Refactor the build environment evaluation, make build variables set
immediately so that they don't grow longer on re-evaluations and defer
all other variables. Export as many build related variables as possible.
Make one more crucial fix for cross builds: run the post_build after
LDFLAGS and LIBS are restored, so that this does not interfere with
setting and restoring the build environment for host builds.
Other changes:
- fontconfig 2.13.0 -> 2.13.1
- openal 1.19.0 -> 1.19.1
- set fontconfig configure type to autoreconf, disable tests
- disable the openssl parallel build patch, it fails unpredictably,
always build openssl with -j1
- configure libicu with --disable-tests and a few other things disabled,
the tests cause link issues on mingw i686
- also make a minor fix to libicu makefiles for mingw (replace echo -n
with printf)
- move $BUILD_ENV evaluation to the builder() main function to defer
some variable initializations
- add patch for openal to mingw-cross to use gcc instead of cmake to
build some native tools it uses, cmake causes issues with cross builds
- in host_env()/target_env() defer variable expansion and include a copy
of $BUILD_ENV in the appropriate sequence