PATCH: Use "make -p" to get targets

["Bart Schaefer" <schaefer@candle.brasslantern.com>]

I wrote:
> We'll just have to set up a style, as in _diff.

Strictly speaking, the _is_gnu branch would work for Solaris make as well
(as long as nobody actually created a target named .PHONY that had any
real rules).  I suppose you can fake it with the version style:

    zstyle ':completion:*:make:version' echo GNU

Somebody please "make" a better suggestion.

Index: Doc/Zsh/compsys.yo
===================================================================
@@ -715,6 +715,11 @@
 when completing a value out of a set of values (or a list of such
 values)
 )
+kindex(version, completion tag)
+item(tt(version))(
+used by tt(_call) to look up the command to run to determine the installed
+version of various other commands (currently tt(diff) and tt(make)).
+)
 kindex(warnings, completion tag)
 item(tt(warnings))(
 used to look up the tt(format) style for warnings
Index: Completion/User/_make
===================================================================
@@ -1,7 +1,18 @@
-#compdef make gmake pmake
+#compdef make gmake pmake dmake
 
 local prev="$words[CURRENT-1]" file expl tmp
 
+(( $+_is_gnu )) || typeset -gA _is_gnu
+
+if (( ! $+_is_gnu[$1] )); then
+  if [[ $(_call version $1 -v -f /dev/null </dev/null 2>/dev/null) = *GNU* ]]
+  then
+    _is_gnu[$1]=yes
+  else
+    _is_gnu[$1]=
+  fi
+fi
+
 if [[ "$prev" = -[CI] ]]; then
   _files -/
 elif [[ "$prev" = -[foW] ]]; then
@@ -14,17 +25,23 @@
     file=Makefile
   elif [[ -e makefile ]]; then
     file=makefile
+  elif [[ -e GNUmakefile ]]; then
+    file=GNUmakefile
   else
     file=''
   fi
 
   if [[ -n "$file" ]] && _wanted targets; then
-    tmp=(
-          $(awk '/^[a-zA-Z0-9][^\/\t]+:/ {print $1}
+    if [[ -n "$_is_gnu[$1]" ]]; then
+      tmp=( $(make -nsp --no-print-directory -f "$file" .PHONY | awk '/^[a-zA-Z0-9][^\/\t=]+:/ {print $1}' FS=:) )
+    else
+      tmp=(
+            $(awk '/^[a-zA-Z0-9][^\/\t=]+:/ {print $1}
  	      /^\.include  *<bsd\.port\.(subdir\.|pre\.)?mk>/ || /^\.include  *".*mk\/bsd\.pkg\.(subdir\.)?mk"/ {
  	        print "fetch fetch-list extract patch configure build install reinstall deinstall package describe checkpatch checksum makesum" }' \
  	     FS=: $file)
-         )
+           )
+    fi
     _all_labels targets expl 'make target' compadd "$tmp[@]" && return 0
   fi
   compset -P 1 '*='

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com