I am now running into a situation where my development system is using
the latest release of BRL-CAD (7.16.4) and my remote team mate is
using an older one (7.12.6) and some function signatures have changed.
Specifically,
void rt_db_free_internal(struct rt_db_internal *ip, struct resource *resp);
became
void rt_db_free_internal(struct rt_db_internal *ip);
and g++ 4.4.3 doesn't like that. I have found no clean way to use a
compile-time cpp macro to distinguish the two versions but would
appreciate any ideas. I know my team mate needs to upgrade, but that
isn't in the cards at the moment.
Note there is a PACKAGE_VERSION defined as a string but I don't think
you can use that at compile time (at least I haven't found a solution
looking at the cpp manual).
I think we need something like gcc and others use:
#define BRLCAD_MAJOR_VERSION 7
#define BRLCAD_MINOR_VERSION 16
#define BRLCAD_PATCH_VERSION 4
>From the cpp manual (4.4.3), gcc defines three macros
__GNUC__ // major version
__GNUC_MINOR__
__GNUC_PATCHLEVEL__
and they show a couple of ways to test for a specific version. I like
this method:
#define GCC_VERSION (__GNUC__ * 10000 \
+ __GNUC_MINOR__ * 100 \
+ __GNUC_PATCHLEVEL__)
/* Test for GCC > 3.2.0 */
#if GCC_VERSION > 30200
or BRl-CAD could just take the easier, direct route:
#define BRLCAD_VERSION 71604 // allows up to 100 minor
versions and 100 patch levels for each major version
For the moment I will use a kludge macro until I hear the magic solution.
Thanks.
-Tom
Thomas M. Browder, Jr.
Niceville, Florida
USA
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