Re: doxygen build (current git version) fails "suddenly" (bison problem)

On Fri, 22 Sep 2017, Jens Schleusener wrote:

> Hi,
>
> just a small remark: I tried to compile the current git version of doxygen 
> under Linux (openSUSE Leap 42.3) and got "suddenly" (before it works many 
> times without any problems) the following error:
>
> [ 23%] Building CXX object 
> vhdlparser/CMakeFiles/vhdlparser.dir/VhdlParserIF.cpp.o
> [ 24%] Linking CXX static library ../lib/libvhdlparser.a
> [ 24%] Built target vhdlparser
> [ 24%] [BISON][constexp] Building parser with bison 2.7
> /usr/bin/bison: invalid argument ‘deprecated’ for ‘--warnings’
> Valid arguments are:
>   - ‘none            - no warnings’
>   - ‘midrule-values  - unset or unused midrule values’
>   - ‘yacc            - incompatibilities with POSIX Yacc’
>   - ‘conflicts-sr    - S/R conflicts’
>   - ‘conflicts-rr    - R/R conflicts’
>   - ‘other           - all other warnings’
>   - ‘all             - all of the above’
>   - ‘error           - warnings are errors’
> src/CMakeFiles/_doxygen.dir/build.make:303: recipe for target 
> 'generated_src/ce_parse.cpp' failed
>
> I don't have clue about "cmake" but that problem may eventually be caused by 
> a recent change in src/CMakeLists.txt:
>
> 66c66
> <     COMMAND ${BISON_EXECUTABLE} -l -d -p ce_parsexpYY
> ${CMAKE_SOURCE_DIR}/src/constexp.y -o ce_parse.c
> ---
> >     COMMAND ${BISON_EXECUTABLE} -l -d -p ce_parsexpYY -Wno-deprecated
> ${CMAKE_SOURCE_DIR}/src/constexp.y -o ce_parse.c
> 122c122
> < BISON_TARGET(constexp      constexp.y
> ${GENERATED_SRC}/ce_parse.cpp       COMPILE_FLAGS "${YACC_FLAGS}")
> ---
> > BISON_TARGET(constexp      constexp.y
> ${GENERATED_SRC}/ce_parse.cpp       COMPILE_FLAGS "-Wno-deprecated
> ${YACC_FLAGS}")
>
> So just for testing I replaced that file with the old one (9718 bytes,
> Aug 21 11:59) and the build process runs well.
>
> Maybe the version of the used "bison" program (2.7) is too old
> (current version is 3.0.4).

Still an addition: Surprisingly I found in the man page of the used 
"bison" release 2.7 under "Warning categories include:" the categories 
'deprecated' ("obsolete constructs") and 'no-CATEGORY' ("turn off warnings 
in CATEGORY") mentioned.

But manually tests with a fetched test file

  bison -Wdeprecated    test.y
  bison -Wno-deprecated test.y

failed and issued also the mention error message.

So I downloaded and compiled bison 3.0.4 myself and the error vanishes. To 
ensure it's not a problem of my openSUSE distro I downloaded and compiled 
also bison 2.7 myself and I could reproduce the error. So it seems a 
problem with bison 2.7 (bison 2.7.1 also issues that error, bison 3.0 not).

Regards

Jens

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