Re: [xml] -fexceptions

[Daniel Veillard <veillard redhat com>]

On Thu, Apr 03, 2003 at 07:21:29PM +0100, Graham Bennett wrote:
> Hi,
>
> Is there an easy way to enable the -fexceptions flag for gcc when
> building libxml?  If not, I think it would be worth adding to the
> configure script (e.g. --with-exceptions).  It would be very useful to
> be able to throw from SAX callbacks when using libxml from C++.

  Okay, I did look at this. I did some checks:

Compiled with -O2
gnome:~/XML -> ls -l .libs/libxml2.a .libs/libxml2.so.2.5.7
-rw-rw-r--    1 veillard www       1136512 Jul 27 09:02 .libs/libxml2.a
-rwxrwxr-x    1 veillard www       1056727 Jul 27 09:02 .libs/libxml2.so.2.5.7*
gnome:~/XML -> ./xmllint --timing --stream db100000.xml
Parsing took 14399 ms
gnome:~/XML ->

Compiled with -O2 -fexceptions
gnome:~/XML -> ls -l .libs/libxml2.a .libs/libxml2.so.2.5.7
-rw-rw-r--    1 veillard www       1216584 Jul 27 09:15 .libs/libxml2.a
-rwxrwxr-x    1 veillard www       1171039 Jul 27 09:15 .libs/libxml2.so.2.5.7*
gnome:~/XML -> ./xmllint --timing --stream db100000.xml
Parsing took 14334 ms
gnome:~/XML ->

  I'm afraid that taking a 10+% hit on code size is a bit hard to justify
so I simply added this as an option to configure:

gnome:~/XML -> ./configure --help | grep exception
  --with-fexceptions      add GCC flag -fexceptions for C++ exceptions (off)
gnome:~/XML ->

  which is kept off by default. I hope it's sufficient. It's in CVS now,

Daniel

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