Patch to make SpiderMonkey build on RISC-V

riscv64-spidermonkey.patch

diff -ur mozilla-central-79feeed42933.orig/build/autoconf/config.guess mozilla-central-79feeed42933/build/autoconf/config.guess
--- mozilla-central-79feeed42933.orig/build/autoconf/config.guess	2016-11-15 23:25:35.000000000 +0000
+++ mozilla-central-79feeed42933/build/autoconf/config.guess	2016-11-16 05:01:37.000000000 +0000
@@ -2,7 +2,7 @@
 # Attempt to guess a canonical system name.
 #   Copyright 1992-2016 Free Software Foundation, Inc.
 
-timestamp='2016-03-24'
+timestamp='2016-10-02'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -186,9 +186,12 @@
 	    *) machine=${UNAME_MACHINE_ARCH}-unknown ;;
 	esac
 	# The Operating System including object format, if it has switched
-	# to ELF recently, or will in the future.
+	# to ELF recently (or will in the future) and ABI.
 	case "${UNAME_MACHINE_ARCH}" in
-	    arm*|earm*|i386|m68k|ns32k|sh3*|sparc|vax)
+	    earm*)
+		os=netbsdelf
+		;;
+	    arm*|i386|m68k|ns32k|sh3*|sparc|vax)
 		eval $set_cc_for_build
 		if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \
 			| grep -q __ELF__
@@ -386,7 +389,7 @@
 	# This test works for both compilers.
 	if [ "$CC_FOR_BUILD" != no_compiler_found ]; then
 	    if (echo '#ifdef __amd64'; echo IS_64BIT_ARCH; echo '#endif') | \
-		(CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \
+		(CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
 		grep IS_64BIT_ARCH >/dev/null
 	    then
 		SUN_ARCH=x86_64
@@ -684,7 +687,7 @@
 		    exit (0);
 		}
 EOF
-		    (CCOPTS= $CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null) && HP_ARCH=`$dummy`
+		    (CCOPTS="" $CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null) && HP_ARCH=`$dummy`
 		    test -z "$HP_ARCH" && HP_ARCH=hppa
 		fi ;;
 	esac
@@ -701,7 +704,7 @@
 	    # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess
 	    # => hppa64-hp-hpux11.23
 
-	    if echo __LP64__ | (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) |
+	    if echo __LP64__ | (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) |
 		grep -q __LP64__
 	    then
 		HP_ARCH=hppa2.0w
@@ -900,7 +903,7 @@
 	exit ;;
     *:GNU/*:*:*)
 	# other systems with GNU libc and userland
-	echo ${UNAME_MACHINE}-unknown-`echo ${UNAME_SYSTEM} | sed 's,^[^/]*/,,' | tr '[A-Z]' '[a-z]'``echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`-${LIBC}
+	echo ${UNAME_MACHINE}-unknown-`echo ${UNAME_SYSTEM} | sed 's,^[^/]*/,,' | tr "[:upper:]" "[:lower:]"``echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`-${LIBC}
 	exit ;;
     i*86:Minix:*:*)
 	echo ${UNAME_MACHINE}-pc-minix
@@ -997,6 +1000,9 @@
 	eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^CPU'`
 	test x"${CPU}" != x && { echo "${CPU}-unknown-linux-${LIBC}"; exit; }
 	;;
+    mips64el:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
+	exit ;;
     openrisc*:Linux:*:*)
 	echo or1k-unknown-linux-${LIBC}
 	exit ;;
@@ -1029,6 +1035,9 @@
     ppcle:Linux:*:*)
 	echo powerpcle-unknown-linux-${LIBC}
 	exit ;;
+    riscv32:Linux:*:* | riscv64:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
+	exit ;;
     s390:Linux:*:* | s390x:Linux:*:*)
 	echo ${UNAME_MACHINE}-ibm-linux-${LIBC}
 	exit ;;
@@ -1294,7 +1303,7 @@
 	if test `echo "$UNAME_RELEASE" | sed -e 's/\..*//'` -le 10 ; then
 	    if [ "$CC_FOR_BUILD" != no_compiler_found ]; then
 		if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \
-		    (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \
+		    (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
 		    grep IS_64BIT_ARCH >/dev/null
 		then
 		    case $UNAME_PROCESSOR in
@@ -1389,7 +1398,7 @@
 	echo i386-pc-xenix
 	exit ;;
     i*86:skyos:*:*)
-	echo ${UNAME_MACHINE}-pc-skyos`echo ${UNAME_RELEASE}` | sed -e 's/ .*$//'
+	echo ${UNAME_MACHINE}-pc-skyos`echo ${UNAME_RELEASE} | sed -e 's/ .*$//'`
 	exit ;;
     i*86:rdos:*:*)
 	echo ${UNAME_MACHINE}-pc-rdos
@@ -1408,18 +1417,17 @@
 cat >&2 <<EOF
 $0: unable to guess system type
 
-This script, last modified $timestamp, has failed to recognize
-the operating system you are using. It is advised that you
-download the most up to date version of the config scripts from
+This script (version $timestamp), has failed to recognize the
+operating system you are using. If your script is old, overwrite
+config.guess and config.sub with the latest versions from:
 
   http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess
 and
   http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub
 
-If the version you run ($0) is already up to date, please
-send the following data and any information you think might be
-pertinent to <config-patches@gnu.org> in order to provide the needed
-information to handle your system.
+If $0 has already been updated, send the following data and any
+information you think might be pertinent to config-patches@gnu.org to
+provide the necessary information to handle your system.
 
