🚀 go-pugleaf

Greetings,

PROBLEM STATEMENT:

    autoconf version 1.1 does not correctly define the keyword `const' to
    be the empty string in environments that do not support `const'.

REPEAT BY:

    The following was executed on a DECstaton 3100 running ULTRIX 4.2:

	% cat configure.in
	AC_INIT(configure.in)
	AC_CONFIG_HEADER(config.h)
	AC_CONST
	AC_OUTPUT(Makefile)
	% cat config.h.in
	#undef const
	#define const const
	% autoconf --version
	Autoconf version 1.1
	% CC=cc ./configure
	checking for working const
	creating config.status
	creating Makefile
	creating config.h
	% cat config.h
	/* config.h.  Generated automatically by configure.  */
	#undef const
	#define const const
	%

    In the specified environment, the last two lines in file `config.h'
    should have been

	# define const
	# define const

    That this is so can be seen from the relevant lines in file
    `config.status':

	% sed -n 15,16p config.status
	DEFS='#define const 
	'
	%

POSSIBLE FIX:

    Apply the following patch to file `acgeneral.m4':

	% diff -c acgeneral.m4.dist acgeneral.m4
	*** acgeneral.m4.dist   Sun Aug 23 19:15:02 1992
	--- acgeneral.m4        Thu Sep  3 09:00:51 1992
	***************
	*** 476,492 ****
	  BEGIN { filenum = 1 }
	  filenum == 1 && <<$>>1 == "#define" \
	  { defs[<<$>>2] = <<$>>3
	    for (i = 4; i <= NF; i++)
	      defs[<<$>>2] = defs[<<$>>2] " " <<$>>i
	  }
	  /END_OF_DEFS/ { filenum = 2; next }
	  filenum == 2 && <<$>>1 == "#define" && \
	! defs[<<$>>2] != "" {
	    <<$>>3 = defs[<<$>>2]
	    print; next
	  }
	  filenum == 2 && <<$>>1 == "#undef" && \
	! defs[<<$>>2] != "" {
	    <<$>>1 = "#define"
	    <<$>>2 = <<$>>2 " " defs[<<$>>2]
	    print; next
	--- 476,493 ----
	  BEGIN { filenum = 1 }
	  filenum == 1 && <<$>>1 == "#define" \
	  { defs[<<$>>2] = <<$>>3
	+   hasdef[<<$>>2] = 1
	    for (i = 4; i <= NF; i++)
	      defs[<<$>>2] = defs[<<$>>2] " " <<$>>i
	  }
	  /END_OF_DEFS/ { filenum = 2; next }
	  filenum == 2 && <<$>>1 == "#define" && \
	! hasdef[<<$>>2] == 1 {
	    <<$>>3 = defs[<<$>>2]
	    print; next
	  }
	  filenum == 2 && <<$>>1 == "#undef" && \
	! hasdef[<<$>>2] == 1 {
	    <<$>>1 = "#define"
	    <<$>>2 = <<$>>2 " " defs[<<$>>2]
	    print; next

Regards,
Steve Emmerson   <steve@unidata.ucar.edu>