patches/gcc/4.4.3/110-trampolinewarn.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Mon Mar 28 01:05:18 2011 +0200 (2011-03-28)
changeset 2362 0888065f8c4d
parent 1611 e2516bba8fe5
permissions -rw-r--r--
cc/gcc: cleanup the _or_later logic

So far, we've had a version always select appropriate _or_later option,
which in turn would select all previous _or_later options.

Because the dependencies on companion libs were cumulative, that was
working OK. But the upcoming 4.6 will no longer depend on libelf, so
we can't keep the cumulative scheme we've been using so far.

Have each release family select the corresponding dependencies, instead
of relying on selecting previous _or_later.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
yann@1393
     1
diff -durN gcc-4.4.0.orig/gcc/builtins.c gcc-4.4.0/gcc/builtins.c
yann@1393
     2
--- gcc-4.4.0.orig/gcc/builtins.c	2009-03-30 19:42:27.000000000 +0200
yann@1393
     3
+++ gcc-4.4.0/gcc/builtins.c	2009-05-27 21:38:01.000000000 +0200
yann@1393
     4
@@ -5768,6 +5768,9 @@
yann@1393
     5
   trampolines_created = 1;
yann@1393
     6
   INITIALIZE_TRAMPOLINE (r_tramp, r_func, r_chain);
yann@1393
     7
 
yann@1393
     8
+  if (warn_trampolines)
yann@1393
     9
+    warning (OPT_Wtrampolines, "generating trampoline in object (requires executable stack)");
yann@1393
    10
+
yann@1393
    11
   return const0_rtx;
yann@1393
    12
 }
yann@1393
    13
 
yann@1393
    14
diff -durN gcc-4.4.0.orig/gcc/common.opt gcc-4.4.0/gcc/common.opt
yann@1393
    15
--- gcc-4.4.0.orig/gcc/common.opt	2009-03-28 18:28:45.000000000 +0100
yann@1393
    16
+++ gcc-4.4.0/gcc/common.opt	2009-05-27 21:38:01.000000000 +0200
yann@1393
    17
@@ -197,6 +197,10 @@
yann@1393
    18
 Common Var(warn_type_limits) Init(-1) Warning
yann@1393
    19
 Warn if a comparison is always true or always false due to the limited range of the data type
yann@1393
    20
 
yann@1393
    21
+Wtrampolines
yann@1393
    22
+Common Var(warn_trampolines) Init(1)
yann@1393
    23
+Warn whenever a trampoline is generated
yann@1393
    24
+
yann@1393
    25
 Wuninitialized
yann@1393
    26
 Common Var(warn_uninitialized) Warning
yann@1393
    27
 Warn about uninitialized automatic variables