Enable hints to create call-back units that can act when

a specific variable is *not* set (like -Uuselargefiles)

p4raw-id: //depot/perl@21712

diff --git a/Configure b/Configure
index 89a315f..6f0a0be 100755 (executable)
--- a/Configure
+++ b/Configure
@@ -20,7 +20,7 @@
 
 # $Id: Head.U,v 3.0.1.9 1997/02/28 15:02:09 ram Exp $
 #
-# Generated on Thu Sep 18 09:10:02 EEST 2003 [metaconfig 3.0 PL70]
+# Generated on Thu Nov 13 11:29:28 MET 2003 [metaconfig 3.0 PL70]
 # (with additional metaconfig patches by perlbug@perl.org)
 
 cat >c1$$ <<EOF
@@ -1209,6 +1209,17 @@ elif test -d c:/. -o -n "$is_os2" ; then
 fi
 
 i_whoami=''
+ccname=''
+ccversion=''
+perllibs=''
+: set useposix=false in your hint file to disable the POSIX extension.
+useposix=true
+: set useopcode=false in your hint file to disable the Opcode extension.
+useopcode=true
+: Trailing extension.  Override this in a hint file, if needed.
+: Extra object files, if any, needed on this platform.
+archobjs=''
+archname=''
 : Possible local include directories to search.
 : Set locincpth to "" in a hint file to defeat local include searches.
 locincpth="/usr/local/include /opt/local/include /usr/gnu/include"
@@ -1217,12 +1228,6 @@ locincpth="$locincpth /opt/gnu/include /usr/GNU/include /opt/GNU/include"
 : no include file wanted by default
 inclwanted=''
 
-siteman1dir=''
-siteman3dir=''
-sitescript=''
-: Trailing extension.  Override this in a hint file, if needed.
-: Extra object files, if any, needed on this platform.
-archobjs=''
 groupstype=''
 libnames=''
 : change the next line if compiling for Xenix/286 on Xenix/386
@@ -1246,25 +1251,20 @@ plibpth=''
 libswanted=''
 : some systems want to use only the non-versioned libso:s
 ignore_versioned_solibs=''
-: full support for void wanted by default
-defvoidused=15
-
-ccname=''
-ccversion=''
-perllibs=''
-: set useposix=false in your hint file to disable the POSIX extension.
-useposix=true
-: set useopcode=false in your hint file to disable the Opcode extension.
-useopcode=true
+siteman1dir=''
+siteman3dir=''
+sitescript=''
 archname64=''
 ccflags_uselargefiles=''
 ldflags_uselargefiles=''
 libswanted_uselargefiles=''
 : set usemultiplicity on the Configure command line to enable multiplicity.
 : set usesocks on the Configure command line to enable socks.
-archname=''
 : set usethreads on the Configure command line to enable threads.
 usereentrant='undef'
+: full support for void wanted by default
+defvoidused=15
+
 : List of libraries we want.
 : If anyone needs extra -lxxx, put those in a hint file.
 libswanted="sfio socket bind inet nsl nm ndbm gdbm dbm db malloc dl dld ld sun"
@@ -3673,22 +3673,22 @@ set d_oldpthreads
 eval $setvar
 
 
-case "$usethreads" in
-"$define"|true|[yY]*)
 : Look for a hint-file generated 'call-back-unit'.  If the
 : user has specified that a threading perl is to be built,
 : we may need to set or change some other defaults.
-       if $test -f usethreads.cbu; then
-               echo "Your platform has some specific hints for threaded builds, using them..."
-               . ./usethreads.cbu
-       else
+if $test -f usethreads.cbu; then
+    echo "Your platform has some specific hints regarding threaded builds, using them..."
+    . ./usethreads.cbu
+else
+    case "$usethreads" in
+       "$define"|true|[yY]*)
                $cat <<EOM
-(Your platform doesn't have any specific hints for threaded builds.
+(Your platform does not have any specific hints for threaded builds.
  Assuming POSIX threads, then.)
 EOM
-       fi
        ;;
-esac
+    esac
+fi
 
 cat <<EOM
 
@@ -4546,21 +4546,21 @@ case "$uselongdouble" in
 true|[yY]*) uselongdouble="$define" ;;
 esac
 
