completion for gcc and back-ends (g++, c++, g77, and gcj) from

Phil Edwards <phil@jaj.com>

bash_completion

@@ -1,6 +1,6 @@
 #   bash_completion - some programmable completion functions for bash 2.05a
 #
-#   $Id: bash_completion,v 1.118 2002/02/15 07:18:22 ianmacd Exp $
+#   $Id: bash_completion,v 1.119 2002/02/15 23:53:58 ianmacd Exp $
 #
 #   Copyright (C) Ian Macdonald <ian@caliban.org>
 #
@@ -1719,6 +1719,62 @@ _psql ()
 }
 [ "$have" ] && complete -F _psql psql
 
+# gcc(1) completion by Phil Edwards <phil@jaj.com>
+#
+# The only unusual feature is that we don't parse "gcc --help -v" output
+# directly, because that would include the options of all the other backend
+# tools (linker, assembler, preprocessor, etc) without any indication that
+# you cannot feed such options to the gcc driver directly.  (For example, the
+# linker takes a -z option, but you must type -Wl,-z for gcc.)  Instead, we
+# ask the driver ("g++") for the name of the compiler ("cc1"), and parse the
+# --help output of the compiler.
+#
+have gcc &&
+_gcc()
+{
+	local cc gcc backend
+
+	case "$2" in
+	-*)
+		;;
+	*)
+		return
+		;;
+	esac
+
+	case "$1" in
+	\~*)
+		eval gcc=$1
+		;;
+        *)
+		gcc="$1"
+		;;
+	esac
+
+	case "$gcc" in
+	gcj)
+		backend=jc1
+		;;
+	*77)
+		backend=f771
+		;;
+	*)
+		backend=cc1	# [near-]universal backend
+		;;
+    esac
+
+    cc=$( $gcc -print-prog-name=$backend )
+
+    # sink stderr:
+    # for C/C++/ObjectiveC it's useless
+    # for FORTRAN/Java it's an error
+    COMPREPLY=( $( $cc --help 2>/dev/null | tr '\t' ' ' | \
+                  sed -e '/^  *-/!d' -e 's/ *-\([^ ]*\).*/-\1/' | \
+                  grep ^"$2" | sort -u ) )
+}
+[ "$have" ] && complete -o default -F _gcc gcc g++ c++ g77 gcj
+[ $OS = Linux ] && complete -o default -F _gcc cc
+
 # bash alias completion
 #
 _alias()