move default construction variables into one place

lib/rscons/builders/cfile.rb

@@ -8,17 +8,6 @@ module Rscons
     #   env.CFile("lex.yy.cc", "parser.ll")
     class CFile < Builder
 
-      Rscons.application.default_varset.append(
-        "YACC" => "bison",
-        "YACC_FLAGS" => ["-d"],
-        "YACC_CMD" => ["${YACC}", "${YACC_FLAGS}", "-o", "${_TARGET}", "${_SOURCES}"],
-        "YACCSUFFIX" => [".y", ".yy"],
-        "LEX" => "flex",
-        "LEX_FLAGS" => [],
-        "LEX_CMD" => ["${LEX}", "${LEX_FLAGS}", "-o", "${_TARGET}", "${_SOURCES}"],
-        "LEXSUFFIX" => [".l", ".ll"],
-      )
-
       # Run the builder to produce a build target.
       def run(options)
         if @command

lib/rscons/builders/disassemble.rb

@@ -3,12 +3,6 @@ module Rscons
     # The Disassemble builder produces a disassembly listing of a source file.
     class Disassemble < Builder
 
-      Rscons.application.default_varset.append(
-        "OBJDUMP" => "objdump",
-        "DISASM_CMD" => ["${OBJDUMP}", "${DISASM_FLAGS}", "${_SOURCES}"],
-        "DISASM_FLAGS" => ["--disassemble", "--source"],
-      )
-
       # Run the builder to produce a build target.
       def run(options)
         if @command

lib/rscons/builders/library.rb

@@ -3,13 +3,6 @@ module Rscons
     # A default Rscons builder that produces a static library archive.
     class Library < Builder
 
-      Rscons.application.default_varset.append(
-        'AR' => 'ar',
-        'LIBSUFFIX' => '.a',
-        'ARFLAGS' => ['rcs'],
-        'ARCMD' => ['${AR}', '${ARFLAGS}', '${_TARGET}', '${_SOURCES}']
-      )
-
       # Create an instance of the Builder to build a target.
       def initialize(options)
         super(options)

lib/rscons/builders/object.rb

@@ -12,47 +12,6 @@ module Rscons
         "DC" => "DSUFFIX",
       }
 
-      Rscons.application.default_varset.append(
-        'OBJSUFFIX' => ['.o'],
-        'DEPFILESUFFIX' => '.mf',
-
-        'CPPDEFPREFIX' => '-D',
-        'INCPREFIX' => '-I',
-
-        'AS' => '${CC}',
-        'ASFLAGS' => [],
-        'ASSUFFIX' => ['.S'],
-        'ASPPPATH' => '${CPPPATH}',
-        'ASPPFLAGS' => '${CPPFLAGS}',
-        'ASDEPGEN' => ['-MMD', '-MF', '${_DEPFILE}'],
-        'ASCMD' => ['${AS}', '-c', '-o', '${_TARGET}', '${ASDEPGEN}', '${INCPREFIX}${ASPPPATH}', '${ASPPFLAGS}', '${ASFLAGS}', '${_SOURCES}'],
-
-        'CPPFLAGS' => ['${CPPDEFPREFIX}${CPPDEFINES}'],
-        'CPPDEFINES' => [],
-        'CPPPATH' => [],
-
-        'CCFLAGS' => [],
-
-        'CC' => 'gcc',
-        'CFLAGS' => [],
-        'CSUFFIX' => ['.c'],
-        'CCDEPGEN' => ['-MMD', '-MF', '${_DEPFILE}'],
-        'CCCMD' => ['${CC}', '-c', '-o', '${_TARGET}', '${CCDEPGEN}', '${INCPREFIX}${CPPPATH}', '${CPPFLAGS}', '${CFLAGS}', '${CCFLAGS}', '${_SOURCES}'],
-
-        'CXX' => 'g++',
-        'CXXFLAGS' => [],
-        'CXXSUFFIX' => ['.cc', '.cpp', '.cxx', '.C'],
-        'CXXDEPGEN' => ['-MMD', '-MF', '${_DEPFILE}'],
-        'CXXCMD' =>['${CXX}', '-c', '-o', '${_TARGET}', '${CXXDEPGEN}', '${INCPREFIX}${CPPPATH}', '${CPPFLAGS}', '${CXXFLAGS}', '${CCFLAGS}', '${_SOURCES}'],
-
-        'DC' => 'gdc',
-        'DFLAGS' => [],
-        'DSUFFIX' => ['.d'],
-        'DDEPGEN' => ['-MMD', '-MF', '${_DEPFILE}'],
-        'D_IMPORT_PATH' => [],
-        'DCCMD' => ['${DC}', '-c', '-o', '${_TARGET}', '${DDEPGEN}', '${INCPREFIX}${D_IMPORT_PATH}', '${DFLAGS}', '${_SOURCES}'],
-      )
-
       class << self
         # Return whether this builder object is capable of producing a given target
         # file name from a given source file name.

