message: Updated README with new build instructions.
diff: @@ -41,9 +41,10 @@ source repository. For example,
  raja-perfsuite
  ```
  -The '--recursive' argument is used to also clone the Git submodules on
  -which the Performance Suite depends. Note that if you switch to a branch,
  -other than the default branch, you will have to update the submodules; e.g.,
  +The Performance Suite has [RAJA] and the CMake-based [BLT] build system
  +as Git submodules. The '--recursive' argument will clone theses submodules int
  +the Performance Suite source code. Note that if you switch to a different
  +branch, you will have to update the submodules; e.g.,
  ```
  > cd raja-perfsuite
  @@ -52,29 +53,37 @@ other than the default branch, you will have to update the submodules; e.g.,
  > git submodule update
  ```
  -Finally, use [CMake] to build the code. The simplest way to build the code is
  -to create a build directory in the top-level RAJA Performance Suite directory
  -(in-source builds are not allowed!) and run CMake from there; i.e., :
  +RAJA and the Performance Suite are built together using the same CMake
  +configuration. For convenience, we include some scripts in the 'scripts'
  +directory some associated configuration files in the 'host-configs'
  +that illustrate how to build the code on various platforms at LLNL. Each
  +build script will create a descriptively-named build space directory in
  +the top-level erformance Suite directory, and run CMake with a configuration
  +appropriate for the platform and compilers used. After CMake completes,
  +enter the build directory and type 'make' (or 'make -j' for parallel) to
  +build the code.
  +
  +You can also create your own build directory and run CMake with your own
  +arguments from there; e.g., :
  ```
  > mkdir my-build
  > cd my-build
  > cmake <cmake args> ../
  -> make
  +> make -j
  ```
  -RAJA and the Performance Suite are built together using the same CMake
  -configuration. For convenience, we include some scripts in the 'scripts'
  -directory some associated configuration files in the 'host-configs'
  -that illustrate how to build the code on various platforms.
  +The provided configurations will build RAJA unit tests by default. After the
  +code builds, you can type 'make test' to verify that everything is working
  +properly.
  * * *
  # Running the suite
  -The suite is run by invoking the executable in the top-level performance
  -suite 'src' directory in the build space. For example, giving it no options:
  +The suite is run by invoking the executable in the 'bin' directory in the
  +build space. For example, giving it no options:
  ```
  -> ./extra/performance/src/raja-perf.exe
  +> ./bin/raja-perf.exe
  ```
  will run the entire suite (all kernels and variants) in their default
  configurations.
  @@ -91,11 +100,11 @@ Note: most options appear in a long or short form for ease of use.
  To see available options along with a brief description of each, pass the
  '--help' or '-h' option:
  ```
  -> ./extra/performance/src/raja-perf.exe --help
  +> ./bin/raja-perf.exe --help
  ```
  or
  ```
  -> ./extra/performance/src/raja-perf.exe -h
  +> ./bin/raja-perf.exe -h
  ```
  Lastly, the program will emit a summary of provided input if it is given
  @@ -434,4 +443,4 @@ in earlier sections for adding a new kernel above.
  * * *
  [RAJA]: https://github/LLNL/RAJA
  -[CMake]: http://www.cmake.org
  +[BLT]: https://github.com/LLNL/blt
  