export LC_ALL=POSIX LANG=POSIX                                                               
export PATH=$PATH:/cross/x86_64/tools/bin
export CROSS_COMPILE=x86_64-slitaz-linux-
export tools=/cross/x86_64/tools                   
export sysroot=/cross/x86_64/sysroot               
export source=/cross/x86_64/source
export TARGET=x86_64-slitaz-linux                  
export BUILD_SYSTEM=i486-slitaz-linux

mkdir -p $tools $sysroot $source
cd /cross/x86_64/source                         

# Binutils  
tar xf /home/slitaz/src/binutils-2.37.tar.bz2      
cd binutils-2.37
./configure --prefix=$tools --target=$TARGET --enable-plugins --enable-threads --enable-targets=$BUILD_SYSTEM --with-sysroot=$sysroot --disable-multilib --enable-64-bit-bfd
make              
make install      
x86_64-slitaz-linux-ar -V           

# Kernel headers                                                          
cd ..                        
tar xf /home/slitaz/src/linux-4.19.294.tar.xz                                                 
cd linux-4.19.294/
make CROSS_COMPILE="" mrproper                                                                
make ARCH=x86_64 headers_check                                                                
make ARCH=x86_64 headers_install INSTALL_HDR_PATH=$PWD/../linux-headers                       
ls ../linux-headers/                                                                          
mkdir -p $sysroot/usr                                                                         
cp -a ../linux-headers/* $sysroot/usr/                                                        
ls $sysroot/usr   
ls $sysroot/usr/include

# Glibc headers
cd ..
tar xf /home/slitaz/src/glibc-2.23.tar.gz
mkdir glibc-headers                                                                  
cd glibc-headers                                                                          
libc_cv_forced_unwind=yes libc_cv_c_cleanup=yes ../glibc-2.23/configure --prefix=/usr --host=$TARGET --with-headers=$sysroot/usr/include --without-cvs --disable-sanity-checks --enable-kernel=4.19        
make -k install-headers install_root=$sysroot      
touch $sysroot/usr/include/gnu/stubs.h

# GCC static
cd ..
mkdir gcc-static                                   
tar xf /home/slitaz/src/gcc-6.3.0.tar.bz2          
cd gcc-6.3.0/                                      
tar xf /home/slitaz/src/mpfr-4.1.0.tar.xz          
tar xf /home/slitaz/src/gmp-6.2.1.tar.bz2          
tar xf /home/slitaz/src/mpc-1.2.1.tar.gz           
mv mpfr-4.1.0 mpfr                                 
mv mpc-1.2.1 mpc                                   
mv gmp-6.2.1 gmp                                   
cd ../gcc-static                                   
../gcc-6.3.0/configure --prefix=$tools --libexec=$tools/lib --target=$TARGET --disable-shared --disable-threads --disable-libgomp --disable-libmudflap --disable-libssp --without-headers --with-newlib --with-sysroot=$sysroot --enable-languages=c --disable-multilib
make all-gcc all-target-libgcc                     
make install-gcc install-target-libgcc             
x86_64-slitaz-linux-gcc -v

# Glibc
cd ..
tar xf /home/slitaz/src/glibc-2.23.tar.gz          
cd glibc-2.23/
sed -i 's/3\.79/4.* | &/' configure*                                                          
sed -i -e 's/"db1"/& \&\& $name ne "nss_test1"/' scripts/test-installation.pl                 
sed -i 's|@BASH@|/bin/bash|' elf/ldd.bash.in                                                  
patch -Np1 < /home/slitaz/wok/glibc/stuff/glibc-2.21-gcc6_fix-1.patch                          
patch -Np1 < /home/slitaz/wok/glibc/stuff/glibc-2.21-gcc6_fix-2.patch                          
patch -Np1 < /home/slitaz/wok/glibc/stuff/glibc-2.21-gcc6_fix-3.patch                          
patch -Np1 < /home/slitaz/wok/glibc/stuff/glibc-2.23-gcc.patch                                 
sed -i 's|obstack_compat;|obstack_compat  __attribute__ ((nocommon));|' malloc/obstack.c      
sed -i 's|static const float one=1.0;|static const float __attribute__ ((unused)) one=1.0;|' sysdeps/ieee754/flt-32/s_cosf.c                                              
sed -i 's|static const char rcsid\[\] =|static const char __attribute__ ((unused)) rcsid\[\] =|' resolv/base64.c                                                          

mkdir ../glibc-build
cd ../glibc-build
# thanks openembedded (https://github.com/openembedded/openembedded-core/blob/master/meta/recipes-core/glibc/glibc.inc)
# found ssp flag need to avoid issue with glibc 'undefined reference to __stack_chk_guard'
CFLAGS="-march=nocona -O2 -pipe -fno-stack-protector" BUILD_CC="gcc" CC="${TARGET}-gcc -m64" AR="${TARGET}-ar" RANLIB="${TARGET}-ranlib" libc_cv_ssp_strong=no libc_cv_ssp_all=no libc_cv_ssp=no libc_cv_forced_unwind=yes libc_cv_c_cleanup=yes ../glibc-2.23/configure --prefix=/usr --libexec=/usr/lib64/glibc --host=$TARGET --with-headers=$sysroot/usr/include --with-binutils=$tools/bin --enable-kernel=4.19 --enable-add-ons --enable-obsolete-rpc
make
make install_root=$sysroot install
cd /cross/x86_64/sysroot
ln -s lib64 lib
cd usr/
ln -s lib64 lib
cd /cross/x86_64/source

# GCC final
tar xf /home/slitaz/src/gcc-6.3.0.tar.bz2          
cd gcc-6.3.0/                                      
tar xf /home/slitaz/src/mpfr-4.1.0.tar.xz          
tar xf /home/slitaz/src/gmp-6.2.1.tar.bz2          
tar xf /home/slitaz/src/mpc-1.2.1.tar.gz           
mv mpfr-4.1.0 mpfr                                 
mv mpc-1.2.1 mpc                                   
mv gmp-6.2.1 gmp
mkdir ../gcc-final
cd ../gcc-final
AR=ar ../gcc-6.3.0/configure --prefix=$tools --libexec=$tools/lib --target=$TARGET --enable-shared --enable-c99 --enable-long-long --enable-__cxa_atexit --with-system-zlib --enable-plugin --disable-multilib --disable-libssp --disable-checking --disable-werror --with-pkgversion="SliTaz" --with-bugurl="http://bugs.slitaz.org/" --with-sysroot=$sysroot --enable-languages=c,c++
make AS_FOR_TARGET="${TARGET}-as" LD_FOR_TARGET="${TARGET}-ld"
make install