mirror of
https://github.com/checkpoint-restore/criu.git
synced 2026-01-23 18:25:14 +00:00
c9fdd355f6
GCC's lto source:
> To avoid this problem the compiler must assume that it sees the
> whole program when doing link-time optimization. Strictly
> speaking, the whole program is rarely visible even at link-time.
> Standard system libraries are usually linked dynamically or not
> provided with the link-time information. In GCC, the whole
> program option (@option{-fwhole-program}) asserts that every
> function and variable defined in the current compilation
> unit is static, except for function @code{main} (note: at
> link time, the current unit is the union of all objects compiled
> with LTO). Since some functions and variables need to
> be referenced externally, for example by another DSO or from an
> assembler file, GCC also provides the function and variable
> attribute @code{externally_visible} which can be used to disable
> the effect of @option{-fwhole-program} on a specific symbol.
As far as I read gcc's source, ipa_comdats() will avoid placing symbols
that are either already in a user-defined section or have
externally_visible attribute into new optimized gcc sections.
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrei Vagin <avagin@gmail.com>
|
||
|---|---|---|
| .. | ||
| arch | ||
| asm-generic | ||
| bitops.h | ||
| bitsperlong.h | ||
| bug.h | ||
| compiler.h | ||
| err.h | ||
| list.h | ||
| lock.h | ||
| page.h | ||
| scm-code.c | ||
| scm.h | ||
| xmalloc.h | ||