I am trying to understand and use crossdev to build Gentoo for my
Raspberry Pi, and I have a couple of questions. I was able to
successfully build a toolchain::
crossdev -S -t armv6j-hardfloat-linux-gnueabi
This correctly installed binutils, gcc, glibc, and linux-headers::
equery list cross-armv6j-hardfloat-linux-gnueabi/*
* Searching for * in cross-armv6j-hardfloat-linux-gnueabi ...
[I-O] [ ] cross-armv6j-hardfloat-linux-gnueabi/binutils-2.22-r1:0
[I-O] [ ] cross-armv6j-hardfloat-linux-gnueabi/gcc-4.5.4:4.5
[I-O] [ ] cross-armv6j-hardfloat-linux-gnueabi/glibc-2.15-r3:2.2
[I-O] [ ] cross-armv6j-hardfloat-linux-gnueabi/linux-headers-3.6:0
I then copied the configuration from
/usr/armv6j-hardfloat-linux-gnueabi/etc/portage to an alternate
location, so I could modify it without impacting the crossdev toolchain.
Next, I started to emerge some ebuilds into a staging directory using
the following commands::
export CBUILD=$(portageq envvar CHOST)
export PORTAGE_CONFIGROOT=/home/dustin/rpi-build/configroot
export ROOT=/home/dustin/rpi-build/buildroot/
export PORTAGE_TMPDIR=/home/dusitn/rpi-build/tmp
emerge --nodeps baselayout
emerge --onlydeps baselayout
The first pass completed successfully, but the second failed to build
psmisc::
checking for tgetent in -ltinfo... no
checking for tgetent in -lncurses... no
checking for tgetent in -ltermcap... no
configure: error: Cannot find tinfo, ncurses or termcap libraries
config.log shows this::
configure:3970: checking for tgetent in -lncurses
configure:3995: armv6j-hardfloat-linux-gnueabi-gcc -o conftest -O4
-pipe -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s
-fomit-frame-pointer conftest.c -lncurses >&5
/usr/libexec/gcc/armv6j-hardfloat-linux-gnueabi/ld: cannot find
-lncurses
collect2: ld returned 1 exit status
configure:3995: $? = 1
ncurses did get installed in the alternate root::
ls -1 ${ROOT}lib/libncurses*
/home/dustin/rpi-build/buildroot/lib/libncurses.so.5
/home/dustin/rpi-build/buildroot/lib/libncurses.so.5.9
/home/dustin/rpi-build/buildroot/lib/libncursesw.so.5
/home/dustin/rpi-build/buildroot/lib/libncursesw.so.5.9
Now, I've found that if I install ncurses in /usr/${CHOST} instead of
${ROOT}, psmisc will build successfully. I am thus confused on where
things are supposed to be built. The Cross Development Guide says not to
install pieces of the toolchain in /usr/${CHOST}, but some ebuilds, like
openrc, have explicit RDEPENDs on them, so emerge pulls them in. I'm not
sure how to resolve this seeming catch-22 where I can't install runtime
dependencies in /usr/${CHOST}, but I also can't install build
dependencies in in ${ROOT}.
I am hoping to have this process scriptable, so my current method of
just installing missing build dependencies in /usr/${CHOST} after
something fails won't work. Any pointers would be appreciated.
Thanks,
--
♫Dustin
