CDE has relied upon catgets() implementations following a relaxed
interpretation of the XPG internationalization standard that ignored
-1, the standard error value returned by catopen, as the catalog
argument. However, this same behavior causes segmentation faults with
the musl C library.
This patch:
- Centralizes (with the exception of ToolTalk) all calls to catopen(),
catgets(), and catclose() through MsgCat within the DtSvc library.
- Prevents calls to catgets() and catclose() that rely upon
undefined behavior.
- Eliminates a number of bespoke catgets() wrappers, including multiple
redundant caching implementations designed to work around a design
peculiarity in HP/UX.
- Eases building CDE without XPG internationalization support by providing
the appropriate macros.
Removed all the cases of sys_errlist[], no one should be using that
today. Also, correct code generation so that declarations like
'Widget w = NULL; Pixmap p = NULL;' etc, aren't produced, which is
wrong. Use '0', not NULL for these.
This should also correct the 2 mis-definitions of Pixmap that commit
6a9327f2ab attempted to fix in ttsnoop.
dtappbuilder still needs a lot of work.
Add preprocessor directives not to try
to redefine sys_errlist[] or sys_nerr
There are already definitions:
extern __const char *__const sys_errlist[];
extern __const int sys_nerr;
in <stdio.h>
Actually we should have something like
NeedSysErrlist in imake definitions
to get rid of those #ifdefs.
