Applied work around for a compiler bug, see 3014609 for details (one

bullet source file needs to be compiled with one additional flag to
avoid this bug causing STK to crash).


git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@5820 178a84e3-b1eb-0310-8ba1-8eac791a3b58

configure.ac

@@ -397,7 +397,9 @@ esac
 SUMMARY="$SUMMARY\nUsing enet network support."
 ENETTREE="src/enet"
 
+# =================
 # Check for gettext
+# =================
 CHECK_GETTEXT(external)
 #disable/enable addons support
 AC_ARG_WITH(addons,[AS_HELP_STRING([--with-addons],
@@ -407,6 +409,18 @@ if test "x$with_addons" == "xyes" ; then
     echo "STK will compile with addons support"
     AC_DEFINE(ADDONS_MANAGER)
 fi
+# ==========================================
+# Check for a known compiler bug, details in 
+# src/bullet/src/Makefile.am
+# ==========================================
+ORIGCXXFLAGS="$CXXFLAGS"
+CXXFLAGS="$CXXFLAGS -fno-elide-constructors"
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
+                  AC_MSG_RESULT(yes); NOELIDE=-fno-elide-constructors,
+                  AC_MSG_RESULT(no); NOELIDE="")
+CXXFLAGS="$ORIGCXXFLAGS"
+AC_SUBST(NOELIDE) 
+
 # =========================
 # subst bars in Makefile.am
 # =========================

src/bullet/src/Makefile.am

@@ -16,6 +16,14 @@ libbulletmath_a_SOURCES	= \
 	LinearMath/btVector3.h			LinearMath/btHashMap.h		 \
 	LinearMath/btConvexHull.cpp		LinearMath/btConvexHull.h
 
+# Certain g++ versions causes stk to crash if btVoronoiSimplexSolver.cpp is
+# compiled with optimisations. Since it's rather difficult to specify certain
+# flags for one file only with auto-tools (you can only specify flags per
+# library, so you have to put this one file into a separate library) we compile
+# the whole libbulletcollision with the modified flags - i.e. by adding 
+# -fno-elide-constructors to the flags. The overall performance impact is
+# quite low anyway.
+libbulletcollision_a_CXXFLAGS = @NOELIDE@ 
 libbulletcollision_a_SOURCES = \
 	btBulletCollisionCommon.h						 \
 	BulletCollision/BroadphaseCollision/btAxisSweep3.cpp			 \