32: Set mavx and mavx2 based on CMake checks

src/CMakeLists.txt

@@ -2,6 +2,16 @@ include(FetchContent)
 include(FindAVX)
 add_library(trigdx reference.cpp lookup.cpp)
 
+if(HAVE_AVX)
+    target_compile_definitions(trigdx PUBLIC HAVE_AVX)
+    target_compile_options(trigdx PUBLIC -mavx)
+endif()
+
+if(HAVE_AVX2)
+    target_compile_definitions(trigdx PUBLIC HAVE_AVX2)
+    target_compile_options(trigdx PUBLIC -mavx2)
+endif()
+
 target_include_directories(trigdx PUBLIC ${PROJECT_SOURCE_DIR}/include)
 
 if(HAVE_AVX)

src/lookup_avx.cpp

@@ -6,6 +6,14 @@
 
 #include "trigdx/lookup_avx.hpp"
 
+#if defined(HAVE_AVX) && !defined(__AVX__)
+static_assert(HAVE_AVX == 0, "__AVX__ should be defined when HAVE_AVX is defined, check compile flags (-mavx)");
+#endif
+
+#if defined(HAVE_AVX2) && !defined(__AVX2__)
+static_assert(HAVE_AVX2 == 0, "__AVX__2 should be defined when HAVE_AVX2 is defined, check compile flags (-mavx2)");
+#endif
+
 template <std::size_t NR_SAMPLES> struct LookupAVXBackend<NR_SAMPLES>::Impl {
   std::vector<float> lookup;
   static constexpr std::size_t MASK = NR_SAMPLES - 1;