reduce memory allocations to zero

[platform/upstream/glog.git] / CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b2fa9e4..89e8f81 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,6 +27,8 @@ set (CPACK_PACKAGE_VERSION_PATCH ${GLOG_PATCH_VERSION})
 set (CPACK_PACKAGE_VERSION ${GLOG_VERSION})
 
 option (WITH_GFLAGS "Use gflags" ON)
+option (WITH_THREADS "Enable multithreading support" ON)
+option (WITH_TLS "Enable Thread Local Storage (TLS) support" ON)
 
 list (APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 
@@ -55,7 +57,9 @@ if (WITH_GFLAGS)
   endif (gflags_FOUND)
 endif (WITH_GFLAGS)
 
-find_package (Threads)
+if (WITH_THREADS)
+  find_package (Threads)
+endif (WITH_THREADS)
 
 check_include_file (dlfcn.h HAVE_DLFCN_H)
 check_include_file (execinfo.h HAVE_EXECINFO_H)
@@ -180,6 +184,31 @@ using namespace Outer::Inner;;
 int main() { return i; }
 " HAVE_NAMESPACES)
 
+check_cxx_source_compiles ("
+__declspec(thread) int tls;
+int main() { }
+" HAVE_MSVC_TLS)
+
+check_cxx_source_compiles ("
+thread_local int tls;
+int main() { }
+" HAVE_CXX11_TLS)
+
+check_cxx_source_compiles ("
+__attribute__((thread)) int tls;
+int main() { }
+" HAVE_CYGWIN_TLS)
+
+if (WITH_TLS)
+  if (HAVE_CYGWIN_TLS)
+    set (GLOG_THREAD_LOCAL_STORAGE "__attribute__((thread))")
+  elseif (HAVE_MSVC_TLS)
+    set (GLOG_THREAD_LOCAL_STORAGE "__declspec(thread)")
+  elseif (HAVE_CXX11_TLS)
+    set (GLOG_THREAD_LOCAL_STORAGE thread_local)
+  endif (HAVE_CYGWIN_TLS)
+endif (WITH_TLS)
+
 set (_PC_FIELDS
   "gregs[REG_PC]"
   "gregs[REG_EIP]"
@@ -310,9 +339,13 @@ endif (HAVE_USING_OPERATOR)
 
 set (SIZEOF_VOID_P ${CMAKE_SIZEOF_VOID_P})
 
-if (Threads_FOUND AND CMAKE_USE_PTHREADS_INIT)
-  set (HAVE_PTHREAD 1)
-endif (Threads_FOUND AND CMAKE_USE_PTHREADS_INIT)
+if (WITH_THREADS AND Threads_FOUND)
+  if (CMAKE_USE_PTHREADS_INIT)
+    set (HAVE_PTHREAD 1)
+  endif (CMAKE_USE_PTHREADS_INIT)
+else (WITH_THREADS AND Threads_FOUND)
+  set (NO_THREADS 1)
+endif (WITH_THREADS AND Threads_FOUND)
 
 set (TEST_SRC_DIR \"${CMAKE_CURRENT_SOURCE_DIR}\")
 
@@ -369,6 +402,10 @@ if (UNWIND_LIBRARY)
   target_link_libraries (glog PUBLIC ${UNWIND_LIBRARY})
 endif (UNWIND_LIBRARY)
 
+if (HAVE_PTHREAD)
+  target_link_libraries (glog PUBLIC ${CMAKE_THREAD_LIBS_INIT})
+endif (HAVE_PTHREAD)
+
 if (WIN32 AND HAVE_SNPRINTF)
   set_property (SOURCE src/windows/port.cc APPEND PROPERTY COMPILE_DEFINITIONS
     HAVE_SNPRINTF)
@@ -400,6 +437,7 @@ set_target_properties (glog PROPERTIES PUBLIC_HEADER "${GLOG_PUBLIC_H}")
 target_include_directories (glog BEFORE PUBLIC
   "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>"
   "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>"
+  "$<INSTALL_INTERFACE:include>"
   PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
   PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src)
 
@@ -432,12 +470,6 @@ else (NOT BUILD_SHARED_LIBS)
     "GOOGLE_GLOG_DLL_DECL_FOR_UNITTESTS=${_IMPORT}")
 endif (NOT BUILD_SHARED_LIBS)
 
-if (HAVE_PTHREAD)
-  target_link_libraries (glog PUBLIC ${CMAKE_THREAD_LIBS_INIT})
-else (HAVE_PTHREAD)
-  target_compile_definitions (glog PUBLIC NO_THREADS)
-endif (HAVE_PTHREAD)
-
 if (HAVE_EXECINFO_H)
   set (HAVE_STACKTRACE 1)
 endif (HAVE_EXECINFO_H)