package/gcc: add support for gcc 7

Remove upstream patches:

831-ARM-PR-target-70473-Reduce-size-of-Cortex-A8-automat.patch

870-xtensa-Fix-PR-target-78118.patch

871-xtensa-Fix-PR-target-78603.patch

890-fix-m68k-compile.patch:
https://github.com/gcc-mirror/gcc/commit/1701058da920d27de87dc82e8d327b8ca930e997

892-libgcc-mkmap-symver-support-skip_underscore.patch:
https://github.com/gcc-mirror/gcc/commit/6c8f362e1f17cce05131eb8ff53963d64bc69484

893-libgcc-config-bfin-use-the-generic-linker-version-in.patch:
https://github.com/gcc-mirror/gcc/commit/966d046c08ba50fc988ac614f84f2d49c1546e28

894-libgcc-fix-DWARF-compilation-with-FDPIC-targets.patch:
https://github.com/gcc-mirror/gcc/commit/397d0e43abb943f1fe57801220e7e46bc6636c7c

895-bfin-define-REENTRANT.patch:
https://github.com/gcc-mirror/gcc/commit/da89a4dcdf75bc3134f73520535c949bbbb0c845

940-uclinux-enable-threads.patch:
https://github.com/gcc-mirror/gcc/commit/b9ce54109ec78d18f6123a1e54aae1293bede716

941-mips-Add-support-for-mips-r6-musl.patch:
https://github.com/gcc-mirror/gcc/commit/83717065090bb8b954556d1216dd9dc397dc0243

Remove obsolete patches:

301-missing-execinfo_h.patch: boehm-gc removed from gcc sources:
https://github.com/gcc-mirror/gcc/commit/baf71228766058f5541d929891237d394376c975

830-arm_unbreak_armv4t.patch: SUBTARGET_CPU_DEFAULT removed:
https://github.com/gcc-mirror/gcc/commit/ff3caa3ade14a42d5ab7e81cbd3605fe15aa998d

Add a new patch to allow to build gcc 7.1 without extracting gcc/testsuite
directory.

This new gcc version require a kernel patch [1] to avoid a build issue with
____ilog2_NaN symbol. The following kernel version contain contain already
this patch :
4.11, 4.10.6, 4.9.18, 4.4.57, 3.18.50 and 3.12.73.

To build a toolchain based on gcc 7 and uClibc-ng 1.0.24, the patch [2] is
required to avoid a build issue due to missing aligned_alloc() definition.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=474c90156c8dcc2fa815e6716cc9394d7930cb9c
[2] https://cgit.openadk.org/cgi/cgit/uclibc-ng.git/commit/?id=5b0f49037e8ea8500b05c8f31ee88529ccac4cee

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Tested-by: Theodore Ateba <tf.ateba@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/gcc/7.1.0/0100-uclibc-conf.patch

@@ -0,0 +1,29 @@
+From 326b880b20e5f8187dbda736b4c4c662cbfb00ca Mon Sep 17 00:00:00 2001
+From: Romain Naour <romain.naour@gmail.com>
+Date: Tue, 2 May 2017 22:36:15 +0200
+Subject: [PATCH] uclibc-conf
+
+[Romain: convert to git patch]
+Signed-off-by: Romain Naour <romain.naour@gmail.com>
+---
+ contrib/regression/objs-gcc.sh | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/contrib/regression/objs-gcc.sh b/contrib/regression/objs-gcc.sh
+index 60b0497..6dc7ead 100755
+--- a/contrib/regression/objs-gcc.sh
++++ b/contrib/regression/objs-gcc.sh
+@@ -106,6 +106,10 @@ if [ $H_REAL_TARGET = $H_REAL_HOST -a $H_REAL_TARGET = i686-pc-linux-gnu ]
+  then
+   make all-gdb all-dejagnu all-ld || exit 1
+   make install-gdb install-dejagnu install-ld || exit 1
++elif [ $H_REAL_TARGET = $H_REAL_HOST -a $H_REAL_TARGET = i686-pc-linux-uclibc ]
++ then
++  make all-gdb all-dejagnu all-ld || exit 1
++  make install-gdb install-dejagnu install-ld || exit 1
+ elif [ $H_REAL_TARGET = $H_REAL_HOST ] ; then
+   make bootstrap || exit 1
+   make install || exit 1
+-- 
+2.9.3
+

