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Contents
module Rscons
module Builders
# Build a C or C++ source file given a lex (.l, .ll) or yacc (.y, .yy)
# input file.
#
# Examples::
# env.CFile("parser.tab.cc", "parser.yy")
# env.CFile("lex.yy.cc", "parser.ll")
class CFile < Builder
# Return default construction variables for the builder.
#
# @param env [Environment] The Environment using the builder.
#
# @return [Hash] Default construction variables for the builder.
def default_variables(env)
{
"YACC" => "bison",
"YACC_FLAGS" => ["-d"],
"YACC_CMD" => ["${YACC}", "${YACC_FLAGS}", "-o", "${_TARGET}", "${_SOURCES}"],
"LEX" => "flex",
"LEX_FLAGS" => [],
"LEX_CMD" => ["${LEX}", "${LEX_FLAGS}", "-o", "${_TARGET}", "${_SOURCES}"],
}
end
# Run the builder to produce a build target.
#
# @param target [String] Target file name.
# @param sources [Array<String>] Source file name(s).
# @param cache [Cache] The Cache object.
# @param env [Environment] The Environment executing the builder.
# @param vars [Hash,VarSet] Extra construction variables.
#
# @return [String,false]
# Name of the target file on success or false on failure.
def run(target, sources, cache, env, vars)
vars = vars.merge({
"_TARGET" => target,
"_SOURCES" => sources,
})
cmd =
case
when sources.first.end_with?(".l", ".ll")
"LEX"
when sources.first.end_with?(".y", ".yy")
"YACC"
else
raise "Unknown source file #{sources.first.inspect} for CFile builder"
end
command = env.build_command("${#{cmd}_CMD}", vars)
standard_build("#{cmd} #{target}", target, command, sources, env, cache)
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems