qt5base-lts/mkspecs/features/lex.prf

#
# Lex extra-compiler for handling files specified in the LEXSOURCES variable
#

{
    lex.name = Lex ${QMAKE_FILE_IN}
    lex.input = LEXSOURCES
    lex_included {
        lex.CONFIG += no_link
    } else {
        lex.variable_out = GENERATED_SOURCES
    }

    isEmpty(QMAKE_LEXFLAGS_MANGLE):QMAKE_LEXFLAGS_MANGLE = -P${QMAKE_FILE_BASE}
    QMAKE_LEXEXTRAFLAGS = $$QMAKE_LEXFLAGS
    !yacc_no_name_mangle:QMAKE_LEXEXTRAFLAGS += $$QMAKE_LEXFLAGS_MANGLE

    contains(QMAKE_LEX, .*flex) {
        # GNU flex, we can use -o outfile
        lex.commands = $$QMAKE_LEX $$QMAKE_LEXEXTRAFLAGS --nounistd -o ${QMAKE_FILE_OUT} ${QMAKE_FILE_IN}
    } else {
        # stupid POSIX lex, it only generates a file called lex.yy.c
        # or lex.prefix.c if the -P<prefix> option is active
        intermediate_file = lex.yy.c
        QMAKE_LEXEXTRAFLAGS = $$QMAKE_LEXFLAGS $$QMAKE_LEXFLAGS_MANGLE

        lex.commands = \
                   -$(DEL_FILE) ${QMAKE_FILE_OUT}$$escape_expand(\\n\\t) \
                   $$QMAKE_LEX $$QMAKE_LEXEXTRAFLAGS ${QMAKE_FILE_IN}$$escape_expand(\\n\\t) \
                   $(MOVE) $$intermediate_file ${QMAKE_FILE_OUT} $$escape_expand(\\n\\t)
        unset(intermediate_file)
    }
    lex.output = $${QMAKE_CPP_MOD_MOC}${QMAKE_FILE_BASE}$${QMAKE_MOD_LEX}$${first(QMAKE_EXT_CPP)}

    silent:lex.commands = @echo Lex ${QMAKE_FILE_IN} && $$lex.commands
    QMAKE_EXTRA_COMPILERS += lex
}