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| author | Jakub Jelinek <jakub@redhat.com> | 2020-12-04 10:54:45 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2020-12-04 10:54:45 +0100 |
| commit | 65312dfc64744405326a9f4c243f1b4c8f21de1b (patch) | |
| tree | e9c5a9cae5d303385de694fe1b32e1c12a1e9fc0 /gcc/doc | |
| parent | 485b40a5270cf50a7304a9e5cb8aff96bfa3d901 (diff) | |
| download | gcc-65312dfc64744405326a9f4c243f1b4c8f21de1b.zip gcc-65312dfc64744405326a9f4c243f1b4c8f21de1b.tar.gz gcc-65312dfc64744405326a9f4c243f1b4c8f21de1b.tar.bz2 | |
dwarf: Add -gdwarf{32,64} options
The following patch makes the choice between 32-bit and 64-bit DWARF formats
selectable by command line switch, rather than being hardcoded through
DWARF_OFFSET_SIZE macro.
The options themselves don't turn on debug info themselves, so one needs
to use -g -gdwarf64 or similar.
2020-12-04 Jakub Jelinek <jakub@redhat.com>
* common.opt (-gdwarf32, -gdwarf64): New options.
* config/rs6000/rs6000.c (rs6000_option_override_internal): Default
dwarf_offset_size to 8 if not overridden from the command line.
* dwarf2out.c: Change all occurrences of DWARF_OFFSET_SIZE to
dwarf_offset_size.
* doc/invoke.texi (-gdwarf32, -gdwarf64): Document.
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 38c4d6a..671b297 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -453,7 +453,7 @@ Objective-C and Objective-C++ Dialects}. -gstabs -gstabs+ -gstrict-dwarf -gno-strict-dwarf @gol -gas-loc-support -gno-as-loc-support @gol -gas-locview-support -gno-as-locview-support @gol --gcolumn-info -gno-column-info @gol +-gcolumn-info -gno-column-info -gdwarf32 -gdwarf64 @gol -gstatement-frontiers -gno-statement-frontiers @gol -gvariable-location-views -gno-variable-location-views @gol -ginternal-reset-location-views -gno-internal-reset-location-views @gol @@ -9654,6 +9654,18 @@ information as possible into a separate output file with the extension debug information. To be useful, this option requires a debugger capable of reading @file{.dwo} files. +@item -gdwarf32 +@itemx -gdwarf64 +@opindex gdwarf32 +@opindex gdwarf64 +If DWARF debugging information is enabled, the @option{-gdwarf32} selects +the 32-bit DWARF format and the @option{-gdwarf64} selects the 64-bit +DWARF format. The default is target specific, on most targets it is +@option{-gdwarf32} though. The 32-bit DWARF format is smaller, but +can't support more than 2GiB of debug information in any of the DWARF +debug information sections. The 64-bit DWARF format allows larger debug +information and might not be well supported by all consumers yet. + @item -gdescribe-dies @opindex gdescribe-dies Add description attributes to some DWARF DIEs that have no name attribute, |