[Buildroot] [PATCH 2/2 for 2015.11.x] package/gawk: do not use readeline ormpfr in host variant

[Peter Korsgaard <peter@korsgaard.com>]

>>>>> "Yann" == Yann E MORIN <yann.morin.1998@free.fr> writes:

 > gawk has an optional dependency on mpfr (and thus gmp) and readline,
 > and will probe for them. If they are present, they are used; if they
 > are missing, that's not an error. mpfr (and gmp) is used for "BIGNUM"
 > support on gawk; readline is used by the gawk debugger.

 > However, mpfr (bringing gmp) are also host-packages in Buildroot, but in
 > the standard build order (i.e. a plain 'make'), they are built after
 > gawk. Ditto readline (from ncurses).

 > If the user has the development files for gmp and mpfr, then gawk is
 > linked to them. Ditto readline.

 > Now, further on in the build, we build gmp and mpfr (for gcci or guile),
 > so we install them in the host dir. Ditto readline (for gdb, ncurses
 > itself and a few other packages...)

 > But because we forcibly set an RPATH tag on all our host binaries, our
 > host gawk will now dynamically link with our versions, when it was in
 > fact built against the host ones.

 > This did not seem to cause any harm dso far, but is far from ideal.

 > Since we do not really need BIGNUM or the debugger in our host gawk, we
 > just forcibly disable them and configure gawk without readline or mpfr
 > (there's no switch for gmp, but it;s not a direct dependency, it comes
 > just with mpfr).

 > Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
 > Cc: Peter Korsgaard <jacmet@uclibc.org>
 > Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

 > ---
 > Peter, that's also for the 2015.11.x maintenance branch.

Committed, thanks - And I'll also cherry pick this.

Not directly related to this, but we should probably also explictly
handle the readline/mpfr dependencies for the target gawk.

-- 
Bye, Peter Korsgaard