Bump cmake version requirement in BUILDING doc (#550)

#538 bumped minimal CMake version to 3.0 at least. #549 pointed out that some documentation does not reflect this change. Modify existing documentation to cater for the CMake version bump. Also call out CMake executable name differences
aws · Jul 12, 2022 · 7a22b71 · 7a22b71
1 parent 33dd38e
commit 7a22b71
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/BUILDING.md b/BUILDING.md
@@ -10,7 +10,7 @@ Unless otherwise noted, build tools must at most five years old, matching
 [Abseil guidelines](https://abseil.io/about/compatibility). If in doubt, use the
 most recent stable version of each tool.
 
-  * [CMake](https://cmake.org/download/) 2.8.12 or later is required.
+  * [CMake](https://cmake.org/download/) 3.0 or later is required.
 
   * A recent version of Perl is required. On Windows,
     [Active State Perl](http://www.activestate.com/activeperl/) has been
@@ -49,6 +49,11 @@ most recent stable version of each tool.
 
 ## Building
 
+We use CMake to manage the build process. Note that the executable name for
+CMake version 3.0 and later differs depending on the OS. For example, on Amazon
+Linux 2 the executable name is `cmake3` while on Ubuntu 20.04 the executable
+name is `cmake`. Modify command snippets below accordingly.
+
 Using Ninja (note the 'N' is capitalized in the cmake invocation):
 
     mkdir build