#  Copyright (c) 2001 David Abrahams.
#  Copyright (c) 2002-2003 Rene Rivera.
#  Copyright (c) 2002-2003 Vladimir Prus.
#
#  Use, modification and distribution is subject to the Boost Software
#  License Version 1.0. (See accompanying file LICENSE_1_0.txt or
#  http://www.boost.org/LICENSE_1_0.txt)

import toolset : flags ;
import property ;
import generators ;
import os ;
import type ;
import feature ;

feature.extend toolset : gcc ;
feature.subfeature toolset gcc : version : : optional propagated link-incompatible ;

# Make the "o" suffix used for gcc toolset on all
# platforms
type.set-generated-target-suffix OBJ : <toolset>gcc : o ;
type.set-generated-target-suffix STATIC_LIB : <toolset>gcc : a ;


# Initializes the gcc toolset
# Each argument has the form:
#    version binary-name [path]
# And specifies the name / path that should be used to invoke
# the specified gcc version. The default version will be always called
# with 'g++'.
rule init ( a1 * : a2 * : a3 * )
{
    if $(a1)
    {
        local version = $(a1[1]) ;
        local name = $(a1[2]) ;
        local path = $(a1[3]) ;
        
        feature.extend-subfeature toolset gcc : version : $(version) ;
            
        flags gcc NAME <toolset>gcc-$(version) : $(name) ;
        
        # TODO: set path accordingly.
    }    
}

if [ os.name ] = NT
{
    # This causes single-line command invocation to not go through
    # .bat files, thus avoiding command-line length limitations
    JAMSHELL = % ;  
}

# Declare generators
generators.register-linker gcc.link : LIB OBJ : EXE : <toolset>gcc ;
generators.register-composing gcc.archive : OBJ : STATIC_LIB : <toolset>gcc ;
generators.register-linker gcc.link.dll : LIB OBJ : SHARED_LIB : <toolset>gcc ;
generators.register-c-compiler gcc.compile.c++ : CPP : OBJ : <toolset>gcc ;
generators.register-c-compiler gcc.compile.c : C : OBJ : <toolset>gcc ;


# Declare flags and action for compilation
flags gcc.compile OPTIONS <optimization>off : -O0 ;
flags gcc.compile OPTIONS <optimization>speed : -O3 ;
flags gcc.compile OPTIONS <optimization>space : -Os ;

flags gcc.compile OPTIONS <inlining>off : -fno-inline ;
flags gcc.compile OPTIONS <inlining>on : -Wno-inline ;
flags gcc.compile OPTIONS <inlining>full : -finline-functions -Wno-inline ;

flags gcc.compile OPTIONS <debug-symbols>on : -g ;
flags gcc.compile OPTIONS <profiling>on : -pg ;

flags gcc.compile OPTIONS <cflags> ;
flags gcc.compile.c++ OPTIONS <cxxflags> ;
flags gcc.compile DEFINES <define> ;
flags gcc.compile INCLUDES <include> ;

actions compile.c++
{
    $(NAME:E=g++) -x c++ -Wall -ftemplate-depth-100 $(OPTIONS) -D$(DEFINES) -I"$(INCLUDES)" -c -o "$(<)" "$(>)" 
}

actions compile.c
{
    $(NAME:E=gcc) -x c -Wall $(OPTIONS) -D$(DEFINES) -I"$(INCLUDES)" -c -o "$(<)" "$(>)" 
}


# Declare flags and action for linking
flags gcc.link OPTIONS <debug-symbols>on : -g ;
# Strip the binary when no debugging is needed.
flags gcc.link OPTIONS <debug-symbols>off : -s ;
flags gcc.link OPTIONS <profiling>on : -pg ;
flags gcc.link OPTIONS <linkflags> ;
flags gcc.link LINKPATH <library-path> ;
flags gcc.link FINDLIBS-ST <find-static-library> ;
flags gcc.link FINDLIBS-SA <find-shared-library> ;
flags gcc.link LIBRARIES <library-file> ;
flags gcc.link LINK-RUNTIME <link-runtime>static : static ;
flags gcc.link LINK-RUNTIME <link-runtime>shared : dynamic ;
flags gcc.link RPATH <dll-path> ;

rule link ( targets * : sources * : properties * )
{
    SPACE on $(targets) = " " ;    
}

actions link bind LIBRARIES
{
    $(NAME:E=g++) $(OPTIONS) -L"$(LINKPATH)" -Wl,-R$(SPACE)-Wl,"$(RPATH)" -o "$(<)" "$(>)" "$(LIBRARIES)" -Wl,-Bdynamic -l$(FINDLIBS-SA) -Wl,-Bstatic -l$(FINDLIBS-ST) "$(LIBRARIES)" -Wl,-Bdynamic -l$(FINDLIBS-SA) -Wl,-Bstatic -l$(FINDLIBS-ST) -Wl,-B$(LINK-RUNTIME)
}

# Declare action for creating static libraries
actions piecemeal archive 
{
    ar ur "$(<)" "$(>)"
}


rule link.dll ( targets * : sources * : properties * )
{
    SPACE on $(targets) = " " ;    
}

# Differ from 'link' above only by -shared.
actions link.dll bind LIBRARIES
{
    $(NAME:E=g++) $(OPTIONS) -L"$(LINKPATH)" -Wl,-R$(SPACE)-Wl,"$(RPATH)" -o "$(<)" -Wl,-h$(SPACE)-Wl,$(<[1]:D=) -shared "$(>)"  "$(LIBRARIES)" -Wl,-Bdynamic -l$(FINDLIBS-SA) -Wl,-Bstatic -l$(FINDLIBS-ST) "$(LIBRARIES)" -Wl,-Bdynamic -l$(FINDLIBS-SA) -Wl,-Bstatic -l$(FINDLIBS-ST) -Wl,-B$(LINK-RUNTIME)
}

# Set up threading support. It's somewhat contrived, so perform it at the end,
# to avoid cluttering other code.

if [ os.on-windows ] 
{
    flags gcc OPTIONS <threading>multi : -mthreads ;
}
else if [ modules.peek : UNIX ] 
{
    switch [ modules.peek : JAMUNAME ]
    {
    case SunOS* :
        {
        flags gcc OPTIONS <threading>multi : -pthreads ;
        flags gcc FINDLIBS <threading>multi : rt ;
        }
    case BeOS :
        {
        # BeOS has no threading options, don't set anything here.
        }
    case *BSD :
        {
        flags gcc OPTIONS <threading>multi : -pthread ;
        # there is no -lrt on BSD
        }
    case IRIX :
        {
        # gcc on IRIX does not support multi-threading, don't set anything here.
        }
    case HP_UX :
        {
        # gcc on HP-UX does not support multi-threading, don't set anything here
        }
    case * :
        {
        flags gcc OPTIONS <threading>multi : -pthread ;
        flags gcc FINDLIBS <threading>multi : rt ;
        }
    }
}