From c7930b0a06f88d9a6e1545992422b20850474176 Mon Sep 17 00:00:00 2001
From: Kefu Chai <kchai@redhat.com>
Date: Tue, 20 Jul 2021 16:16:07 +0800
Subject: [PATCH] cmake: use string(APPEND ...) to concat strings

less repeating this way.

Signed-off-by: Kefu Chai <kchai@redhat.com>
---
 CMakeLists.txt     | 16 ++++++++--------
 src/CMakeLists.txt |  2 +-
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fb269c0e3e8f..7f0d378889a1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,8 +34,8 @@ if(WIN32)
 endif()
 
 if(MINGW)
-  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-allow-multiple-definition")
-  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-allow-multiple-definition")
+  string(APPEND CMAKE_SHARED_LINKER_FLAGS " -Wl,-allow-multiple-definition")
+  string(APPEND CMAKE_EXE_LINKER_FLAGS " -Wl,-allow-multiple-definition")
 
   # By default, cmake generates import libs for executables. The issue is that
   # for rados and rbd, the executable import lib overrides the library import lib.
@@ -120,15 +120,15 @@ if(WITH_STATIC_LIBSTDCXX)
     message(FATAL_ERROR "Please use GCC to enable WITH_STATIC_LIBSTDCXX")
   endif()
   set(static_linker_flags "-static-libstdc++ -static-libgcc")
-  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${static_linker_flags}")
-  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${static_linker_flags}")
+  string(APPEND CMAKE_SHARED_LINKER_FLAGS " ${static_linker_flags}")
+  string(APPEND CMAKE_EXE_LINKER_FLAGS " ${static_linker_flags}")
   unset(static_linker_flags)
   set(GPERFTOOLS_USE_STATIC_LIBS TRUE)
 endif()
 include(CheckCxxAtomic)
 if(NOT HAVE_CXX11_ATOMIC)
-  set(CMAKE_CXX_STANDARD_LIBRARIES
-    "${CMAKE_CXX_STANDARD_LIBRARIES} ${LIBATOMIC_LINK_FLAGS}")
+  string(APPEND CMAKE_CXX_STANDARD_LIBRARIES
+    " ${LIBATOMIC_LINK_FLAGS}")
 endif()
 
 option(WITH_RDMA "Enable RDMA in async messenger" ON)
@@ -566,8 +566,8 @@ if(sanitizers)
   find_package(Sanitizers REQUIRED ${sanitizers})
   add_compile_options(${Sanitizers_COMPILE_OPTIONS})
   string(REPLACE ";" " " sanitiers_compile_flags "${Sanitizers_COMPILE_OPTIONS}")
-  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${sanitiers_compile_flags}")
-  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${sanitiers_compile_flags}")
+  string(APPEND CMAKE_EXE_LINKER_FLAGS " ${sanitiers_compile_flags}")
+  string(APPEND CMAKE_SHARED_LINKER_FLAGS " ${sanitiers_compile_flags}")
 endif()
 
 # Rocksdb
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b72d916d1983..d139ace77e46 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -129,7 +129,7 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL GNU)
   # CMAKE_POSITION_INDEPENDENT_CODE is TRUE.
   if(EXE_LINKER_USE_PIE)
     if (NOT WITH_OSD_INSTRUMENT_FUNCTIONS AND NOT HAVE_SEASTAR)
-      set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pie")
+      string(APPEND CMAKE_EXE_LINKER_FLAGS " -pie")
     endif()
   endif()
 elseif(CMAKE_CXX_COMPILER_ID STREQUAL Clang)
-- 
2.47.3