Import the FSF release of bison-1.25 onto the vendor branch.

In case you're wondering, the gcc-2.7.2.1 import uses this to generate
code.  The size of the generated code is bigger than the entire bison
release, making this a saving.  The bison doc is pretty good apparently.

1 files changed, 83 insertions, 0 deletions

diff --git a/contrib/bison/build.com b/contrib/bison/build.com
new file mode 100644
index 0000000..869ceb1
--- /dev/null
+++ b/contrib/bison/build.com
@@ -0,0 +1,83 @@
+$! Set the def dir to proper place for use in batch. Works for interactive too.
+$flnm = f$enviroment("PROCEDURE")     ! get current procedure name
+$set default 'f$parse(flnm,,,"DEVICE")''f$parse(flnm,,,"DIRECTORY")'
+$!
+$! This command procedure compiles and links BISON for VMS.
+$! BISON has been tested with VAXC version 2.3 and VMS version 4.5
+$! and on VMS 4.5 with GCC 1.12.
+$!
+$! Bj|rn Larsen			blarsen@ifi.uio.no
+$! With some contributions by Gabor Karsai, 
+$!  KARSAIG1%VUENGVAX.BITNET@jade.berkeley.edu
+$! All merged and cleaned by RMS.
+$!
+$! Adapted for both VAX-11 "C" and VMS/GCC compilation by
+$! David L. Kashtan		kashtan.iu.ai.sri.com
+$!
+$! First we try to sense which C compiler we have available.  Sensing logic
+$! borrowed from Emacs.
+$!
+$set noon		!do not bomb if an error occurs.
+$assign nla0: sys$output
+$assign nla0: sys$error  !so we do not get an error message about this.
+$cc nla0:compiler_check.c
+$if $status.eq.%x38090 then goto try_gcc
+$ CC :== CC
+$ cc_options:="/NOLIST/define=(""index=strchr"",""rindex=strrchr"")"
+$ extra_linker_files:="VMSHLP,"
+$goto have_compiler
+$!
+$try_gcc:
+$gcc nla0:compiler_check.c
+$if $status.eq.%x38090 then goto whoops
+$ CC :== GCC
+$ cc_options:="/DEBUG"
+$ extra_linker_files:="GNU_CC:[000000]GCCLIB/LIB,"
+$goto have_compiler
+$!
+$whoops:
+$write sys$output "You must have a C compiler to build BISON.  Sorry."
+$deassign sys$output
+$deassign sys$error
+$exit %x38090
+$!
+$!
+$have_compiler:
+$deassign sys$output
+$deassign sys$error
+$set on
+$if f$search("compiler_check.obj").nes."" then dele/nolog compiler_check.obj;
+$write sys$output "Building BISON with the ''cc' compiler."
+$!
+$!	Do the compilation (compiler type is all set up)
+$!
+$ Compile:
+$ if "''p1'" .eqs. "LINK" then goto Link
+$ 'CC' 'cc_options' files.c
+$ 'CC' 'cc_options' LR0.C
+$ 'CC' 'cc_options' ALLOCATE.C
+$ 'CC' 'cc_options' CLOSURE.C
+$ 'CC' 'cc_options' CONFLICTS.C
+$ 'CC' 'cc_options' DERIVES.C
+$ 'CC' 'cc_options' VMSGETARGS.C
+$ 'CC' 'cc_options' GRAM.C
+$ 'CC' 'cc_options' LALR.C
+$ 'CC' 'cc_options' LEX.C
+$ 'CC' 'cc_options' MAIN.C
+$ 'CC' 'cc_options' NULLABLE.C
+$ 'CC' 'cc_options' OUTPUT.C
+$ 'CC' 'cc_options' PRINT.C
+$ 'CC' 'cc_options' READER.C
+$ 'CC' 'cc_options' REDUCE.C
+$ 'CC' 'cc_options' SYMTAB.C
+$ 'CC' 'cc_options' WARSHALL.C
+$ 'CC' 'cc_options' VERSION.C
+$ if "''CC'" .eqs. "CC" then macro vmshlp.mar
+$ Link:
+$ link/exec=bison main,LR0,allocate,closure,conflicts,derives,files,-
+vmsgetargs,gram,lalr,lex,nullable,output,print,reader,reduce,symtab,warshall,-
+version,'extra_linker_files'sys$library:vaxcrtl/lib
+$!
+$! Generate bison.hlp (for online help).
+$!
+$runoff bison.rnh