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Documentation tweaks.

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2018-03-29  Martin Liska  <mliska@suse.cz>

        PR lto/84995.
        * doc/invoke.texi: Document how LTO works with debug info.
        Describe auto-load support of binutils.  Mention 'x86-64'
        as valid option value of -march option.

From-SVN: r258953
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Martin Liska 2018-03-29 15:02:23 +02:00 • committed by Martin Liska
parent 036c9eb5d9
commit c7cb6c1788
2 changed files with 17 additions and 3 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2018-03-29 Martin Liska <mliska@suse.cz>
PR lto/84995.
* doc/invoke.texi: Document how LTO works with debug info.
Describe auto-load support of binutils. Mention 'x86-64'
as valid option value of -march option.
2018-03-29 Jakub Jelinek <jakub@redhat.com>
* config/i386/sse.md (<avx512>_blendm<mode>): Use <sseintprefix>.

13
gcc/doc/invoke.texi
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@ -9483,9 +9483,8 @@ strict version check, so bytecode files generated in one version of
GCC do not work with an older or newer version of GCC.
Link-time optimization does not work well with generation of debugging
information. Combining @option{-flto} with
@option{-g} is currently experimental and expected to produce unexpected
results.
information on systems other than those using a combination of ELF and
DWARF.
If you specify the optional @var{n}, the optimization and code
generation done at link time is executed in parallel using @var{n}
@ -9565,6 +9564,11 @@ need to support linker plugins to allow a full-featured build environment
@command{gcc-nm}, @command{gcc-ranlib} wrappers to pass the right options
to these tools. With non fat LTO makefiles need to be modified to use them.
Note that modern binutils provide plugin auto-load mechanism.
Installing the linker plugin into @file{$libdir/bfd-plugins} has the same
effect as usage of the command wrappers (@command{gcc-ar}, @command{gcc-nm} and
@command{gcc-ranlib}).
The default is @option{-fno-fat-lto-objects} on targets with linker plugin
support.
@ -26440,6 +26444,9 @@ the result might not run on different machines). Using @option{-mtune=native}
produces code optimized for the local machine under the constraints
of the selected instruction set.
@item x86-64
A generic CPU with 64-bit extensions.
@item i386
Original Intel i386 CPU@.