package/gcc/7.1.0/0810-arm-softfloat-libgcc.patch

@@ -0,0 +1,45 @@
+From 420a304ac0daa29d66da6ed5b0b49fc4c482d522 Mon Sep 17 00:00:00 2001
+From: Romain Naour <romain.naour@gmail.com>
+Date: Tue, 2 May 2017 22:46:18 +0200
+Subject: [PATCH] arm softfloat libgcc
+
+[Romain: convert to git patch]
+Signed-off-by: Romain Naour <romain.naour@gmail.com>
+---
+ gcc/config/arm/linux-elf.h | 2 +-
+ libgcc/config/arm/t-linux  | 7 ++++++-
+ 2 files changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/gcc/config/arm/linux-elf.h b/gcc/config/arm/linux-elf.h
+index 3d62367..dad0b97 100644
+--- a/gcc/config/arm/linux-elf.h
++++ b/gcc/config/arm/linux-elf.h
+@@ -58,7 +58,7 @@
+    %{shared:-lc} \
+    %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
+ 
+-#define LIBGCC_SPEC "%{mfloat-abi=soft*:-lfloat} -lgcc"
++#define LIBGCC_SPEC "-lgcc"
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
+ 
+diff --git a/libgcc/config/arm/t-linux b/libgcc/config/arm/t-linux
+index 3d520de..e7bc042 100644
+--- a/libgcc/config/arm/t-linux
++++ b/libgcc/config/arm/t-linux
+@@ -1,6 +1,11 @@
+ LIB1ASMSRC = arm/lib1funcs.S
+ LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx _clzsi2 _clzdi2 \
+-	_ctzsi2 _arm_addsubdf3 _arm_addsubsf3
++	_ctzsi2 _arm_addsubdf3 _arm_addsubsf3 \
++	_arm_addsubdf3 _arm_addsubsf3 \
++	_arm_negdf2 _arm_muldivdf3 _arm_cmpdf2 _arm_unorddf2 \
++	_arm_fixdfsi _arm_fixunsdfsi _arm_truncdfsf2 \
++	_arm_negsf2 _arm_muldivsf3 _arm_cmpsf2 _arm_unordsf2 \
++	_arm_fixsfsi _arm_fixunssfsi
+ 
+ # Just for these, we omit the frame pointer since it makes such a big
+ # difference.
+-- 
+2.9.3
+

