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eec5d85328
- Fix cross build issues with configuring gmp libs
As gdb 11 or newer requires gmp libs as dependency, a cross build of
gdb 11.2 started to fail when its configure scripts try to detect if
gmp exists. The failure occurs mainly because the build still
passes '-L/usr/lib64` to LDFLAGS. Let's say, for example, host
toolchains outside of sysroot have amd64 libs, while the target
inside of sysroot should have arm64 libs. However, configure scripts
of gdb 11.2 still try to find its libs outside of sysroot,
/usr/lib64, although it should find its libs inside of sysroot,
e.g. /build/arm64/usr/lib64.
To fix the cross build issues, pass --with-sysroot as well as
--libdir, correctly with ${ESYSROOT}.
As a side note, for some reason, upstream gdb configure scripts are
not able to correctly make use of its gmp-specific options like
--with-gmp or --with-gmp-lib. Passing those options does not bring
anything. Also configure must have both --with-sysroot and
--libdir, to make the build work.
- Replace dependency on virtual/yacc with app-alternatives/yacc
The former is gone in favor of the latter in Gentoo. This change
will be dropped when we sync the package with Gentoo again.