#       ==============================================================
#       Copyright (c) 1996-1998 Tim Barbour.
#       Copyright (c) 1998-1999 ACT Financial Systems Pty Ltd.
#       All Rights Reserved.
#       This make library may be used and distributed under the terms
#       of the GNU LGPL, as published by the Free Software Foundation.
#       See the file COPYING for details.
#       ==============================================================
#	$Id: gxx.mk,v 1.13 2001/11/18 10:39:21 trb Exp $	

#-------------------------------------------------------------------------------------------------------
# refers to: GCC GXX GNU_AR GNU_ARFLAGS c_flags cxx_flags cxx_templateflags maybe_checker
#-------------------------------------------------------------------------------------------------------
# provides variables: cxx_stdincs SUPPORTED_TEMPLATE_METHODS TP_EXTERN_LINKAGE compiler_cdebugflags
#                     compiler_cxxdebugflags compiler_bounds_checker_tool COPTIMISEFLAGS CXXOPTIMISEFLAGS EXCEPTIONFLAGS 
#                     cxx_libflags SHLIB_LDFLAGS STATIC_LINK_FLAG
#-------------------------------------------------------------------------------------------------------
# provides commands: c_compiler c_depend c_linker cxx_compiler cxx_depend cxx_linker cxx_libtool
#-------------------------------------------------------------------------------------------------------
#+FIXME trb: why no c_stdincs ?

c_compiler		= $(GCC) $(GCCFLAGS)
c_depend		= $(GCC) -M $(GCCFLAGS) $(c_flags)
c_linker		= $(GCC) $(GCCFLAGS)
c_kernel_module_linker	= $(GNU_LD)
c_version		= $(GCC) --version | head -n 1
c_version_long		= $(GCC) -v 2>&1
cxx_compiler		= $(GXX) $(GCCFLAGS) $(GXXFLAGS)
cxx_depend		= $(GXX) -M $(GCCFLAGS) $(GXXFLAGS) $(cxx_flags)
cxx_linker		= $(GXX) $(GCCFLAGS) $(GXXFLAGS) $(cxx_templateflags)
cxx_template_prelinker  = $(cxx_linker)

# C++ compiler standard include directories
cxx_stdincs		=

SUPPORTED_TEMPLATE_METHODS = Manual Implicit
IMPLICIT_TEMPLATE_FLAGS = -frepo
TP_EXTERN_LINKAGE	= -fno-implicit-templates

compiler_cdebugflags	= -g
# leave out gstabs+ - g++ will use it if appropriate
compiler_cxxdebugflags	= -fno-default-inline
COPTIMISEFLAGS		= -O3
CXXOPTIMISEFLAGS	= 

GCCFLAGS		=
GXXFLAGS		=

cxx_libtool		= $(GNU_AR)
cxx_libflags		= $(GNU_ARFLAGS)

# export this so it can be seen by bounds_checker.sh
export compiler_bounds_checker_tool = $(GNU_CHECKER)

# for dynamic libraries, should rename (above, too)
cxx_liblinker 		= $(GNU_LD)

SHLIB_LDFLAGS 		= -shared
SHLIB_CFLAGS		= -fPIC
STATIC_LINK_FLAG	= -static


# General flags for compiler
# 
# flags for include and library paths
incpathflag				= -I
incfileflag				= -include
libpathflag				= -L

# flag to add path for standard includes
stdincpath_cflag = -isystem

# compile only (no link) flag
compflag				= -c

# define macro flag
defineflag				= -D

# compile output flag
cxxoutflag				= -o

cxx_no_exceptions_flag = -fno-exceptions
cxx_no_rtti_flag = -fno-rtti
cxx_no_weak_symbols_flag = -fno-weak

# often used in kernel ways
c_no_frame_pointer_flag = -fomit-frame-pointer

c_flags_unsuitable_for_cxx = -Wstrict-prototypes -Wdeclaration-after-statement -Wno-pointer-sign -Werror-implicit-function-declaration -ffreestanding

c_kernel_kbuild_unwanted_flags = $(c_flags_unsuitable_for_cxx)

# causes C linker to generate relocatable output
# i.e. generate an output file that can in turn serve as input to ld
# we use -Ur rather than -r, since it can resolve C++ constructors in mixed language programs
# and, especially, kernel-modules
c_linker_relocatable_flag = -Ur

# link output flag, link library flag 
cxxlinkoutflag			= -o
# GNU ar likes this to be empty
cxxlinkstatliboutflag	=
cxxlinklibflag			= -l

c_no_std_includes_flag = -nostdinc
# only use given libraries (except startup files and libgcc)
# the -ffreestanding option seems to have been added to gcc recently, but is not documented in the gcc info
# it is necessary to avoid warnings when compiling kernel headers
c_no_default_libraries_flag = -nodefaultlibs -ffreestanding
# only use given libraries
c_no_standard_libraries_flag = -nostdlib

cxx_no_std_includes_flag = -nostdinc++