package/gcc/7.1.0/0860-cilk-fix-build-without-wchar.patch

@@ -0,0 +1,64 @@
+From 714739e69ead1d9823233af40645277f6d4633ea Mon Sep 17 00:00:00 2001
+From: Peter Korsgaard <peter@korsgaard.com>
+Date: Tue, 2 May 2017 23:21:46 +0200
+Subject: [PATCH] cilk: fix build without wchar
+
+When building against uClibc with wchar support disabled, WCHAR_MIN and
+WCHAR_MAX are not defined leading to compilation errors.
+
+Fix it by only including the wchar code if available.
+
+Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
+[Romain: convert to git patch]
+Signed-off-by: Romain Naour <romain.naour@gmail.com>
+---
+ libcilkrts/include/cilk/reducer_min_max.h | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/libcilkrts/include/cilk/reducer_min_max.h b/libcilkrts/include/cilk/reducer_min_max.h
+index 641aa82..4f8e010 100644
+--- a/libcilkrts/include/cilk/reducer_min_max.h
++++ b/libcilkrts/include/cilk/reducer_min_max.h
+@@ -3289,7 +3289,9 @@ __CILKRTS_BEGIN_EXTERN_C
+ CILK_C_REDUCER_MAX_INSTANCE(char,               char,       CHAR_MIN)
+ CILK_C_REDUCER_MAX_INSTANCE(unsigned char,      uchar,      0)
+ CILK_C_REDUCER_MAX_INSTANCE(signed char,        schar,      SCHAR_MIN)
++#ifdef WCHAR_MIN
+ CILK_C_REDUCER_MAX_INSTANCE(wchar_t,            wchar_t,    WCHAR_MIN)
++#endif
+ CILK_C_REDUCER_MAX_INSTANCE(short,              short,      SHRT_MIN)
+ CILK_C_REDUCER_MAX_INSTANCE(unsigned short,     ushort,     0)
+ CILK_C_REDUCER_MAX_INSTANCE(int,                int,        INT_MIN)
+@@ -3441,7 +3443,9 @@ __CILKRTS_BEGIN_EXTERN_C
+ CILK_C_REDUCER_MAX_INDEX_INSTANCE(char,               char,       CHAR_MIN)
+ CILK_C_REDUCER_MAX_INDEX_INSTANCE(unsigned char,      uchar,      0)
+ CILK_C_REDUCER_MAX_INDEX_INSTANCE(signed char,        schar,      SCHAR_MIN)
++#ifdef WCHAR_MIN
+ CILK_C_REDUCER_MAX_INDEX_INSTANCE(wchar_t,            wchar_t,    WCHAR_MIN)
++#endif
+ CILK_C_REDUCER_MAX_INDEX_INSTANCE(short,              short,      SHRT_MIN)
+ CILK_C_REDUCER_MAX_INDEX_INSTANCE(unsigned short,     ushort,     0)
+ CILK_C_REDUCER_MAX_INDEX_INSTANCE(int,                int,        INT_MIN)
+@@ -3567,7 +3571,9 @@ __CILKRTS_BEGIN_EXTERN_C
+ CILK_C_REDUCER_MIN_INSTANCE(char,               char,       CHAR_MAX)
+ CILK_C_REDUCER_MIN_INSTANCE(unsigned char,      uchar,      CHAR_MAX)
+ CILK_C_REDUCER_MIN_INSTANCE(signed char,        schar,      SCHAR_MAX)
++#ifdef WCHAR_MAX
+ CILK_C_REDUCER_MIN_INSTANCE(wchar_t,            wchar_t,    WCHAR_MAX)
++#endif
+ CILK_C_REDUCER_MIN_INSTANCE(short,              short,      SHRT_MAX)
+ CILK_C_REDUCER_MIN_INSTANCE(unsigned short,     ushort,     USHRT_MAX)
+ CILK_C_REDUCER_MIN_INSTANCE(int,                int,        INT_MAX)
+@@ -3719,7 +3725,9 @@ __CILKRTS_BEGIN_EXTERN_C
+ CILK_C_REDUCER_MIN_INDEX_INSTANCE(char,               char,       CHAR_MAX)
+ CILK_C_REDUCER_MIN_INDEX_INSTANCE(unsigned char,      uchar,      CHAR_MAX)
+ CILK_C_REDUCER_MIN_INDEX_INSTANCE(signed char,        schar,      SCHAR_MAX)
++#ifdef WCHAR_MAX
+ CILK_C_REDUCER_MIN_INDEX_INSTANCE(wchar_t,            wchar_t,    WCHAR_MAX)
++#endif
+ CILK_C_REDUCER_MIN_INDEX_INSTANCE(short,              short,      SHRT_MAX)
+ CILK_C_REDUCER_MIN_INDEX_INSTANCE(unsigned short,     ushort,     USHRT_MAX)
+ CILK_C_REDUCER_MIN_INDEX_INSTANCE(int,                int,        INT_MAX)
+-- 
+2.9.3
+

package/gcc/7.1.0/0891-fix-m68k-uclinux.patch

@@ -0,0 +1,30 @@
+From c2773170a1b0e2728f71f2275a99fd177ba2cef4 Mon Sep 17 00:00:00 2001
+From: Romain Naour <romain.naour@gmail.com>
+Date: Tue, 2 May 2017 23:25:17 +0200
+Subject: [PATCH] fix m68k uclinux avoids internal compiler error while
+ compiling linux-atomic.c See here:
+ https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53833
+
+Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
+[Romain: convert to git patch]
+Signed-off-by: Romain Naour <romain.naour@gmail.com>
+---
+ libgcc/config.host | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/libgcc/config.host b/libgcc/config.host
+index b279a64..04fe183 100644
+--- a/libgcc/config.host
++++ b/libgcc/config.host
+@@ -820,7 +820,7 @@ m68k*-*-netbsdelf*)
+ m68k*-*-openbsd*)
+ 	;;
+ m68k-*-uclinux*)	# Motorola m68k/ColdFire running uClinux with uClibc
+-	tmake_file="$tmake_file m68k/t-floatlib m68k/t-linux"
++	tmake_file="$tmake_file m68k/t-floatlib"
+ 	md_unwind_header=m68k/linux-unwind.h
+ 	;;
+ m68k-*-linux*)			# Motorola m68k's running GNU/Linux
+-- 
+2.9.3
+

