Better internal structure

SUMMARY.md

@@ -1,18 +1,19 @@
 # Summary
 
 * [An Introduction to Modern CMake](README.md)
-    * [Installing CMake](chapters/installing.md)
-    * [Running CMake](chapters/running.md)
-    * [What's new in CMake](chapters/newcmake.md)
+    * [Installing CMake](chapters/intro/installing.md)
+    * [Running CMake](chapters/intro/running.md)
+    * [What's new in CMake](chapters/intro/newcmake.md)
 * [Introduction to the Basics](chapters/basics.md)
     * [Variables and the Cache](chapters/basics/variables.md)
-    * [How to Structure Your Project](chapters/structure.md)
-    * [Running Other Programs (X)](chapters/programs.md)
+    * [How to Structure Your Project](chapters/basics/structure.md)
+    * [Running Other Programs (X)](chapters/basics/programs.md)
 * [Adding Features](chapters/features.md)
-    * [C++11 and Beyond](chapters/cpp11.md)
-    * [Tidy and Format (X)](chapters/tidy.md)
-    * [IDEs (X)](chapters/IDEs.md)
-    * [Debugging (X)](chapters/debug.md)
+    * [C++11 and Beyond](chapters/features/cpp11.md)
+    * [Small but common needs](chapters/features/small.md)
+    * [Tidy and Format (X)](chapters/features/tidy.md)
+    * [IDEs (X)](chapters/features/IDEs.md)
+    * [Debugging (X)](chapters/features/debug.md)
 * [Including Projects](chapters/projects.md)
     * [Submodule](chapters/projects/submodule.md) 
     * [DownloadProject](chapters/projects/download.md) 
@@ -21,13 +22,12 @@
     * [GoogleTest](chapters/testing/googletest.md)
     * [Catch](chapters/testing/catch.md)
 * [Exporting and Installing](chapters/exporting.md)
-* [Built-in package discovery](chapters/builtin.md)
-    * [CUDA](specifics/CUDA.md)
-    * [OpenMP](specifics/OpenMP.md)
-    * [Boost (X)](specifics/Boost.md)
-    * [MPI](specifics/MPI.md)
-* [Other common packages](chapters/external.md)
-    * [ROOT](specifics/ROOT.md)
+* [Looking for libraries](chapters/packages.md)
+    * [CUDA](chapters/packages/CUDA.md)
+    * [OpenMP](chapters/packages/OpenMP.md)
+    * [Boost (X)](chapters/packages/Boost.md)
+    * [MPI](chapters/packages/MPI.md)
+    * [ROOT](chapters/packages/ROOT.md)
         * [Simple Example](examples/root-simple/README.md)
         * [Simple Example CMake 3.11+](examples/root-simple-3.11/README.md)
         * [Dictionary Example](examples/root-dict/README.md)

chapters/external.md

@@ -1,3 +0,0 @@
-# Finding Package
-
-There are two ways to find packages in CMake.

chapters/features.md

@@ -1,50 +1,3 @@
-# Adding Features
+# Adding features
 
-There are lots of compiler and linker settings. When you need to add something special, you could check first to see if CMake supports it; if it does, you can avoid explicitly tying yourself to a compiler version. And, better yet, you explain what you mean in your CMakeLists, rather than spewing flags.
-
-The first and most common feature was C++ standards support, which got it's own chapter.
-
-## Platform independent code
-
-[This](https://cmake.org/cmake/help/v3.9/variable/CMAKE_POSITION_INDEPENDENT_CODE.html) is best known as the `-fPIC` flag. Much of the time, you don't need to do anything. CMake will include the flag for `SHARED` or `MODULE` libraries. If you do explicitly need it:
-
-```cmake
-set(CMAKE_POSITION_INDEPENDENT_CODE ON)
-```
-
-will do it globally, or:
-
-```cmake
-set_target_properties(lib1 PROPERTIES POSITION_INDEPENDENT_CODE ON)
-```
-
-to explicitly turn it `ON` (or `OFF`) for a target.
-
-## Little libraries
-
-If you need to link to the `dl` library, with `-ldl` on Linux, just use the built-in CMake variable [`${CMAKE_DL_LIBS}`](https://cmake.org/cmake/help/v3.9/variable/CMAKE_DL_LIBS.html) in a `target_link_libraries` command. No module or `find_package` needed. (This adds whatever is needed to get `dlopen` and `dlclose`)
-
-Unfortunately, the math library is not so lucky. If you need to explicitly link to it, you can always do `target_link_libraries(MyTarget PUBLIC m)`, but it might be better to use CMake's generic [`find_library`](https://cmake.org/cmake/help/v3.9/command/find_library.html):
-
-```cmake
-find_library(MATH_LIBRARY m)
-if(MATH_LIBRARY)
-    target_link_libraries(MyTarget PUBLIC ${MATH_LIBRARY})
-endif()
-```
-
-You can pretty easily find `Find*.cmake`'s for this and other libraries that you need with a quick search; most major packages have a helper library of CMake modules. See the chapter on existing package inclusion for more.
-
-
-
-## Interprocedural optimization
-
-[This](https://cmake.org/cmake/help/v3.9/variable/CMAKE_INTERPROCEDURAL_OPTIMIZATION.html) is available on very recent versions of CMake. You can turn this on with `CMAKE_INTERPROCEDURAL_OPTIMIZATION` (CMake 3.9 only) or the `INTERPROCEDURAL_OPTIMIZATION` property on targets. Support for GCC and Clang was added in CMake 3.8. In `cmake_minimum_required(VERSION 3.9)`, setting this to `ON` on a target is an error if the compiler doesn't support it. You can use [`check_ipo_supported()`](https://cmake.org/cmake/help/v3.9/module/CheckIPOSupported.html), from the built-in `CheckIPOSupported` module, to see if support is available before hand. An example of 3.9 style usage:
-
-```cmake
-include(CheckIPOSupported)
-check_ipo_supported(RESULT result)
-if(result)
-  set_target_properties(foo PROPERTIES INTERPROCEDURAL_OPTIMIZATION TRUE)
-endif()
-```
+This section covers adding common features to your CMake project. You'll learn how to add a variety of options commonly needed in C++ projects, like C++11 support, as well as how to support IDEs and more.

