# old stage 2 based on a broken stage 1, so carefull what to pick
# into the next version..

# common issues
###############

TODOS: in linux package makepkg
https://github.com/libarchive/libarchive/issues/411

https://rubenerd.com/sata-on-qemu/

/usr/libexec/qemu-kvm --enable-kvm -cpu 486 -m 32 -vnc 0.0.0.0:2 \
	-kernel linux/pkg/linux/boot/vmlinuz-linux \
	-append 'root=/dev/hda1 nomodeset init=/etc/rc console=ttyS0 console=tty0' \
	-cdrom /data/isos/arch486.iso -hda /data/libvirt/arch486.qcow2 -nographic

qemu-system-i386 --enable-kvm -cpu 486 -m 32 -cdrom /data/isos/arch486.iso \
	-hda /data/libvirt/arch486.qcow2 -curses -boot d \
	-netdev user,id=net0,net=10.0.0.0/24,host=10.0.0.2,dhcpstart=10.0.0.16,hostfwd=tcp::2222-:22 \
	-device rtl8139,netdev=net0

qemu-system-i386 --enable-kvm -cpu 486 -m 32 \
	-hda /home/cross/arch486.img -curses -boot d \
	-netdev user,id=net0,net=10.0.0.0/24,host=10.0.0.2,dhcpstart=10.0.0.16,hostfwd=tcp::2222-:22 \
	-device rtl8139,netdev=net0

PHASE 2
#######

# tcl
#####
# disable tests: cynical, disable unit tests of a software needed for testing

# dejagnu
#########
# has hard-wired AC_PROG_CXX in configure, remove internal C++ tests
sed -i '/.\/configure/ i \  sed -i "s@AC_PROG_CXX@#AC_PROG_CXX@" configure.ac' dejagnu/PKGBUILD
sed -i '/configure.ac/ a \  sed -i "s@\\(unit_SOURCES.*\\)@#\\1@g" Makefile.am' dejagnu/PKGBUILD
sed -i '/configure.ac/ a \  sed -i "s@\\(check_PROGRAMS*\\)@#\\1@g" Makefile.am' dejagnu/PKGBUILD
sed -i '/Makefile.am/ a \  autoreconf' dejagnu/PKGBUILD

# TODO: gcc
#####
TODO:
sed -i 's@^makedepends\(.*\)@#makedepends\1@g' binutils/PKGBUILD
sed -i 's@^checkdepends\(.*\)@#checkdepends\1@g' binutils/PKGBUILD
sed -i 's@^depends\(.*\)@#depends\1@g' binutils/PKGBUILD

# gcc
#####
# no gcc-ada and doxygen
sed -i '/makedepend/ s/gcc-ada //g' gcc/PKGBUILD
sed -i '/makedepend/ s/doxygen //g' gcc/PKGBUILD
# avoid huge git checkouts
sed -i 's@git+https://gcc.gnu.org/git/gcc.git.*@ftp://ftp.mpi-sb.mpg.de/pub/gnu/mirror/gcc.gnu.org/pub/gcc/releases/${pkgname}-${pkgver}/${pkgname}-${pkgver}.tar.gz@' gcc/PKGBUILD
sed -i 's@cd gcc$@cd ${pkgname}-${pkgver}@g' gcc/PKGBUILD
sed -i 's@$srcdir/gcc/configure@$srcdir/${pkgname}-${pkgver}/configure@g' gcc/PKGBUILD
# we don't have a working C++ compiler right now, be must bootstrap
# doesn't work, we need c++ sind 4.8!
#sed -i '/--enable-shared/ a \      --enable-bootstrap \\' gcc/PKGBUILD
# remove ADA, we don't have (and will most likely never have a GNAT binary to
# bootstrap ADA itself), on the other hand, there is nothing using ADA anyway.
# at least not in packages/community
sed -i '/pkgname/ s/gcc-ada//g' gcc/PKGBUILD
sed -i '/enable-languages/ s/ada//g' gcc/PKGBUILD
# send bugs to the right place
sed -i 's@https://bugs.archlinux.org/@https://bugs.archlinux32.org/@g' gcc/PKGBUILD
# so, I don't know what GNU people call bootstrapping, but this definitely isn't for C!
/usr/include/c++/7.2.0/cstdlib:75:15: fatal error: stdlib.h: No such file or directory
=> let's try to fix the C++ compiler then..
# this is really really dangerous, let's hope, it works
=> find /usr/include/c++/7.2.0 -type f -exec sed -i 's/#include_next/#include/g' {} \;
# /build/gcc/src/gcc-7.2.0/libgo/testsuite/gotest: line 624: 28445 Killed                  ./a.out -test.short -test.timeout=${timeout}s "$@"
=> ok, enough, go without testing
==> Starting package_gcc-go()...
make: *** i486-pc-linux-gnu/libgo: No such file or directory.  Stop.
==> ERROR: A failure occurred in package_gcc-go().
    Aborting...
=> fails, oh well, nobody needs go :-)


