[Rd] Trying to make DEBUG=T a debug version of R
murdoch.duncan at gmail.com
Thu Apr 11 14:01:36 CEST 2013
On 13-04-10 8:02 PM, Andre Mikulec wrote:
> I am trying to make a debug version of R ( for use with gdb later ) on windows.
> I am executing the following.
> src\gnuwin32>make clean
> src\gnuwin32>make DEBUG=T
> In the output, I see many
> -O3 flags
> I do not see any
> -g -O0 flags
> which ( I believe/I think ) that is what I need to debug R in gdb.
> What is the proper way to 'make' a 'Debug version of R'?
You don't need -O0 to debug in gdb, you just need the -g flag set
properly, which DEBUG=T will do for you. That's how I generally do it.
Setting -O0 might make debugging easier (because it eliminates
optimizations). To do that, you'll need to change the CFLAGS setting in
src/gnuwin32/Makefiles. (You may also be able to do it with a CFLAGS
environment variable, I haven't tried.) I don't usually do this, since
it changes the code: if you need gdb, chances are the bug is subtle,
and its behaviour may change with optimization level. But you may have
a different preference.
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