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

5 files changed, 27 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 606abeba7..2bdaf1de9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,6 +9,18 @@ project(Ship VERSION 8.0.6 LANGUAGES C CXX)
 include(CMake/soh-cvars.cmake)
 include(CMake/lus-cvars.cmake)
 
+option(SUPPRESS_WARNINGS "Suppress warnings in LUS and src (decomp)" ON)
+if(SUPPRESS_WARNINGS)
+    MESSAGE("Suppressing warnings in LUS and src")
+    if(MSVC)
+        set(WARNING_OVERRIDE /w)
+    else()
+        set(WARNING_OVERRIDE -w)
+    endif()
+else()
+    MESSAGE("Skipping warning suppression")
+endif()
+
 set(NATO_PHONETIC_ALPHABET
   "Alfa" "Bravo" "Charlie" "Delta" "Echo" "Foxtrot" "Golf" "Hotel"
   "India" "Juliett" "Kilo" "Lima" "Mike" "November" "Oscar" "Papa"
@@ -148,6 +160,7 @@ add_compile_definitions(CONTROLLERBUTTONS_T=uint32_t)
 # Sub-projects
 ################################################################################
 add_subdirectory(libultraship ${CMAKE_BINARY_DIR}/libultraship)
+target_compile_options(libultraship PRIVATE "${WARNING_OVERRIDE}")
 add_subdirectory(ZAPDTR/ZAPD ${CMAKE_BINARY_DIR}/ZAPD)
 add_subdirectory(OTRExporter)
 add_subdirectory(soh)
diff --git a/docs/BUILDING.md b/docs/BUILDING.md
index a95dbc31e..74ab53378 100644
--- a/docs/BUILDING.md
+++ b/docs/BUILDING.md
@@ -31,6 +31,7 @@ cd Shipwright
 
 # Setup cmake project
 # Add `-DCMAKE_BUILD_TYPE:STRING=Release` if you're packaging
+# Add `-DSUPPRESS_WARNINGS=0` to prevent suppression of warnings from LUS and decomp (src) files. set to 1 to re-enable suppression
 & 'C:\Program Files\CMake\bin\cmake' -S . -B "build/x64" -G "Visual Studio 17 2022" -T v143 -A x64
 
 # Generate soh.otr
@@ -133,6 +134,7 @@ git submodule update --init
 
 # Generate Ninja project
 # Add `-DCMAKE_BUILD_TYPE:STRING=Release` if you're packaging
+# Add `-DSUPPRESS_WARNINGS=0` to prevent suppression of warnings from LUS and decomp (src) files. set to 1 to re-enable suppression
 # Add `-DPython3_EXECUTABLE=$(which python3)` if you are using non-standard Python installations such as PyEnv
 cmake -H. -Bbuild-cmake -GNinja
 
@@ -187,6 +189,7 @@ git submodule update --init
 
 # Generate Ninja project
 # Add `-DCMAKE_BUILD_TYPE:STRING=Release` if you're packaging
+# Add `-DSUPPRESS_WARNINGS=0` to prevent suppression of warnings from LUS and decomp (src) files. set to 1 to re-enable suppression
 cmake -H. -Bbuild-cmake -GNinja
 
 # Generate soh.otr
diff --git a/soh/CMakeLists.txt b/soh/CMakeLists.txt
index 784f3cc81..935f32ea1 100644
--- a/soh/CMakeLists.txt
+++ b/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/*")
diff --git a/soh/include/libc/math.h b/soh/include/libc/math.h
index cad323823..473ef112b 100644
--- a/soh/include/libc/math.h
+++ b/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)
diff --git a/soh/include/macros.h b/soh/include/macros.h
index e5c03ceca..9c7c43d80 100644
--- a/soh/include/macros.h
+++ b/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))