support to be included by add_subdirectory

remove TRYRUN to allow cross compile

fix windows 32bit build

CMakeLists.txt

@@ -30,6 +30,10 @@ set_property(TARGET objlib PROPERTY POSITION_INDEPENDENT_CODE 1)
 
 add_library(ffi_static STATIC $<TARGET_OBJECTS:objlib>)
 
+target_include_directories(
+  ffi_static PUBLIC
+  "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>")
+
 if(MSVC)
     add_definitions(-DFFI_BUILDING_DLL)
     set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
@@ -38,6 +42,10 @@ elseif(CMAKE_SYSTEM_NAME MATCHES Darwin)
 endif()
 add_library(ffi_shared SHARED $<TARGET_OBJECTS:objlib> ${OBJECTS_LIST})
 
+target_include_directories(
+  ffi_shared PUBLIC
+  "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>")
+
 set_target_properties(ffi_static PROPERTIES OUTPUT_NAME ffi)
 set_target_properties(ffi_shared PROPERTIES OUTPUT_NAME ffi)
 

configure_options.cmake

@@ -136,17 +136,7 @@ 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)
+set(HAVE_MMAP_DEV_ZERO OFF)
 
 check_include_file(alloca.h HAVE_ALLOCA_H)
 

configure_platform.cmake

@@ -4,6 +4,7 @@ else()
     set(HOST_ARCH ${CMAKE_C_COMPILER_ARCHITECTURE_ID})
 endif()
 
+
 if("${TARGET_PLATFORM}" STREQUAL "")
     if(HOST_ARCH MATCHES x64|x86_64|AMD64|amd64)
         if(CMAKE_SYSTEM_NAME STREQUAL Windows)
@@ -12,7 +13,7 @@ if("${TARGET_PLATFORM}" STREQUAL "")
             set(TARGET_PLATFORM X86_64)
         endif()
     elseif(HOST_ARCH MATCHES i.*86.*|X86|x86)
-        if(MSVC)
+        if(CMAKE_SYSTEM_NAME MATCHES Windows)
             set(TARGET_PLATFORM X86_WIN32)
         else()
             set(TARGET_PLATFORM X86)
@@ -24,13 +25,13 @@ if("${TARGET_PLATFORM}" STREQUAL "")
             set(TARGET_PLATFORM X86_FREEBSD)
         endif()
     elseif(HOST_ARCH MATCHES aarch64|ARM64|arm64)
-        if(MSVC)
+        if(CMAKE_SYSTEM_NAME MATCHES Windows)
             set(TARGET_PLATFORM ARM_WIN64)
         else()
             set(TARGET_PLATFORM AARCH64)
         endif()
     elseif(HOST_ARCH MATCHES arm.*|ARM.*)
-        if(MSVC)
+        if(CMAKE_SYSTEM_NAME MATCHES Windows)
             set(TARGET_PLATFORM ARM_WIN32)
         else()
             set(TARGET_PLATFORM ARM)