diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 60 |
1 files changed, 55 insertions, 5 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 215ab0d..efcf3bf 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -317,7 +317,8 @@ Objective-C and Objective-C++ Dialects}. -fno-show-column -fdiagnostics-column-unit=@r{[}display@r{|}byte@r{]} -fdiagnostics-column-origin=@var{origin} --fdiagnostics-escape-format=@r{[}unicode@r{|}bytes@r{]}} +-fdiagnostics-escape-format=@r{[}unicode@r{|}bytes@r{]} +-fdiagnostics-text-art-charset=@r{[}none@r{|}ascii@r{|}unicode@r{|}emoji@r{]}} @item Warning Options @xref{Warning Options,,Options to Request or Suppress Warnings}. @@ -2506,6 +2507,18 @@ change in incompatible ways in future releases. GNU dialect of @option{-std=c++2b}. Support is highly experimental, and will almost certainly change in incompatible ways in future releases. + +@item c++2c +@itemx c++26 +The next revision of the ISO C++ standard, planned for +2026. Support is highly experimental, and will almost certainly +change in incompatible ways in future releases. + +@item gnu++2c +@itemx gnu++26 +GNU dialect of @option{-std=c++2c}. Support is highly experimental, +and will almost certainly change in incompatible ways in future +releases. @end table @opindex aux-info @@ -5078,7 +5091,8 @@ options: -fno-diagnostics-show-line-numbers -fdiagnostics-color=never -fdiagnostics-urls=never --fdiagnostics-path-format=separate-events} +-fdiagnostics-path-format=separate-events +-fdiagnostics-text-art-charset=none} In the future, if GCC changes the default appearance of its diagnostics, the corresponding option to disable the new behavior will be added to this list. @@ -5604,6 +5618,25 @@ Unicode characters. For the example above, the following will be printed: before<CF><80><BF>after @end smallexample +@opindex fdiagnostics-text-art-charset +@item -fdiagnostics-text-art-charset=@var{CHARSET} +Some diagnostics can contain ``text art'' diagrams: visualizations created +from text, intended to be viewed in a monospaced font. + +This option selects which characters should be used for printing such +diagrams, if any. @var{CHARSET} is @samp{none}, @samp{ascii}, @samp{unicode}, +or @samp{emoji}. + +The @samp{none} value suppresses the printing of such diagrams. +The @samp{ascii} value will ensure that such diagrams are pure ASCII +(``ASCII art''). The @samp{unicode} value will allow for conservative use of +unicode drawing characters (such as box-drawing characters). The @samp{emoji} +value further adds the possibility of emoji in the output (such as emitting +U+26A0 WARNING SIGN followed by U+FE0F VARIATION SELECTOR-16 to select the +emoji variant of the character). + +The default is @samp{emoji}. + @opindex fdiagnostics-format @item -fdiagnostics-format=@var{FORMAT} Select a different format for printing diagnostics. @@ -10591,6 +10624,15 @@ offset as well as the capacity is symbolic. See @uref{https://cwe.mitre.org/data/definitions/119.html, CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer}. +For cases where the analyzer is able, it will emit a text art diagram +visualizing the spatial relationship between the memory region that the +analyzer predicts would be accessed, versus the range of memory that is +valid to access: whether they overlap, are touching, are close or far +apart; which one is before or after in memory, the relative sizes +involved, the direction of the access (read vs write), and, in some +cases, the values of data involved. This diagram can be suppressed +using @option{-fdiagnostics-text-art-charset=none}. + @opindex Wanalyzer-possible-null-argument @opindex Wno-analyzer-possible-null-argument @item -Wno-analyzer-possible-null-argument @@ -11101,6 +11143,12 @@ following warnings from @option{-fanalyzer}: -Wanalyzer-va-list-use-after-va-end } +@opindex fanalyzer-debug-text-art +@opindex fno-analyzer-debug-text-art +@item -fanalyzer-debug-text-art-headings +This option is intended for analyzer developers. If enabled, +the analyzer will add extra annotations to any diagrams it generates. + @opindex fanalyzer-feasibility @opindex fno-analyzer-feasibility @item -fno-analyzer-feasibility @@ -12077,10 +12125,12 @@ This option is enabled by default at optimization levels @option{-O1}, such as forming of fused multiply-add operations if the target has native support for them. @option{-ffp-contract=on} enables floating-point expression contraction -if allowed by the language standard. This is currently not implemented -and treated equal to @option{-ffp-contract=off}. +if allowed by the language standard. This is implemented for C and C++, +where it enables contraction within one expression, but not across +different statements. -The default is @option{-ffp-contract=fast}. +The default is @option{-ffp-contract=off} for C in a standards compliant mode +(@option{-std=c11} or similar), @option{-ffp-contract=fast} otherwise. @opindex fomit-frame-pointer @item -fomit-frame-pointer |