why the hell, I switched off c++, so wy are still cpp probes being done!?
/lib/cpp hardcoded, seriosly!!
# in prepare()
ln -s ../bin/cpp /home/cross/x-tools/i486-unknown-linux-gnu/lib/cpp
find . -name configure -exec sed -i 's@/lib/cpp@/home/cross/x-tools/i486-unknown-linux-gnu/bin/cpp@g' {} \;

since 4.8 gcc is written in C++, fine. so we have to have a crosstool-ng C++ or
=> we add C++ to the crosstool-ng toolchain, easier and more secure

 included from /home/cross/build/gcc/src/gcc-7.2.0/gcc/genmddeps.c:19:0:
/home/cross/build/gcc/src/gcc-7.2.0/gcc/system.h:540:34: error: declaration of C function ‘const cha
r* strsignal(int)’ conflicts with
 extern const char *strsignal (int);
                                  ^
In file included from /usr/include/c++/4.8.2/cstring:42:0,
                 from /home/cross/build/gcc/src/gcc-7.2.0/gcc/system.h:235,
                 from /home/cross/build/gcc/src/gcc-7.2.0/gcc/genmddeps.c:19:
/usr/include/string.h:562:14: error: previous declaration ‘char* strsignal(int)’ here
 extern char *strsignal (int __sig) __THROW;             ^
In file included from ./bconfig.h:5:0,
=> so, we get to an end here, c++ is taken from the host while cross-compiling?!
-> remove glibc-devel on the host!
-> draw the g++ link, autoconf fails in gcc in funny ways (not finding uint64_t)
-> carefull, we build a gcc over a crossng-gcc, not sure, this is supported..
-> aha. if mpfr, mpc and gmp are not installed and taken from sysroot but from i486-root
   some pathes get messed up.

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82590
https://www.mail-archive.com/gcc-bugs@gcc.gnu.org/msg550065.html
https://gcc.gnu.org/bugzilla/show_bug.cgi?format=multiple&id=54692

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65863
-> huh?
https://gcc.gnu.org/ml/gcc-help/2016-06/msg00016.html
- > yes, this is the inicatition I needed, mpfr, gmp and mpc point to a weird location

The stage one compiler doesn't find the shared library, o well:
/home/cross/build/gcc/src/gcc-build/./gcc/cc1: error while loading shared libraries: libmpc.so.3: cannot open shared object file: No such file or directory
-> export LD_LIBRARY_PATH=/home/cross/x-tools/i486-unknown-linux-gnu/i486-unknown-linux-gnu/sysroot/usr/lib

And it never ends:
In file included from /home/cross/build/gcc/src/gcc-7.2.0/libgcc/libgcc2.c:27:0:
/home/cross/build/gcc/src/gcc-7.2.0/libgcc/../gcc/tsystem.h:87:10: fatal error: stdio.h: No such file or directory
 #include <stdio.h>
          ^~~~~~~~~
compilation terminated.
make[2]: *** [Makefile:491: _muldi3.o] Error 1
-> https://gcc.gnu.org/ml/gcc-help/2012-04/msg00088.html
-> so, let's try giving it a --with-sysroot to the crosstool-ng dirs
-> and this means also it got past stage 1 compilers :-)

/home/cross/x-tools/i486-unknown-linux-gnu/lib/gcc/i486-unknown-linux-gnu/4.9.4/../../../../i486-unknown-linux-gnu/bin/ld: /home/cross/build/gcc/src/gcc-build/./gcc/liblto_plugin.so: error loading plugin: /home/cross/build/gcc/src/gcc-build/./gcc/liblto_plugin.so: wrong ELF class: ELFCLASS32
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:982: libgcc_s.so] Error 1
=> for now, remove LTO stuff in PKGBUILD

make: *** i486-unknown-linux-gnu/libstdc++-v3/doc: No such file or directory.  Stop.
==> ERROR: A failure occurred in build().
    Aborting...
=> remove the PKGBUILD line #  make -C $CHOST/libstdc++-v3/doc DESTDIR="$pkgdir" doc-install-man
libstdc++-v3/
=> # make documentation
  #make -C $CHOST/libstdc++-v3/doc doc-man-doxygen

install: failed to access ‘/home/cross/build/gcc/pkg/gcc/usr/lib/gcc/i486-unknown-linux-gnu/7.2.0/’: No such file or directory
=> gcc auto-probed itself into i486-pc-linux-gnu, so the installed files are there
CHOST="i486-pc-linux-gnu"    
make: Leaving directory '/home/cross/build/gcc/src/gcc-build/gcc'
install: failed to access ‘/home/cross/build/gcc/pkg/gcc/usr/lib/gcc/i486-unknown-linux-gnu/7.2.0/’: No such file or directory
=> sweet, let's try a symlink

_libdir=usr/lib/gcc/$CHOST/$pkgver
=> hard-code: to _libdir=usr/lib/gcc/i486-pc-linux-gnu/$pkgver
=> nope, now others break
this is hardly the ArchLinux way: vanilla and upstream

again CHOST set to  i486-pc-linux-gnu
=> this package is a disaster!
=> we have a mess with two CHOSTS, one for crosstool-ng (unknown) and
   one for our chroot

