Backing out cygwin make checks since there's no consistency in where the cygwin string resides.

client.mk

@@ -193,17 +193,6 @@ LOCALES_CO_TAG       =
 
 BUILD_MODULES = all
 
-#######################################################################
-# Check for cygwin make on win32
-#
-UNAME := $(shell uname -s)
-ifneq (,$(filter CYGWIN% WIN%,$(UNAME)))
-_IS_CYGWIN_MAKE := $(findstring cygwin,$(shell $(MAKE) -h))
-ifeq (,$(_IS_CYGWIN_MAKE))
-$(error Cygwin make is required to build Mozilla. If you typed 'gmake', try 'make' instead)
-endif
-endif
-
 #######################################################################
 # Defines
 #

configure.in

@@ -524,10 +524,6 @@ dnl on win32, gmake.exe is the generally the wrong version
 case "$host_os" in
 cygwin*|mingw*|mks*|msvc*)
     AC_PATH_PROGS(MAKE, $MAKE make gmake, :)
-    _cygwin_make=`$MAKE -h | grep cygwin 2>/dev/null`
-    if test -z "$_cygwin_make"; then
-        AC_MSG_ERROR([Cygwin make must be used to build Mozilla on win32.])
-    fi
     ;;
 *)
     AC_PATH_PROGS(MAKE, $MAKE gmake make, :)