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| author | Ralf Wildenhues <Ralf.Wildenhues@gmx.de> | 2010-04-05 20:20:12 +0000 |
|---|---|---|
| committer | Ralf Wildenhues <rwild@gcc.gnu.org> | 2010-04-05 20:20:12 +0000 |
| commit | 53b7942513f504cb78d1f190836fc9b980da0ead (patch) | |
| tree | 05c9fabe08319bb7c7b43df806f58e1b0e8d2f95 /gcc/doc/invoke.texi | |
| parent | 7e0ec110d5f378316e04251072777b89a5e4ed74 (diff) | |
| download | gcc-53b7942513f504cb78d1f190836fc9b980da0ead.zip gcc-53b7942513f504cb78d1f190836fc9b980da0ead.tar.gz gcc-53b7942513f504cb78d1f190836fc9b980da0ead.tar.bz2 | |
Document LTO behavior with incompatible declarations.
gcc/:
* doc/invoke.texi (Optimize Options): Document that LTO
won't remove object access purely due to incompatible
declarations.
From-SVN: r157970
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 23a0f4a..341d1b7 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -7294,6 +7294,11 @@ regular (non-LTO) compilation. This means that if your build process was mixing languages before, all you need to add is @option{-flto} to all the compile and link commands. +If LTO encounters objects with C linkage declared with incompatible +types in separate translation units to be linked together (undefined +behavior according to ISO C99 6.2.7), a non-fatal diagnostic may be +issued. The behavior is still undefined at runtime. + If object files containing GIMPLE bytecode are stored in a library archive, say @file{libfoo.a}, it is possible to extract and use them in an LTO link if you are using @command{gold} as the linker (which, |