This patch is in continuation of WT-1942. Patch merged under WT-1942 was meant to enable wiredtiger while building MongoDB server 3.2 on ppc64le architecture. However, that patch had one issue due to which on ppc64le, we get following error while building -

gcc -o build/opt/third_party/wiredtiger/src/block/block_ckpt.o -c -std=c99 -fno-omit-frame-pointer -fPIC -fno-strict-aliasing -ggdb -pthread -Wall -Wsign-compare -Wno-unknown-pragmas -Winvalid-pch -Werror -O2 -Wno-unused-local-typedefs -Wno-unused-function -Wno-deprecated-declarations -Wno-unused-but-set-variable -Wno-missing-braces -fno-builtin-memcmp -DPCRE_STATIC -DNDEBUG -DBOOST_THREAD_VERSION=4 -DBOOST_THREAD_DONT_PROVIDE_VARIADIC_THREAD -DBOOST_SYSTEM_NO_DEPRECATED -DBOOST_THREAD_DONT_PROVIDE_INTERRUPTIONS -DBOOST_THREAD_HAS_NO_EINTR_BUG -DHAVE_VERBOSE -DHAVE_FALLOCATE -DHAVE_SYNC_FILE_RANGE -D_GNU_SOURCE -DHAVE_BUILTIN_EXTENSION_ZLIB -DHAVE_BUILTIN_EXTENSION_SNAPPY -Isrc/third_party/snappy-1.1.2 -Isrc/third_party/zlib-1.2.8 -Ibuild/opt/third_party/wiredtiger -Isrc/third_party/wiredtiger -Ibuild/opt/third_party/wiredtiger/src/include -Isrc/third_party/wiredtiger/src/include -Ibuild/opt/third_party/wiredtiger/build_linux -Isrc/third_party/wiredtiger/build_linux src/third_party/wiredtiger/src/block/block_ckpt.c
In file included from src/third_party/wiredtiger/src/include/wt_internal.h:300:0,
from src/third_party/wiredtiger/src/async/async_api.c:9:
src/third_party/wiredtiger/src/include/gcc.h:182:10: error: expected '(' before 'volatile'
_asm_ volatile ("sync" ::: "memory"); \
^
src/third_party/wiredtiger/src/include/gcc.h:183:1: error: expected identifier or '(' before '}' token
} while (0)
^
src/third_party/wiredtiger/src/include/gcc.h:183:3: error: expected identifier or '(' before 'while'
} while (0)
^
Attached patch contains the fix for above issue. Kindly consider it for merging.