diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..26cc2fd
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,61 @@
+cmake_minimum_required(VERSION 2.8.8)
+project(libffi C)
+
+set(SOURCES_LIST
+    src/closures.c
+    src/java_raw_api
+    src/prep_cif.c
+    src/raw_api.c
+    src/tramp.c
+    src/types.c)
+
+if(CMAKE_BUILD_TYPE MATCHES DEBUG)
+    list(APPEND SOURCES_LIST src/debug.c)
+    add_definitions(-DFFI_DEBUG)
+endif()
+
+include(configure_platform.cmake)
+include(configure_options.cmake)
+
+file(COPY ${FFI_CONFIG_FILE} DESTINATION ${CMAKE_BINARY_DIR})
+file(COPY src/${TARGETDIR}/ffitarget.h DESTINATION ${CMAKE_BINARY_DIR}/include)
+
+include_directories(${CMAKE_BINARY_DIR}/include)
+include_directories(${CMAKE_BINARY_DIR})
+include_directories(include)
+
+add_definitions(-DFFI_BUILDING)
+
+add_library(objlib OBJECT ${SOURCES_LIST})
+set_property(TARGET objlib PROPERTY POSITION_INDEPENDENT_CODE 1)
+
+add_library(ffi_static STATIC $<TARGET_OBJECTS:objlib>)
+
+if(MSVC)
+    add_definitions(-DFFI_BUILDING_DLL)
+    set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
+elseif(CMAKE_SYSTEM_NAME MATCHES Darwin)
+    set(CMAKE_MACOSX_RPATH 1)
+endif()
+add_library(ffi_shared SHARED $<TARGET_OBJECTS:objlib> ${OBJECTS_LIST})
+
+set_target_properties(ffi_static PROPERTIES OUTPUT_NAME ffi)
+set_target_properties(ffi_shared PROPERTIES OUTPUT_NAME ffi)
+
+install(TARGETS ffi_static ffi_shared
+    EXPORT ${PROJECT_NAME}Targets
+    RUNTIME DESTINATION bin
+    ARCHIVE DESTINATION lib
+    LIBRARY DESTINATION lib)
+
+install(EXPORT ${PROJECT_NAME}Targets
+    DESTINATION share/${PROJECT_NAME})
+
+install(FILES
+    ${CMAKE_BINARY_DIR}/include/ffi.h
+    ${CMAKE_BINARY_DIR}/include/ffitarget.h
+    DESTINATION include)
+
+install(FILES
+    ${CMAKE_LIBRARY_DIR}/pkgconfig/libffi.pc
+    DESTINATION lib/pkgconfig)
diff --git a/configure_options.cmake b/configure_options.cmake
new file mode 100644
index 0000000..849231c
--- /dev/null
+++ b/configure_options.cmake
@@ -0,0 +1,341 @@
+include(CheckCSourceCompiles)
+include(CheckCSourceRuns)
+include(CheckFunctionExists)
+include(CheckIncludeFile)
+include(CheckIncludeFiles)
+include(CheckSymbolExists)
+include(CheckTypeSize)
+
+# options in AC counterpart can be overriden from command-line
+# e.g.:  cmake .. -DFFI_MMAP_EXEC_EMUTRAMP_PAX=1 -DVERSION=X.Y
+if(NOT DEFINED VERSION)
+    set(VERSION 3.x-dev)
+endif()
+set(PACKAGE libffi)
+set(PACKAGE_BUGREPORT http://github.com/libffi/libffi/issues)
+set(PACKAGE_NAME ${PACKAGE})
+set(PACKAGE_STRING "${PACKAGE} ${VERSION}")
+set(PACKAGE_TARNAME ${PACKAGE})
+set(PACKAGE_URL http://github.com/libffi/libffi)
+set(PACKAGE_VERSION ${VERSION})
+set(TARGET ${TARGET_PLATFORM})
+set(LT_OBJDIR .libs/)
+set(prefix ../..)
