#!/bin/sh

# Reading system configuration informations, functions and package versions.
source ../sysinfos
source ../functions
source ../packages-list

# First, backup the /tools linker, and replace it with the adjusted linker
# we made in chapter 5. We'll also create a link to its counterpart in
# /tools/$(gcc -dumpmachine)/bin.
mv -v /tools/bin/{ld,ld-old} &&
mv -v /tools/$(gcc -dumpmachine)/bin/{ld,ld-old} &&
mv -v /tools/bin/{ld-new,ld} &&
ln -sv /tools/bin/ld /tools/$(gcc -dumpmachine)/bin/ld &&

# Amend the GCC specs file so that it points to the new dynamic linker, and so
# that GCC knows where to find its start files.
gcc -dumpspecs | sed \
    -e 's@/tools/lib/ld-linux.so.2@/lib/ld-linux.so.2@g' \
    -e '/\*startfile_prefix_spec:/{n;s@.*@/usr/lib/ @}' \
    -e '/\*cpp:/{n;s@$@ -isystem /usr/include@}' > \
    `dirname $(gcc --print-libgcc-file-name)`/specs &&

# Testing toolchain
cd /tmp &&
echo 'main(){}' > dummy.c &&
cc dummy.c -Wl,--verbose &> dummy.log &&
if [ ! readelf -l a.out | grep 'Requesting program interpreter: /lib/' \
    1> /dev/null 2>&1 ]; then
    exit 1
fi &&

if [ ! grep "attempt to open /usr/lib/crt.* succeeded" dummy.log 1> /dev/null 2>&1 ]; then
    exit 1
fi &&

if [ ! grep "attempt to open /lib/libc.so.6 succeeded" dummy.log 1> /dev/null 2>&1 ]; then
    exit 1
fi &&

if [ ! grep "found ld-linux.so.2 at /lib/ld-linux.so.2" dummy.log 1> /dev/null 2>&1 ]; then
    exit 1
fi &&

rm dummy.c a.out

# Return last error
exit $?