[Cmake-commits] CMake branch, master, updated. v2.8.2-62-g70154ef

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- Log -----------------------------------------------------------------
http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=70154efef86c7025435b15c52a8a1a5b47067835
commit 70154efef86c7025435b15c52a8a1a5b47067835
Author:     Brad King <brad.king at kitware.com>
AuthorDate: Fri Jul 9 10:30:18 2010 -0400
Commit:     Brad King <brad.king at kitware.com>
CommitDate: Fri Jul 9 10:40:06 2010 -0400

    KWSys: Avoid undefined behavior in Process crash tests
    
    Clang is smart enough to recognize that "*(int*)0=0" invokes undefined
    behavior, warns, and produces an "undefined instruction".  The message
    in commit "Avoid Clang optimizer bug in testProcess-[45]" (2010-07-02)
    is incorrect; this is not a Clang bug.  It really is undefined
    behavior.  Use "*(int*)1=0" to produce a crash instead.

diff --git a/Source/kwsys/testProcess.c b/Source/kwsys/testProcess.c
index 6044917..877002a 100644
--- a/Source/kwsys/testProcess.c
+++ b/Source/kwsys/testProcess.c
@@ -94,9 +94,8 @@ int test4(int argc, const char* argv[])
   fprintf(stderr, "Output before crash on stderr from crash test.\n");  
   fflush(stdout);
   fflush(stderr);
-#if defined(__APPLE__) && defined(__x86_64__) && defined(__OPTIMIZE__) \
- && defined(__clang__)
-  *(int*)1 = 0; /* Clang's optimizer produces bad code for 0-ptr.  */
+#if defined(__clang__)
+  *(int*)1 = 0; /* Clang warns about 0-ptr; undefined behavior.  */
 #else
   *(int*)0 = 0;
 #endif

-----------------------------------------------------------------------

Summary of changes:
 Source/kwsys/testProcess.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)


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