gfphoenix78 commented on code in PR #1513:
URL: https://github.com/apache/cloudberry/pull/1513#discussion_r2659263107


##########
contrib/pax_storage/src/cpp/comm/fast_io.cc:
##########
@@ -27,6 +27,13 @@
 
 #include "fast_io.h"
 
+#include <unistd.h>  // for pread
+
+// uring_likely may not be defined in older liburing versions
+#ifndef uring_likely
+#define uring_likely(x) __builtin_expect(!!(x), 1)

Review Comment:
   `__builtin_expect` is defined in GCC. It should be either guarded by GCC 
macro or generic implementation.
   Please refers to 
https://github.com/apache/cloudberry/blob/main/src/include/c.h#L306



##########
contrib/pax_storage/CMakeLists.txt:
##########
@@ -21,7 +21,10 @@ set(CMAKE_CXX_STANDARD 17)
 set(TOP_DIR ${PROJECT_SOURCE_DIR}/../..)
 set(CBDB_INCLUDE_DIR ${TOP_DIR}/src/include)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Werror 
-Werror=pessimizing-move  -Wno-unused-function -Wno-error=ignored-qualifiers 
-Wno-error=array-bounds  -Wuninitialized -Winit-self -Wstrict-aliasing 
-Wno-missing-field-initializers -Wno-unused-parameter -Wno-clobbered 
-Wno-sized-deallocation -g")
+# Base CXX flags
+# Note: -Wpessimizing-move is enabled by default in GCC 9+ and will be caught 
by -Werror
+# No need to explicitly add -Werror=pessimizing-move (which breaks GCC 8.x 
compatibility)
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Werror 
-Wno-unused-function -Wno-error=ignored-qualifiers -Wno-error=array-bounds 
-Wuninitialized -Winit-self -Wstrict-aliasing -Wno-missing-field-initializers 
-Wno-unused-parameter -Wno-clobbered -Wno-sized-deallocation -g")

Review Comment:
   `-Werror=pessimizing-move` is turned on in higher gcc. We should remove 
these `move` code in pax.



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