- set _GLIBCXX_ASSERTIONS by default - remove CPPFLAGS by default - fix a long-standing checkapk buf that broke on + in pkgnames - disable /etc/apk/cache use for rootbld when cross-building with CBUILD= and qemu integration.
- set _GLIBCXX_ASSERTIONS by default - remove CPPFLAGS by default - fix a long-standing checkapk buf that broke on + in pkgnames - disable /etc/apk/cache use for rootbld when cross-building with CBUILD= and qemu integration.