Need more positive control over C++

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1716 42af7a65-404d-4744-a932-0658087f49c3

5 files changed, 29 insertions, 15 deletions

diff --git a/nuttx/Documentation/NuttxPortingGuide.html b/nuttx/Documentation/NuttxPortingGuide.html
index e4e9fea33..692c36580 100644
--- a/nuttx/Documentation/NuttxPortingGuide.html
+++ b/nuttx/Documentation/NuttxPortingGuide.html
@@ -12,7 +12,7 @@
       <h1><big><font color="#3c34ec">
         <i>NuttX RTOS Porting Guide</i>
       </font></big></h1>
-      <p>Last Updated: April 8, 2009</p>
+      <p>Last Updated: April 19, 2009</p>
     </td>
   </tr>
 </table>
@@ -1539,18 +1539,27 @@ The system can be re-made subsequently by just typing <code>make</code>.
 <ul>
   <li><code>CONFIG_RRLOAD_BINARY</code>:
     Make the rrload binary format used with BSPs from <a href="www.ridgerun.com">ridgerun.com</a>
-     using the <code>tools/mkimage.sh</code> script.</li>
+    using the <code>tools/mkimage.sh</code> script.
+  </li>
   <li><code>CONFIG_INTELHEX_BINARY</code>:
     Make the Intel HEX binary format used with many different loaders using the GNU objcopy program
-    This option hould not be selected if you are not using the GNU toolchain.</li>
+    This option hould not be selected if you are not using the GNU toolchain.
+  </li>
   <li><code>CONFIG_MOTOROLA_SREC</code>:
     Make the Motorola S-Record binary format used with many different loaders using the GNU objcopy program
-    Should not be selected if you are not using the GNU toolchain.</li>
+    Should not be selected if you are not using the GNU toolchain.
+  </li>
   <li><code>CONFIG_RAW_BINARY</code>:
     mmke a raw binary format file used with many different loaders using the GNU objcopy program.
-    This option  should not be selected if you are not using the GNU toolchain.</li>
+    This option  should not be selected if you are not using the GNU toolchain.
+  </li>
   <li><code>CONFIG_HAVE_LIBM</code>:
-    Toolchain supports libm.a</li>
+    Toolchain supports libm.a
+  </li>
+  <li><code>CONFIG_HAVE_CXX</code>:
+    Toolchain supports C++ and <code>CXX</code>, <code>CXXFLAGS</code>, and <code>COMPILEXX</code>
+    have been defined in the configuratins <code>Make.defs</code> file.
+  </li>
 </ul>
 
 <h2>General OS setup</h2>
diff --git a/nuttx/Makefile b/nuttx/Makefile
index 0c4f292cc..e1cd92333 100644
--- a/nuttx/Makefile
+++ b/nuttx/Makefile
@@ -101,7 +101,7 @@ LINKLIBS	= sched/libsched$(LIBEXT) $(ARCH_SRC)/libarch$(LIBEXT) mm/libmm$(LIBEXT
 # Add libraries for network support.  CXX, CXXFLAGS, and COMPILEXX must
 # be defined in Make.defs for this to work!
 
-ifneq ($(CXX),)
+ifeq ($(CONFIG_HAVE_CXX),y)
 LINKLIBS	+= libxx/liblibxx$(LIBEXT)
 endif
 
@@ -203,10 +203,8 @@ sched/libsched$(LIBEXT): context
 lib/liblib$(LIBEXT): context
 	@$(MAKE) -C lib TOPDIR="$(TOPDIR)" liblib$(LIBEXT)
 
-ifneq ($(CXX),)
 libxx/liblibxx$(LIBEXT): context
 	@$(MAKE) -C libxx TOPDIR="$(TOPDIR)" liblibxx$(LIBEXT)
-endif
 
 $(ARCH_SRC)/libarch$(LIBEXT): context
 	@$(MAKE) -C $(ARCH_SRC) TOPDIR="$(TOPDIR)" libarch$(LIBEXT)
diff --git a/nuttx/configs/README.txt b/nuttx/configs/README.txt
index c7249039d..ba4d1b80d 100644
--- a/nuttx/configs/README.txt
+++ b/nuttx/configs/README.txt
@@ -154,6 +154,9 @@ defconfig -- This is a configuration file similar to the Linux
 		  different loaders using the GNU objcopy program.  This option
 		  should not be selected if you are not using the GNU toolchain.
 		CONFIG_HAVE_LIBM - toolchain supports libm.a
+		CONFIG_HAVE_CXX - toolchain supports C++ and CXX, CXXFLAGS, and
+		  COMPILEXX have been defined in the configuratins Make.defs
+		  file.
 
 	General OS setup
 
diff --git a/nuttx/examples/helloxx/Makefile b/nuttx/examples/helloxx/Makefile
index 40c9d6546..7210ea2f1 100755
--- a/nuttx/examples/helloxx/Makefile
+++ b/nuttx/examples/helloxx/Makefile
@@ -1,5 +1,5 @@
 ############################################################################
-# examples/hello/Makefile
+# examples/helloxx/Makefile
 #
 #   Copyright (C) 2009 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
@@ -52,10 +52,14 @@ all:	$(BIN)
 .PHONY:	clean depend chkcxx
 
 chkcxx:
-ifndef CXX
-	@echo "In order to use this example, you toolchain must support C++"
-	@echo "and CXX, CXXFLAGS, and COMPILEXX must be defined in the Make.defs"
-	@echo "file of the configuration that you are using."
+ifneq ($(CONFIG_HAVE_CXX),y)
+	@echo ""
+	@echo "In order to use this example, you toolchain must support must"
+	@echo ""
+	@echo "  (1) Explicitly seelct CONFIG_HAVE_CXX to build in C++ support"
+	@echo "  (2) Define CXX, CXXFLAGS, and COMPILEXX in the Make.defs file"
+	@echo "      of the configuration that you are using."
+	@echo ""
 	@exit 1
 endif
 
diff --git a/nuttx/examples/helloxx/main.cxx b/nuttx/examples/helloxx/main.cxx
index 7f8230c4a..df84375a2 100755
--- a/nuttx/examples/helloxx/main.cxx
+++ b/nuttx/examples/helloxx/main.cxx
@@ -1,5 +1,5 @@
 //***************************************************************************
-// examples/hello/main.c
+// examples/helloxx/main.c
 //
 //   Copyright (C) 2009 Gregory Nutt. All rights reserved.
 //   Author: Gregory Nutt <spudmonkey@racsa.co.cr>