Modularize CMake build configuration

Build type no longer defaults to Release (!)
have separate options for extra warning flags and sanitizers

toss DEVELOP macro

Fix sanitizers with CMake while I'm at it :|

.github/workflows/testing.yml

@@ -14,11 +14,11 @@ jobs:
           - os: ubuntu-18.04
             cc: gcc
             target: develop
-            cmakevars: -DDEVELOP=ON
+            cmakevars: -DSANITIZERS=ON -DMORE_WARNINGS=ON -DCMAKE_BUILD_TYPE=Debug
           - os: ubuntu-20.04
             cc: gcc
             target: develop
-            cmakevars: -DDEVELOP=ON
+            cmakevars: -DSANITIZERS=ON -DMORE_WARNINGS=ON -DCMAKE_BUILD_TYPE=Debug
       fail-fast: false
     runs-on: ${{ matrix.os }}
     steps:

CMakeLists.txt

@@ -12,18 +12,6 @@ cmake_policy(VERSION 3.0)
 project(rgbds
         LANGUAGES C)
 
-option(DEVELOP "build in development mode" OFF)
-
-set(DEFAULT_BUILD_TYPE "Release")
-set(DEVELOP_BUILD_TYPE "Debug")
-if(NOT CMAKE_BUILD_TYPE)
-  if(DEVELOP)
-    set(CMAKE_BUILD_TYPE "${DEVELOP_BUILD_TYPE}")
-  else()
-    set(CMAKE_BUILD_TYPE "${DEFAULT_BUILD_TYPE}")
-  endif()
-endif()
-
 # get real path of source and binary directories
 get_filename_component(srcdir "${CMAKE_SOURCE_DIR}" REALPATH)
 get_filename_component(bindir "${CMAKE_BINARY_DIR}" REALPATH)
@@ -37,16 +25,26 @@ endif()
 
 include_directories("${PROJECT_SOURCE_DIR}/include")
 
-if(DEVELOP)
+option(SANITIZERS "Build with sanitizers enabled" OFF)
-  add_definitions(-DDEVELOP)
+option(MORE_WARNINGS "Turn on more warnings" OFF)
-endif()
 
 if(MSVC)
   add_compile_options(/W1 /MP)
   add_definitions(/D_CRT_SECURE_NO_WARNINGS)
 else()
-  if(DEVELOP)
+  add_compile_options(-Wall -pedantic)
-    add_compile_options(-Werror -Wall -Wextra -pedantic -Wno-type-limits
+  if(SANITIZERS)
+    set(SAN_FLAGS -fsanitize=shift -fsanitize=integer-divide-by-zero
+                  -fsanitize=unreachable -fsanitize=vla-bound
+                  -fsanitize=signed-integer-overflow -fsanitize=bounds
+                  -fsanitize=object-size -fsanitize=bool -fsanitize=enum
+                  -fsanitize=alignment -fsanitize=null)
+    add_compile_options(${SAN_FLAGS})
+    link_libraries(${SAN_FLAGS})
+  endif()
+
+  if(MORE_WARNINGS)
+    add_compile_options(-Werror -Wextra -Wno-type-limits
                         -Wno-sign-compare -Wformat -Wformat-security -Wformat-overflow=2
                         -Wformat-truncation=1 -Wformat-y2k -Wswitch-enum -Wunused
                         -Wuninitialized -Wunknown-pragmas -Wstrict-overflow=5
@@ -54,14 +52,6 @@ else()
                         -Wfloat-equal -Wshadow -Wcast-qual -Wcast-align -Wlogical-op
                         -Wnested-externs -Wno-aggressive-loop-optimizations -Winline
                         -Wundef -Wstrict-prototypes -Wold-style-definition)
-
-     link_libraries(-fsanitize=shift -fsanitize=integer-divide-by-zero
-                    -fsanitize=unreachable -fsanitize=vla-bound
-                    -fsanitize=signed-integer-overflow -fsanitize=bounds
-                    -fsanitize=object-size -fsanitize=bool -fsanitize=enum
-                    -fsanitize=alignment -fsanitize=null)
-  else()
-    add_compile_options(-Wall -pedantic)
   endif()
 endif()
 

Makefile

@@ -198,7 +198,7 @@ develop:
 		-fsanitize=unreachable -fsanitize=vla-bound \
 		-fsanitize=signed-integer-overflow -fsanitize=bounds \
 		-fsanitize=object-size -fsanitize=bool -fsanitize=enum \
-		-fsanitize=alignment -fsanitize=null -DDEVELOP" CFLAGS="-ggdb3 -O0"
+		-fsanitize=alignment -fsanitize=null" CFLAGS="-ggdb3 -O0"
 
 # Targets for the project maintainer to easily create Windows exes.
 # This is not for Windows users!

include/helpers.h

@@ -1,7 +1,7 @@
 /*
  * This file is part of RGBDS.
  *
- * Copyright (c) 2014-2018, RGBDS contributors.
+ * Copyright (c) 2014-2020, RGBDS contributors.
  *
  * SPDX-License-Identifier: MIT
  */
@@ -23,10 +23,6 @@
 	#define trap_
 #endif
 
-#ifndef DEVELOP
-	#define DEVELOP 0
-#endif
-
 /* Macros for stringification */
 #define STR(x) #x
 #define EXPAND_AND_STR(x) STR(x)