* Makefile.in: Tweak to work better with new utils/mingw front-end.

In utils:

winsup/utils/mingw

@@ -0,0 +1,89 @@
+#!/bin/sh
+# Front-end kludge to cause a Cygwin gcc to default to
+# an installed version of the MinGW components.
+
+#
+# Find the path to the compiler
+#
+compiler=$1; shift
+case "$compiler" in
+	*/*)	;;
+	*)	compiler=($(type "$compiler"))
+		compiler=${compiler[2]} ;;
+esac
+
+#
+# The mingw32 directory should live somewhere close by to the
+# compiler.  Search for it.
+#
+updir=$(dirname "$compiler")
+dir=$(cd "$updir"/..; pwd)
+[ "$dir" = '/' ] && dir=''
+mingw_dir=''
+for d in "$dir"/*-mingw32 "$dir"/usr/*-mingw32 "$dir"/*-mingw* "$dir"/usr/*-mingw*; do
+    case "$d" in
+	*\**)	continue ;;
+	*)	mingw_dir=$d; break;
+    esac
+done
+
+if [ -z "$mingw_dir" ]; then
+    echo "$0: couldn't find i686-pc-mingw32 directory" 1>&2
+    exit 1
+fi
+
+#
+# Inspect each argument throwing away ones that seem to try to include the
+# Cygwin environment.
+#
+newargs=()
+sawcomp() { return 1; }
+sawcfile() { return 1; }
+sawofile() { return 1; }
+eatnext() { return 1; }
+pushnext() { return 1; }
+for f do
+    if eatnext; then
+	eatnext() { return 1; }
+	continue;
+    fi
+    if pushnext; then
+	pushnext() { return 1; }
+    else
+	case "$f" in
+	    *cygwin/include*|*newlib*) continue ;;
+	    -c|-E)		sawcomp() { return 0; } ;;
+	    -isystem)	eatnext() { return 0; }; continue ;;
+	    -o)		pushnext() { return 0; } ; /bin/true ;;
+	    -*)		;;
+	    *.cc|*.c)	sawcfile() { return 0; } ;;
+	    *.o)		sawofile() { return 0; }; /bin/true  ;;
+	esac
+    fi
+    newargs[${#newargs[*]}]="$f"
+done
+
+# Set up a new set of arguments + also search the installed mingw
+# directory.
+set -- -B"$mingw_dir"/lib/ "${newargs[@]}"
+
+# Add some default options depending on whether this looks like
+# an attempt to link, compile, or both.
+if sawcomp || sawcfile; then
+    ccdir=$(dirname $($compiler -print-libgcc-file-name))
+    set -- -isystem "$ccdir"/include -D__MINGW32__ -D__MSVCRT__ -DWIN32 -D_WIN32 -D__WIN32 -D__WIN32__ -U__CYGWIN__ -Uunix -U__unix__ -U__unix -U __CYGWIN32__ -I"${mingw_dir}"/include "$@"
+    case "$compiler" in
+	*++*) set -- -nostdinc++ "$@" ;;
+	*) set -- -nostdinc "$@" ;;
+    esac
+fi
+
+if sawofile || ! sawcfile || ! sawcomp; then
+    w32api=$($compiler -print-file-name=libc.a)
+    w32api=$(cd $(dirname "$w32api")/w32api; pwd)
+    set -- "$@" -nostdlib -Wl,-nostdlib -L"$w32api" -lmingw32 -lgcc -lmoldname -lmingwex -lmsvcrt -lmingw32 -luser32 -lkernel32 -ladvapi32 -lshell32 -lmingw32 -lgcc -lmoldname -lmingwex -lmsvcrt
+    { sawofile || sawcfile; } && set -- "$mingw_dir"/lib/crt2.o "$@"
+fi
+
+# Execute the compiler with new mingw-specific options.
+exec $compiler "$@"