re-added deleted README.md, cmake tweaks, added .gitignore

.gitignore

@@ -0,0 +1,19 @@
+/.ninja_deps
+/.ninja_log
+/build.ninja
+/rules.ninja
+CMakeCache.txt
+CMakeFiles
+*.cmake
+libtbb.dylib
+libtbb.so
+libtbb_static.a
+libtbbmalloc.dylib
+libtbbmalloc.so
+libtbbmalloc_proxy.dylib
+libtbbmalloc_proxy.so
+libtbbmalloc_proxy_static.a
+libtbbmalloc_static.a
+tbb.def
+tbbmalloc.def
+version_string.ver

CMakeLists.txt

@@ -115,27 +115,23 @@ endif ()
 #   - Added TBB_USE_GLIBCXX_VERSION macro to specify the version of GNU
 #     libstdc++ when it cannot be properly recognized, e.g. when used
 #     with Clang on Linux* OS. Inspired by a contribution from David A.
-if(NOT TBB_USE_GLIBCXX_VERSION AND UNIX AND NOT APPLE)
+if (NOT TBB_USE_GLIBCXX_VERSION AND UNIX AND NOT APPLE)
   if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
     # using Clang
     string(REPLACE "." "0" TBB_USE_GLIBCXX_VERSION ${CMAKE_CXX_COMPILER_VERSION})
-    message(STATUS "TBB_USE_GLIBCXX_VERSION:${TBB_USE_GLIBCXX_VERSION}:")
-
-  elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-    # Do nothing using GCC
-  elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
-    # Do nothing when using Intel C++
-  elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
-    # Do nothgin when using Visual Studio C++
   endif()
 endif()
-if(TBB_USE_GLIBCXX_VERSION)
-   message(STATUS "ADDING: -DTBB_USE_GLIBCXX_VERSION=${TBB_USE_GLIBCXX_VERSION}")
+
+if (TBB_USE_GLIBCXX_VERSION)
    add_definitions(-DTBB_USE_GLIBCXX_VERSION=${TBB_USE_GLIBCXX_VERSION})
 endif()
 
 ##-------
 
+if (CMAKE_COMPILER_IS_GNUCC AND UNIX AND NOT APPLE)
+   add_definitions(-flifetime-dse=1)
+endif()
+
 # Linker export definitions
 if (APPLE)
   set (ARCH_PREFIX "mac")

README.md

@@ -0,0 +1,27 @@
+### Intel(R) Threading Building Blocks
+
+[![Build Status](https://travis-ci.org/wjakob/tbb.svg?branch=master)](https://travis-ci.org/wjakob/tbb)
+[![Build status](https://ci.appveyor.com/api/projects/status/fvepmk5nxekq27r8?svg=true)](https://ci.appveyor.com/project/wjakob/tbb/branch/master)
+
+This is git repository is currently based on TBB 2017 and will be updated from
+time to time to track the most recent release. The only modification is the
+addition of a CMake-based build system.
+
+This is convenient for other projects that use CMake and TBB because TBB can be
+easily incorporated into their build process using git submodules and a simple
+``add_subdirectory`` command.
+
+Currently, the CMake-based build can create shared and static versions of
+`libtbb`, `libtbbmalloc` and `libtbbmalloc_proxy` for the Intel `i386`/`x86_64`
+architectures on Windows (Visual Studio, MinGW), MacOS (clang) and Linux (gcc).
+Other combinations may work but have not been tested.
+
+See index.html for general directions and documentation regarding TBB.
+
+See examples/index.html for runnable examples and directions.
+
+See http://threadingbuildingblocks.org for full documentation
+and software information.
+
+Note: Intel, Thread Building Blocks, and TBB are either registered trademarks or
+trademarks of Intel Corporation in the United States and/or other countries.