which architectures do you like most?

android-arm
browser-asmjs
android-arm64
linux-mips
windows-x64

:)

[ebraminio]

@behdad, I think you meant linux-arm64? Now you should rename android-arm64 to linux-arm64 on .circleci/config.yml because of it :)

[behdad]

You are right. Thanks. :)

[ebraminio]

PSVita part on #594

@behdad, which ubuntu version do you suggest for GCC 4.x?

[behdad]

@behdad, which ubuntu version do you suggest for GCC 4.x?

Humm. I don't really know those numbers. RHEL5 might be nice if that's available.

Thanks again for all this work. This is super helpful.

[ebraminio]

RHEL5 might be nice if that's available.

Is ragel missing on RHEL/centos 5/7?

• https://circleci.com/gh/ebraminio/harfbuzz/111
• https://circleci.com/gh/ebraminio/harfbuzz/112

We now have GCC 4.x with FreeBSD9 but it would be nice if we have RHEL based images also.

[ebraminio]

Thanks again for all this work. This is super helpful.

Thank you :)

[behdad]

Is ragel missing on RHEL/centos 5/7?

Quite possibly.