+set(exec_prefix \${prefix})
+set(libdir \${exec_prefix}/lib)
+set(toolexeclibdir \${exec_prefix}/lib)
+set(includedir \${prefix}/include)
+
+check_type_size (size_t SIZEOF_SIZE_T)
+
+if(SIZEOF_SIZE_T STREQUAL "")
+    set(size_t "unsinged int")
+endif()
+
+if(MSVC)
+    get_filename_component(COMPILER_DIR "${CMAKE_C_COMPILER}" DIRECTORY)
+else()
+    enable_language(ASM)
+endif()
+
+set(FFI_EXEC_TRAMPOLINE_TABLE 0)
+if(TARGET_PLATFORM STREQUAL X86_WIN64)
+    if(MSVC)
+        list(APPEND WIN_ASSEMBLY_LIST src/x86/win64_intel.S)
+        enable_language(ASM_MASM)
+    else()
+        list(APPEND SOURCES_LIST src/x86/win64.S)
+    endif()
+    list(APPEND SOURCES_LIST src/x86/ffiw64.c)
+
+    set(TARGETDIR x86)
+elseif(TARGET_PLATFORM STREQUAL X86_64)
+    list(APPEND SOURCES_LIST
+        src/x86/ffi64.c
+        src/x86/unix64.S)
+
+    if(SIZEOF_SIZE_T EQUAL 4 AND TARGET_PLATFORM MATCHES X86.*)
+        set(CMAKE_REQUIRED_FLAGS "-Werror")
+
+        check_c_source_compiles(
+            "
+            int main(void)
+            {
+                return __x86_64__;
+            }
+            "
+            TARGET_X32)
+
+        set(CMAKE_REQUIRED_FLAGS)
+    endif()
+
+    if(NOT TARGET_X32)
+        list(APPEND SOURCES_LIST
+             src/x86/ffiw64.c
+             src/x86/win64.S)
+    endif()
+
+    set(TARGETDIR x86)
+elseif(TARGET_PLATFORM MATCHES X86.*)
+    if(MSVC)
+        list(APPEND WIN_ASSEMBLY_LIST src/x86/sysv_intel.S)
+        enable_language(ASM_MASM)
+    else()
+        list(APPEND SOURCES_LIST src/x86/sysv.S)
+    endif()
+
+    list(APPEND SOURCES_LIST src/x86/ffi.c)
+    set(TARGETDIR x86)
+elseif(TARGET_PLATFORM MATCHES ARM_WIN64|AARCH64)
+    if(TARGET_PLATFORM STREQUAL ARM_WIN64)
+        set(CMAKE_ASM_MASM_COMPILER ${COMPILER_DIR}/armasm64.exe)
+        set(CMAKE_ASM_COMPILER ${CMAKE_ASM_MASM_COMPILER})
+        list(APPEND WIN_ASSEMBLY_LIST src/aarch64/win64_armasm.S)
+        file(COPY src/aarch64/ffitarget.h DESTINATION ${CMAKE_BINARY_DIR}/include)
+        enable_language(ASM)
+    else()
+        list(APPEND SOURCES_LIST src/aarch64/sysv.S)
+    endif()
+
+    list(APPEND SOURCES_LIST src/aarch64/ffi.c)
+    set(TARGETDIR aarch64)
+elseif(TARGET_PLATFORM MATCHES ARM.*)
+    if(MSVC)
+        set(CMAKE_ASM_MASM_COMPILER ${COMPILER_DIR}/armasm.exe)
+        set(CMAKE_ASM_COMPILER ${CMAKE_ASM_MASM_COMPILER})
+        list(APPEND WIN_ASSEMBLY_LIST src/arm/sysv_msvc_arm32.S)
+        file(COPY src/arm/ffitarget.h DESTINATION ${CMAKE_BINARY_DIR}/include)
+        enable_language(ASM)
+    else()
+        list(APPEND SOURCES_LIST src/arm/sysv.S)
+    endif()
+
+    list(APPEND SOURCES_LIST src/arm/ffi.c)
+    set(TARGETDIR arm)
+endif()
