Fix build

Summary: FOLLY_HAVE_LIBJEMALLOC does not get defined, breaking builds in certain configurations (e.g., jemalloc present, Fedora 28 with cmake). FOLLY_USE_JEMALLOC does. Substitute former with latter,

Differential Revision: D10349332

fbshipit-source-id: e30245f8f19c6b2b7861cd88a4e1719a15c10fce

folly/experimental/JemallocHugePageAllocator.cpp

@@ -21,8 +21,7 @@
 
 #include <sstream>
 
-#if defined(MADV_HUGEPAGE) && defined(FOLLY_HAVE_LIBJEMALLOC) && !FOLLY_SANITIZE
-
+#if defined(MADV_HUGEPAGE) && defined(FOLLY_USE_JEMALLOC) && !FOLLY_SANITIZE
 #include <jemalloc/jemalloc.h>
 #if (JEMALLOC_VERSION_MAJOR >= 5)
 #define FOLLY_JEMALLOC_HUGE_PAGE_ALLOCATOR_SUPPORTED 1

folly/experimental/JemallocNodumpAllocator.h

@@ -21,7 +21,7 @@
 #include <folly/CPortability.h>
 #include <folly/portability/Config.h>
 
-#if defined(FOLLY_HAVE_LIBJEMALLOC) && !FOLLY_SANITIZE
+#if defined(FOLLY_USE_JEMALLOC) && !FOLLY_SANITIZE
 
 #include <folly/portability/SysMman.h>
 #include <jemalloc/jemalloc.h>
@@ -37,7 +37,7 @@
 #endif
 #endif
 
-#endif // FOLLY_HAVE_LIBJEMALLOC
+#endif // FOLLY_USE_JEMALLOC
 
 #include <cstddef>
 

folly/memory/test/MallctlHelperTest.cpp

@@ -20,7 +20,7 @@
 #include <folly/memory/Malloc.h>
 #include <folly/portability/GTest.h>
 
-#if defined(FOLLY_HAVE_LIBJEMALLOC) && !FOLLY_SANITIZE
+#if defined(FOLLY_USE_JEMALLOC) && !FOLLY_SANITIZE
 #include <jemalloc/jemalloc.h>
 #endif