Fixes for compilation to iOS:

- remove /usr/include from the include path since the iOS SDK provides the correct version
- `_NSGetEnviron()` is private and not available on iOS
- `.align` without an argument is not allowed with the Apple tools. 2^2 should be the default alignment
- ignore error messages for XCode < 5
- pass include path to libuv

Author: kud1ing

mk/platform.mk

@@ -195,8 +195,8 @@ CFG_RUN_TARG_i686-unknown-linux-gnu=$(call CFG_RUN_i686-unknown-linux-gnu,,$(2))
 
 # arm-apple-darwin configuration
 ifeq ($(CFG_OSTYPE),apple-darwin)
-CFG_IOS_SDK = $(shell xcrun --show-sdk-path -sdk iphoneos)
-CFG_IOS_FLAGS = -target arm-apple-darwin -isysroot $(CFG_IOS_SDK) -I $(CFG_IOS_SDK)/usr/include -I $(CFG_IOS_SDK)/usr/include/c++/4.2.1 -I /usr/include
+CFG_IOS_SDK = $(shell xcrun --show-sdk-path -sdk iphoneos 2>/dev/null)
+CFG_IOS_FLAGS = -target arm-apple-darwin -isysroot $(CFG_IOS_SDK) -I$(CFG_IOS_SDK)/usr/include -I$(CFG_IOS_SDK)/usr/include/c++/4.2.1
 CC_arm-apple-darwin = $(shell xcrun -find -sdk iphoneos clang)
 CXX_arm-apple-darwin = $(shell xcrun -find -sdk iphoneos clang++)
 CPP_arm-apple-darwin = $(shell xcrun -find -sdk iphoneos clang++)

mk/rt.mk

@@ -28,6 +28,13 @@ LIBUV_FLAGS_i386 = -m32 -fPIC -I$(S)src/etc/mingw-fix-include
 LIBUV_FLAGS_x86_64 = -m64 -fPIC
 ifeq ($(OSTYPE_$(1)), linux-androideabi)
 LIBUV_FLAGS_arm = -fPIC -DANDROID -std=gnu99
+else ifeq ($(OSTYPE_$(1)), apple-darwin)
+  ifeq ($(HOST_$(1)), arm)
+    IOS_SDK := $(shell xcrun --show-sdk-path -sdk iphoneos 2>/dev/null)
+    LIBUV_FLAGS_arm := -fPIC -std=gnu99 -I$(IOS_SDK)/usr/include -I$(IOS_SDK)/usr/include/c++/4.2.1
+  else
+    LIBUV_FLAGS_arm := -fPIC -std=gnu99
+  endif
 else
 LIBUV_FLAGS_arm = -fPIC -std=gnu99
 endif

src/rt/arch/arm/_context.S

@@ -6,8 +6,11 @@
 .text
 .code 32
 .arm
+#if defined(__APPLE__)
+.align 2
+#else
 .align
-
+#endif
 
 .globl swap_registers
 swap_registers:

src/rt/arch/arm/record_sp.S

@@ -6,8 +6,11 @@
 .text
 .code 32
 .arm
+#if defined(__APPLE__)
+.align 2
+#else
 .align
-
+#endif
 
 .globl record_sp_limit
 .globl get_sp_limit

src/rt/rust_builtin.cpp

@@ -18,8 +18,14 @@
 #include <time.h>
 
 #ifdef __APPLE__
-#include <crt_externs.h>
-#include <mach/mach_time.h>
+    #include <TargetConditionals.h>
+    #include <mach/mach_time.h>
+
+    #if (TARGET_OS_IPHONE)
+        extern char **environ;
+    #else
+        #include <crt_externs.h>
+    #endif
 #endif
 
 #if !defined(__WIN32__)
@@ -58,7 +64,7 @@ rust_env_pairs() {
 #else
 extern "C" CDECL char**
 rust_env_pairs() {
-#ifdef __APPLE__
+#if defined(__APPLE__) && !(TARGET_OS_IPHONE)
     char **environ = *_NSGetEnviron();
 #endif
     return environ;