Added x86 and x86_64 support (issue #2)

README.md

@@ -116,6 +116,11 @@ prebuilt_ndk = 'ndk'
 so that the building script can find the `ndk/platforms` folder
 correctly.
 
+**Note:** When building the x86 or x86_64 toolchains, additional changes are
+required. There is an issue in libgfortran for the x86 and x86_64 targets
+(see [this issue](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71363)) causing
+an error when building it. See the `x86.diff`.
+
 **Note:** When building the toolchain for Windows,
 you need to change `ndk/build/tools/prebuilt-common.sh` for the MinGW
 wrapper to be found. Find the line that says:

x86.diff

@@ -0,0 +1,30 @@
+diff --git a/gcc-4.9/libgfortran/mk-kinds-h.sh b/gcc-4.9/libgfortran/mk-kinds-h.sh
+index 98a95ab..fdbccb0 100755
+--- a/gcc-4.9/libgfortran/mk-kinds-h.sh
++++ b/gcc-4.9/libgfortran/mk-kinds-h.sh
+@@ -51,7 +51,10 @@ echo "use iso_c_binding; print *, c_long_double ; end" > tmq$$.f90
+ long_double_kind=`$compile -S -fdump-parse-tree tmq$$.f90 | grep TRANSFER \
+ 			| sed 's/ *TRANSFER *//'`
+ rm -f tmq$$.*
+-
++echo "use iso_c_binding; print *, c_double ; end" > tmq$$.f90
++double_kind=`$compile -S -fdump-parse-tree tmq$$.f90 | grep TRANSFER \
++			| sed 's/ *TRANSFER *//'`
++rm -f tmq$$.*
+
+ for k in $possible_real_kinds; do
+   echo "  real (kind=$k) :: x" > tmp$$.f90
+@@ -66,10 +69,12 @@ for k in $possible_real_kinds; do
+ 	    ctype="__float128"
+ 	    cplxtype="_Complex float __attribute__((mode(TC)))"
+ 	    suffix="q"
+-	  else
++      elif [ $long_double_kind -ne $double_kind ]; then
+ 	    ctype="long double"
+ 	    cplxtype="complex long double"
+ 	    suffix="l"
++      else
++        break;
+ 	  fi ;;
+       *) echo "$0: Unknown type" >&2 ; exit 1 ;;
+     esac