Cygwin: Always configure in testsuite subdirectory

Doing this properly using AC_CONFIG_SUBDIRS is necessary to get the
correct paths in flags given to the compiler specified in CC/CXX.

winsup/Makefile.in

@@ -94,22 +94,8 @@ Makefile: Makefile.in $(srcdir)/configure config.status
 config.status: configure
 	$(SHELL) config.status --recheck
 
-# The below rule is intended to run configure only when "make check" is
-# actually specified, i.e., not in a cross-compilation environment.  The
-# cygwin configuration is copied and modified to ensure that the same configuration
-# parameters are passed when the testsuite is configured as when cygwin was configured.
 check: cygwin
-	@if [ -f testsuite/config.status ]; then \
-	    cd testsuite; \
-	else \
-	    (mkdir testsuite 2>/dev/null || exit 0); \
-	    cd testsuite; \
-	    sed -e 's%winsup/cygwin\>%winsup/testsuite%g' ../cygwin/config.status > config.status; \
-	    chmod a+x config.status; \
-	    sh ./config.status --recheck; \
-	    sh ./config.status; \
-	fi; \
-	$(MAKE) check
+	$(MAKE) -C testsuite check
 
 utils: cygwin
 

winsup/configure

@@ -674,7 +674,7 @@ CXX
 CXXFLAGS
 CCC
 CPP'
-ac_subdirs_all='cygwin cygserver doc
+ac_subdirs_all='cygwin cygserver doc testsuite
 utils'
 
 # Initialize some variables set by options.
@@ -3393,7 +3393,7 @@ done
 
 
 
-subdirs="$subdirs cygwin cygserver doc"
+subdirs="$subdirs cygwin cygserver doc testsuite"
 
 if test "x$with_cross_bootstrap" != "xyes"; then
     subdirs="$subdirs utils"

winsup/configure.ac

@@ -29,7 +29,7 @@ AC_LANG(C++)
 
 AC_CYGWIN_INCLUDES
 
-AC_CONFIG_SUBDIRS(cygwin cygserver doc)
+AC_CONFIG_SUBDIRS(cygwin cygserver doc testsuite)
 if test "x$with_cross_bootstrap" != "xyes"; then
     AC_CONFIG_SUBDIRS([utils])
 fi