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| author | Jonathan Wakely <jwakely@redhat.com> | 2019-12-02 21:32:54 +0000 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2020-01-13 13:18:00 +0000 |
| commit | aef85e40e0c5e242f1a1883abc56159dcd90e7b0 (patch) | |
| tree | bc88af85a06a7a1164fcf7a73518bfca74bc8a04 | |
| parent | eb7c7c524556df5364f03adc20f6a9db20858484 (diff) | |
| download | gcc-aef85e40e0c5e242f1a1883abc56159dcd90e7b0.zip gcc-aef85e40e0c5e242f1a1883abc56159dcd90e7b0.tar.gz gcc-aef85e40e0c5e242f1a1883abc56159dcd90e7b0.tar.bz2 | |
doc: Note that some warnings depend on optimizations (PR 92757)
PR driver/92757
* doc/invoke.texi (Warning Options): Add caveat about some warnings
depending on optimization settings.
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/doc/invoke.texi | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f7df073..b2d12f4 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2020-01-13 Jonathan Wakely <jwakely@redhat.com> + + PR driver/92757 + * doc/invoke.texi (Warning Options): Add caveat about some warnings + depending on optimization settings. + 2020-01-13 Jakub Jelinek <jakub@redhat.com> PR tree-optimization/90838 diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index f2c805c..ab307b8 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -4575,6 +4575,11 @@ are being produced. This allows the use of new @option{-Wno-} options with old compilers, but if something goes wrong, the compiler warns that an unrecognized option is present. +The effectiveness of some warnings depends on optimizations also being +enabled. For example @option{-Wsuggest-final-types} is more effective +with link-time optimization and @option{-Wmaybe-uninitialized} will not +warn at all unless optimization is enabled. + @table @gcctabopt @item -Wpedantic @itemx -pedantic |