[lmi] Building lmi with pre-wx-2.9.5 snapshot

[Greg Chicares]

I'm trying to build lmi with today's wx snapshot:
  ftp://ftp.wxwidgets.org/pub/Daily_HEAD/files/wxWidgets-2013-07-11.tar.gz
It fails on several files, as follows [command line wrapped manually]:

/MinGW_/bin/g++  -MMD -MP -MT file_command_wx.o -MF file_command_wx.d
  -c -I /lmi/src/lmi -I /lmi/src/lmi/tools/pete-2.1.1
  -I /opt/lmi/local/lib/wx/include/i686-pc-mingw32-msw-unicode-2.9
  -I /opt/lmi/local/include/wx-2.9 -I /opt/lmi/third_party/include
  -I /opt/lmi/third_party/src -I /opt/lmi/local/include
  -I /opt/lmi/local/include/libxml2
  -DLMI_WX_NEW_USE_SO    -DLIBXML_USE_DLL  -DSTRICT       
-D_LARGEFILE_SOURCE=unknown
  -DWXUSINGDLL -D__WXMSW__  -DBOOST_STRICT_CONFIG
  -std=gnu++98 -posix  -pedantic-errors -Werror  -Wall  -Wcast-align  
-Wconversion
  -Wdeprecated-declarations  -Wdisabled-optimization  -Wimport  -Wmultichar  
-Wpacked
  -Wpointer-arith  -Wsign-compare  -Wundef  -Wwrite-strings   -Wno-long-long
  -Wctor-dtor-privacy  -Wdeprecated  -Wnon-template-friend  -Woverloaded-virtual
  -Wpmf-conversions  -Wsynth      -Wno-uninitialized
  --param ggc-min-expand=25 --param ggc-min-heapsize=32768
  -ggdb -O2     /lmi/src/lmi/file_command_wx.cpp -ofile_command_wx.o

In file included from /opt/lmi/local/include/wx-2.9/wx/version.h:17,
                 from /opt/lmi/local/include/wx-2.9/wx/defs.h:194,
                 from /opt/lmi/local/include/wx-2.9/wx/mimetype.h:20,
                 from /lmi/src/lmi/file_command_wx.cpp:37:
/opt/lmi/local/include/wx-2.9/wx/cpp.h:153:30: anonymous variadic macros were 
introduced in C99
/opt/lmi/local/include/wx-2.9/wx/cpp.h:155:66: anonymous variadic macros were 
introduced in C99
[...]
/opt/lmi/local/include/wx-2.9/wx/cpp.h:170:31: anonymous variadic macros were 
introduced in C99
/lmi/src/lmi/workhorse.make:762: recipe for target `file_command_wx.o' failed

(1) Should I...
(1)(a) use some flag other than '-std=gnu++98' to compile lmi
  source files that include wx headers? Oops--I'm still using
  gcc-3.4.5, which supports no later standard, so '-std=c++0x'
  and '-std=c++11' are unavailable:
    
http://gcc.gnu.org/onlinedocs/gcc-3.4.6/gcc/C-Dialect-Options.html#C-Dialect-Options
(1)(b) attempt to disable this somehow in 'configure'? I'm
  using '--disable-vararg_macros' already, but presumably
  that's not the same thing; and my reading of 'wx/cpp.h'
  suggests that any attempted use of wxCALL_FOR_EACH would
  just produce an error if I were somehow able to turn off
  wxHAS_VARIADIC_MACROS anyway.
(1)(c) use '-Wno-variadic-macros' to suppress the warning
  (which is treated as an error because of '-Werror'), and
  hope^H^H^H^Htest that the compiled code just works?

(2) Unrelated question: when building wx itself, using
  ../configure [...options...] && make && make install
can I add my own CXXFLAGS in configure's options-list?
In particular, I want to build wx with
  --param ggc-min-expand=25 --param ggc-min-heapsize=32768
so that I can use sixteen cores on a 32-bit OS.