From f4583f7480bd2134ee09ec38f369f68c81bfc7cb Mon Sep 17 00:00:00 2001
From: Kefu Chai <tchaikov@gmail.com>
Date: Thu, 18 Jun 2020 17:58:24 -0700
Subject: [PATCH] add WITH_EXAMPLES options to cmake and cleanups. (#6580)

Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/6580

Reviewed By: cheng-chang

Differential Revision: D21846336

Pulled By: ajkr

fbshipit-source-id: e5bb0152a0876061d4ff158e7144eb9cc5a88cad
---
 CMakeLists.txt             |  5 +++++
 examples/CMakeLists.txt    | 45 ++++++++++++++++++++++++++++++++++++++
 examples/simple_example.cc |  2 +-
 3 files changed, 51 insertions(+), 1 deletion(-)
 create mode 100644 examples/CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 631c6d03c..7170dcc53 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1269,3 +1269,8 @@ if(WITH_TOOLS)
   add_custom_target(tools
     DEPENDS ${tool_deps})
 endif()
+
+option(WITH_EXAMPLES "build with examples" OFF)
+if(WITH_EXAMPLES)
+  add_subdirectory(examples)
+endif()
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
new file mode 100644
index 000000000..0b93a6d8d
--- /dev/null
+++ b/examples/CMakeLists.txt
@@ -0,0 +1,45 @@
+add_executable(simple_example
+  simple_example.cc)
+target_link_libraries(simple_example
+  ${ROCKSDB_LIB})
+
+add_executable(column_families_example
+  column_families_example.cc)
+target_link_libraries(column_families_example
+  ${ROCKSDB_LIB})
+
+add_executable(compact_files_example
+  compact_files_example.cc)
+target_link_libraries(compact_files_example
+  ${ROCKSDB_LIB})
+
+add_executable(c_simple_example
+  c_simple_example.c)
+target_link_libraries(c_simple_example
+  ${ROCKSDB_LIB})
+
+add_executable(optimistic_transaction_example
+  optimistic_transaction_example.cc)
+target_link_libraries(optimistic_transaction_example
+  ${ROCKSDB_LIB})
+
+add_executable(transaction_example
+  transaction_example.cc)
+target_link_libraries(transaction_example
+  ${ROCKSDB_LIB})
+
+add_executable(compaction_filter_example
+  compaction_filter_example.cc)
+target_link_libraries(compaction_filter_example
+  ${ROCKSDB_LIB})
+
+add_executable(options_file_example
+  options_file_example.cc)
+target_link_libraries(options_file_example
+  ${ROCKSDB_LIB})
+
+add_executable(multi_processes_example
+  EXCLUDE_FROM_ALL
+  multi_processes_example.cc)
+target_link_libraries(multi_processes_example
+  ${ROCKSDB_LIB})
diff --git a/examples/simple_example.cc b/examples/simple_example.cc
index 256c965d7..98102c073 100644
--- a/examples/simple_example.cc
+++ b/examples/simple_example.cc
@@ -68,7 +68,7 @@ int main() {
   }
 
   PinnableSlice pinnable_val;
-  db->Get(ReadOptions(), db->DefaultColumnFamily(), "key1", &pinnable_val);
+  s = db->Get(ReadOptions(), db->DefaultColumnFamily(), "key1", &pinnable_val);
   assert(s.IsNotFound());
   // Reset PinnableSlice after each use and before each reuse
   pinnable_val.Reset();