build_vms.com: detect and use zlib shared image

Update the build_vms.com to detect and use zlib shared image installed
by the ZLIB kit produced by Jean-Francois Pieronne, and the also the
future ZLIB 1.2.8 kit in addition to the older ZLIB kits.

Also fix the indentation to match one of the common standards used for
VMS DCL command files and removed the hard tab characters.

Tested on OpenVMS 8.4 Alpha and IA64, and OpenVMS 7.3 VAX.

packages/vms/build_vms.com

@@ -22,7 +22,8 @@ $!		Note, you must match the pointer size that the OpenSSL
 $!              shared image expects.
 $!              Currently curl is not building properly with 64 bit pointers
 $!              on VMS because it is trying to cast pointers to 32 bit
-$!		integers.
+$!              integers and some OpenVMS library routines called by curl
+$!              do not yet support 64 bit pointers.
 $!    CCQUAL=x  Add "x" to the C compiler qualifiers.
 $!              Default qualifiers are:
 $!                  /standard=relaxed
@@ -35,7 +36,7 @@ $!    DEBUG     Compile debug and nooptimize
 $!              Alpha/IA64 always compiles /debug.
 $!              Always link a debug image.
 $!    NOIEEE    Do not use IEEE floating point.  (Alpha/I64)
-$!		VAX must use DFLOAT
+$!              VAX must always use DFLOAT
 $!    NOLARGE   Disable large-file support if large file support available.
 $!              (Non-VAX, VMS >= V7.2.)
 $!    NOLDAP    Disable LDAP support if LDAP is available.
@@ -52,6 +53,8 @@ $!    NOSSL     Don't use any SSL, even if available.
 $!    OSSLOLB   Use OpenSSL object libraries (.OLB), even if shared
 $!              images (.EXE) are available.
 $!    NOZLIB    Don't use GNV$ZLIB shared image even if available.
+$!    REALCLEAN Delete product files for all host architectures.  (No
+$!              build done.)  Alias for CLEAN_ALL
 $!
 $! DCL Symbols:
 $!
@@ -133,6 +136,18 @@ $!                   symbol tool_main needs to be quoted when parse style is
 $!                   set to exended in versions of VMS greater than 7.3-1.
 $!                   Remove curlbuild.h generation as it should be pre-built
 $!                   in the curl release or daily tarball.
+$! 12-Jul-2013, John Malmberg
+$!                   Adjust to find and use ZLIB from the Jean-Francois
+$!                   Pieronne shared image and newer GNV ZLIB kit that
+$!                   is upward compatible with Jean-Francois's kit.
+$!                   Remove tabs from file.
+$!                   Fixed DCL formatting as follows:
+$!                      * Labels have no space after leading $.
+$!                      * 1 space after $ for first level.
+$!                      * 3 spaces after $ for second level.  Line start + 4.
+$!                      * 7 spaces after $ for third level.  Line start + 8.
+$!                      * Each level after that indents 4 characters.
+$!                      * then/else/endif same indentation as if statement.
 $!
 $!===========================================================================
 $!
@@ -297,8 +312,25 @@ $!
 $ args_len = f$length(args)
 $ args_lower_len = f$length(args_lower)
 $!
+$ clean = 0
 $ if f$locate(",clean,", args_lower) .lt. args_lower_len
 $ then
+$   clean = 1
+$ endif
+$ clean_all = 0
+$ if f$locate(",clean_all,", args_lower) .lt. args_lower_len
+$ then
+$    clean = 1
+$    clean_all = 1
+$ endif
+$ if f$locate(",realclean,", args_lower) .lt. args_lower_len
+$ then
+$    clean = 1
+$    clean_all = 1
+$ endif
+$!
+$ if clean .ne. 0
+$ then
 $   prods = "''exedir'*.*;*"
 $   if (f$search(prods) .nes. "") then delete /log 'prods'
 $   prods = proc_dev_dir + arch_name + ".DIR;1"
@@ -306,12 +338,19 @@ $   if (f$search(prods) .nes. "") then set prot=o:rwed 'prods'
 $   if (f$search(prods) .nes. "") then delete /log 'prods'
 $   file = "[]config_vms.h"
 $   if f$search(file) .nes. "" then delete/log 'file';*
+$   file = "[]config.h"
+$   if f$search(file) .nes. "" then delete/log 'file';*
+$   file = "[.lib.cxx_repository]cxx$demangler_db."
+$   if f$search(file) .nes. "" then delete/log 'file';*
+$   file = "[.src.cxx_repository]cxx$demangler_db."
+$   if f$search(file) .nes. "" then delete/log 'file';*
 $   file = "[.lib]config_vms.h"
 $   if f$search(file) .nes. "" then delete/log 'file';*
-$       goto Common_Exit
+$   if clean_all .eq. 0 then goto Common_Exit
 $ endif
 $!
-$ if f$locate(",clean_all,", args_lower) .lt. args_lower_len
+$!
+$ if clean_all .ne. 0
 $ then
 $   prods = proc_dev_dir - delim + ".ALPHA" + delim + "*.*;*"
 $   if (f$search(prods) .nes. "") then delete /log 'prods'
@@ -537,6 +576,28 @@ $!
 $! LIBZ
 $ libzshr_line = ""
 $ try_shr = "gnv$libzshr"
+$ if build_64
+$ then
+$!  First look for 64 bit
+$   if f$search("''try_shr'64") .eqs. ""
+$   then
+$!      Second look for the J.F. Pieronne 64 bit shared image
+$       try_shr = "LIBZ_SHR64"
+$       if f$search(try_shr) .eqs. "" then nozlib = 1
+$   endif
+$ else
+$!  First look for 32 bit
+$   if f$search("''try_shr'32") .eqs. ""
+$   then
+$!      Second look for old 32 bit image
+$       if f$search(try_shr) .eqs. ""
+$       then
+$!          Third look for the J.F. Pieronne 32 bit shared image
+$           try_shr = "LIBZ_SHR32"
+$           if f$search(try_shr) .eqs. "" then nozlib = 1
+$       endif
+$   endif
+$ endif
 $ if f$search(try_shr) .eqs. ""
 $ then
 $   nozlib = 1
@@ -544,11 +605,16 @@ $ endif
 $ curl_sys_zlibinc = ""
 $ if nozlib .eq. 0
 $ then
-$   'vo_c' "%CURL-I-BLDGNVLIBZ, building with GNV LIBZ support"
 $   libzshr_line = "''try_shr'/share"
+$   if f$locate("LIBZ", try_shr) .eq. 0
+$   then
+$       'vo_c' "%CURL-I-BLDJFPLIBZ, building with JFP LIBZ support"
+$       curl_sys_zlibinc = "LIBZ:"
+$   else
+$       'vo_c' "%CURL-I-BLDGNVLIBZ, building with GNV LIBZ support"
 $       curl_sys_zlibinc = "GNV$ZLIB_INCLUDE:"
 $   endif
-$!
+$ endif
 $!
 $! Form CC qualifiers.
 $!