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c.opt (Wpacked-bitfield-compat): Change init value to -1.

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* c.opt (Wpacked-bitfield-compat): Change init value to -1.
	* c-opts.c (c_common_post_options): If -W*packed-bitfield-compat
	was not supplied then set warn_packed_bitfield_compat to the
	default value of 1.
	* stor-layout.c (place_field): Check warn_packed_bitfield_compat
	against 1.

From-SVN: r143718
This commit is contained in:
Adam Nemet 2009-01-28 02:55:20 +00:00 committed by Adam Nemet
parent 2b5ba03731
commit bee6fa6d32
4 changed files with 16 additions and 2 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2009-01-27 Adam Nemet <anemet@caviumnetworks.com>
* c.opt (Wpacked-bitfield-compat): Change init value to -1.
* c-opts.c (c_common_post_options): If -W*packed-bitfield-compat
was not supplied then set warn_packed_bitfield_compat to the
default value of 1.
* stor-layout.c (place_field): Check warn_packed_bitfield_compat
against 1.
2009-01-27 Richard Guenther <rguenther@suse.de>
PR tree-optimization/38503

5
gcc/c-opts.c
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@ -1085,6 +1085,11 @@ c_common_post_options (const char **pfilename)
if (warn_sign_conversion == -1)
warn_sign_conversion = (c_dialect_cxx ()) ? 0 : warn_conversion;
/* -Wpacked-bitfield-compat is on by default for the C languages. The
warning is issued in stor-layout.c which is not part of the front-end so
we need to selectively turn it on here. */
if (warn_packed_bitfield_compat == -1)
warn_packed_bitfield_compat = 1;
/* Special format checking options don't work without -Wformat; warn if
they are used. */

2
gcc/c.opt
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@ -365,7 +365,7 @@ C ObjC Var(warn_override_init) Init(-1) Warning
Warn about overriding initializers without side effects
Wpacked-bitfield-compat
C ObjC C++ ObjC++ Var(warn_packed_bitfield_compat) Init(1) Warning
C ObjC C++ ObjC++ Var(warn_packed_bitfield_compat) Init(-1) Warning
Warn about packed bit-fields whose offset changed in GCC 4.4
Wparentheses

2
gcc/stor-layout.c
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@ -963,7 +963,7 @@ place_field (record_layout_info rli, tree field)
{
if (DECL_PACKED (field))
{
if (warn_packed_bitfield_compat)
if (warn_packed_bitfield_compat == 1)
inform
(input_location,
"Offset of packed bit-field %qD has changed in GCC 4.4",