+
+if(CMAKE_SYSTEM_NAME STREQUAL Darwin AND TARGET_PLATFORM STREQUAL AARCH64)
+    set(FFI_EXEC_TRAMPOLINE_TABLE 1)
+elseif(CMAKE_SYSTEM_NAME STREQUAL Darwin OR TARGET_PLATFORM MATCHES .*FREEBSD.*)
+    set(FFI_MMAP_EXEC_WRIT 1)
+endif()
+
+check_type_size (double SIZEOF_DOUBLE)
+check_type_size ("long double" SIZEOF_LONG_DOUBLE)
+
+if(SIZEOF_LONG_DOUBLE STREQUAL "")
+    set(HAVE_LONG_DOUBLE 0)
+
+    if(DEFINED HAVE_LONG_DOUBLE_VARIANT)
+        set(HAVE_LONG_DOUBLE 1)
+    elseif(NOT SIZEOF_DOUBLE EQUAL SIZEOF_LONG_DOUBLE)
+        set(HAVE_LONG_DOUBLE 1)
+    endif()
+else()
+    set(HAVE_LONG_DOUBLE 1)
+endif()
+
+check_function_exists(alloca  C_ALLOCA)
+check_function_exists (mmap HAVE_MMAP)
+
+check_symbol_exists (MAP_ANON sys/mman.h HAVE_MMAP_ANON)
+
+check_c_source_runs(
+    "
+    #include <stdlib.h>
+    #include <sys/types.h>
+    #include <sys/mman.h>
+    #include <fcntl.h>
+
+    int main(void) {
+        int devzero = open(\"/dev/zero\", O_RDWR);
+        return devzero == -1 || mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, devzero, 0) == (void *)-1 ? 1 : 0;
+    }" HAVE_MMAP_DEV_ZERO)
+
+check_include_file(alloca.h HAVE_ALLOCA_H)
+
+check_c_source_compiles(
+    "
+    #include <alloca.h>
+    int main()
+    {
+        char* x = alloca(1024);
+        return 0;
+    }
+    "
+    HAVE_ALLOCA)
+
+check_include_file(dlfcn.h HAVE_DLFCN_H)
+check_include_file(inttypes.h HAVE_INTTYPES_H)
+check_include_file(memory.h HAVE_MEMORY_H)
+check_include_file(stdint.h HAVE_STDINT_H)
+check_include_file(stdlib.h HAVE_STDLIB_H)
+check_include_file(strings.h HAVE_STRINGS_H)
+check_include_file(string.h HAVE_STRING_H)
+check_include_file(sys/mman.h HAVE_SYS_MMAN_H)
+check_include_file(sys/stat.h HAVE_SYS_STAT_H)
+check_include_file(sys/types.h HAVE_SYS_TYPES_H)
+check_include_file(unistd.h HAVE_UNISTD_H)
+check_include_files("stdlib.h;stdarg.h;string.h;float.h" STDC_HEADERS)
+
+check_symbol_exists(memcpy string.h HAVE_MEMCPY)
+set(CMAKE_REQUIRED_DEFINITIONS "-D_GNU_SOURCE")
+check_symbol_exists(mkostemp stdlib.h HAVE_MKOSTEMP)
+set(CMAKE_REQUIRED_DEFINITIONS)
+
+if (NOT MSVC)
+    find_program(OBJDUMP objdump)
+    find_program(NM NAMES nm llvm-nm)
+
+    if(OBJDUMP)
+        set(DUMPTOOL_CMD "objdump -t -h") # on macOS -t -h can't be combined
+        set(EH_FRAME_GREP_EXPR "grep -A1 -n eh_frame | grep -q READONLY")
+    elseif(NM)
+        set(DUMPTOOL_CMD "nm -a")
+        set(EH_FRAME_GREP_EXPR "grep -q ' r \.eh_frame'")
+    endif()
+
+    execute_process(
+        COMMAND
+            sh -c "echo 'extern void foo (void); void bar (void) { foo (); foo (); }' | ${CMAKE_C_COMPILER} ${CMAKE_C_FLAGS} -xc -c -fpic -fexceptions -o conftest.o - 2>&1;
