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| author | Greg McGary <gkm@gnu.org> | 1999-12-03 19:02:20 +0000 |
|---|---|---|
| committer | Geoffrey Keating <geoffk@gcc.gnu.org> | 1999-12-03 19:02:20 +0000 |
| commit | 3c12fcc27809a223032e1b0ad2beba1f6844a5c6 (patch) | |
| tree | 7d5534785288859eef23b404bed24959cca1f313 /gcc/toplev.c | |
| parent | 7337695dc2c8f106fbad8b59ad2b4a2c9d413710 (diff) | |
| download | gcc-3c12fcc27809a223032e1b0ad2beba1f6844a5c6.zip gcc-3c12fcc27809a223032e1b0ad2beba1f6844a5c6.tar.gz gcc-3c12fcc27809a223032e1b0ad2beba1f6844a5c6.tar.bz2 | |
flags.h (warn_padded, [...]): Add global var decls.
* flags.h (warn_padded, warn_packed): Add global var decls.
* toplev.c (warn_padded, warn_packed): Add global var defns.
(W_options): Add warnings `-Wpacked' and `-Wpadded'.
* stor-layout.c (layout_record): Add local variable `type'
to hold often-used TREE_TYPE (field). Add local variable
`unpacked_align' to hold alignment that would be in force
if no `packed' attribute were present. Warn if `packed' attribute
is unnecessary, or even harmful. Warn when gcc inserts padding
to satisfy alignment requirements of members. Use NULL_TREE
when checking whether var_size is set.
* invoke.texi: Document new flags.
Co-Authored-By: Geoff Keating <geoffk@cygnus.com>
From-SVN: r30770
Diffstat (limited to 'gcc/toplev.c')
| -rw-r--r-- | gcc/toplev.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/gcc/toplev.c b/gcc/toplev.c index 0678915..70ea2a1 100644 --- a/gcc/toplev.c +++ b/gcc/toplev.c @@ -1258,6 +1258,14 @@ int warn_inline; int warn_aggregate_return; +/* Warn if packed attribute on struct is unnecessary and inefficient. */ + +int warn_packed; + +/* Warn when gcc pads a structure to an alignment boundary. */ + +int warn_padded; + /* Likewise for -W. */ lang_independent_options W_options[] = @@ -1276,7 +1284,11 @@ lang_independent_options W_options[] = {"uninitialized", &warn_uninitialized, 1, "Warn about unitialized automatic variables"}, {"inline", &warn_inline, 1, - "Warn when an inlined function cannot be inlined"} + "Warn when an inlined function cannot be inlined"}, + {"packed", &warn_packed, 1, + "Warn when the packed attribute has no effect on struct layout"}, + {"padded", &warn_padded, 1, + "Warn when padding is required to align struct members"} }; /* Output files for assembler code (real compiler output) |