alloca.h does not exist in FreeBSD.

[Jason Kerr]

Problem: regex_internal.h includes alloca.h which does not exist in FreeBSD.

Version: nagios-plugins-1.4.5
OS: FreeBSD 5.5-STABLE

Snipped output from config.log:
configure:35748: checking for working alloca.h
configure:35769: gcc -o conftest -g -O2   -L. conftest.c  >&5
conftest.c:127:20: alloca.h: No such file or directory
configure:35775: $? = 1
configure: failed program was:
| /* confdefs.h.  */
|


Snipped output from make:
In file included from regex.c:55:
regex_internal.h:458:20: alloca.h: No such file or directory
*** Error code 1

Stop in /usr/home/xxx/nagios-plugins-1.4.5/lib.
*** Error code 1

Stop in /usr/home/xxx/nagios-plugins-1.4.5/lib.
*** Error code 1

Stop in /usr/home/xxx/nagios-plugins-1.4.5/lib.
*** Error code 1

Stop in /usr/home/xxx/nagios-plugins-1.4.5.
*** Error code 1

Stop in /usr/home/xxx/nagios-plugins-1.4.5.


In FreeBSD the alloca function is contained in stdlib.h, but the 
manpage discourages its use.  "BUGS  The alloca() function is machine 
and compiler dependent; its use is dis-couraged."


In regex_internal.h do we need something like:
#ifdef HAVE_ALLOCA_H
    #include <alloca.h>
#else
   /* do nothing??? */
#endif

Thanks,
Jason



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