Re: ltdl.c ifdefs

[Alexandre Oliva]

On Apr  6, 2004, Bob Friesenhahn <address@hidden> wrote:

> #if WITH_DMALLOC

> This form is clearly incorrect unless WITH_DMALLOC is always defined
> (e.g. as 1 or 0).

Nope.  An undefined macro is equivalent to a macro defined to 0 in
preprocessor tests.  It's actually better to test with #if than #ifdef
because then someone can compile with -DWITH_MALLOC=0 and have the
feature disabled even if there's code that enables it by default, such
as:

#ifndef WITH_DMALLOC
# define WTIH_DMALLOC 1
#endif

-- 
Alexandre Oliva             http://www.ic.unicamp.br/~oliva/
Red Hat Compiler Engineer   address@hidden, gcc.gnu.org}
Free Software Evangelist  address@hidden, gnu.org}