Add iOS support

configure

@@ -795,6 +795,9 @@ FFI_DEBUG_FALSE
 FFI_DEBUG_TRUE
 TARGETDIR
 TARGET
+FFI_EXEC_TRAMPOLINE_TABLE
+FFI_EXEC_TRAMPOLINE_TABLE_FALSE
+FFI_EXEC_TRAMPOLINE_TABLE_TRUE
 sys_symbol_underscore
 HAVE_LONG_DOUBLE
 ALLOCA
@@ -4783,13 +4786,13 @@ if test "${lt_cv_nm_interface+set}" = set; then
 else
   lt_cv_nm_interface="BSD nm"
   echo "int some_variable = 0;" > conftest.$ac_ext
-  (eval echo "\"\$as_me:4786: $ac_compile\"" >&5)
+  (eval echo "\"\$as_me:4789: $ac_compile\"" >&5)
   (eval "$ac_compile" 2>conftest.err)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:4789: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval echo "\"\$as_me:4792: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
   (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:4792: output\"" >&5)
+  (eval echo "\"\$as_me:4795: output\"" >&5)
   cat conftest.out >&5
   if $GREP 'External.*some_variable' conftest.out > /dev/null; then
     lt_cv_nm_interface="MS dumpbin"
@@ -5995,7 +5998,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 5998 "configure"' > conftest.$ac_ext
+  echo '#line 6001 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -7852,11 +7855,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7855: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7858: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:7859: \$? = $ac_status" >&5
+   echo "$as_me:7862: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -8191,11 +8194,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8194: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8197: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:8198: \$? = $ac_status" >&5
+   echo "$as_me:8201: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -8296,11 +8299,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8299: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8302: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:8303: \$? = $ac_status" >&5
+   echo "$as_me:8306: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -8351,11 +8354,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8354: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8357: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:8358: \$? = $ac_status" >&5
+   echo "$as_me:8361: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -11154,7 +11157,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11157 "configure"
+#line 11160 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11250,7 +11253,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11253 "configure"
+#line 11256 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -14716,7 +14719,17 @@ _ACEOF
     fi
 fi
 
+
+FFI_EXEC_TRAMPOLINE_TABLE=0
 case "$target" in
+     *arm*-apple-darwin*)
+       FFI_EXEC_TRAMPOLINE_TABLE=1
+
+cat >>confdefs.h <<\_ACEOF
+#define FFI_EXEC_TRAMPOLINE_TABLE 1
+_ACEOF
+
+     ;;
      *-apple-darwin10* | *-*-freebsd* | *-*-openbsd* | *-pc-solaris*)
 
 cat >>confdefs.h <<\_ACEOF
@@ -14725,6 +14738,15 @@ _ACEOF
 
      ;;
 esac
+ if test x$FFI_EXEC_TRAMPOLINE_TABLE = x1; then
+  FFI_EXEC_TRAMPOLINE_TABLE_TRUE=
+  FFI_EXEC_TRAMPOLINE_TABLE_FALSE='#'
+else
+  FFI_EXEC_TRAMPOLINE_TABLE_TRUE='#'
+  FFI_EXEC_TRAMPOLINE_TABLE_FALSE=
+fi
+
+
 
 if test x$TARGET = xX86_64; then
     { $as_echo "$as_me:$LINENO: checking assembler supports unwind section type" >&5
@@ -15249,6 +15271,13 @@ Usually this means the macro was only invoked conditionally." >&2;}
    { (exit 1); exit 1; }; }
 fi
 
+if test -z "${FFI_EXEC_TRAMPOLINE_TABLE_TRUE}" && test -z "${FFI_EXEC_TRAMPOLINE_TABLE_FALSE}"; then
+  { { $as_echo "$as_me:$LINENO: error: conditional \"FFI_EXEC_TRAMPOLINE_TABLE\" was never defined.
+Usually this means the macro was only invoked conditionally." >&5
+$as_echo "$as_me: error: conditional \"FFI_EXEC_TRAMPOLINE_TABLE\" was never defined.
+Usually this means the macro was only invoked conditionally." >&2;}
+   { (exit 1); exit 1; }; }
+fi
 if test -z "${FFI_DEBUG_TRUE}" && test -z "${FFI_DEBUG_FALSE}"; then
   { { $as_echo "$as_me:$LINENO: error: conditional \"FFI_DEBUG\" was never defined.
 Usually this means the macro was only invoked conditionally." >&5