Re: ifdef ... endif issue

[Benoit SIGOURE]

On Aug 26, 2007, at 12:04 AM, Daniel Leidert wrote:

> Hi,

Hi,

> I wanted to use this code in one of my Makefiles:
>
> ifdef WIN32_EXTRA_LDFLAGS
> WIN32_EXTRA_LDFLAGS += -export-symbols $(srcdir)/entities.def
> endif
>
> But that doesn't work. automake complains:
>
> src/plugin_entities/Makefile.am:22: WIN32_EXTRA_LDFLAGS must be set  
> with
> `=' before using `+='
> src/plugin_entities/Makefile.am:23: endif without if
>
> 1. Shouldn't automake stop complaining about setting  
> WIN32_EXTRA_LDFLAGS
> first, when I test for its existence?
>
> 2. Why is automake complaining about the endif "without" if? The
> ifdef...endif condition is part of make and I know several Makefiles,
> that use it. Is it a bug in automake?

I don't think you can do what you're trying to achieve.  AFAIK the  
if .. endif syntax used by automake is for conditionals only (see:  
http://www.gnu.org/software/automake/manual/html_node/ 
Conditionals.html) and there is nothing such as "ifdef".

Cheers,

--
Benoit Sigoure aka Tsuna
EPITA Research and Development Laboratory

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