#!/bin/sh

echo "*** PREPARE GLIBC BEGIN ***"

global SRC_DIR := $[pwd]

# Save the kernel installation directory.
global KERNEL_INSTALLED := "$[pwd]/work/kernel/kernel_installed"

cd work/glibc

echo "Preparing glibc. This may take a while..."

rm -rf glibc_prepared
cp -r glibc_installed glibc_prepared

cd glibc_prepared

# Create custom 'usr' area and link it with some of the kernel header directories.
# BusyBox compilation process uses these linked directories. The following
# directories are affected:
#
# usr (glibc)
# |
# +--include (glibc)
# |  |
# |  +--asm (kernel)
# |  |
# |  +--asm-generic (kernel)
# |  |
# |  +--linux (kernel)
# |  |
# |  +--mtd (kernel)
# |
# +--lib (glibc)

mkdir -p usr
cd usr

ln -s ../include include
ln -s ../lib lib

cd ../include

ln -s $KERNEL_INSTALLED/include/linux linux
ln -s $KERNEL_INSTALLED/include/asm asm
ln -s $KERNEL_INSTALLED/include/asm-generic asm-generic
ln -s $KERNEL_INSTALLED/include/mtd mtd

cd $SRC_DIR

echo "*** PREPARE GLIBC END ***"

(CommandList
  children: [
    (C {(echo)} {(DQ ("*** PREPARE GLIBC BEGIN ***"))})
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:SRC_DIR)
          op: Equal
          rhs: 
            {
              (CommandSubPart
                command_list: (CommandList children:[(C {(pwd)})])
                left_token: <Left_CommandSub "$(">
                spids: [12 14]
              )
            }
          spids: [11]
        )
      ]
      spids: [11]
    )
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:KERNEL_INSTALLED)
          op: Equal
          rhs: 
            {
              (CommandSubPart
                command_list: (CommandList children:[(C {(pwd)})])
                left_token: <Left_CommandSub "$(">
                spids: [21 23]
              ) (/work/kernel/kernel_installed)
            }
          spids: [20]
        )
      ]
      spids: [20]
    )
    (C {(cd)} {(work/glibc)})
    (C {(echo)} {(DQ ("Preparing glibc. This may take a while..."))})
    (C {(rm)} {(-rf)} {(glibc_prepared)})
    (C {(cp)} {(-r)} {(glibc_installed)} {(glibc_prepared)})
    (C {(cd)} {(glibc_prepared)})
    (C {(mkdir)} {(-p)} {(usr)})
    (C {(cd)} {(usr)})
    (C {(ln)} {(-s)} {(../include)} {(include)})
    (C {(ln)} {(-s)} {(../lib)} {(lib)})
    (C {(cd)} {(../include)})
    (C {(ln)} {(-s)} {($ VSub_Name "$KERNEL_INSTALLED") (/include/linux)} {(linux)})
    (C {(ln)} {(-s)} {($ VSub_Name "$KERNEL_INSTALLED") (/include/asm)} {(asm)})
    (C {(ln)} {(-s)} {($ VSub_Name "$KERNEL_INSTALLED") (/include/asm-generic)} {(asm-generic)})
    (C {(ln)} {(-s)} {($ VSub_Name "$KERNEL_INSTALLED") (/include/mtd)} {(mtd)})
    (C {(cd)} {($ VSub_Name "$SRC_DIR")})
    (C {(echo)} {(DQ ("*** PREPARE GLIBC END ***"))})
  ]
)