+                   ${DUMPTOOL_CMD} conftest.o 2>&1 | ${EH_FRAME_GREP_EXPR}"
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+        OUTPUT_VARIABLE IGNORE
+        ERROR_VARIABLE IGNORE
+        RESULT_VARIABLE HAVE_RO_EH_FRAME_EXITCODE)
+
+    file(REMOVE ${CMAKE_BINARY_DIR}/conftest.*)
+
+    if(HAVE_RO_EH_FRAME_EXITCODE EQUAL "0")
+        set(HAVE_RO_EH_FRAME 1)
+        set(EH_FRAME_FLAGS "a")
+        message(STATUS "Checking if .eh_frame section is read-only - yes")
+    else()
+        set(EH_FRAME_FLAGS "aw")
+        message(STATUS "Checking if .eh_frame section is read-only - no")
+    endif()
+
+    execute_process(
+        COMMAND sh -c "echo '.text; foo: nop; .data; .long foo-.; .text' | ${CMAKE_C_COMPILER} ${CMAKE_C_FLAGS} -xassembler -c -o conftest.o - 2>&1"
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+        OUTPUT_VARIABLE IGNORE
+        ERROR_VARIABLE IGNORE
+        RESULT_VARIABLE HAVE_AS_X86_PCREL_EXITCODE)
+
+    file(REMOVE ${CMAKE_BINARY_DIR}/conftest.*)
+
+    if(HAVE_AS_X86_PCREL_EXITCODE EQUAL "0")
+        set(HAVE_AS_X86_PCREL 1)
+        message(STATUS "Checking HAVE_AS_X86_PCREL - yes")
+    else()
+        message(STATUS "Checking HAVE_AS_X86_PCREL - no")
+    endif()
+
+    execute_process(
+        COMMAND
+            sh -c "echo '.text;.globl foo;foo:;jmp bar;.section .eh_frame,\"a\",@unwind;bar:' | ${CMAKE_C_COMPILER} ${CMAKE_C_FLAGS} -xassembler -Wa,--fatal-warnings -c -o conftest.o - 2>&1 &&
+                   echo 'extern void foo();int main(){foo();}' | ${CMAKE_C_COMPILER} ${CMAKE_C_FLAGS} conftest.o -xc - 2>&1"
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+        OUTPUT_VARIABLE IGNORE
+        ERROR_VARIABLE IGNORE
+        RESULT_VARIABLE HAVE_AS_X86_64_UNWIND_SECTION_TYPE_EXITCODE)
+
+    file(REMOVE ${CMAKE_BINARY_DIR}/conftest.*)
+
+    if(HAVE_AS_X86_64_UNWIND_SECTION_TYPE_EXITCODE EQUAL "0")
+        set(HAVE_AS_X86_64_UNWIND_SECTION_TYPE 1)
+        message(STATUS "Checking HAVE_AS_X86_64_UNWIND_SECTION_TYPE - yes")
+    else()
+        message(STATUS "Checking HAVE_AS_X86_64_UNWIND_SECTION_TYPE - no")
+    endif()
+
+    execute_process(
+        COMMAND sh -c "echo 'int __attribute__ ((visibility (\"hidden\"))) foo(void){return 1;}' | ${CMAKE_C_COMPILER} ${CMAKE_C_FLAGS} -xc -Werror -S -o- - 2>&1 |
+                       grep -q '\\.hidden.*foo'"
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+        OUTPUT_VARIABLE IGNORE
+        ERROR_VARIABLE IGNORE
+        RESULT_VARIABLE HAVE_HIDDEN_VISIBILITY_ATTRIBUTE_EXITCODE)
+
+    if(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE_EXITCODE EQUAL "0")
+        set(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE 1)
