Revision: 6712
http://ipcop.svn.sourceforge.net/ipcop/?rev=6712&view=rev
Author: gespinasse
Date: 2012-07-20 12:07:50 +0000 (Fri, 20 Jul 2012)
Log Message:
-----------
Fix gcc-4.4 strict-aliasing warnings
Modified Paths:
--------------
ipcop/trunk/lfs/gcc
Added Paths:
-----------
ipcop/trunk/src/patches/gcc-4.4.5_strict-aliasing.patch
Modified: ipcop/trunk/lfs/gcc
===================================================================
--- ipcop/trunk/lfs/gcc 2012-07-18 19:29:05 UTC (rev 6711)
+++ ipcop/trunk/lfs/gcc 2012-07-20 12:07:50 UTC (rev 6712)
@@ -147,6 +147,8 @@
cd $(DIR_APP) && patch -Np2 -i
$(DIR_PATCHES)/gcc-4.4.4_sparc-force-cpu.patch
# Remove #ident deprecation made by mistake and removed after gcc-4.4.
That fix many shadows warnings
cd $(DIR_APP) && sed -i '/T_IDENT/s/ | DEPRECATED//' libcpp/directives.c
+ # fix the strict-aliasing warnings, include in gcc-4.5
+ cd $(DIR_APP) && patch -p1 -i
$(DIR_PATCHES)/gcc-4.4.5_strict-aliasing.patch
@mkdir $(DIR_SRC)/gcc-build
Added: ipcop/trunk/src/patches/gcc-4.4.5_strict-aliasing.patch
===================================================================
--- ipcop/trunk/src/patches/gcc-4.4.5_strict-aliasing.patch
(rev 0)
+++ ipcop/trunk/src/patches/gcc-4.4.5_strict-aliasing.patch 2012-07-20
12:07:50 UTC (rev 6712)
@@ -0,0 +1,75 @@
+http://gcc.gnu.org/ml/gcc-patches/2009-05/msg01188.html
+
+Rediffed for some gcc-4.4.5 space/tab issues
+
+This patch silences the following warnings when building libgcc:
+
+unwind-dw2-fde.c:321: warning: dereferencing type-punned pointer will break
strict-aliasing rules
+unwind-dw2-fde.c:322: warning: dereferencing type-punned pointer will break
strict-aliasing rules
+unwind-dw2-fde.c:677: warning: dereferencing type-punned pointer will break
strict-aliasing rules
+unwind-dw2-fde.c:795: warning: dereferencing type-punned pointer will break
strict-aliasing rules
+unwind-dw2-fde.c:843: warning: dereferencing type-punned pointer will break
strict-aliasing rules
+
+Tested with a bootstrap on x86_64-linux and a regression test run on
+powerpc-linux, x86_64-linux and powerpc64-linux. Okay for the trunk?
+
+
+2009-05-18 Ben Elliston <[email protected]>
+
+ * unwind-dw2-fde.c (fde_unencoded_compare): Replace type punning
+ assignments with memcpy calls.
+ (add_fdes): Likewise.
+ (binary_search_unencoded_fdes): Likewise.
+ (linear_search_fdes): Eliminate type puns.
+
+
+--- gcc-4.4.5/gcc/unwind-dw2-fde.c.orig 2009-09-20 13:07:05.000000000
+0200
++++ gcc-4.4.5/gcc/unwind-dw2-fde.c 2012-07-20 08:43:33.000000000 +0200
+@@ -318,8 +318,9 @@
+ fde_unencoded_compare (struct object *ob __attribute__((unused)),
+ const fde *x, const fde *y)
+ {
+- const _Unwind_Ptr x_ptr = *(const _Unwind_Ptr *) x->pc_begin;
+- const _Unwind_Ptr y_ptr = *(const _Unwind_Ptr *) y->pc_begin;
++ _Unwind_Ptr x_ptr, y_ptr;
++ memcpy (&x_ptr, x->pc_begin, sizeof (_Unwind_Ptr));
++ memcpy (&y_ptr, y->pc_begin, sizeof (_Unwind_Ptr));
+
+ if (x_ptr > y_ptr)
+ return 1;
+@@ -674,7 +675,9 @@
+
+ if (encoding == DW_EH_PE_absptr)
+ {
+- if (*(const _Unwind_Ptr *) this_fde->pc_begin == 0)
++ _Unwind_Ptr ptr;
++ memcpy (&ptr, this_fde->pc_begin, sizeof (_Unwind_Ptr));
++ if (ptr == 0)
+ continue;
+ }
+ else
+@@ -792,8 +795,9 @@
+
+ if (encoding == DW_EH_PE_absptr)
+ {
+- pc_begin = ((const _Unwind_Ptr *) this_fde->pc_begin)[0];
+- pc_range = ((const _Unwind_Ptr *) this_fde->pc_begin)[1];
++ const _Unwind_Ptr *pc_array = (const _Unwind_Ptr *)
this_fde->pc_begin;
++ pc_begin = pc_array[0];
++ pc_range = pc_array[1];
+ if (pc_begin == 0)
+ continue;
+ }
+@@ -840,8 +844,10 @@
+ {
+ size_t i = (lo + hi) / 2;
+ const fde *const f = vec->array[i];
+- const void *pc_begin = ((const void *const*) f->pc_begin)[0];
+- const uaddr pc_range = ((const uaddr *) f->pc_begin)[1];
++ void *pc_begin;
++ uaddr pc_range;
++ memcpy (&pc_begin, (const void * const *) f->pc_begin, sizeof (void *));
++ memcpy (&pc_range, (const uaddr *) f->pc_begin + 1, sizeof (uaddr));
+
+ if (pc < pc_begin)
+ hi = i;
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