Add workaround for crystax lrintf segfault

Author: Kim Rinnewitz

pythonforandroid/recipes/openal/__init__.py

@@ -20,10 +20,16 @@ def prebuild_arch(self, arch):
     def build_arch(self, arch):
         with current_directory(self.get_build_dir(arch.arch)):
             env = self.get_recipe_env(arch)
+            cmake_args = [
+                '-DCMAKE_TOOLCHAIN_FILE={}'.format('XCompile-Android.txt'),
+                '-DHOST={}'.format(self.ctx.toolchain_prefix)
+            ]
+            if self.ctx.ndk == 'crystax':
+                # avoids a segfault in libcrystax when calling lrintf
+                cmake_args += ['-DHAVE_LRINTF=0']
             shprint(
                 sh.cmake, '.',
-                '-DCMAKE_TOOLCHAIN_FILE={}'.format('XCompile-Android.txt'),
-                '-DHOST={}'.format(self.ctx.toolchain_prefix),
+                *cmake_args,
                 _env=env
             )
             shprint(sh.make, _env=env)