+        message(STATUS "Checking HAVE_HIDDEN_VISIBILITY_ATTRIBUTE - yes")
+    else()
+        message(STATUS "Checking HAVE_HIDDEN_VISIBILITY_ATTRIBUTE - no")
+    endif()
+endif()
+
+file(WRITE ${CMAKE_BINARY_DIR}/conftest.c "void nm_test_func(){} int main(){nm_test_func();return 0;}")
+
+if(MSVC)
+    execute_process(
+        COMMAND "${CMAKE_C_COMPILER}" ${CMAKE_C_FLAGS} /c conftest.c
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+        OUTPUT_VARIABLE IGNORE
+        ERROR_VARIABLE IGNORE
+        RESULT_VARIABLE SYMBOL_UNDERSCORE_EXITCODE)
+
+    if(SYMBOL_UNDERSCORE_EXITCODE EQUAL "0")
+        execute_process(
+            COMMAND "${COMPILER_DIR}/dumpbin.exe" /ALL /RAWDATA:NONE conftest.obj | findstr _nm_test_func > NUL
+            WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+            OUTPUT_VARIABLE IGNORE
+            ERROR_VARIABLE IGNORE
+            RESULT_VARIABLE SYMBOL_UNDERSCORE_EXITCODE)
+    endif()
+elseif()
+    execute_process(
+        COMMAND sh -c "${CMAKE_C_COMPILER} ${CMAKE_C_FLAGS} -xc -c -o conftest.o conftest.c 2>&1;
+                       ${DUMPTOOL_CMD} conftest.o 2>&1 | grep -q _nm_test_func"
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+        OUTPUT_VARIABLE IGNORE
+        ERROR_VARIABLE IGNORE
+        RESULT_VARIABLE SYMBOL_UNDERSCORE_EXITCODE)
+endif()
+
+file(REMOVE ${CMAKE_BINARY_DIR}/conftest.*)
+
+if(SYMBOL_UNDERSCORE_EXITCODE EQUAL "0")
+    set(SYMBOL_UNDERSCORE 1)
+    message(STATUS "Checking if symbols are underscored - yes")
+else()
+    message(STATUS "Checking if symbols are underscored - no")
+endif()
+
+check_c_source_compiles(
+    "
+    asm (\".cfi_sections\\\\n\\\\t.cfi_startproc\\\\n\\\\t.cfi_endproc\");
+    int main(void)
+    {
+        return 0;
+    }
+    "
+    HAVE_AS_CFI_PSEUDO_OP)
+
+configure_file(include/ffi.h.in ${CMAKE_BINARY_DIR}/include/ffi.h)
+configure_file(include/fficonfig.h.in ${CMAKE_BINARY_DIR}/include/fficonfig.h)
+configure_file(libffi.pc.in ${CMAKE_LIBRARY_DIR}/pkgconfig/libffi.pc)
+
+foreach(ASM_PATH IN LISTS WIN_ASSEMBLY_LIST)
+    get_filename_component(ASM_FILENAME "${ASM_PATH}" NAME_WE)
+    get_filename_component(ASM_DIRNAME "${ASM_PATH}" DIRECTORY)
+
+    add_custom_command(
+        COMMAND "${CMAKE_C_COMPILER}" /nologo /P /EP /I. /I"${CMAKE_CURRENT_SOURCE_DIR}/${ASM_DIRNAME}" /Fi"${CMAKE_BINARY_DIR}/${ASM_FILENAME}.asm" /Iinclude
+                /I"${CMAKE_CURRENT_SOURCE_DIR}/include" "${CMAKE_CURRENT_SOURCE_DIR}/${ASM_PATH}"
+        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${ASM_PATH}
+        OUTPUT ${CMAKE_BINARY_DIR}/${ASM_FILENAME}.asm
+        COMMENT "Preprocessing ${CMAKE_CURRENT_SOURCE_DIR}/${ASM_PATH}. Outputting to ${CMAKE_BINARY_DIR}/${ASM_FILENAME}.asm")