-case "$uselongdouble" in
-$define)
 : Look for a hint-file generated 'call-back-unit'.  If the
 : user has specified that long doubles should be used,
 : we may need to set or change some other defaults.
-       if $test -f uselongdouble.cbu; then
-               echo "Your platform has some specific hints for long doubles, using them..."
-               . ./uselongdouble.cbu
-       else
+if $test -f uselongdouble.cbu; then
+    echo "Your platform has some specific hints regarding long doubles, using them..."
+    . ./uselongdouble.cbu
+else
+    case "$uselongdouble" in
+       $define)
                $cat <<EOM
-(Your platform doesn't have any specific hints for long doubles.)
+(Your platform does not have any specific hints for long doubles.)
 EOM
-       fi
        ;;
-esac
+    esac
+fi
 
 : Looking for optional libraries
 echo " "
@@ -5447,15 +5447,15 @@ EOM
        ;;
 esac
 
-case "$use64bitint" in
-"$define"|true|[yY]*)
 : Look for a hint-file generated 'call-back-unit'.  If the
 : user has specified that a 64-bit perl is to be built,
 : we may need to set or change some other defaults.
        if $test -f use64bitint.cbu; then
-               echo "Your platform has some specific hints for 64-bit integers, using them..."
+       echo "Your platform has some specific hints regarding 64-bit integers, using them..."
                . ./use64bitint.cbu
        fi
+case "$use64bitint" in
+"$define"|true|[yY]*)
        case "$longsize" in
        4) case "$archname64" in
           '') archname64=64int ;;
@@ -5465,15 +5465,15 @@ case "$use64bitint" in
        ;;
 esac
 
-case "$use64bitall" in
-"$define"|true|[yY]*)
 : Look for a hint-file generated 'call-back-unit'.  If the
 : user has specified that a maximally 64-bit perl is to be built,
 : we may need to set or change some other defaults.
        if $test -f use64bitall.cbu; then
-               echo "Your platform has some specific hints for 64-bit builds, using them..."
+       echo "Your platform has some specific hints regarding 64-bit builds, using them..."
                . ./use64bitall.cbu
        fi
+case "$use64bitall" in
+"$define"|true|[yY]*)
        case "$longsize" in
        4) case "$archname64" in
           ''|64int) archname64=64all ;;
@@ -8852,14 +8852,16 @@ EOM
 esac
 set uselargefiles
 eval $setvar
-case "$uselargefiles" in
-"$define")
 : Look for a hint-file generated 'call-back-unit'.  If the
 : user has specified that a large files perl is to be built,
 : we may need to set or change some other defaults.
+if $test -f uselargefiles.cbu; then
+       echo "Your platform has some specific hints regarding large file builds, using them..."
+       . ./uselargefiles.cbu
+fi
+case "$uselargefiles" in
+"$define")
        if $test -f uselargefiles.cbu; then
-               echo "Your platform has some specific hints for large file builds, using them..."
-               . ./uselargefiles.cbu
                echo " "
                echo "Rechecking to see how big your file offsets are..." >&4
                $cat >try.c <<EOCP

diff --git a/hints/README.hints b/hints/README.hints
index 9b49a39..f55ded9 100644 (file)
--- a/hints/README.hints
+++ b/hints/README.hints
@@ -303,6 +303,13 @@ variable in question is defined; however, this may change, so the scheme in
 hints/solaris_2.sh of checking to see if uselongdouble is defined is a good
 idea.
 
+=item Call status
+
+Call-backs are only called always, even if the value for the call-back is
+uset: UU/usethreads.cbu is called when Configure is about to deal with
+threads. All created call-backs from hints should thus check the status
+of the variable, and act upon it.
+
 =item Future status
 
 I hope this "call-back" scheme is simple enough to use but powerful