Introduction#

I’m a demo documentation page.

-Wno-shift-overflow, -Wshift-overflow=n, -Wshift-overflow#

Note

Default value is -Wno-shift-overflow, -Wshift-overflow is enabled by -Wall.

These options control warnings about left shift overflows.

-Wshift-overflow=1: This is the warning level of -Wshift-overflow and …

-Wno-shift-overflow2, -Wshift-overflow2=n (non-default), -Wshift-overflow2 (non-default)#

These options control warnings about left shift overflows.

-Wshift-overflow2=1: This is the warning level of -Wshift-overflow2 and …

-Wno-shift-overflow3#: Default option value for -Wshift-overflow3.

-Wshift-overflow3=n, -Wshift-overflow3#

These options control warnings about left shift overflows.

-Wshift-overflow3=1: This is the warning level of -Wshift-overflow3 and -Wshift-overflow3 and -Wshift-overflow3 and -Wshift-overflow3 and -Wshift-overflow3 and …

Enabled by -Wall.

-Wauggest-attribute=[pure|const|noreturn|format|cold|malloc]#: Suggest it.

Todo

Improve wording!

-Wall#

Enable it all :)

Test this: -Wall-like-all.

I am a super-command. I am strong and I am emphasis.

extern void *
my_memcpy (void *dest, const void *src, size_t len)
        __attribute__((nonnull (1, 2)));

void fatal () __attribute__ ((noreturn));

void
fatal (/* ... */)
{
  /* ... */ /* Print error message. */ /* ... */
  exit (1);
}

Show Samp with a variable.

Show it:

gcc a.c
./a.out

Code block:

gcc a.c
./a.out

Note1: ([1]) Note2: ([2])

Diagnostic Message Formatting Options

See Options to Control Diagnostic Messages Formatting.

-fmessage-length=n -fdiagnostics-plain-output -fdiagnostics-show-location=[once|every-line] -fdiagnostics-color=[auto|never|always] -fdiagnostics-urls=[auto|never|always] -fdiagnostics-format=[text|json] -fno-diagnostics-show-option -fno-diagnostics-show-caret -fno-diagnostics-show-labels -fno-diagnostics-show-line-numbers -fno-diagnostics-show-cwe -fdiagnostics-minimum-margin-width=width -fdiagnostics-parseable-fixits -fdiagnostics-generate-patch -fdiagnostics-show-template-tree -fno-elide-type -fdiagnostics-path-format=[none|separate-events|inline-events] -fdiagnostics-show-path-depths -fno-show-column -fdiagnostics-column-unit=[display|byte] -fdiagnostics-column-origin=origin -fdiagnostics-escape-format=[unicode|bytes]

-fdiagnostics-escape-format=[unicode|bytes]
-fdiagnostics-escape-format=[unicode|bytes]
-fdiagnostics-escape-format=[unicode|bytes]
-fdiagnostics-escape-format=[unicode|bytes]
-fdiagnostics-escape-format=[unicode|bytes]
-fdiagnostics-escape-format=[unicode|bytes]
-fdiagnostics-escape-format=[unicode|bytes]
-fdiagnostics-escape-format=[unicode|bytes]

Static Analyzer Options

-fanalyzer -fanalyzer-call-summaries -fanalyzer-checker=name -fno-analyzer-feasibility -fanalyzer-fine-grained -fanalyzer-state-merge -fanalyzer-state-purge -fanalyzer-transitivity -fanalyzer-verbose-edges -fanalyzer-verbose-state-changes -fanalyzer-verbosity=level -fdump-analyzer -fdump-analyzer-stderr -fdump-analyzer-callgraph -fdump-analyzer-exploded-graph -fdump-analyzer-exploded-nodes -fdump-analyzer-exploded-nodes-2 -fdump-analyzer-exploded-nodes-3 -fdump-analyzer-exploded-paths -fdump-analyzer-feasibility -fdump-analyzer-json -fdump-analyzer-state-purge -fdump-analyzer-supergraph -Wno-analyzer-double-fclose -Wno-analyzer-double-free -Wno-analyzer-exposure-through-output-file -Wno-analyzer-file-leak -Wno-analyzer-free-of-non-heap -Wno-analyzer-malloc-leak -Wno-analyzer-mismatching-deallocation -Wno-analyzer-null-argument -Wno-analyzer-null-dereference -Wno-analyzer-possible-null-argument -Wno-analyzer-possible-null-dereference -Wno-analyzer-shift-count-negative -Wno-analyzer-shift-count-overflow -Wno-analyzer-stale-setjmp-buffer -Wno-analyzer-tainted-allocation-size -Wno-analyzer-tainted-array-index -Wno-analyzer-tainted-divisor -Wno-analyzer-tainted-offset -Wno-analyzer-tainted-size -Wanalyzer-too-complex -Wno-analyzer-unsafe-call-within-signal-handler -Wno-analyzer-use-after-free -Wno-analyzer-use-of-pointer-in-stale-stack-frame -Wno-analyzer-use-of-uninitialized-value -Wno-analyzer-write-to-const -Wno-analyzer-write-to-string-literal

My name is Karlíček Końíčku and François-Xavier.