+
+    set_source_files_properties("${CMAKE_BINARY_DIR}/${ASM_FILENAME}.asm" PROPERTIES GENERATED TRUE)
+
+    add_custom_command(
+        COMMAND "${CMAKE_ASM_MASM_COMPILER}" /Fo "${CMAKE_CURRENT_BINARY_DIR}/${ASM_FILENAME}.obj" "${CMAKE_BINARY_DIR}/${ASM_FILENAME}.asm"
+        DEPENDS ${CMAKE_BINARY_DIR}/${ASM_FILENAME}.asm
+        OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ASM_FILENAME}.obj
+        COMMENT "Assembling ${CMAKE_BINARY_DIR}/${ASM_FILENAME}.asm")
+
+    set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${ASM_FILENAME}.obj PROPERTIES EXTERNAL_OBJECT TRUE)
+
+    list(APPEND OBJECTS_LIST ${CMAKE_CURRENT_BINARY_DIR}/${ASM_FILENAME}.obj)
+endforeach()
diff --git a/configure_platform.cmake b/configure_platform.cmake
new file mode 100644
index 0000000..bc57a65
--- /dev/null
+++ b/configure_platform.cmake
@@ -0,0 +1,43 @@
+if("${CMAKE_C_COMPILER_ARCHITECTURE_ID}" STREQUAL "")
+    set(HOST_ARCH ${CMAKE_SYSTEM_PROCESSOR})
+else()
+    set(HOST_ARCH ${CMAKE_C_COMPILER_ARCHITECTURE_ID})
+endif()
+
+if("${TARGET_PLATFORM}" STREQUAL "")
+    if(HOST_ARCH MATCHES x64|x86_64|AMD64|amd64)
+        if(CMAKE_SYSTEM_NAME STREQUAL Windows)
+            set(TARGET_PLATFORM X86_WIN64)
+        else()
+            set(TARGET_PLATFORM X86_64)
+        endif()
+    elseif(HOST_ARCH MATCHES i.*86.*|X86|x86)
+        if(MSVC)
+            set(TARGET_PLATFORM X86_WIN32)
+        else()
+            set(TARGET_PLATFORM X86)
+        endif()
+
+        if(CMAKE_SYSTEM_NAME STREQUAL Darwin)
+            set(TARGET_PLATFORM X86_DARWIN)
+        elseif(CMAKE_SYSTEM_NAME MATCHES FreeBSD|OpenBSD)
+            set(TARGET_PLATFORM X86_FREEBSD)
+        endif()
+    elseif(HOST_ARCH MATCHES aarch64|ARM64|arm64)
+        if(MSVC)
+            set(TARGET_PLATFORM ARM_WIN64)
+        else()
+            set(TARGET_PLATFORM AARCH64)
+        endif()
+    elseif(HOST_ARCH MATCHES arm.*|ARM.*)
+        if(MSVC)
+            set(TARGET_PLATFORM ARM_WIN32)
+        else()
+            set(TARGET_PLATFORM ARM)
+        endif()
+    else()
+        message(FATAL_ERROR "Unknown host.")
+    endif()
+endif()
+
+message(STATUS "Building for TARGET_PLATFORM: ${TARGET_PLATFORM}")
diff --git a/include/fficonfig.h.in b/include/fficonfig.h.in
new file mode 100644
index 0000000..1b36207
--- /dev/null
+++ b/include/fficonfig.h.in
@@ -0,0 +1,210 @@
+/* fficonfig.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Define if building universal (internal helper macro) */
+#cmakedefine AC_APPLE_UNIVERSAL_BUILD
+
+/* Define to one of `_getb67', `GETB67', `getb67' for Cray-2 and Cray-YMP
+   systems. This function is required for `alloca.c' support on those systems.