# remove traces of ADA
  rm "$pkgdir"/usr/share/info/{gccgo,gfortran.info}

# rm: cannot remove ‘/home/cross/build/gcc/pkg/gcc/usr/share/info/gccgo’: No such file or directory
#  rm "$pkgdir"/usr/share/info/{gccgo,gfortran.info}

/home/cross/x-tools/i486-unknown-linux-gnu/lib/gcc/i486-unknown-linux-gnu/4.9.4/../../../../i486-unknown-linux-gnu/bin/ld: cannot find -lquadmath
collect2: error: ld returned 1 exit status
libtool: install: error: relink `libgfortran.la' with the above command before installing it
make: *** [Makefile:1331: install-toolexeclibLTLIBRARIES] Error 1
make: Leaving directory '/home/cross/build/gcc/src/gcc-build/i486-unknown-linux-gnu/libgfortran'
==> ERROR: A failure occurred in package_gcc-libs().
    Aborting...
=> libquadmath must be retooled before libfortran
=> nope libfortran simply fails to relink => remove it

install: cannot stat ‘/home/cross/build/gcc/src/gcc/COPYING.RUNTIME’: No such file or directory
=> sweet, remove it

error: failed to commit transaction (conflicting files)
gcc: /home/cross/i486-root/usr/lib/libstdc++.a exists in filesystem (owned by gcc-libs)
gcc: /home/cross/i486-root/usr/lib/libstdc++.la exists in filesystem (owned by gcc-libs)
Errors occurred, no packages were upgraded.
=> well, force the package

test.c:1:10: fatal error: stdio.h: No such file or directory


# END TODO: gcc

# glibc
#######
# use 2.25 version, not 2.26. Keep the ABI intact!
# endless loop? gawk -f ../scripts/gen-as-const.awk pthread-pi-defines.sym \
# two reasons: clock and artifacts walk backwards or forward in time
# chroot on server with chroot, hard to have an asynchronous clock?
# or glibc is already installed on the system (where not?), so how the
# hell can it be possibly built!
# => oh, this would be cruel.
# or 3rd reason, we have a glibc shim, maybe this one causes some trouble
# => why?
# or libtool fixing, whatever fixing means (https://forums.gentoo.org/viewtopic-t-496052-start-0.html)
# => nope.
# -isystem /usr/includ ein gcc spec? quite likely!
# ah: old friend:
build/glibc/src/glibc-build/libc.a(dl-sysdep.o): In function `.L18':
dl-sysdep.c:(.text+0x8c): undefined reference to `__memcmp_ia32'
/build/glibc/src/glibc-build/libc.a(dl-sysdep.o): In function `.L87':
dl-sysdep.c:(.text+0x11f): undefined reference to `__memcmp_ia32'
/build/glibc/src/glibc-build/libc.a(dl-sysdep.o): In function `.L19':
dl-sysdep.c:(.text+0x152): undefined reference to `__memcmp_ia32'
/build/glibc/src/glibc-build/libc.a(dl-sysdep.o): In function `.L85':
dl-sysdep.c:(.text+0x19c): undefined reference to `__memcmp_ia32'
dl-sysdep.c:(.text+0x1b7): undefined reference to `__memcmp_ia32'
/build/glibc/src/glibc-build/libc.a(dl-sysdep.o):dl-sysdep.c:(.text+0x202): more undefined references to `__memcmp_ia32' follow
elf/sln
=> USE_MULTIARCH
=> --disable-multi-arch
=> let's test this time, too dangerous to loose the chroot otherwise!
# older 2.25 misses a binutils 2.29 patch:
https://git.busybox.net/buildroot/diff/package/glibc/0005-fix-binutils-2-29-build.patch?id=cf821efbd0b24690b52f379d4a9934a16073762e
{standard input}: Assembler messages:
{standard input}: Error: `loc1@GLIBC_2.0' can't be versioned to common symbol 'loc1'
{standard input}: Error: `loc2@GLIBC_2.0' can't be versioned to common symbol 'loc2'
{standard input}: Error: `locs@GLIBC_2.0' can't be versioned to common symbol 'locs'
make[2]: *** [../o-iterator.mk:9: /build/glibc/src/glibc-build/misc/regexp.os] Error 1

PACKAGES=" \
libgpg-error   \
      \
sysfsutils libidn iputils \
  tcl expect dejagnu  gcc  glibc"

# aftermatch for gcc/binutils

#collect2: unable to find ld: this sounds bad, like an archicture mismatch somewhere
#in binutils/gcc
=> this is the cross compiled gcc for i486 inside the chroot, it expects
   its platform dependend stuff in /usr/lib/gcc/i486-unknown-linux-gnu/7.2.0
=> we can temporarily fix this:
ln -s /usr/bin/ld /usr/lib/gcc/i486-unknown-linux-gnu/7.2.0/ld
etc.

# aftermatch for glibc

# bacause pacman cannot set file permissions
chmod u+x /usr/bin/* /lib/*.so*


# in 'real' 486
###############

next round: do those problems persist

error: could not register 'temp' database (wrong or NULL argument passed)

installed binaries have wrong permissions (no execute permission), a pacman issue?
shilly flags? libarchive problem?

later: for inside the chroot