autoconf 2.13 / gcc-2.95.2 "const" issue

[Paul Henshaw <paul dot henshaw at jrc dot it>]

Dear all,

	I have recently upgraded from egcs-1.1.2 to gcc-2.95.2 on
	a Pentium III running Red Hat 6.1, and an Alpha running
	OSF 4.0e.

	I have noticed that the configure script generated by
	autoconf 2.13 seems to think that gcc-2.95.2 does not
	support the "const" and "inline" keywords.

	When I run the configure script with CC/CXX set to 
	the egcs-1.1.2 C and C++ compilers, the resulting 
	config.h contains lines like this:

		/* #undef const */
		/* #undef inline */
		#define HAVE_ALLOCA_H 1

	The config.h generated by the same configure script run for
	gcc-2.95.2 differs only in these lines:

		#define const 
		#define inline
		/* #undef HAVE_ALLOCA_H */

	Needless to say, the C++ source does not compile, and gives
	a very large number of errors regarding multiple definition
	of functions defined in the standard C++ library.

	By using the config.h generated for egcs-1.1.2 I have been 
	able to compile using gcc-2.95.2.

	I use gcc/egcs and autoconf on a regular basis and would like
	to say "thanks" for your great work. 

	Should you need any further information, please do not
	hesitate to contact me.  

	Cheers,
				Paul

-- 
Paul Henshaw, Institute for Systems, Informatics and Safety 
TP270,  JRC Ispra,  21020 Ispra (VA),  Italy
Tel:    ++39 0332 785262        Fax: ++39 0332 789185
WWW:    http://gist.jrc.it:8080/paul.gx