+   */
+#cmakedefine CRAY_STACKSEG_END "@CRAY_STACKSEG_END@"
+
+/* Define if using `alloca.c'. */
+#cmakedefine C_ALLOCA
+
+/* Define to the flags needed for the .section .eh_frame directive. */
+#cmakedefine EH_FRAME_FLAGS "@EH_FRAME_FLAGS@"
+
+/* Define this if you want extra debugging. */
+#cmakedefine FFI_DEBUG
+
+/* Cannot use PROT_EXEC on this target, so, we revert to alternative means */
+#cmakedefine FFI_EXEC_TRAMPOLINE_TABLE
+
+/* Define this if you want to enable pax emulated trampolines */
+#cmakedefine FFI_MMAP_EXEC_EMUTRAMP_PAX
+
+/* Cannot use malloc on this target, so, we revert to alternative means */
+#cmakedefine01 FFI_MMAP_EXEC_WRIT
+
+/* Define this if you do not want support for the raw API. */
+#cmakedefine01 FFI_NO_RAW_API
+
+/* Define this if you do not want support for aggregate types. */
+#cmakedefine01 FFI_NO_STRUCTS
+
+/* Define to 1 if you have `alloca', as a function or macro. */
+#cmakedefine01 HAVE_ALLOCA
+
+/* Define to 1 if you have <alloca.h> and it should be used (not on Ultrix).
+   */
+#cmakedefine01 HAVE_ALLOCA_H
+
+/* Define if your assembler supports .cfi_* directives. */
+#cmakedefine HAVE_AS_CFI_PSEUDO_OP
+
+/* Define if your assembler supports .register. */
+#cmakedefine HAVE_AS_REGISTER_PSEUDO_OP
+
+/* Define if the compiler uses zarch features. */
+#cmakedefine HAVE_AS_S390_ZARCH
+
+/* Define if your assembler and linker support unaligned PC relative relocs.
+   */
+#cmakedefine HAVE_AS_SPARC_UA_PCREL
+
+/* Define if your assembler supports unwind section type. */
+#cmakedefine HAVE_AS_X86_64_UNWIND_SECTION_TYPE
+
+/* Define if your assembler supports PC relative relocs. */
+#cmakedefine HAVE_AS_X86_PCREL
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#cmakedefine01 HAVE_DLFCN_H
+
+/* Define if __attribute__((visibility("hidden"))) is supported. */
+#cmakedefine HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#cmakedefine01 HAVE_INTTYPES_H
+
+/* Define if you have the long double type and it is bigger than a double */
+#cmakedefine01 HAVE_LONG_DOUBLE
+
+/* Define if you support more than one size of the long double type */
+#cmakedefine HAVE_LONG_DOUBLE_VARIANT
+
+/* Define to 1 if you have the `memcpy' function. */
+#cmakedefine01 HAVE_MEMCPY
+
+/* Define to 1 if you have the <memory.h> header file. */
+#cmakedefine01 HAVE_MEMORY_H
+
+/* Define to 1 if you have the `mkostemp' function. */
+#cmakedefine01 HAVE_MKOSTEMP
+
+/* Define to 1 if you have the `mmap' function. */
+#cmakedefine01 HAVE_MMAP
+
+/* Define if mmap with MAP_ANON(YMOUS) works. */
+#cmakedefine HAVE_MMAP_ANON
+
+/* Define if mmap of /dev/zero works. */
+#cmakedefine HAVE_MMAP_DEV_ZERO
+
+/* Define if read-only mmap of a plain file works. */
+#cmakedefine HAVE_MMAP_FILE
+
+/* Define if .eh_frame sections should be read-only. */
+#cmakedefine HAVE_RO_EH_FRAME
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#cmakedefine01 HAVE_STDINT_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#cmakedefine01 HAVE_STDLIB_H
+
+/* Define to 1 if you have the <strings.h> header file. */
+#cmakedefine01 HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#cmakedefine01 HAVE_STRING_H
+
+/* Define to 1 if you have the <sys/mman.h> header file. */
+#cmakedefine01 HAVE_SYS_MMAN_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#cmakedefine01 HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#cmakedefine01 HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#cmakedefine01 HAVE_UNISTD_H
