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Diffstat (limited to 'src/development/gcc.md')
| -rw-r--r-- | src/development/gcc.md | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/src/development/gcc.md b/src/development/gcc.md index 7d34ac3..a0925c5 100644 --- a/src/development/gcc.md +++ b/src/development/gcc.md @@ -2,6 +2,15 @@ ## CLI +- `-v` verbose, outputs exact compiler/linker invocations made by the gcc driver +- `-###` dry-run, outputting exact compiler/linker invocations +- `-print-multi-lib` print available multilib configurations +- `--help=<class>` print description of cmdline options for given class, eg + `warnings`, `optimizers`, `target`, `c`, `c++` +- `-Wl,<opt>` additional option passed to the linker invocation (can + be specified multiple times) +- `-Wl,--trace` trace each file the linker touches + ### Preprocessing While debugging can be helpful to just pre-process files. @@ -10,10 +19,6 @@ gcc -E [-dM] ... ``` - `-E` run only preprocessor - `-dM` list only `#define` statements -- `-###` dry-run, outputting exact compiler/linker invocations -- `-print-multi-lib` print available multilib configurations -- `--help=<class>` print description of cmdline options for given class, eg - `warnings`, `optimizers`, `target`, `c`, `c++` ### Target options ```bash @@ -35,6 +40,21 @@ gcc --help=optimizers # instead showing their description. ``` +### Sanitizer +```bash +# Enable address sanitizer, a memory error checker (out of bounds, use after free, ..). +gcc -fsanitize=address ... + +# Enable leak sanitizer, a memory leak detector. +gcc -fsanitize=leak + +# Enable undefined behavior sanitizer, detects various UBs (integer overflow, ..). +gcc -fsanitize=undefined ... + +# Enable thread sanitizer, a data race detector. +gcc -fsanitize=thread +``` + ## [Builtins][builtins] ### `__builtin_expect(expr, cond)` |