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author | Richard Biener <rguenther@suse.de> | 2023-01-25 13:28:01 +0100 |
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committer | Richard Biener <rguenther@suse.de> | 2023-01-25 13:37:23 +0100 |
commit | 64f66385086e6a957c337eef97aec01cf30c162d (patch) | |
tree | c5c145613cfd2d6553450a6cb502e8fd83fc946b | |
parent | da43e287d1917a25594f95c7c519ded637c7ea50 (diff) | |
download | gcc-64f66385086e6a957c337eef97aec01cf30c162d.zip gcc-64f66385086e6a957c337eef97aec01cf30c162d.tar.gz gcc-64f66385086e6a957c337eef97aec01cf30c162d.tar.bz2 |
Fixup LTO internal docs for option processing
Andreas noticed that when I removed lto_read_all_file_options I
failed to update the internals manual which refers to it. The
following attempts to reflect the current situation.
* doc/lto.texi (Command line options): Reword and update reference
to removed lto_read_all_file_options.
-rw-r--r-- | gcc/doc/lto.texi | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/gcc/doc/lto.texi b/gcc/doc/lto.texi index e591e8d..eb5f54b 100644 --- a/gcc/doc/lto.texi +++ b/gcc/doc/lto.texi @@ -170,13 +170,11 @@ object files. This is used at link time to determine the optimization level and other settings when they are not explicitly specified at the linker command line. -Currently, GCC does not support combining LTO object files compiled -with different set of the command line options into a single binary. -At link time, the options given on the command line and the options -saved on all the files in a link-time set are applied globally. No -attempt is made at validating the combination of flags (other than the -usual validation done by option processing). This is implemented in -@file{lto/lto.cc}:@code{lto_read_all_file_options}. +Most options are recorded at a per function level and their setting +restored when processing the functions at link time. Global options +are composed from options specified at compile time and link time. +How exactly they are combined or mismatches diagnosed is implemented in +@file{lto-wrapper.cc}:@code{find_and_merge_options}. @item Symbol table (@code{.gnu.lto_.symtab}) |