From 4d646ef579ee2f820a1cb0a7b0bd99b9a6cf20ea Mon Sep 17 00:00:00 2001
From: Kefu Chai <kchai@redhat.com>
Date: Thu, 17 May 2018 10:30:33 +0800
Subject: [PATCH] cmake: do not check for aligned_alloc() anymore

this reverts 16f0a67d

Fixes: http://tracker.ceph.com/issues/23653
Signed-off-by: Kefu Chai <kchai@redhat.com>
---
 cmake/modules/BuildRocksDB.cmake | 42 --------------------------------
 1 file changed, 42 deletions(-)

diff --git a/cmake/modules/BuildRocksDB.cmake b/cmake/modules/BuildRocksDB.cmake
index 10dfc1b3c6bf4..2a627e8a1c237 100644
--- a/cmake/modules/BuildRocksDB.cmake
+++ b/cmake/modules/BuildRocksDB.cmake
@@ -1,5 +1,3 @@
-include(CheckCXXSourceRuns)
-
 function(do_build_rocksdb)
   set(ROCKSDB_CMAKE_ARGS -DCMAKE_POSITION_INDEPENDENT_CODE=ON)
   list(APPEND ROCKSDB_CMAKE_ARGS -DWITH_GFLAGS=OFF)
@@ -38,37 +36,6 @@ function(do_build_rocksdb)
     ALWAYS 1)
 endfunction()
 
-function(check_aligned_alloc)
-  set(SAVE_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
-  set(CMAKE_REQUIRED_FLAGS "-std=c++11 -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-free")
-  if(LINUX)
-    set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -D_GNU_SOURCE")
-  endif()
-  set(SAVE_CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
-  set(CMAKE_REQUIRED_LIBRARIES ${GPERFTOOLS_TCMALLOC_LIBRARY})
-  CHECK_CXX_SOURCE_RUNS("
-#include <stdlib.h>
-
-int main()
-{
-#if defined(_ISOC11_SOURCE)
-  void* buf = aligned_alloc(64, 42);
-  free(buf);
-#endif
-}
-" HAVE_ALIGNED_ALLOC)
-  set(CMAKE_REQUIRED_FLAGS ${SAVE_CMAKE_REQUIRED_FLAGS})
-  set(CMAKE_REQUIRED_LIBRARIES ${SAVE_CMAKE_REQUIRED_LIBRARIES})
-
-  if(NOT HAVE_ALIGNED_ALLOC)
-    message(SEND_ERROR
-      "Incompatible tcmalloc v${TCMALLOC_VERSION_STRING} and rocksdb "
-      "v${ROCKSDB_VERSION_STRING}, please install gperf-tools 2.5 (not 2.5.93) "
-      "or >= 2.6.2, or switch to another allocator using "
-      "'cmake -DALLOCATOR=libc'.")
-  endif()
-endfunction()
-
 macro(build_rocksdb)
   do_build_rocksdb()
   add_library(rocksdb STATIC IMPORTED)
@@ -85,13 +52,4 @@ macro(build_rocksdb)
   endforeach()
   set(ROCKSDB_VERSION_STRING
     "${ROCKSDB_VERSION_MAJOR}.${ROCKSDB_VERSION_MINOR}.${ROCKSDB_VERSION_PATCH}")
-
-  if(ALLOCATOR MATCHES "tcmalloc(_minimal)?")
-    # see http://tracker.ceph.com/issues/21422
-    if(ROCKSDB_VERSION_STRING VERSION_GREATER 5.7 AND
-        TCMALLOC_VERSION_STRING VERSION_GREATER 2.5 AND
-        TCMALLOC_VERSION_STRING VERSION_LESS 2.6.2)
-      check_aligned_alloc()
-    endif()
-  endif()
 endmacro()
-- 
2.39.5