build: see if jemalloc works on macOS now

Author: mhx

CMakeLists.txt

@@ -50,12 +50,7 @@ if(NOT WIN32)
   option(ENABLE_TSAN "enable thread sanitizer" OFF)
   option(ENABLE_UBSAN "enable undefined behaviour sanitizer" OFF)
   option(ENABLE_COVERAGE "enable code coverage" OFF)
-  if(APPLE)
-    # This doesn't work reliably on macOS at the moment
-    set(USE_JEMALLOC OFF)
-  else()
-    option(USE_JEMALLOC "build with jemalloc" ON)
-  endif()
+  option(USE_JEMALLOC "build with jemalloc if available" ON)
   option(PREFER_SYSTEM_FAST_FLOAT "use system fast_float if available" OFF)
   option(PREFER_SYSTEM_GTEST "use system gtest if available" OFF)
   option(DISABLE_CCACHE "disable ccache" OFF)