+
+/* Define to the sub-directory where libtool stores uninstalled libraries. */
+#cmakedefine LT_OBJDIR "@LT_OBJDIR@"
+
+/* Name of package */
+#cmakedefine PACKAGE "@PACKAGE@"
+
+/* Define to the address where bug reports for this package should be sent. */
+#cmakedefine PACKAGE_BUGREPORT "@PACKAGE_BUGREPORT@"
+
+/* Define to the full name of this package. */
+#cmakedefine PACKAGE_NAME "@PACKAGE_NAME@"
+
+/* Define to the full name and version of this package. */
+#cmakedefine PACKAGE_STRING "@PACKAGE_STRING@"
+
+/* Define to the one symbol short name of this package. */
+#cmakedefine PACKAGE_TARNAME "@PACKAGE_TARNAME@"
+
+/* Define to the home page for this package. */
+#cmakedefine PACKAGE_URL "@PACKAGE_URL@"
+
+/* Define to the version of this package. */
+#cmakedefine PACKAGE_VERSION "@PACKAGE_VERSION@"
+
+/* The size of `double', as computed by sizeof. */
+#cmakedefine SIZEOF_DOUBLE @SIZEOF_DOUBLE@
+
+/* The size of `long double', as computed by sizeof. */
+#cmakedefine SIZEOF_LONG_DOUBLE @SIZEOF_LONG_DOUBLE@
+
+/* The size of `size_t', as computed by sizeof. */
+#cmakedefine SIZEOF_SIZE_T @SIZEOF_SIZE_T@
+
+/* If using the C implementation of alloca, define if you know the
+   direction of stack growth for your system; otherwise it will be
+   automatically deduced at runtime.
+	STACK_DIRECTION > 0 => grows toward higher addresses
+	STACK_DIRECTION < 0 => grows toward lower addresses
+	STACK_DIRECTION = 0 => direction of growth unknown */
+#cmakedefine STACK_DIRECTION @STACK_DIRECTION@
+
+/* Define to 1 if you have the ANSI C header files. */
+#cmakedefine01 STDC_HEADERS
+
+/* Define if symbols are underscored. */
+#cmakedefine SYMBOL_UNDERSCORE
+
+/* Define this if you are using Purify and want to suppress spurious messages.
+   */
+#cmakedefine USING_PURIFY
+
+/* Version number of package */
+#cmakedefine VERSION "@VERSION@"
+
+/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
+   significant byte first (like Motorola and SPARC, unlike Intel). */
+#if defined AC_APPLE_UNIVERSAL_BUILD
+# if defined __BIG_ENDIAN__
+#  define WORDS_BIGENDIAN 1
+# endif
+#else
+# ifndef WORDS_BIGENDIAN
+#  undef WORDS_BIGENDIAN
+# endif
+#endif
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#cmakedefine size_t @size_t@
+
+
+#ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
+#ifdef LIBFFI_ASM
+#ifdef __APPLE__
+#define FFI_HIDDEN(name) .private_extern name
+#else
+#define FFI_HIDDEN(name) .hidden name
+#endif
+#else
+#define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
+#endif
+#else
+#ifdef LIBFFI_ASM
+#define FFI_HIDDEN(name)
+#else
+#define FFI_HIDDEN
+#endif
+#endif
diff --git a/src/closures.c b/src/closures.c
index 5120021..c329077 100644
--- a/src/closures.c
+++ b/src/closures.c
@@ -137,6 +137,7 @@ ffi_closure_free (void *ptr)
 /* Windows systems may have Data Execution Protection (DEP) enabled,
    which requires the use of VirtualMalloc/VirtualFree to alloc/free
    executable memory. */
+#  undef FFI_MMAP_EXEC_WRIT
 #  define FFI_MMAP_EXEC_WRIT 1
 # endif
 #endif
diff --git a/src/dlmalloc.c b/src/dlmalloc.c
index d63dd36..950e977 100644
--- a/src/dlmalloc.c
+++ b/src/dlmalloc.c
@@ -451,6 +451,7 @@ DEFAULT_MMAP_THRESHOLD       default: 256K
 #ifdef WIN32
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
+#undef HAVE_MMAP
 #define HAVE_MMAP 1
 #define HAVE_MORECORE 0
 #define LACKS_UNISTD_H
-- 
2.23.0