[rtems commit] rtems: Change CONTEXT_FP_SIZE define

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    f455cdeabe554cf2bde599aa184aacb84cfa5681
Changeset: http://git.rtems.org/rtems/commit/?id=f455cdeabe554cf2bde599aa184aacb84cfa5681

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Wed Jun  3 00:20:54 2015 +0200

rtems: Change CONTEXT_FP_SIZE define

Define CONTEXT_FP_SIZE to zero in case hardware and software floating
point support is disabled.  The problem is that empty structures have a
different size in C and C++.  In C++ they have a non-zero size leading
to an overestimate of the workspace size.

---

 cpukit/score/include/rtems/score/context.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/cpukit/score/include/rtems/score/context.h b/cpukit/score/include/rtems/score/context.h
index 4619985..7e59f05 100644
--- a/cpukit/score/include/rtems/score/context.h
+++ b/cpukit/score/include/rtems/score/context.h
@@ -43,7 +43,11 @@ extern "C" {
  *  This constant defines the number of bytes required
  *  to store a full floating point context.
  */
-#define CONTEXT_FP_SIZE CPU_CONTEXT_FP_SIZE
+#if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE )
+  #define CONTEXT_FP_SIZE CPU_CONTEXT_FP_SIZE
+#else
+  #define CONTEXT_FP_SIZE 0
+#endif
 
 /**
  *  @brief Initialize context area.