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Diffstat (limited to 'docs/env_variables.md')
| -rw-r--r-- | docs/env_variables.md | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/docs/env_variables.md b/docs/env_variables.md index f2642e56..c60821dc 100644 --- a/docs/env_variables.md +++ b/docs/env_variables.md @@ -10,6 +10,11 @@ Because they can't directly accept command-line options, the compile-time tools make fairly broad use of environmental variables: + - Most afl tools do not print any ouput if stout/stderr are redirected. + If you want to have the output into a file then set the AFL_DEBUG + environment variable. + This is sadly necessary for various build processes which fail otherwise. + - Setting AFL_HARDEN automatically adds code hardening options when invoking the downstream compiler. This currently includes -D_FORTIFY_SOURCE=2 and -fstack-protector-all. The setting is useful for catching non-crashing |