Add clangd-diag-all-source and run it

luprex/cpp/core/luasnap.cpp

@@ -103,7 +103,7 @@ void LuaSnap::deserialize(StreamBuffer *sb) {
     // Set up a stack frame manually.  Eris deserialization
     // should have left permstable and regcopy on the stack.
     assert(lua_gettop(state_) == 2);
-    LuaSpecial permstable(1);
+    [[maybe_unused]] LuaSpecial permstable(1);
     LuaSpecial regcopy(2);
     lua_pushnil(state_);
     lua_pushnil(state_);

luprex/cpp/core/util.hpp

@@ -503,7 +503,7 @@ constexpr auto dec = FormattedNumber<int>(0, false, 0, ' ', 6);
 // Returns zero if the string is empty, too long, or contains
 // invalid characters.
 //
-static constexpr uint64_t encode_token(std::string_view str) {
+[[maybe_unused]] static constexpr uint64_t encode_token(std::string_view str) {
     if (str.size() > 12) return 0;
     if (str.empty()) return 0;
 

luprex/cpp/drv/drvutil-linux.cpp

@@ -1,10 +1,12 @@
 
 #include <time.h>
+#include <unistd.h>
 #include <string>
 #include <cstring>
 #include <cassert>
 #include <cstdio>
 #include <pthread.h>
+#include "drvutil.hpp"
 
 namespace drvutil {