Import("*")
import os
import glob
from os.path import join

arch = "arm"
platform = "pb926"

variant1 = "userspace"
variant2 = "baremetal"

builddir_var1 = join("build", variant1)
builddir_var2 = join("build", variant2)
crt0bdir_var1 = join("build", "crt")
crt0bdir_var2 = join("build", "crt")

BuildDir(builddir_var1, "src")
BuildDir(builddir_var2, "src")
BuildDir(crt0bdir_var1, "crt")
BuildDir(crt0bdir_var2, "crt")

headers_var1 = ["#include", "#include/sys-%s/arch-%s" % (variant1, arch)]
headers_var2 = ["#include", "#include/sys-%s/arch-%s" % (variant2, arch)]

env_var1 = Environment(CC = 'arm-none-linux-gnueabi-gcc',
		  CCFLAGS = ['-g', '-nostdinc', '-nostdlib', '-ffreestanding'],
		  LINKFLAGS = ['-nostdlib'],
		  ENV = {'PATH' : os.environ['PATH']},
		  LIBS = 'gcc',
		  CPPPATH = headers_var1)

env_var2 = Environment(CC = 'arm-none-linux-gnueabi-gcc',
		       	CCFLAGS = ['-g', '-nostdinc', '-nostdlib', '-ffreestanding'],
			LINKFLAGS = ['-nostdlib'],
			ENV = {'PATH' : os.environ['PATH']},
			LIBS = 'gcc',
			CPPPATH = headers_var2)

def src_glob(src_base, src_paths, builddir):
    """Src glob is used to find source files easily e.g: src_glob("src/*.c"),
    the reason we can't just use glob is due to the way SCons handles out
    of directory builds."""
    search = os.path.join(src_base, src_paths)
    dir = os.path.dirname(search)
    if dir != "":
        dir = dir + os.sep
    src_path = Dir('.').srcnode().abspath
    files = glob.glob(src_path + os.sep + search)
    files = map(os.path.basename, files)
    ret_files = []
    for file in files:
        ret_files.append(builddir + dir[len(src_base):] + file)
    return ret_files

src_var1 = src_glob("src", "*.c", builddir_var1) + \
	src_glob("src", "sys-%s/*.c" % variant1, builddir_var1) + \
	src_glob("src", "sys-%s/arch-%s/*.c" % (variant1, arch), builddir_var1) + \
	src_glob("src", "sys-%s/arch-%s/plat-%s/*.c" % (variant1, arch, platform), builddir_var1) + \
	src_glob("src", "arch-%s/*.S" % arch, builddir_var1) + \
	src_glob("src", "arch-%s/*.c" % arch, builddir_var1)

src_var2 = src_glob("src", "*.c", builddir_var2) + \
	src_glob("src", "sys-%s/*.c" % variant2, builddir_var2) + \
	src_glob("src", "sys-%s/arch-%s/*.c" % (variant2, arch), builddir_var2) + \
	src_glob("src", "sys-%s/arch-%s/plat-%s/*.c" % (variant2, arch, platform), builddir_var2) + \
	src_glob("src", "arch-%s/*.S" % arch, builddir_var2) + \
	src_glob("src", "arch-%s/*.c" % arch, builddir_var2)

crt_var1 = env_var1.StaticObject(src_glob("crt", \
		"sys-%s/arch-%s/crt0.S" % (variant1, arch), crt0bdir_var1), ASFLAGS=env_var1["CCFLAGS"])

crt_var2 = env_var2.StaticObject(src_glob("crt", \
		"sys-%s/arch-%s/crt0.S" % (variant2, arch), crt0bdir_var2), ASFLAGS=env_var2["CCFLAGS"])

libc_var1 = env_var1.StaticLibrary(join("build",variant1) + "/c-" + variant1, src_var1)
libc_var2 = env_var2.StaticLibrary(join("build",variant2) + "/c-" + variant2, src_var2)