diff options
| author | Jason Merrill <jason@redhat.com> | 2014-06-12 16:47:21 -0400 |
|---|---|---|
| committer | Jason Merrill <jason@gcc.gnu.org> | 2014-06-12 16:47:21 -0400 |
| commit | 62984918665f0c82b187293ba762bc2edb32ab92 (patch) | |
| tree | c0d0389e8a30820854148e9a086d0b15f452ac9f /gcc/c-family/c-opts.c | |
| parent | ca0e51a0e5983a68e47b5195b99a8805938ecc26 (diff) | |
| download | gcc-62984918665f0c82b187293ba762bc2edb32ab92.zip gcc-62984918665f0c82b187293ba762bc2edb32ab92.tar.gz gcc-62984918665f0c82b187293ba762bc2edb32ab92.tar.bz2 | |
Support -Wabi warning about backward compatibility.
gcc/c-family/
* c.opt (Wabi=, fabi-compat-version): New.
* c-opts.c (c_common_handle_option): Handle -Wabi=.
(c_common_post_options): Handle flag_abi_compat_version default.
Disallow -fabi-compat-version=1.
* c-common.h (abi_version_crosses): New.
gcc/cp/
* call.c (convert_arg_to_ellipsis): Use abi_version_crosses.
* cvt.c (type_promotes_to): Likewise.
* mangle.c (write_type, write_expression): Likewise.
(write_name, write_template_arg): Likewise.
(mangle_decl): Make alias based on flag_abi_compat_version.
Emit -Wabi warning here.
(finish_mangling_internal): Not here. Drop warn parm.
(finish_mangling_get_identifier, finish_mangling): Adjust.
(mangle_type_string, mangle_special_for_type): Adjust.
(mangle_ctor_vtbl_for_type, mangle_thunk): Adjust.
(mangle_guard_variable, mangle_tls_init_fn): Adjust.
(mangle_tls_wrapper_fn, mangle_ref_init_variable): Adjust.
From-SVN: r211594
Diffstat (limited to 'gcc/c-family/c-opts.c')
| -rw-r--r-- | gcc/c-family/c-opts.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/gcc/c-family/c-opts.c b/gcc/c-family/c-opts.c index 29e9a35..fbbc80e 100644 --- a/gcc/c-family/c-opts.c +++ b/gcc/c-family/c-opts.c @@ -456,6 +456,16 @@ c_common_handle_option (size_t scode, const char *arg, int value, handle_OPT_d (arg); break; + case OPT_Wabi_: + warn_abi = true; + if (value == 1) + { + warning (0, "%<-Wabi=1%> is not supported, using =2"); + value = 2; + } + flag_abi_compat_version = value; + break; + case OPT_fcanonical_system_headers: cpp_opts->canonical_system_headers = value; break; @@ -910,6 +920,22 @@ c_common_post_options (const char **pfilename) if (flag_declone_ctor_dtor == -1) flag_declone_ctor_dtor = optimize_size; + if (flag_abi_compat_version == 1) + { + warning (0, "%<-fabi-compat-version=1%> is not supported, using =2"); + flag_abi_compat_version = 2; + } + else if (flag_abi_compat_version == -1) + { + /* Generate compatibility aliases for ABI v2 (3.4-4.9) by default. */ + flag_abi_compat_version = (flag_abi_version == 0 ? 2 : 0); + + /* But don't warn about backward compatibility unless explicitly + requested with -Wabi=n. */ + if (flag_abi_version == 0) + warn_abi = false; + } + if (cxx_dialect >= cxx11) { /* If we're allowing C++0x constructs, don't warn about C++98 |