lib/rscons/builders/preprocess.rb

@@ -5,12 +5,6 @@ module Rscons
     # The Preprocess builder invokes the C preprocessor
     class Preprocess < Builder
 
-      Rscons.application.default_varset.append(
-        "CPP_CMD" => %w[
-          ${_PREPROCESS_CC} -E ${_PREPROCESS_DEPGEN}
-          -o ${_TARGET} ${INCPREFIX}${CPPPATH} ${CPPFLAGS} ${_SOURCES}],
-      )
-
       # Run the builder to produce a build target.
       def run(options)
         if @command

lib/rscons/builders/program.rb

@@ -4,19 +4,6 @@ module Rscons
     # executable program.
     class Program < Builder
 
-      Rscons.application.default_varset.append(
-        'OBJSUFFIX' => '.o',
-        'PROGSUFFIX' => (Object.const_get("RUBY_PLATFORM") =~ /mingw|cygwin/ ? ".exe" : ""),
-        'LD' => nil,
-        'LIBSUFFIX' => '.a',
-        'LDFLAGS' => [],
-        'LIBPATH' => [],
-        'LIBDIRPREFIX' => '-L',
-        'LIBLINKPREFIX' => '-l',
-        'LIBS' => [],
-        'LDCMD' => ['${LD}', '-o', '${_TARGET}', '${LDFLAGS}', '${_SOURCES}', '${LIBDIRPREFIX}${LIBPATH}', '${LIBLINKPREFIX}${LIBS}']
-      )
-
       # Create an instance of the Builder to build a target.
       #
       # @param options [Hash]

lib/rscons/builders/shared_library.rb

@@ -4,16 +4,6 @@ module Rscons
     # shared library.
     class SharedLibrary < Builder
 
-      Rscons.application.default_varset.append(
-        'SHLIBPREFIX' => (RUBY_PLATFORM =~ /mingw/ ? '' : 'lib'),
-        'SHLIBSUFFIX' => (RUBY_PLATFORM =~ /mingw/ ? '.dll' : '.so'),
-        'SHLDFLAGS' => ['${LDFLAGS}', '-shared'],
-        'SHLD' => nil,
-        'SHLIBDIRPREFIX' => '-L',
-        'SHLIBLINKPREFIX' => '-l',
-        'SHLDCMD' => ['${SHLD}', '-o', '${_TARGET}', '${SHLDFLAGS}', '${_SOURCES}', '${SHLIBDIRPREFIX}${LIBPATH}', '${SHLIBLINKPREFIX}${LIBS}']
-      )
-
       class << self
         # Return a set of build features that this builder provides.
         #

lib/rscons/builders/shared_object.rb

@@ -13,23 +13,6 @@ module Rscons
         "SHDC" => "DSUFFIX",
       }
 
-      pic_flags = (RUBY_PLATFORM =~ /mingw/ ? [] : ['-fPIC'])
-      Rscons.application.default_varset.append(
-        'SHCCFLAGS' => ['${CCFLAGS}'] + pic_flags,
-
-        'SHCC' => '${CC}',
-        'SHCFLAGS' => ['${CFLAGS}'],
-        'SHCCCMD' => ['${SHCC}', '-c', '-o', '${_TARGET}', '${CCDEPGEN}', '${INCPREFIX}${CPPPATH}', '${CPPFLAGS}', '${SHCFLAGS}', '${SHCCFLAGS}', '${_SOURCES}'],
-
-        'SHCXX' => '${CXX}',
-        'SHCXXFLAGS' => ['${CXXFLAGS}'],
-        'SHCXXCMD' => ['${SHCXX}', '-c', '-o', '${_TARGET}', '${CXXDEPGEN}', '${INCPREFIX}${CPPPATH}', '${CPPFLAGS}', '${SHCXXFLAGS}', '${SHCCFLAGS}', '${_SOURCES}'],
-
-        'SHDC' => 'gdc',
-        'SHDFLAGS' => ['${DFLAGS}'] + pic_flags,
-        'SHDCCMD' => ['${SHDC}', '-c', '-o', '${_TARGET}', '${INCPREFIX}${D_IMPORT_PATH}', '${SHDFLAGS}', '${_SOURCES}'],
-      )
-
       class << self
         # Return a set of build features that this builder provides.
         #