Make tests pass by default in UBSAN mode

- Adds macros to check if botan was compiled with a certain sanitizers.
- Automatically excludes the tests that are intended to provoke undefined
  behaviour from the test bench, when botan is compiled with UBSAN.
- Changes option `--avoid-undefined` to `--no-avoid-undefined` so the
  failing tests can be explicitly activated when needed.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/tests/main.cpp b/src/tests/main.cpp
index 5cf4e4fe3..0e0360783 100644
--- a/src/tests/main.cpp
+++ b/src/tests/main.cpp
@@ -60,7 +60,7 @@ int main(int argc, char* argv[])
       {
       const std::string arg_spec =
          "botan-test --verbose --help --data-dir= --pkcs11-lib= --provider= "
-         "--log-success --abort-on-first-fail --avoid-undefined "
+         "--log-success --abort-on-first-fail --no-avoid-undefined "
          "--run-long-tests --run-online-tests --test-runs=1 --drbg-seed= "
          "*suites";
 
@@ -85,7 +85,7 @@ int main(int argc, char* argv[])
          parser.flag_set("run-online-tests"),
          parser.flag_set("run-long-tests"),
          parser.flag_set("abort-on-first-fail"),
-         parser.flag_set("avoid-undefined"));
+         parser.flag_set("no-avoid-undefined"));
 
 #if defined(BOTAN_HAS_OPENSSL)
       if(opts.provider().empty() || opts.provider() == "openssl")