[mpich-commits] [mpich] MPICH primary repository branch, master, updated. v3.1.2-136-g81bd43e

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http://git.mpich.org/mpich.git/commitdiff/81bd43e1f18da6031891ad87d9fdec075d3e657c

commit 81bd43e1f18da6031891ad87d9fdec075d3e657c
Author: Rob Latham <robl at mcs.anl.gov>
Date:   Thu Aug 28 14:36:47 2014 -0500

    Ask the compiler to warn if stack oddly large
    
    A flag like this would have warned about #2160 at compile time.
    
    See #2060
    
    Signed-off-by: Antonio J. Pena <apenya at mcs.anl.gov>

diff --git a/confdb/aclocal_cc.m4 b/confdb/aclocal_cc.m4
index e2dd692..92e7ee1 100644
--- a/confdb/aclocal_cc.m4
+++ b/confdb/aclocal_cc.m4
@@ -461,6 +461,13 @@ export enable_strict_done
 if test "$enable_strict_done" != "yes" ; then
 
     # Some comments on strict warning options.
+    # These were added to improve portability
+    #   -Wstack-usage=262144 -- 32 bit FreeBSD did not like the mprobe test
+    #       allocating a big variable on the stack. (See tt#2160).  The "right"
+    #       value requires further investigation; 1 MiB would have at least
+    #       caught #2160 at compile-time, and only two other tests show a
+    #       warning at 256k.
+    #
     # These were added to reduce warnings:
     #   -Wno-missing-field-initializers  -- We want to allow a struct to be 
     #       initialized to zero using "struct x y = {0};" and not require 
@@ -551,6 +558,7 @@ if test "$enable_strict_done" != "yes" ; then
         -Wno-format-zero-length
         -Wtype-limits
         -Werror-implicit-function-declaration
+        -Wstack-usage=262144
     "
 
     enable_c89=no

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

Summary of changes:
 confdb/aclocal_cc.m4 |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)


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