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Merge bitcoin/bitcoin#28999: build: Enable -Wunreachable-code

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fa8adbe7c17b16cf7ecd16eb9f3f1792e9da2876 build: Enable -Wunreachable-code (MarcoFalke)

Pull request description:

  It seems a bit confusing to write code after a `return`. This can even lead to bugs, or incorrect code, such as https://github.com/bitcoin/bitcoin/pull/28830/files#r1415372320 . (Edit: The linked instance is not found by clang's `-Wunreachable-code`).

  Fix all issues by enabling `-Wunreachable-code`.

  This flag also enables `-Wunreachable-code-loop-increment`, according to https://clang.llvm.org/docs/DiagnosticsReference.html#wunreachable-code, so remove that.

ACKs for top commit:
  ajtowns:
    > ACK [fa8adbe](fa8adbe7c1)
  stickies-v:
    ACK fa8adbe7c17b16cf7ecd16eb9f3f1792e9da2876
  jonatack:
    ACK fa8adbe7c17b16cf7ecd16eb9f3f1792e9da2876 tested with arm64 clang 17.0.6

Tree-SHA512: 12a2f74b69ae002e62ae08038f7458837090a12051a4c154d05ae4bb26fb19fc1fa76c63aedf2b3fbb36f048c593ca3b8c0efe03fe93cf07a0fd114fc84ce1e7
This commit is contained in:
fanquake 2023-12-11 15:31:51 +00:00
commit d5e5810bd3
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2 changed files with 5 additions and 3 deletions
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2
configure.ac
View File

@ -436,8 +436,8 @@ if test "$CXXFLAGS_overridden" = "no"; then
AX_CHECK_COMPILE_FLAG([-Wlogical-op], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wlogical-op"], [], [$CXXFLAG_WERROR]) AX_CHECK_COMPILE_FLAG([-Wlogical-op], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wlogical-op"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Woverloaded-virtual], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Woverloaded-virtual"], [], [$CXXFLAG_WERROR]) AX_CHECK_COMPILE_FLAG([-Woverloaded-virtual], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Woverloaded-virtual"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wsuggest-override], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wsuggest-override"], [], [$CXXFLAG_WERROR]) AX_CHECK_COMPILE_FLAG([-Wsuggest-override], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wsuggest-override"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wunreachable-code-loop-increment], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wunreachable-code-loop-increment"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wimplicit-fallthrough], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wimplicit-fallthrough"], [], [$CXXFLAG_WERROR]) AX_CHECK_COMPILE_FLAG([-Wimplicit-fallthrough], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wimplicit-fallthrough"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wunreachable-code], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wunreachable-code"], [], [$CXXFLAG_WERROR])
if test "$suppress_external_warnings" != "no" ; then if test "$suppress_external_warnings" != "no" ; then
AX_CHECK_COMPILE_FLAG([-Wdocumentation], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wdocumentation"], [], [$CXXFLAG_WERROR]) AX_CHECK_COMPILE_FLAG([-Wdocumentation], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wdocumentation"], [], [$CXXFLAG_WERROR])

6
src/wallet/walletdb.cpp
View File

@ -1499,17 +1499,19 @@ std::unique_ptr<WalletDatabase> MakeDatabase(const fs::path& path, const Databas
if (format == DatabaseFormat::SQLITE) { if (format == DatabaseFormat::SQLITE) {
#ifdef USE_SQLITE #ifdef USE_SQLITE
return MakeSQLiteDatabase(path, options, status, error); return MakeSQLiteDatabase(path, options, status, error);
#endif #else
error = Untranslated(strprintf("Failed to open database path '%s'. Build does not support SQLite database format.", fs::PathToString(path))); error = Untranslated(strprintf("Failed to open database path '%s'. Build does not support SQLite database format.", fs::PathToString(path)));
status = DatabaseStatus::FAILED_BAD_FORMAT; status = DatabaseStatus::FAILED_BAD_FORMAT;
return nullptr; return nullptr;
#endif
} }
#ifdef USE_BDB #ifdef USE_BDB
return MakeBerkeleyDatabase(path, options, status, error); return MakeBerkeleyDatabase(path, options, status, error);
#endif #else
error = Untranslated(strprintf("Failed to open database path '%s'. Build does not support Berkeley DB database format.", fs::PathToString(path))); error = Untranslated(strprintf("Failed to open database path '%s'. Build does not support Berkeley DB database format.", fs::PathToString(path)));
status = DatabaseStatus::FAILED_BAD_FORMAT; status = DatabaseStatus::FAILED_BAD_FORMAT;
return nullptr; return nullptr;
#endif
} }
} // namespace wallet } // namespace wallet