From f0f6b6a9752910fbd6cb506c5ae5ffe0761744e7 Mon Sep 17 00:00:00 2001
From: Hongze Cheng <hzcheng@taosdata.com>
Date: Fri, 12 Jul 2019 01:57:11 +0000
Subject: [PATCH] add lower version cmake support

---
 CMakeLists.txt                       | 6 +++---
 README.md                            | 2 +-
 deps/CMakeLists.txt                  | 2 +-
 deps/zlib-1.2.11/CMakeLists.txt      | 2 +-
 src/CMakeLists.txt                   | 2 +-
 src/client/CMakeLists.txt            | 2 +-
 src/connector/jdbc/CMakeLists.txt    | 2 +-
 src/kit/shell/CMakeLists.txt         | 2 +-
 src/kit/taosBenchmark/CMakeLists.txt | 2 +-
 src/kit/taosdump/CMakeLists.txt      | 2 +-
 src/modules/http/CMakeLists.txt      | 2 +-
 src/modules/monitor/CMakeLists.txt   | 2 +-
 src/rpc/CMakeLists.txt               | 2 +-
 src/sdb/CMakeLists.txt               | 2 +-
 src/system/CMakeLists.txt            | 6 ++++--
 src/util/CMakeLists.txt              | 2 +-
 16 files changed, 21 insertions(+), 19 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c21399ddea..bc3314e8ee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 PROJECT(TDengine)
 
 SET(CMAKE_C_STANDARD 11)
@@ -20,7 +20,7 @@ IF (${CMAKE_SYSTEM_NAME} MATCHES "Linux" OR UNIX)
 ENDIF ()
 
 #set debug & release related options
-SET(COMMON_FLAGS "-Wall -fPIC -malign-double -Wno-char-subscripts -malign-stringops -msse4.2 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
+SET(COMMON_FLAGS "-std=gnu99 -Wall -fPIC -malign-double -Wno-char-subscripts -malign-stringops -msse4.2 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
 SET(COMMON_CXX_FLAGS "${COMMON_FLAGS} -std=c++11")
 SET(DEBUG_FLAGS "-O0 -DDEBUG")
 
@@ -43,7 +43,7 @@ ENDIF ()
 #set output directory
 SET(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/build/lib)
 SET(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/build/bin)
-SET(TESTS_OUTPUT_DIR ${PROJECT_BINARY_DIR}/build/test)
+SET(TESTS_OUTPUT_DIR ${PROJECT_BINARY_DIR}/test)
 
 MESSAGE(STATUS "Project binary output path: " ${PROJECT_BINARY_DIR})
 MESSAGE(STATUS "Executable files output path: " ${EXECUTABLE_OUTPUT_PATH})
diff --git a/README.md b/README.md
index 42e3d0710f..dc216ea9a7 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ Refer to [TDengine Documentation](https://www.taosdata.com/en/documentation/)
 # Building
 At the moment, TDengine only supports building and running on Linux systems. You can choose to [install from packages](https://www.taosdata.com/en/getting-started/#Install-from-Package) or from the source code. This quick guide is for installation from the source only.
 
-To build TDengine, use [CMake](https://cmake.org/) 3.5 or higher versions in the project directory:
+To build TDengine, use [CMake](https://cmake.org/) 2.8 or higher versions in the project directory:
 
 ```cmd
 mkdir build && cd build
diff --git a/deps/CMakeLists.txt b/deps/CMakeLists.txt
index 235b444a98..bbd045000c 100644
--- a/deps/CMakeLists.txt
+++ b/deps/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
diff --git a/deps/zlib-1.2.11/CMakeLists.txt b/deps/zlib-1.2.11/CMakeLists.txt
index 704a242045..5a0f37dd6b 100644
--- a/deps/zlib-1.2.11/CMakeLists.txt
+++ b/deps/zlib-1.2.11/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 3ed07b45ea..7f12970bce 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
diff --git a/src/client/CMakeLists.txt b/src/client/CMakeLists.txt
index 6de31a4ff5..fa85256460 100755
--- a/src/client/CMakeLists.txt
+++ b/src/client/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
diff --git a/src/connector/jdbc/CMakeLists.txt b/src/connector/jdbc/CMakeLists.txt
index e795840503..69746c5b98 100644
--- a/src/connector/jdbc/CMakeLists.txt
+++ b/src/connector/jdbc/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
diff --git a/src/kit/shell/CMakeLists.txt b/src/kit/shell/CMakeLists.txt
index 7e0a5ca2e3..73714fac99 100644
--- a/src/kit/shell/CMakeLists.txt
+++ b/src/kit/shell/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
diff --git a/src/kit/taosBenchmark/CMakeLists.txt b/src/kit/taosBenchmark/CMakeLists.txt
index 4b6cf8c64b..196dc1f314 100644
--- a/src/kit/taosBenchmark/CMakeLists.txt
+++ b/src/kit/taosBenchmark/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
diff --git a/src/kit/taosdump/CMakeLists.txt b/src/kit/taosdump/CMakeLists.txt
index 1a65fd0051..8882ae8052 100644
--- a/src/kit/taosdump/CMakeLists.txt
+++ b/src/kit/taosdump/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
diff --git a/src/modules/http/CMakeLists.txt b/src/modules/http/CMakeLists.txt
index b21bd66bfc..58d2805e2f 100755
--- a/src/modules/http/CMakeLists.txt
+++ b/src/modules/http/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
diff --git a/src/modules/monitor/CMakeLists.txt b/src/modules/monitor/CMakeLists.txt
index ef6657ec95..35d28a9fac 100755
--- a/src/modules/monitor/CMakeLists.txt
+++ b/src/modules/monitor/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
diff --git a/src/rpc/CMakeLists.txt b/src/rpc/CMakeLists.txt
index bfcdced71d..af7b2af6cf 100755
--- a/src/rpc/CMakeLists.txt
+++ b/src/rpc/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
diff --git a/src/sdb/CMakeLists.txt b/src/sdb/CMakeLists.txt
index 26c75bb18e..5b9d997720 100755
--- a/src/sdb/CMakeLists.txt
+++ b/src/sdb/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
diff --git a/src/system/CMakeLists.txt b/src/system/CMakeLists.txt
index 6a7e431978..00dfd306ca 100755
--- a/src/system/CMakeLists.txt
+++ b/src/system/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
@@ -11,7 +11,9 @@ TARGET_LINK_LIBRARIES(taosd taos_static trpc tutil sdb monitor pthread http z)
 SET(PREPARE_ENV_CMD "prepare_env_cmd")
 SET(PREPARE_ENV_TARGET "prepare_env_target")
 ADD_CUSTOM_COMMAND(OUTPUT ${PREPARE_ENV_CMD}
-  POST_BUILD
+  POST_BUILD 
+  COMMAND echo "make test directory"
+  DEPENDS taosd
   COMMAND ${CMAKE_COMMAND} -E make_directory ${TESTS_OUTPUT_DIR}/cfg/
   COMMAND ${CMAKE_COMMAND} -E make_directory ${TESTS_OUTPUT_DIR}/log/
   COMMAND ${CMAKE_COMMAND} -E make_directory ${TESTS_OUTPUT_DIR}/data/
diff --git a/src/util/CMakeLists.txt b/src/util/CMakeLists.txt
index a19060ee52..dfcca250a8 100755
--- a/src/util/CMakeLists.txt
+++ b/src/util/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 PROJECT(TDengine)
 
-- 
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