$NetBSD$

Switch to C compiler before checking for _Bool.

--- configure.orig	2010-05-04 20:07:33.000000000 +0000
+++ configure
@@ -17621,6 +17621,11 @@ $as_echo "#define AA_APPLE_UNIVERSAL_BUI
   fi
 
 
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for stdbool.h that conforms to C99" >&5
 $as_echo_n "checking for stdbool.h that conforms to C99... " >&6; }
 if test "${ac_cv_header_stdbool_h+set}" = set; then :
@@ -17704,7 +17709,7 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_cxx_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"; then :
   ac_cv_header_stdbool_h=yes
 else
   ac_cv_header_stdbool_h=no
@@ -17713,7 +17718,7 @@ rm -f core conftest.err conftest.$ac_obj
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdbool_h" >&5
 $as_echo "$ac_cv_header_stdbool_h" >&6; }
-   ac_fn_cxx_check_type "$LINENO" "_Bool" "ac_cv_type__Bool" "$ac_includes_default"
+   ac_fn_c_check_type "$LINENO" "_Bool" "ac_cv_type__Bool" "$ac_includes_default"
 if test "x$ac_cv_type__Bool" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
@@ -17729,6 +17734,11 @@ $as_echo "#define HAVE_STDBOOL_H 1" >>co
 
    fi
 
+ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for long long int" >&5
 $as_echo_n "checking for long long int... " >&6; }
 if test "${ac_cv_type_long_long_int+set}" = set; then :
