diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rwxr-xr-x | unix/configure | 6 | ||||
| -rw-r--r-- | unix/configure.in | 6 |
3 files changed, 14 insertions, 4 deletions
@@ -1,3 +1,9 @@ +2011-06-30 Reinhard Max <max@suse.de> + + * unix/configure.in: Add a volatile declaration to the test for + TCL_STACK_GROWS_UP to prevent gcc 4.6 from producing invalid + results due to aggressive optimisation. + 2011-06-23 Don Porter <dgp@users.sourceforge.net> *** 8.5.10 TAGGED FOR RELEASE *** diff --git a/unix/configure b/unix/configure index ed71de0..aa792a7 100755 --- a/unix/configure +++ b/unix/configure @@ -18705,10 +18705,12 @@ cat >>conftest.$ac_ext <<_ACEOF int StackGrowsUp(int *parent) { int here; + volatile int result; if (parent) - return (&here < parent); + result = (&here < parent); else - return StackGrowsUp(&here); + result = StackGrowsUp(&here); + return result; } int main (int argc, char *argv[]) { return StackGrowsUp(0); diff --git a/unix/configure.in b/unix/configure.in index e30c937..3394369 100644 --- a/unix/configure.in +++ b/unix/configure.in @@ -705,10 +705,12 @@ AC_CACHE_CHECK([if the C stack grows upwards in memory], tcl_cv_stack_grows_up, AC_TRY_RUN([ int StackGrowsUp(int *parent) { int here; + volatile int result; if (parent) - return (&here < parent); + result = (&here < parent); else - return StackGrowsUp(&here); + result = StackGrowsUp(&here); + return result; } int main (int argc, char *argv[]) { return StackGrowsUp(0); |