Small Warnings Refactor (#4477)

* Disable all warnings, even in release, on the `src` directory.
Resolve math macro duplication warnings.

* Suppress LUS warnings.

* Modify it to utilize a variable that defaults on but can be specified in command line to disable it.
Prevet total compile option overwrite for LUS.

* Remove unnecessary unset and cache parameters.

* Document warnings flag in BUILDING.md

soh/CMakeLists.txt

@@ -173,6 +173,7 @@ endif()
 
 # src (decomp) {{{
 file(GLOB_RECURSE src__ RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} "src/*.c" "src/*.h")
+set_source_files_properties(${src__} PROPERTIES COMPILE_OPTIONS "${WARNING_OVERRIDE}")
 
 list(APPEND src__ ${CMAKE_CURRENT_SOURCE_DIR}/Resource.rc)
 list(FILTER src__ EXCLUDE REGEX "src/dmadata/*")

soh/include/libc/math.h

@@ -3,9 +3,15 @@
 
 #include <libultraship/libultra.h>
 
+#ifndef M_PI
 #define M_PI 3.14159265358979323846f
+#endif
+#ifndef M_SQRT2
 #define M_SQRT2 1.41421356237309504880f
+#endif
+#ifndef FLT_MAX
 #define FLT_MAX 340282346638528859811704183484516925440.0f
+#endif
 #define SHT_MAX 32767.0f
 #define SHT_MINV (1.0f / SHT_MAX)
 #define DEGTORAD(x) (x * M_PI / 180.0f)

soh/include/macros.h

@@ -32,8 +32,12 @@
 //#define SEGMENTED_TO_VIRTUAL(addr) PHYSICAL_TO_VIRTUAL(gSegments[SEGMENT_NUMBER(addr)] + SEGMENT_OFFSET(addr))
 #define SEGMENTED_TO_VIRTUAL(addr) addr
 
+#ifndef SQ
 #define SQ(x) ((x)*(x))
+#endif
+#ifndef ABS
 #define ABS(x) ((x) >= 0 ? (x) : -(x))
+#endif
 #define DECR(x) ((x) == 0 ? 0 : --(x))
 #define CLAMP(x, min, max) ((x) < (min) ? (min) : (x) > (max) ? (max) : (x))
 #define CLAMP_MAX(x, max) ((x) > (max) ? (max) : (x))