# (C) Copyright David Abrahams 2001. Permission to copy, use,
# modify, sell and distribute this software is granted provided this
# copyright notice appears in all copies. This software is provided
# "as is" without express or implied warranty, and with no claim as
# to its suitability for any purpose.

# compute directories for invoking GCC
SPACE ?= " " ;
GCC_BIN_DIRECTORY ?= $(GCC_ROOT_DIRECTORY)$(SLASH)bin$(SLASH) ;
GCC_BIN_DIRECTORY ?= "" ; # Don't clobber tool names if GCC_ROOT_DIRECTORY not set
GCC_INCLUDE_DIRECTORY ?= $(GCC_ROOT_DIRECTORY)$(SLASH)include ;
GCC_STDLIB_DIRECTORY ?= $(GCC_ROOT_DIRECTORY)$(SLASH)lib ;

flags gcc LINKFLAGS <runtime-link>static : -static ;
flags gcc CFLAGS <debug-symbols>on : -g ;
flags gcc LINKFLAGS <debug-symbols>on : -g ;
flags gcc CFLAGS <optimization>off : -O0 ;
flags gcc CFLAGS <optimization>speed : -O3 ;

# Other optimizations we might want for GCC
# -fforce-mem -fomit-frame-pointer
# -foptimize-sibling-calls -finline-functions -ffast-math -finline-limit=10000

flags gcc CFLAGS <optimization>space : -Os ;
flags gcc CFLAGS <inlining>off : -fno-inline ;
flags gcc CFLAGS <inlining>on : -Wno-inline ;
flags gcc CFLAGS <inlining>full : -finline-functions -Wno-inline ;

#
# set threading options for various platforms:
#
if $(NT)
{
    flags gcc CFLAGS <threading>multi : -mthreads ;
}
else if $(UNIX)
{
    switch $(JAMUNAME)
    {
    case CYGWIN* :
        {
        flags gcc CFLAGS <threading>multi : -mthreads ;
        }
    case SunOS* :
        {
        flags gcc CFLAGS <threading>multi : -pthreads ;
        flags gcc LINKFLAGS <threading>multi : -pthreads ;
        flags gcc FINDLIBS <threading>multi : rt ;
        NO_GNU_LN = true ; # sun seems not to use the GNU linker with gcc
        }
    case BeOS :
        {
        # BeOS has no threading options, don't set anything here.
        }
    case Darwin :
        {
        # MacOS X, doesn't need any threading options set
        # -lpthread is linked to by default.
        # There is no gcc/g++, we need to use cc/c++ instead:
        GCC ?= cc ;
        GXX ?= c++ ;
        }
    case * :
        {
        flags gcc CFLAGS <threading>multi : -pthread ;
        flags gcc LINKFLAGS <threading>multi : -pthread ;
        flags gcc FINDLIBS <threading>multi : rt ;
        }
    }
}

#
# define compiler names if not set:
GCC ?= gcc ;
GXX ?= g++ ;


flags gcc CFLAGS <profiling>on : -pg ;
flags gcc LINKFLAGS <profiling>on : -pg ;

flags gcc C++FLAGS <rtti>off : -fno-rtti ;

flags gcc CFLAGS <cflags> ;
flags gcc C++FLAGS <cxxflags> ;
flags gcc DEFINES <define> ;
flags gcc UNDEFS <undef> ;
flags gcc HDRS <include> ;
flags gcc STDHDRS <sysinclude> ;
flags gcc LINKFLAGS <linkflags> ;
flags gcc LINKFLAGS <debug-symbols>off : -s ;
flags gcc ARFLAGS <arflags> ;

flags gcc STDHDRS : $(GCC_INCLUDE_DIRECTORY) ;
flags gcc STDLIBPATH : $(GCC_STDLIB_DIRECTORY) ;

if ! $(ARFLAGS)
{
    flags gcc ARFLAGS : "" ;
}

if ! $(NT) # The compiler complains about -fPIC on NT
{
    flags gcc CFLAGS <shared-linkable>true : -fPIC ;
    flags gcc LINKFLAGS <shared-linkable>true : -fPIC ;
}


if $(BETOOLS)
{
    flags gcc LINKFLAGS <target-type>$(SHARED_TYPES) : -nostart ;
}
else
{
    flags gcc LINKFLAGS <target-type>$(SHARED_TYPES) : -shared ;
}

flags gcc LIBPATH <library-path> ;
flags gcc NEEDLIBS <library-file> ;
flags gcc FINDLIBS <find-library> ;

flags gcc DLLVERSION <dllversion> ;
if $(DLLVERSION)
{
	DLLVERSION = $(DLLVERSION[1]) ;
}
else
{
	DLLVERSION = $(BOOST_VERSION) ;
}

#### Link ####

rule Link-action
{
    # This will appear before the import library name when building a DLL, but
    # will be "multiplied away" otherwise. The --exclude-symbols directive
    # proved to be neccessary with some versions of Cygwin.
    IMPLIB_COMMAND on $(<) = "-Wl,--export-all-symbols -Wl,--exclude-symbols,_bss_end__:_bss_start__:_data_end__:_data_start__ -Wl,--out-implib," ;
    DEPENDS $(<) : $(NEEDLIBS) ;
    gRUN_LD_LIBRARY_PATH($(<)) += $(GCC_STDLIB_DIRECTORY) ;
    if $(<[2]) && $(NT) && ( -mno-cygwin in $(gBUILD_PROPERTIES:G=) )
    {
        gcc-dllwrap $(<) : $(>) ;
    }
    else
    {
        gcc-Link-action $(<) : $(>) ;
    }
}

# for gcc, we repeat all libraries so that dependencies are always resolved
if $(NO_GNU_LN)
{
  # if we don't have a GNU linker then we can't pass any GNU-ld specific flags:
  actions gcc-Link-action bind NEEDLIBS
  {
    $(GCC_BIN_DIRECTORY)$(GXX) $(IMPLIB_COMMAND)$(<[2]) $(LINKFLAGS) -o "$(<[1])" -L$(LIBPATH:T) -L$(STDLIBPATH:T) "$(>)" "$(NEEDLIBS)" "$(NEEDLIBS)" -l$(FINDLIBS)
  }
}
else
{
  actions gcc-Link-action bind NEEDLIBS
  {
    $(SHELL_SET)LD_LIBRARY_PATH=$(RUN_LD_LIBRARY_PATH)
    $(SHELL_EXPORT)LD_LIBRARY_PATH
    $(GCC_BIN_DIRECTORY)$(GXX) $(IMPLIB_COMMAND)$(<[2]) $(LINKFLAGS) -o "$(<[1])" -L$(LIBPATH:T) -L$(STDLIBPATH:T) "$(>)" "$(NEEDLIBS)" "$(NEEDLIBS)" -l$(FINDLIBS) -Wl,-rpath-link,. -Wl,-soname,$(<[1]:D=).$(DLLVERSION)
  }
}

actions gcc-dllwrap bind NEEDLIBS
{
    dllwrap --dllname $(<[1]) -o foo.pyd $(>) -s --entry _DllMain@12 --target=i386-mingw32 -L$(LIBPATH:T) -L$(STDLIBPATH:T) "$(>)" "$(NEEDLIBS)" "$(NEEDLIBS)" -l$(FINDLIBS) -Wl,-rpath-link,. $(LINKFLAGS)     
}

#### Cc #####

rule Cc-action
{
    gcc-Cc-action $(<) : $(>) ;
}

actions gcc-Cc-action
{
    $(GCC_BIN_DIRECTORY)$(GCC) -c -Wall -U$(UNDEFS) -D$(DEFINES) $(CFLAGS) -I"$(HDRS)" -isystem$(SPACE)"$(STDHDRS)" -o "$(<)" "$(>)"
}

#### C++ ####
rule C++-action
{
    gcc-C++-action $(<) : $(>) ;
}

actions gcc-C++-action
{
    $(GCC_BIN_DIRECTORY)$(GXX) -c -Wall -ftemplate-depth-100 -U$(UNDEFS) -D$(DEFINES) $(CFLAGS) $(C++FLAGS) -I"$(HDRS)" -isystem$(SPACE)"$(STDHDRS)" -o "$(<)" "$(>)"
}

#### Archive ####

rule Archive-action
{
    gcc-Archive-action $(<) : $(>) ;
}

actions updated together piecemeal gcc-Archive-action
{
    ar ru$(ARFLAGS) "$(<:T)" "$(>:T)"
}