chapters/features/small.md

@@ -0,0 +1,50 @@
+# Adding Features
+
+There are lots of compiler and linker settings. When you need to add something special, you could check first to see if CMake supports it; if it does, you can avoid explicitly tying yourself to a compiler version. And, better yet, you explain what you mean in your CMakeLists, rather than spewing flags.
+
+The first and most common feature was C++ standards support, which got it's own chapter.
+
+## Platform independent code
+
+[This](https://cmake.org/cmake/help/v3.9/variable/CMAKE_POSITION_INDEPENDENT_CODE.html) is best known as the `-fPIC` flag. Much of the time, you don't need to do anything. CMake will include the flag for `SHARED` or `MODULE` libraries. If you do explicitly need it:
+
+```cmake
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+```
+
+will do it globally, or:
+
+```cmake
+set_target_properties(lib1 PROPERTIES POSITION_INDEPENDENT_CODE ON)
+```
+
+to explicitly turn it `ON` (or `OFF`) for a target.
+
+## Little libraries
+
+If you need to link to the `dl` library, with `-ldl` on Linux, just use the built-in CMake variable [`${CMAKE_DL_LIBS}`](https://cmake.org/cmake/help/v3.9/variable/CMAKE_DL_LIBS.html) in a `target_link_libraries` command. No module or `find_package` needed. (This adds whatever is needed to get `dlopen` and `dlclose`)
+
+Unfortunately, the math library is not so lucky. If you need to explicitly link to it, you can always do `target_link_libraries(MyTarget PUBLIC m)`, but it might be better to use CMake's generic [`find_library`](https://cmake.org/cmake/help/v3.9/command/find_library.html):
+
+```cmake
+find_library(MATH_LIBRARY m)
+if(MATH_LIBRARY)
+    target_link_libraries(MyTarget PUBLIC ${MATH_LIBRARY})
+endif()
+```
+
+You can pretty easily find `Find*.cmake`'s for this and other libraries that you need with a quick search; most major packages have a helper library of CMake modules. See the chapter on existing package inclusion for more.
+
+
+
+## Interprocedural optimization
+
+[This](https://cmake.org/cmake/help/v3.9/variable/CMAKE_INTERPROCEDURAL_OPTIMIZATION.html) is available on very recent versions of CMake. You can turn this on with `CMAKE_INTERPROCEDURAL_OPTIMIZATION` (CMake 3.9 only) or the `INTERPROCEDURAL_OPTIMIZATION` property on targets. Support for GCC and Clang was added in CMake 3.8. In `cmake_minimum_required(VERSION 3.9)`, setting this to `ON` on a target is an error if the compiler doesn't support it. You can use [`check_ipo_supported()`](https://cmake.org/cmake/help/v3.9/module/CheckIPOSupported.html), from the built-in `CheckIPOSupported` module, to see if support is available before hand. An example of 3.9 style usage:
+
+```cmake
+include(CheckIPOSupported)
+check_ipo_supported(RESULT result)
+if(result)
+  set_target_properties(foo PROPERTIES INTERPROCEDURAL_OPTIMIZATION TRUE)
+endif()
+```

chapters/packages/ROOT.md

@@ -7,7 +7,7 @@ ROOT is a C++ Toolkit for High Energy Physics. It is huge. There are really a lo
 
 ROOT supports config file discovery, so you can just do:
 
-[import:'find_package', lang:'cmake'](../examples/root-simple/CMakeLists.txt)
+[import:'find_package', lang:'cmake'](../../examples/root-simple/CMakeLists.txt)
 
 to attempt to find ROOT. If you don't have your paths set up, you can pass `-DROOT_DIR=$ROOTSYS/cmake` to find ROOT. (But, really, you should source `thisroot.sh`)
 
@@ -19,18 +19,18 @@ ROOT provides a utility to set up a ROOT project, which you can activate using `
 
 ROOT does not correctly set up it's imported targets. To fix this error, you'll need something like:
 
-[import:'setup_properties', lang:'cmake'](../examples/root-simple/CMakeLists.txt)
+[import:'setup_properties', lang:'cmake'](../../examples/root-simple/CMakeLists.txt)
 
 In CMake 3.11, you can replace that last function call with:
 
 
-[import:'modern_fix', lang:'cmake'](../examples/root-simple-3.11/CMakeLists.txt)
+[import:'modern_fix', lang:'cmake'](../../examples/root-simple-3.11/CMakeLists.txt)
 
 All the ROOT targets will require `ROOT::Core`, so this will be enough regardless of which ROOT targets you need.
 
 To link, just pick the libraries you want to use:
 
-[import:'add_and_link', lang:'cmake'](../examples/root-simple/CMakeLists.txt)
+[import:'add_and_link', lang:'cmake'](../../examples/root-simple/CMakeLists.txt)
 
 ## Dictionary generation