# Copyright 2001 David Abrahams.
# Copyright 2004, 2005 Markus Schoepflin.
# Copyright 2011, John Maddock
# Copyright 2013, Cray, Inc.
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)

#
# Cray C++ Compiler
# See http://docs.cray.com/books/S-2179-50/html-S-2179-50/S-2179-50-toc.html
#

import feature generators common ;
import toolset : flags ;

feature.extend toolset : cray ;

# Inherit from Unix toolset to get library ordering magic.
toolset.inherit  cray : unix ;

generators.override cray.prebuilt : builtin.lib-generator ;
generators.override cray.prebuilt : builtin.prebuilt ;
generators.override cray.searched-lib-generator : searched-lib-generator ;


rule init ( version ? : command * : options * )
{
    local condition = [ common.check-init-parameters cray : version $(version) ] ;
    
    local command = [ common.get-invocation-command cray : CC : $(command) ] ;
    
    if $(command)
    {
        local root = [ common.get-absolute-tool-path $(command[-1]) ] ;

        if $(root)
        {
            flags cray .root $(condition) : "\"$(root)\"/" ;
        }        
    }      
    # If we can't find 'CC' anyway, at least show 'CC' in the commands
    command ?= CC ;
        
    common.handle-options cray : $(condition) : $(command) : $(options) ;               
}

generators.register-c-compiler cray.compile.c++ : CPP : OBJ : <toolset>cray ;
generators.register-c-compiler cray.compile.c : C : OBJ : <toolset>cray ;


# unlike most compliers, Cray defaults to static linking.
# flags cxx LINKFLAGS <runtime-link>static : -bstatic ;
# flags cray.compile OPTIONS <debug-symbols>on : -G0 ;
flags cray.compile OPTIONS <debug-symbols>on : -g ;
# flags cray.link OPTIONS <debug-symbols>on : -G0 ;
flags cray.link OPTIONS <debug-symbols>on : -g ;

flags cray.compile OPTIONS <optimization>off : -O0 ;
flags cray.compile OPTIONS <optimization>speed : -O2 ;
flags cray.compile OPTIONS <optimization>space : -O1 ;

# flags cray.compile OPTIONS <inlining>off  : -hipa0 ;
# flags cray.compile OPTIONS <inlining>on   : ;
# flags cray.compile OPTIONS <inlining>full : -hipa5 ;

flags cray.compile OPTIONS <cflags> ;
flags cray.compile.c++ OPTIONS <cxxflags> ;
flags cray.compile DEFINES <define> ;
flags cray.compile INCLUDES <include> ;
flags cray.link OPTIONS <linkflags> ;

flags cray.compile OPTIONS : -hgnu -fPIC -h system_alloc -h tolerant -h ipa0 ;
flags cray.compile OPTIONS <link>shared : -dynamic ;
flags cray.compile OPTIONS <link>static : -static ;
flags cray.link OPTIONS <link>static : -static ;
flags cray.link OPTIONS <link>shared ;
flags cray.link LOPTIONS <link>shared : -dynamic ;

flags cray.link LIBPATH <library-path> ;
flags cray.link LIBRARIES <library-file> ;
flags cray.link FINDLIBS-ST <find-static-library> ;
flags cray.link FINDLIBS-SA <find-shared-library> ;

actions link bind LIBRARIES
{
    $(CONFIG_COMMAND) $(OPTIONS) $(LOPTIONS) -o "$(<)" -L$(LIBPATH) "$(>)" "$(LIBRARIES)" -l$(FINDLIBS-ST) -l$(FINDLIBS-SA)
}

# When creating dynamic libraries, we don't want to be warned about unresolved
# symbols, therefore all unresolved symbols are marked as expected by
# '-expect_unresolved *'. This also mirrors the behaviour of the GNU tool
# chain.

actions link.dll bind LIBRARIES
{
    $(CONFIG_COMMAND) -o "$(<[1])" -Wl,-h -Wl,$(<[-1]:D=) -shared -L$(LIBPATH)  "$(>)" "$(LIBRARIES)" -l$(FINDLIBS-ST) -l$(FINDLIBS-SA) $(OPTIONS)
}


# Note: Relaxed ANSI mode (-std) is used for compilation because in strict ANSI
# C89 mode (-std1) the compiler doesn't accept C++ comments in C files. As -std
# is the default, no special flag is needed.
actions compile.c
{
    $(.root:E=)cc -c $(OPTIONS) -D$(DEFINES) -I"$(INCLUDES)" -o "$(<)" "$(>)"
}

# Note: The compiler is forced to compile the files as C++ (-x cxx) because
# otherwise it will silently ignore files with no file extension.
#
# Note: We deliberately don't suppress any warnings on the compiler command
# line, the user can always do this in a customized toolset later on.

actions compile.c++
{
    $(CONFIG_COMMAND) -c $(OPTIONS) -D$(DEFINES) -I"$(INCLUDES)" -o "$(<)" "$(>)"
}

# Always create archive from scratch. See the gcc toolet for rationale.
RM = [ common.rm-command ] ;
actions together piecemeal archive
{
  $(RM) "$(<)"
  ar rc $(<) $(>)
}