qt5base-lts/mkspecs/features/yacc.prf

#
# Yacc extra-compiler for handling files specified in the YACCSOURCES variable
#

isEmpty(YACC_DIR): YACC_DIR = .

defineReplace(yaccCommands) {
    input = $$relative_path($$absolute_path($$1, $$OUT_PWD), $$OUT_PWD/$$YACC_DIR)
    input_base = $$basename(1)
    input_base ~= s/\.[^.]*$//
    hpp_output = $$2
    cpp_output = $$hpp_output
    cpp_output ~= s/$$re_escape($$first(QMAKE_EXT_H))$/$$first(QMAKE_EXT_CPP)/

    isEmpty(QMAKE_YACCFLAGS_MANGLE) {
        QMAKE_YACCFLAGS_MANGLE = -p $${input_base} -b $${input_base}
        QMAKE_YACC_HEADER      = $${input_base}.tab.h
        QMAKE_YACC_SOURCE      = $${input_base}.tab.c
    } else {
        QMAKE_YACCFLAGS_MANGLE ~= s/\\$base/$${input_base}/g #backwards compat
        QMAKE_YACC_HEADER      ~= s/\\$base/$${input_base}/g
        QMAKE_YACC_SOURCE      ~= s/\\$base/$${input_base}/g
    }
    QMAKE_YACCDECLFLAGS = $$QMAKE_YACCFLAGS
    !yacc_no_name_mangle: QMAKE_YACCDECLFLAGS += $$QMAKE_YACCFLAGS_MANGLE

    !equals(YACC_DIR, .): yacc_call = cd $$YACC_DIR &&
    yacc_call += $$QMAKE_YACC $$QMAKE_YACCDECLFLAGS $${input}

    commands = \
        -$(DEL_FILE) $${hpp_output} $${cpp_output}$$escape_expand(\\n\\t) \
        $${yacc_call}$$escape_expand(\\n\\t) \
        $(MOVE) $$shell_path($${YACC_DIR}/$${QMAKE_YACC_HEADER}) $${hpp_output}$$escape_expand(\\n\\t) \
        $(MOVE) $$shell_path($${YACC_DIR}/$${QMAKE_YACC_SOURCE}) $${cpp_output}$$escape_expand(\\n\\t)

    silent: commands = @echo Yacc $$1 && $$commands
    return($$commands)
}

yacc_output_base = $${YACC_DIR}/$${QMAKE_CPP_MOD_MOC}${QMAKE_FILE_BASE}$${QMAKE_MOD_YACC}

{
    yacc_decl.name = Yacc header
    yacc_decl.input = YACCSOURCES
    yacc_decl.variable_out = GENERATED_FILES
    yacc_decl.commands = ${QMAKE_FUNC_yaccCommands}
    yacc_decl.output = $${yacc_output_base}$$first(QMAKE_EXT_H)
    QMAKE_EXTRA_COMPILERS += yacc_decl
}

{
    yacc_impl.name = source for ${QMAKE_FILE_IN}
    yacc_impl.input = YACCSOURCES
    yacc_impl.variable_out = GENERATED_SOURCES
    yacc_impl.dependency_type = TYPE_C
    yacc_impl.commands = $$escape_expand(\\n)        # We don't want any commands where, but if command is empty no rules are created
    yacc_impl.depends += $${yacc_output_base}$$first(QMAKE_EXT_H)    # Make sure we depend on the step above
    yacc_impl.output = $${yacc_output_base}$$first(QMAKE_EXT_CPP)    # Faked output from this step, output really created in step above
    QMAKE_EXTRA_COMPILERS += yacc_impl
}

unset(yacc_output_base)