Not enable jemalloc status printing if USE_CLANG=1

Summary: Warning is printed out with USE_CLANG=1 when including jemalloc.h. Disable it in that case.

Test Plan: Run db_bench with USE_CLANG=1 and not. Make sure they can all build and jemalloc status is printed out in the case where USE_CLANG is not set.

Reviewers: andrewkr, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57399

build_tools/fbcode_config.sh

@@ -61,7 +61,6 @@ CFLAGS+=" -DGFLAGS=google"
 # location of jemalloc
 JEMALLOC_INCLUDE=" -I $JEMALLOC_BASE/include/"
 JEMALLOC_LIB=" $JEMALLOC_BASE/lib/libjemalloc.a"
-JEMALLOC=1
 
 if test -z $PIC_BUILD; then
   # location of numa
@@ -98,6 +97,7 @@ if [ -z "$USE_CLANG" ]; then
   CFLAGS+=" -B$BINUTILS/gold"
   CFLAGS+=" -isystem $GLIBC_INCLUDE"
   CFLAGS+=" -isystem $LIBGCC_INCLUDE"
+  JEMALLOC=1
 else
   # clang
   CLANG_INCLUDE="$CLANG_LIB/clang/*/include"

build_tools/fbcode_config4.8.1.sh

@@ -40,7 +40,6 @@ GFLAGS_LIBS=" $GFLAGS_BASE/lib/libgflags.a"
 # location of jemalloc
 JEMALLOC_INCLUDE=" -I $JEMALLOC_BASE/include"
 JEMALLOC_LIB="$JEMALLOC_BASE/lib/libjemalloc.a"
-JEMALLOC=1
 
 # location of numa
 NUMA_INCLUDE=" -I $NUMA_BASE/include/"
@@ -67,6 +66,7 @@ if [ -z "$USE_CLANG" ]; then
   CFLAGS="-B$BINUTILS/gold -m64 -mtune=generic"
   CFLAGS+=" -isystem $GLIBC_INCLUDE"
   CFLAGS+=" -isystem $LIBGCC_INCLUDE"
+  JEMALLOC=1
 else
   # clang
   CLANG_BIN="$CLANG_BASE/bin"

db/db_impl.cc

@@ -551,7 +551,7 @@ static void GetJemallocStatus(void* mstat_arg, const char* status) {
     return;
   }
 
-  snprintf(mstat->cur, buf_size, status);
+  snprintf(mstat->cur, buf_size, "%s", status);
   mstat->cur += status_len;
 }
 #endif  // ROCKSDB_JEMALLOC