diff --git a/CMakeLists.txt b/CMakeLists.txt
index a261556..553847d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -138,14 +138,17 @@ if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
 	set(CMAKE_C_FLAGS_DEBUG "-g -D_DEBUG -O0")
 	set(CMAKE_C_FLAGS_DEBUGALL "-g -ggdb -D_DEBUG")
 	set(CMAKE_C_FLAGS_PROFILE "-g -ggdb -D_DEBUG -O1 -fno-omit-frame-pointer")
-	set(CMAKE_C_FLAGS_RELEASE "-O2 -fno-unsafe-math-optimizations -fno-math-errno -fno-trapping-math -fomit-frame-pointer")
-	set(CMAKE_C_FLAGS_RELWITHDEBINFO "-O2 -g -ggdb -fno-unsafe-math-optimizations -fno-math-errno -fno-trapping-math -fno-omit-frame-pointer")
-	set(CMAKE_C_FLAGS_MINSIZEREL "-Os -fno-unsafe-math-optimizations -fno-math-errno -fno-trapping-math -fomit-frame-pointer")
+	set(CMAKE_C_FLAGS_RELEASE "-O2 -fno-math-errno -fno-trapping-math -fomit-frame-pointer")
+	set(CMAKE_C_FLAGS_RELWITHDEBINFO "-O2 -g -ggdb -fno-math-errno -fno-trapping-math -fno-omit-frame-pointer")
+	set(CMAKE_C_FLAGS_MINSIZEREL "-Os -fno-math-errno -fno-trapping-math -fomit-frame-pointer")
 
 	set(CMAKE_CXX_FLAGS_DEBUGALL ${CMAKE_C_FLAGS_DEBUGALL})
 	set(CMAKE_CXX_FLAGS_PROFILE ${CMAKE_C_FLAGS_PROFILE})
 
 	add_compile_options(-fno-strict-aliasing)
+	# dear idiot compilers, don't fuck up math code with useless FMA "optimizations"
+	# (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100839)
+	add_compile_options(-ffp-contract=off)
 
 	if(NOT AROS)
 		CHECK_CXX_COMPILER_FLAG("-fvisibility=hidden" cxx_has_fvisibility)
@@ -198,8 +201,8 @@ if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
 		elseif(cpu STREQUAL "ppc")
 			CHECK_CXX_COMPILER_FLAG("-arch ppc" cxx_has_arch_ppc)
 			if(cxx_has_arch_ppc)
-				add_compile_options(-arch ppc)
-				set(ldflags "${ldflags} -arch ppc")
+				add_compile_options(-arch ppc -mone-byte-bool)
+				set(ldflags "${ldflags} -arch ppc -mone-byte-bool")
 			endif()
 
 			add_compile_options(-mmacosx-version-min=10.4)