# -*- mode:python -*-

# Copyright (c) 2004-2005 The Regents of The University of Michigan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Nathan Binkert

import os, subprocess

Import('env')

elf_files = []
def ElfFile(filename):
    elf_files.append(File(filename))

ElfFile('elf.c')
ElfFile('elf_begin.c')
ElfFile('elf_cntl.c')
ElfFile('elf_data.c')
ElfFile('elf_end.c')
ElfFile('elf_errmsg.c')
ElfFile('elf_errno.c')
ElfFile('elf_fill.c')
ElfFile('elf_flag.c')
ElfFile('elf_getarhdr.c')
ElfFile('elf_getarsym.c')
ElfFile('elf_getbase.c')
ElfFile('elf_getident.c')
ElfFile('elf_hash.c')
ElfFile('elf_kind.c')
ElfFile('elf_memory.c')
ElfFile('elf_next.c')
ElfFile('elf_open.c')
ElfFile('elf_phnum.c')
ElfFile('elf_rand.c')
ElfFile('elf_rawfile.c')
ElfFile('elf_scn.c')
ElfFile('elf_shnum.c')
ElfFile('elf_shstrndx.c')
ElfFile('elf_strptr.c')
ElfFile('elf_update.c')
ElfFile('elf_version.c')
ElfFile('gelf_cap.c')
ElfFile('gelf_checksum.c')
ElfFile('gelf_dyn.c')
ElfFile('gelf_ehdr.c')
ElfFile('gelf_fsize.c')
ElfFile('gelf_getclass.c')
ElfFile('gelf_move.c')
ElfFile('gelf_phdr.c')
ElfFile('gelf_rel.c')
ElfFile('gelf_rela.c')
ElfFile('gelf_shdr.c')
ElfFile('gelf_sym.c')
ElfFile('gelf_syminfo.c')
ElfFile('gelf_symshndx.c')
ElfFile('gelf_xlate.c')
ElfFile('libelf.c')
ElfFile('libelf_align.c')
ElfFile('libelf_allocate.c')
ElfFile('libelf_ar.c')
ElfFile('libelf_ar_util.c')
ElfFile('libelf_checksum.c')
ElfFile('libelf_data.c')
ElfFile('libelf_ehdr.c')
ElfFile('libelf_extended.c')
ElfFile('libelf_memory.c')
ElfFile('libelf_open.c')
ElfFile('libelf_phdr.c')
ElfFile('libelf_shdr.c')
ElfFile('libelf_xlate.c')

ElfFile('libelf_convert.c')
ElfFile('libelf_fsize.c')
ElfFile('libelf_msize.c')

m4env = env.Clone()
if m4env['GCC']:
    m4env.Append(CCFLAGS=['-Wno-pointer-sign',
                          '-Wno-unused-but-set-variable',
                          '-Wno-implicit-function-declaration',
                          '-Wno-override-init'])
if m4env['CLANG']:
    m4env.Append(CCFLAGS=['-Wno-initializer-overrides', '-Wno-pointer-sign'])
    # clang defaults to c99 (while gcc defaults to gnu89) and there is a
    # difference in the handling of inlining functions which causes
    # linking problems with multiple definitions of the symbols in
    # sysmacros.h for older versions of glibc
    m4env.Append(CCFLAGS=['-std=gnu89'])
m4env.Append(CCFLAGS=['-Wno-implicit', '-Wno-undef'])
del m4env['CPPPATH']

# If we have gm4 use it
if m4env.Detect('gm4'):
    m4env['M4'] = 'gm4'

# Check that m4 is available
import SCons.Tool.m4
if not SCons.Tool.m4.exists(m4env):
   print("Error: Can't find version of M4 macro processor.  " +
         "Please install M4 and try again.")
   Exit(1)

# Setup m4 tool
m4env.Tool('m4')

m4env.Append(M4FLAGS=['-DSRCDIR=%s' % Dir('.').srcnode().path])
m4env['M4COM'] = '$M4 $M4FLAGS $SOURCES > $TARGET'
m4env.M4(target=File('libelf_convert.c'),
         source=[File('elf_types.m4').srcnode(),
                 File('libelf_convert.m4').srcnode()])
m4env.M4(target=File('libelf_fsize.c'),
         source=[File('elf_types.m4').srcnode(),
                 File('libelf_fsize.m4').srcnode()])
m4env.M4(target=File('libelf_msize.c'),
         source=[File('elf_types.m4').srcnode(),
                 File('libelf_msize.m4').srcnode()])

m4env.Append(CPPPATH=[Dir('.'), Dir('.').srcnode()])

# Build libelf as a static library with PIC code so it can be linked
# into either m5 or the library
m4env.Library('elf', [m4env.SharedObject(f) for f in elf_files])

# Generate the native-elf-format header file based on the build system
m4env.Command(File('native-elf-format.h'), File('native-elf-format'),
              '${SOURCE} > ${TARGET}')

env.Prepend(CPPPATH=Dir('.').srcnode())
env.Append(LIBS=[File('libelf.a')])
env.Prepend(LIBPATH=[Dir('.')])