c9d3df08b3
Originally "gcc -dumpmachine" was used to detect build gcc triplet.
However, abuild does not depend on gcc or build-base (but installs
it if needed to build) so gcc might not be there. Additionally
abuild-sign can be used standalone, and does not have gcc dependency.
Using ${CC:-gcc} is problematic in cross-compile, as CC might be
already set for the cross-compiler and would result giving the target
host triplet.
It was deemed simplest to use "apk --print-arch" exclusively to detect
the builder host type, or specify CBUILD manually. If there is need
to use abuild/abuild-sign on non-Alpine hosts withou apk, we can
later add fallback that uses "uname -m" to detect the architecture
and guess Alpine CBUILD from it.
Fixes #9974
Fixes: 5adf47c1 "functions.sh: use apk --print-arch for CARCH if gcc is missing"
Fixes: 95cd15c0 "functions.sh: dont die if gcc is missing"