* Bump the minimum version of gcc since supertux require the C++14
standard.
* Add boost locale dependency since it's now checked by the build
system.
* Add libpng dependency for savepng feature.
* Add freetype dependency for the support for right-to-left languages.
* Disable ENABLE_OPENGLES2 for now, it can be enabled by a follow up
patch.
* We don't add SDL_ttf dependency since it's included in the supertux
source code.
* There is curently no libraqm package in Buildroot.
* Remove the two sed command from SUPERTUX_FIX_ALTIVEC_ISSUE since the
CMake code has changed. Keep the one for tinygettext.
See:
https://www.supertux.org/news/2018/12/23/0.6.0
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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