Flex, Bison and qmake

[Hydragyrum]

I had a feeling it'll be something like that...

I've tried poking around a bit with it, but couldn't get it to work, It would appear in the makefile, but not under the "all" target...

I'll try it some more tomorrow, as I am not currently at work now If there's any other documentation on that feature it would be great to know.

Thanks.

[wysota]

Try something like this (not tested):

FLEXINPUTS = parser.l
flex_c.output = lex.yy.c
flex_c.input = FLEXINPUTS # it has to be done using a variable
flex_c.commands = flex parser.l

FLEXINPUTS = parser.l
flex_c.output = lex.yy.c
flex_c.input = FLEXINPUTS # it has to be done using a variable
flex_c.commands = flex parser.l

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[Hydragyrum]

for some reason, that wasn't working too well yesterday when I tried poking at it, but works now...

For the interested, my full qmake project file, at least for this testing app is as follows

######################################################################
# Automatically generated by qmake (2.00a) Thu Sep 7 15:54:07 2006
######################################################################
 
TEMPLATE = app
TARGET +=
DEPENDPATH += .
INCLUDEPATH += .
 
# Input
HEADERS += parse.h parser.y.h parseTest.h
#LEXSOURCES += parser.l
#YACCSOURCES += parser.y
SOURCES += main.cpp parseTest.cpp
 
# Flex/bison specifics
 
#QMAKE_LEX = flex
#QMAKE_YACC = bison
 
#QMAKE_YACCFLAGS = -d -o y.tab.c
#QMAKE_YACC_HEADER =
#QMAKE_YACC_SOURCE =
 
FLEXSOURCES = parser.l
BISONSOURCES = parser.y
 
flex.commands = flex ${QMAKE_FILE_IN}
flex.input = FLEXSOURCES
flex.output = lex.yy.c
flex.variable_out = SOURCES
flex.depends = y.tab.h
flex.name = flex
QMAKE_EXTRA_COMPILERS += flex
 
bison.commands = bison -d -t -y ${QMAKE_FILE_IN} && mv y.tab.c y.tab.cpp
bison.input = BISONSOURCES
bison.output = y.tab.cpp
bison.variable_out = SOURCES
bison.name = bison
QMAKE_EXTRA_COMPILERS += bison
 
bisonheader.commands = @true
bisonheader.input = BISONSOURCES
bisonheader.output = y.tab.h
bisonheader.variable_out = HEADERS
bisonheader.name = bison header
bisonheader.depends = y.tab.cpp
QMAKE_EXTRA_COMPILERS += bisonheader

######################################################################
# Automatically generated by qmake (2.00a) Thu Sep 7 15:54:07 2006
######################################################################
 
TEMPLATE = app
TARGET +=
DEPENDPATH += .
INCLUDEPATH += .
 
# Input
HEADERS += parse.h parser.y.h parseTest.h
#LEXSOURCES += parser.l
#YACCSOURCES += parser.y
SOURCES += main.cpp parseTest.cpp
 
# Flex/bison specifics
 
#QMAKE_LEX = flex
#QMAKE_YACC = bison
 
#QMAKE_YACCFLAGS = -d -o y.tab.c
#QMAKE_YACC_HEADER =
#QMAKE_YACC_SOURCE =
 
FLEXSOURCES = parser.l
BISONSOURCES = parser.y
 
flex.commands = flex ${QMAKE_FILE_IN}
flex.input = FLEXSOURCES
flex.output = lex.yy.c
flex.variable_out = SOURCES
flex.depends = y.tab.h
flex.name = flex
QMAKE_EXTRA_COMPILERS += flex
 
bison.commands = bison -d -t -y ${QMAKE_FILE_IN} && mv y.tab.c y.tab.cpp
bison.input = BISONSOURCES
bison.output = y.tab.cpp
bison.variable_out = SOURCES
bison.name = bison
QMAKE_EXTRA_COMPILERS += bison
 
bisonheader.commands = @true
bisonheader.input = BISONSOURCES
bisonheader.output = y.tab.h
bisonheader.variable_out = HEADERS
bisonheader.name = bison header
bisonheader.depends = y.tab.cpp
QMAKE_EXTRA_COMPILERS += bisonheader

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I'll have to add windows and linux-specific definitions for the move command in the bison.commands, but apart from that it works fairly nicely.

Still I'm not sure why it wasn't working yesterday..but's that's not important.

[kerloi]

Hi all,
I know it is a very old thread but I used it to implement my bison/flex parser with Qt, at least I tried.

I wrote a .pro file:

# Flex/bison specifics
FLEXSOURCES = VHDLParser.l
BISONSOURCES = VHDLParser.y
 
#flex definition
flex.name = Flex
flex.input = FLEXSOURCES
flex.output = ${QMAKE_FILE_BASE}.cpp
flex.commands = flex -i -o${QMAKE_FILE_OUT} ${QMAKE_FILE_IN}
#flex.CONFIG += target_predeps
flex.variable_out = SOURCES
QMAKE_EXTRA_COMPILERS += flex
 
#bison definition
bison.name = Bison
bison.input = BISONSOURCES
bison.output = ${QMAKE_FILE_BASE}.cpp
bison.commands = bison -d -o ${QMAKE_FILE_OUT} ${QMAKE_FILE_IN}
bison.clean = position.hh stack.hh location.hh VHDLParser.hpp
bison.CONFIG += target_predeps
bison.variable_out = SOURCES
QMAKE_EXTRA_COMPILERS += bison
 
OTHER_FILES += \
    $$BISONSOURCES \
    $$FLEXSOURCES

# Flex/bison specifics
FLEXSOURCES = VHDLParser.l
BISONSOURCES = VHDLParser.y

#flex definition
flex.name = Flex
flex.input = FLEXSOURCES
flex.output = ${QMAKE_FILE_BASE}.cpp
flex.commands = flex -i -o${QMAKE_FILE_OUT} ${QMAKE_FILE_IN}
#flex.CONFIG += target_predeps
flex.variable_out = SOURCES
QMAKE_EXTRA_COMPILERS += flex

#bison definition
bison.name = Bison
bison.input = BISONSOURCES
bison.output = ${QMAKE_FILE_BASE}.cpp
bison.commands = bison -d -o ${QMAKE_FILE_OUT} ${QMAKE_FILE_IN}
bison.clean = position.hh stack.hh location.hh VHDLParser.hpp
bison.CONFIG += target_predeps
bison.variable_out = SOURCES
QMAKE_EXTRA_COMPILERS += bison

OTHER_FILES += \
    $$BISONSOURCES \
    $$FLEXSOURCES

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But when I build my project, the flex compiler simply doesn't start. I can clearly see bison running in the console but not flex.
Of course, when comes the time to link every object files, it doesn't work beceause yylex() is missing ...

Please tell me what's wrong with this .pro.