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Note that the linker's --compress-debug-sections option overrides the compression status of any input debug sections.

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* ld.texinfo (--compress-debug-sections): Expand documentation of
	this option.
This commit is contained in:
Nick Clifton 2016-11-07 12:28:16 +00:00
parent b93bfa1980
commit 9af89fbaec
2 changed files with 27 additions and 11 deletions
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ld/ChangeLog
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@ -1,3 +1,8 @@
2016-11-07 Nick Clifton <nickc@redhat.com>
* ld.texinfo (--compress-debug-sections): Expand documentation of
this option.
2016-11-04 Nick Clifton <nickc@redhat.com>
* emultempl/elf32.em (search_needed): Remove use of getauxval and

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ld/ld.texinfo
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@ -2319,17 +2319,28 @@ hash tables. The default is @code{sysv}.
@itemx --compress-debug-sections=zlib
@itemx --compress-debug-sections=zlib-gnu
@itemx --compress-debug-sections=zlib-gabi
On ELF platforms , these options control how DWARF debug sections are
compressed using zlib. @option{--compress-debug-sections=none} doesn't
compress DWARF debug sections.
@option{--compress-debug-sections=zlib-gnu} compresses DWARF debug
sections and rename debug section names to begin with @samp{.zdebug}
instead of @samp{.debug}. @option{--compress-debug-sections=zlib}
and @option{--compress-debug-sections=zlib-gabi}
compress DWARF debug sections with SHF_COMPRESSED from the ELF ABI.
The default behaviour varies depending upon the target involved and
the configure options used to build the toolchain. The default can be
determined by examing the output from the linker's @option{--help} option.
On ELF platforms, these options control how DWARF debug sections are
compressed using zlib.
@option{--compress-debug-sections=none} doesn't compress DWARF debug
sections. @option{--compress-debug-sections=zlib-gnu} compresses
DWARF debug sections and renames them to begin with @samp{.zdebug}
instead of @samp{.debug}. @option{--compress-debug-sections=zlib-gabi}
also compresses DWARF debug sections, but rather than renaming them it
sets the SHF_COMPRESSED flag in the sections' headers.
The @option{--compress-debug-sections=zlib} option is an alias for
@option{--compress-debug-sections=zlib-gabi}.
Note that this option overrides any compression in input debug
sections, so if a binary is linked with @option{--compress-debug-sections=none}
for example, then any compressed debug sections in input files will be
uncompressed before they are copied into the output binary.
The default compression behaviour varies depending upon the target
involved and the configure options used to build the toolchain. The
default can be determined by examining the output from the linker's
@option{--help} option.
@kindex --reduce-memory-overheads
@item --reduce-memory-overheads