[MacRuby] #1468: Improve management of debug #defines

[MacRuby]

#1468: Improve management of debug #defines
--------------------------------+-------------------------------------------
 Reporter:  msabramo@…          |       Owner:  lsansonetti@…        
     Type:  defect              |      Status:  new                  
 Priority:  minor               |   Milestone:                       
Component:  MacRuby             |    Keywords:                       
--------------------------------+-------------------------------------------
 I want to be able to build MacRuby with debug information by tweaking the
 command-line instead of the code itself (which is what I had been doing
 until now). Something like:

 {{{
 [last: 41] marca at SCML-MarcA:~/dev/git-repos/MacRuby$
 CFLAGS="-DROXOR_VM_DEBUG" rake
 (in /Users/marca/dev/git-repos/MacRuby)
 /usr/bin/g++ -I. -I./include -fblocks -g -Wall -Wno-deprecated-
 declarations -Werror -arch x86_64 -DROXOR_VM_DEBUG -I/usr/local/include
 -D_DEBUG -D_GNU_SOURCE -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -O3
 -fno-rtti -fno-common -Woverloaded-virtual -I./icu-1060 -c vm.cpp -o
 .objs/vm.o
 vm.cpp:9:1: error: "ROXOR_VM_DEBUG" redefined
 <command-line>: error: this is the location of the previous definition
 rake aborted!
 Command failed with status (1): [/usr/bin/g++ -I. -I./include -fblocks -g
 -...]

 (See full trace by running task with --trace)
 }}}

 This fails because vm.cpp has:

 {{{
 #define ROXOR_VM_DEBUG 0
 }}}

 I could fix this by changing that to:

 {{{
 #ifndef ROXOR_VM_DEBUG
 #define ROXOR_VM_DEBUG 0
 #endif
 }}}

-- 
Ticket URL: <http://www.macruby.org/trac/ticket/1468>
MacRuby <http://macruby.org/>