Updated the README with the previous commit and updated CMakeLists.txt to address issues raised by the other PR.

Update #261

CMakeLists.txt

@@ -27,6 +27,7 @@ set(MSVC_INCREMENTAL_DEFAULT ON)
 
 # default to debug builds
 # do this before project() just to be safe
+# either DEBUG or Debug will work; we use DEBUG as that's what cmake does internally (https://cmake.org/pipermail/cmake/2013-June/055177.html)
 if(NOT CMAKE_BUILD_TYPE)
 	set(CMAKE_BUILD_TYPE DEBUG CACHE STRING "" FORCE)
 endif()
@@ -75,6 +76,7 @@ if(MSVC)
 	# TODO /sdl turns C4996 into an ERROR
 	# don't use /analyze; that requires us to write annotations everywhere
 	# TODO undecided flags from qo?
+	# the RTC flags are only supplied in debug builds because they are only supposed to be used by debug builds (see "This is because run-time error checks are not valid in a release (optimized) build." in https://docs.microsoft.com/cpp/build/reference/rtc-run-time-error-checks)
 	# /RTCc is not supplied because it's discouraged as of VS2015; see https://www.reddit.com/r/cpp/comments/46mhne/rtcc_rejects_conformant_code_with_visual_c_2015/d06auq5
 	# /EHsc is to shut the compiler up in some cases
 	# TODO make /EHsc C++-only

README.md

@@ -58,6 +58,9 @@ This README is being written.<br>
 
 *Note that today's entry (Eastern Time) may be updated later today.*
 
+* **13 May 2018**
+	* Release builds on Windows with MSVC should be fixed now; thanks @l0calh05t, @slahn, @mischnic, and @zentner-kyle.
+
 * **12 May 2018**
 	* GTK+ and OS X now have a cleaner build process for static libraries which no longer has intermediate files and differing configurations. As a result, certain issues should no longer be present. New naming rules for internal symbols of libui have also started being drafted; runtime symbols and edge cases still need to be handled (and the rules applied to Windows) before this can become a regular thing.