 config.guess timestamp = $timestamp
 
diff -ur mozilla-central-79feeed42933.orig/build/moz.configure/init.configure mozilla-central-79feeed42933/build/moz.configure/init.configure
--- mozilla-central-79feeed42933.orig/build/moz.configure/init.configure	2016-11-15 23:25:35.000000000 +0000
+++ mozilla-central-79feeed42933/build/moz.configure/init.configure	2016-11-16 05:19:20.000000000 +0000
@@ -418,6 +418,9 @@
     elif cpu.startswith('aarch64'):
         canonical_cpu = 'aarch64'
         endianness = 'little'
+    elif cpu in ('riscv32', 'riscv64'):
+        canonical_cpu = cpu
+        endianness = 'little'
     else:
         die('Unknown CPU type: %s' % cpu)
 
diff -ur mozilla-central-79feeed42933.orig/js/src/jit/none/MacroAssembler-none.h mozilla-central-79feeed42933/js/src/jit/none/MacroAssembler-none.h
--- mozilla-central-79feeed42933.orig/js/src/jit/none/MacroAssembler-none.h	2016-11-15 23:25:35.000000000 +0000
+++ mozilla-central-79feeed42933/js/src/jit/none/MacroAssembler-none.h	2016-11-16 06:31:24.000000000 +0000
@@ -425,6 +425,10 @@
     Address ToPayload(Address) { MOZ_CRASH(); }
     Address ToType(Address) { MOZ_CRASH(); }
 #endif
+
+    struct AutoPrepareForPatching {
+        explicit AutoPrepareForPatching(MacroAssemblerNone&) {}
+    };
 };
 
 typedef MacroAssemblerNone MacroAssemblerSpecific;
diff -ur mozilla-central-79feeed42933.orig/mfbt/double-conversion/utils.h mozilla-central-79feeed42933/mfbt/double-conversion/utils.h
--- mozilla-central-79feeed42933.orig/mfbt/double-conversion/utils.h	2016-11-15 23:25:35.000000000 +0000
+++ mozilla-central-79feeed42933/mfbt/double-conversion/utils.h	2016-11-16 05:40:50.000000000 +0000
@@ -60,7 +60,8 @@
     defined(__sparc__) || defined(__sparc) || defined(__s390__) || \
     defined(__SH4__) || defined(__alpha__) || \
     defined(_MIPS_ARCH_MIPS32R2) || \
-    defined(__AARCH64EL__) || defined(__aarch64__)
+    defined(__AARCH64EL__) || defined(__aarch64__) || \
+    defined(__riscv)
 #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
 #elif defined(_M_IX86) || defined(__i386__) || defined(__i386)
 #if defined(_WIN32)
diff -ur mozilla-central-79feeed42933.orig/mfbt/tests/TestPoisonArea.cpp mozilla-central-79feeed42933/mfbt/tests/TestPoisonArea.cpp
--- mozilla-central-79feeed42933.orig/mfbt/tests/TestPoisonArea.cpp	2016-11-15 23:25:35.000000000 +0000
+++ mozilla-central-79feeed42933/mfbt/tests/TestPoisonArea.cpp	2016-11-16 05:59:02.000000000 +0000
@@ -157,6 +157,9 @@
 #elif defined __aarch64__
 #define RETURN_INSTR 0xd65f03c0 /* ret */
 
+#elif defined __riscv
+#define RETURN_INSTR 0x8067 /* ret aka jalr zero, 0(ra) */
+
 #elif defined __ia64
 struct ia64_instr { uint32_t mI[4]; };
 static const ia64_instr _return_instr =
diff -ur mozilla-central-79feeed42933.orig/python/mozbuild/mozbuild/configure/constants.py mozilla-central-79feeed42933/python/mozbuild/mozbuild/configure/constants.py
--- mozilla-central-79feeed42933.orig/python/mozbuild/mozbuild/configure/constants.py	2016-11-15 23:25:35.000000000 +0000
+++ mozilla-central-79feeed42933/python/mozbuild/mozbuild/configure/constants.py	2016-11-16 05:12:14.000000000 +0000
@@ -48,6 +48,8 @@
     'mips64': 64,
     'ppc': 32,
     'ppc64': 64,
+    'riscv32': 32,
+    'riscv64': 64,
     's390': 32,
     's390x': 64,
     'sparc': 32,
@@ -79,6 +81,8 @@
     ('s390', '__s390__'),
     ('ppc64', '__powerpc64__'),
     ('ppc', '__powerpc__'),
+    ('riscv64', '__riscv64'),
+    ('riscv32', '__riscv32'),
     ('Alpha', '__alpha__'),
     ('hppa', '__hppa__'),
     ('sparc64', '__sparc__ && __arch64__'),
diff -ur mozilla-central-79feeed42933.orig/python/mozbuild/mozbuild/test/configure/test_toolchain_configure.py mozilla-central-79feeed42933/python/mozbuild/mozbuild/test/configure/test_toolchain_configure.py
--- mozilla-central-79feeed42933.orig/python/mozbuild/mozbuild/test/configure/test_toolchain_configure.py	2016-11-15 23:25:35.000000000 +0000
+++ mozilla-central-79feeed42933/python/mozbuild/mozbuild/test/configure/test_toolchain_configure.py	2016-11-16 05:14:16.000000000 +0000
@@ -1024,6 +1024,12 @@
         'mips-unknown-linux-gnu': big_endian + {
             '__mips__': 1,
         },
+        'riscv64-unknown-linux-gnu': little_endian + {
+            '__riscv64': 1,
+        },
+        'riscv32-unknown-linux-gnu': little_endian + {
+            '__riscv32': 1,
+        },
     }
 
     PLATFORMS['powerpc64le-unknown-linux-gnu'] = \