#!/usr/bin/env perl
use strict;
use warnings;

my ($cc,$cflags,$asm,$ld,$ldflags,$libgcc,$cmake);

$cmake = 'cmake';

if ($^O =~ /darwin/){
    $cc      = $ENV{CBC_LANG_COMPILER};
    $cflags  = qq|-Wall -g -arch arm -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -Werror -I. -g -O0 
             -Wno-macro-redefined -Wno-gnu-designator -Wno-sometimes-uninitialized -Wno-tautological-compare 
             -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include
             -Wno-nullability-completeness -Wno-expansion-to-defined"|;
    $ldflags = qq|-B/mnt/dalmore-home/one/src/armgcc/cross/bin/arm-none-eabi-  
             -DCBCXV6=1 -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -I. -g -O0|;
} else {
    $cc     = '/mnt/dalmore-home/one/src/armgcc/cross/bin/arm-none-eabi-gcc';
    $asm    = $cc;
    $cflags = qq|-B/mnt/dalmore-home/one/src/armgcc/cross/bin/arm-none-eabi-  
             -DCBCXV6=1 -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -I. -g -O0|;
    $ld     = '/mnt/dalmore-home/one/src/armgcc/cross/bin/arm-none-eabi-ld';
    chomp($libgcc = `$cc --print-libgcc-file-name`);
    $cflags .= " $libgcc";
    $cmake  .= 3;
    $ldflags = " -L. -T kernel-cmake.ld $libgcc -b binary initcode fs.img";
}

$cflags =~ s/\n//g;
create_link_script();
#cmake -DCMAKE_LINKER=/path/to/linker -DCMAKE_CXX_LINK_EXECUTABLE="<CMAKE_LINKER> <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>"
print_exec_system($cmake, "-DCBC_COM=$cc", "-DPMAKE_ARGS=\"$cflags\"","-DCMAKE_ASM_COMPILER=$cc","-DCMAKE_LINKER=$ld","-DCMAKE_C_LINK_EXECUTABLE=\"$ld $ldflags  <OBJECTS> -o kernel.elf\"","-DCMAKE_INSTALL_RPATH_USE_LINK_PATH=TRUE",'.');
system("make");
system("sh","link.sh");

sub create_link_script {
  my @link_script;
  while (my $line = <DATA>){
    $line =~ s/LD/$ld/;
    $line =~ s/LIBGCC/$libgcc/;
    push @link_script,$line;
  }
  if ($^O =~ /darwin/){
    for (@link_script){
       s/CMakeFiles/build/;
       s|kernel\.dir/||;
    }
  }
  open my $fh, '>', 'link.sh';
  print $fh "@link_script";
}

sub print_exec_system {
  my @query = @_;
  print(join(' ',@query), "\n");
  system(join(' ',@query));
}

__DATA__
cp  initcode ./CMakeFiles/kernel.dir/initcode 
cp  fs.img ./CMakeFiles/kernel.dir/fs.img

LD \
-L. \
-T \
kernel-cmake.ld \
-o \
kernel.elf \
 \
CMakeFiles/kernel.dir/lib/string.c.o \
CMakeFiles/kernel.dir/arm.c.o \
CMakeFiles/kernel.dir/asm.S.o \
CMakeFiles/kernel.dir/bio.c.o \
CMakeFiles/kernel.dir/buddy.c.o \
CMakeFiles/kernel.dir/c/console.c.o \
CMakeFiles/kernel.dir/exec.c.o \
CMakeFiles/kernel.dir/c/file.c.o \
CMakeFiles/kernel.dir/fs.c.o \
CMakeFiles/kernel.dir/log.c.o \
CMakeFiles/kernel.dir/main.c.o \
CMakeFiles/kernel.dir/memide.c.o \
CMakeFiles/kernel.dir/c/pipe.c.o \
CMakeFiles/kernel.dir/c/proc.c.o \
CMakeFiles/kernel.dir/c/spinlock.c.o \
CMakeFiles/kernel.dir/start.c.o \
CMakeFiles/kernel.dir/swtch.S.o \
CMakeFiles/kernel.dir/c/syscall.c.o \
CMakeFiles/kernel.dir/c/sysfile.c.o \
CMakeFiles/kernel.dir/sysproc.c.o \
CMakeFiles/kernel.dir/trap_asm.S.o \
CMakeFiles/kernel.dir/trap.c.o \
CMakeFiles/kernel.dir/vm.c.o \
CMakeFiles/kernel.dir/device/picirq.c.o \
CMakeFiles/kernel.dir/device/timer.c.o \
CMakeFiles/kernel.dir/device/uart.c.o \
CMakeFiles/kernel.dir/entry.S.o \
CMakeFiles/kernel.dir/c/kernel-context.c.o \
 \
 \
LIBGCC \
 \
-b \
binary \
initcode \
fs.img