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| author | Richard Biener <rguenther@suse.de> | 2019-09-11 11:20:35 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2019-09-11 11:20:35 +0000 |
| commit | 5a307ee54bca63865b6e5e8ad690720adf0b9d78 (patch) | |
| tree | 94e483c2a7f7db580d29f337e1cd73169eb6a10e /gcc/doc | |
| parent | 46dfa8ad6c18feb45d35734eae38798edb7c38cd (diff) | |
| download | gcc-5a307ee54bca63865b6e5e8ad690720adf0b9d78.zip gcc-5a307ee54bca63865b6e5e8ad690720adf0b9d78.tar.gz gcc-5a307ee54bca63865b6e5e8ad690720adf0b9d78.tar.bz2 | |
lto-opts.c (lto_write_options): Stream -g when debug is enabled.
2019-09-11 Richard Biener <rguenther@suse.de>
* lto-opts.c (lto_write_options): Stream -g when debug is enabled.
* lto-wrapper.c (merge_and_complain): Pick up -g.
(append_compiler_options): Likewise.
(run_gcc): Re-instantiate handling -g0 at link-time.
* doc/invoke.texi (flto): Document debug info generation.
From-SVN: r275640
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 234c1b7..6e91a66 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -10339,6 +10339,14 @@ conflicting translation units. Specifically precedence; and for example @option{-ffp-contract=off} takes precedence over @option{-ffp-contract=fast}. You can override them at link time. +To enable debug info generation you need to supply @option{-g} at +compile-time. If any of the input files at link time were built +with debug info generation enabled the link will enable debug info +generation as well. Any elaborate debug info settings +like the dwarf level @option{-gdwarf-5} need to be explicitely repeated +at the linker command line and mixing different settings in different +translation units is discouraged. + If LTO encounters objects with C linkage declared with incompatible types in separate translation units to be linked together (undefined behavior according to ISO C99 6.2.7), a non-fatal diagnostic may be |