diff --git a/Configure.cmake b/Configure.cmake
index 24348298b..6d8c70eff 100644
--- a/Configure.cmake
+++ b/Configure.cmake
@@ -177,7 +177,7 @@ endif()
 
 # TARGET PROCESSOR DETECTION
 set(SLEEF_TARGET_PROCESSOR "${CMAKE_SYSTEM_PROCESSOR}")
-if(CMAKE_SYSTEM_NAME STREQUAL "Darwin" AND CMAKE_OSX_ARCHITECTURES MATCHES "^(x86_64|arm64)$")
+if(CMAKE_SYSTEM_NAME MATCHES "^(Darwin|iOS)$" AND CMAKE_OSX_ARCHITECTURES MATCHES "^(x86_64|arm64)$")
   set(SLEEF_TARGET_PROCESSOR "${CMAKE_OSX_ARCHITECTURES}")
 endif()
 
@@ -189,11 +189,17 @@ endif()
 if(SLEEF_TARGET_PROCESSOR MATCHES "(x86|AMD64|amd64|^i.86$)")
   set(SLEEF_ARCH_X86 ON CACHE INTERNAL "True for x86 architecture.")
 
-  set(CLANG_FLAGS_ENABLE_PURECFMA_SCALAR "-mavx2;-mfma")
-elseif(SLEEF_TARGET_PROCESSOR MATCHES "aarch64|arm64")
+  if(NOT CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
+    set(CLANG_FLAGS_ENABLE_PURECFMA_SCALAR "-mavx2;-mfma")
+  else()
+    set(CLANG_FLAGS_ENABLE_PURECFMA_SCALAR "-DFP_FAST_FMA;-DFP_FAST_FMAF")
+  endif()
+elseif(SLEEF_TARGET_PROCESSOR MATCHES "aarch64|arm64|ARM64")
   set(SLEEF_ARCH_AARCH64 ON CACHE INTERNAL "True for Aarch64 architecture.")
   # Aarch64 requires support for advsimdfma4
-  set(COMPILER_SUPPORTS_ADVSIMD 1)
+  if(NOT MSVC)
+    set(COMPILER_SUPPORTS_ADVSIMD 1)
+  endif()
 
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc)64" OR CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc)")
   set(SLEEF_ARCH_PPC64 ON CACHE INTERNAL "True for PPC64 architecture.")
@@ -251,7 +257,7 @@ if(CMAKE_C_COMPILER_ID MATCHES "(GNU|Clang)")
   set(FLAGS_FASTMATH "-ffast-math")
   set(FLAGS_NOSTRICTALIASING "-fno-strict-aliasing")
 
-  if (SLEEF_ARCH_X86 AND SLEEF_ARCH_32BIT)
+  if (SLEEF_ARCH_X86 AND SLEEF_ARCH_32BIT AND NOT CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
     string(CONCAT FLAGS_STRICTMATH ${FLAGS_STRICTMATH} " -msse2 -mfpmath=sse")
     string(CONCAT FLAGS_FASTMATH ${FLAGS_FASTMATH} " -msse2 -mfpmath=sse")
   endif()
@@ -488,7 +494,7 @@ endif()
 
 # Darwin does not support SVE yet (see issue #474),
 # therefore we disable SVE on Darwin systems.
-if(SLEEF_ARCH_AARCH64 AND SLEEF_ENABLE_SVE AND NOT CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+if(SLEEF_ARCH_AARCH64 AND SLEEF_ENABLE_SVE AND NOT CMAKE_SYSTEM_NAME MATCHES "^(Darwin|iOS)$")
   string (REPLACE ";" " " CMAKE_REQUIRED_FLAGS "${FLAGS_ENABLE_SVE}")
   CHECK_C_SOURCE_COMPILES("
   #include <arm_sve.h>
@@ -756,7 +762,7 @@ if (NOT BUILD_SHARED_LIBS)
   set(SLEEF_STATIC_LIBS 1)
 endif()
 
-if (COMPILER_SUPPORTS_WEAK_ALIASES)
+if(COMPILER_SUPPORTS_WEAK_ALIASES AND NOT (WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "GNU"))
   set(COMMON_TARGET_DEFINITIONS ${COMMON_TARGET_DEFINITIONS} ENABLE_ALIAS=1)
 endif()
 
diff --git a/src/arch/helperadvsimd.h b/src/arch/helperadvsimd.h
index 473a7583c..3529ce67f 100644
--- a/src/arch/helperadvsimd.h
+++ b/src/arch/helperadvsimd.h
@@ -5,7 +5,7 @@
 /*          http://www.boost.org/LICENSE_1_0.txt)                    */
 /*********************************************************************/
 
-#if !defined(__ARM_NEON) && !defined(SLEEF_GENHEADER)
+#if !defined(__ARM_NEON) && !defined(_M_ARM64) && !defined(SLEEF_GENHEADER)
 #error Please specify advsimd flags.
 #endif
 
diff --git a/src/common/common.c b/src/common/common.c
index 7c1c65e81..e209089bd 100644
--- a/src/common/common.c
+++ b/src/common/common.c
@@ -33,7 +33,7 @@ EXPORT void *Sleef_malloc(size_t z) { void *ptr = NULL; posix_memalign(&ptr, 409
 EXPORT void Sleef_free(void *ptr) { free(ptr); }
 #endif // #if defined(__MINGW32__) || defined(__MINGW64__) || defined(_MSC_VER)
 
-#ifdef _MSC_VER
+#if defined _MSC_VER && (defined(_M_IX86) || defined(_M_X64))
 #include <intrin.h>
 EXPORT void Sleef_x86CpuID(int32_t out[4], uint32_t eax, uint32_t ecx) {
   __cpuidex(out, eax, ecx);