Upgraded cppsm (#29)

polytypic · web-flow · commit e2aa8ef6a7fa · 2019-09-17T23:27:56.000+03:00
New boilerplate make root CMakeLists.txt act like a pure library by default.
diff --git a/.cppsm b/.cppsm
@@ -1 +1 @@
-Subproject commit 271bc41006539babeb8dc58fd33366ea5bee6e0c
+Subproject commit cc87d2eb1640ac1793dd450dc84e86ce714e77d5
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -1,3 +1,3 @@
-cmake_minimum_required(VERSION 3.9)
+cmake_minimum_required(VERSION 3.10)
 project(trade.cpp)
 include(.cppsm/c++17.cmake)
diff --git a/README.md b/README.md
@@ -68,10 +68,28 @@ cd trade.cpp
 git submodule update --init
 mkdir .build
 cd .build
-cmake ..
+cmake -DCPPSM=1 ..
 make all test
 ```
 
+Above the `-DCPPSM=1` option specifies that internal targets should be included,
+which is what you want when you are developing Trade.C++ itself.
+
+If you are not using `cppsm` in your project and just want to use Trade.C++, you
+should be able to just
+
+```cmake
+add_subdirectory(path-to/trade.cpp)
+```
+
+and then
+
+```cmake
+target_link_libraries(your-target PRIVATE trade_v1)
+```
+
+in your CMake files.
+
 ### <a id="basics"></a> [≡](#contents) [Basics](#basics)
 
 Using this library one stores values in `atom`s that can then be accessed from