package/gcc/7.1.0/0900-remove-selftests.patch

@@ -0,0 +1,111 @@
+From 63f0917d90eb83d267dc517fdfb6523a74b1917c Mon Sep 17 00:00:00 2001
+From: Romain Naour <romain.naour@gmail.com>
+Date: Wed, 3 May 2017 00:37:06 +0200
+Subject: [PATCH] remove selftests
+
+When the gcc archive is extracted by the gcc.mk, the gcc/testsuite
+is excluded:
+
+HOST_GCC_EXCLUDES = \
+	libjava/* libgo/* \
+	gcc/testsuite/* libstdc++-v3/testsuite/*
+
+The new Makefile target from the "Selftest framework" [1] added a dependency
+on the gcc/testsuite/Makefile.
+Revert partially the commit [1] to allow building gcc without selftest.
+
+[1] https://github.com/gcc-mirror/gcc/commit/99b4f3a2d5bf2c137de9731e27b483eb6b462fd9
+
+Signed-off-by: Romain Naour <romain.naour@gmail.com>
+---
+ gcc/Makefile.in | 46 +++++-----------------------------------------
+ 1 file changed, 5 insertions(+), 41 deletions(-)
+
+diff --git a/gcc/Makefile.in b/gcc/Makefile.in
+index 74d1912..652a554 100644
+--- a/gcc/Makefile.in
++++ b/gcc/Makefile.in
+@@ -1581,14 +1581,13 @@ OBJS = \
+ OBJS-libcommon = diagnostic.o diagnostic-color.o diagnostic-show-locus.o \
+ 	edit-context.o \
+ 	pretty-print.o intl.o \
+-	vec.o input.o version.o hash-table.o ggc-none.o memory-block.o \
+-	selftest.o
++	vec.o input.o version.o hash-table.o ggc-none.o memory-block.o
+ 
+ # Objects in libcommon-target.a, used by drivers and by the core
+ # compiler and containing target-dependent code.
+ OBJS-libcommon-target = $(common_out_object_file) prefix.o params.o \
+ 	opts.o opts-common.o options.o vec.o hooks.o common/common-targhooks.o \
+-	hash-table.o file-find.o spellcheck.o selftest.o
++	hash-table.o file-find.o spellcheck.o
+ 
+ # This lists all host objects for the front ends.
+ ALL_HOST_FRONTEND_OBJS = $(foreach v,$(CONFIG_LANGUAGES),$($(v)_OBJS))
+@@ -1865,10 +1864,10 @@ config.status: $(srcdir)/configure $(srcdir)/config.gcc
+ quickstrap: all
+ 	cd $(toplevel_builddir) && $(MAKE) all-target-libgcc
+ 
+-all.internal: start.encap rest.encap doc selftest
++all.internal: start.encap rest.encap doc
+ # This is what to compile if making a cross-compiler.
+ all.cross: native gcc-cross$(exeext) cpp$(exeext) specs \
+-	libgcc-support lang.all.cross doc selftest @GENINSRC@ srcextra
++	libgcc-support lang.all.cross doc @GENINSRC@ srcextra
+ # This is what must be made before installing GCC and converting libraries.
+ start.encap: native xgcc$(exeext) cpp$(exeext) specs \
+ 	libgcc-support lang.start.encap @GENINSRC@ srcextra
+@@ -1888,41 +1887,6 @@ endif
+ # This does the things that can't be done on the host machine.
+ rest.cross: specs
+ 
+-# GCC's selftests.
+-# Specify a dummy input file to placate the driver.
+-# Specify -nostdinc to work around missing WIND_BASE environment variable
+-# required for *-wrs-vxworks-* targets.
+-# Specify -o /dev/null so the output of -S is discarded. More importantly
+-# It does not try to create a file with the name "null.s" on POSIX and
+-# "nul.s" on Windows. Because on Windows "nul" is a reserved file name.
+-# Specify the path to gcc/testsuite/selftests within the srcdir
+-# as an argument to -fself-test.
+-SELFTEST_FLAGS = -nostdinc -x c /dev/null -S -o /dev/null \
+-	-fself-test=$(srcdir)/testsuite/selftests
+-
+-# Run the selftests during the build once we have a driver and a cc1,
+-# so that self-test failures are caught as early as possible.
+-# Use "s-selftest" to ensure that we only run the selftests if the
+-# driver, cc1, or selftest data change.
+-.PHONY: selftest
+-selftest: s-selftest
+-s-selftest: $(GCC_PASSES) cc1$(exeext) stmp-int-hdrs \
+-  $(srcdir)/testsuite/selftests
+-	$(GCC_FOR_TARGET) $(SELFTEST_FLAGS)
+-	$(STAMP) $@
+-
+-# Convenience method for running selftests under gdb:
+-.PHONY: selftest-gdb
+-selftest-gdb: $(GCC_PASSES) cc1$(exeext) stmp-int-hdrs
+-	$(GCC_FOR_TARGET) $(SELFTEST_FLAGS) \
+-	  -wrapper gdb,--args
+-
+-# Convenience method for running selftests under valgrind:
+-.PHONY: selftest-valgrind
+-selftest-valgrind: $(GCC_PASSES) cc1$(exeext) stmp-int-hdrs
+-	$(GCC_FOR_TARGET) $(SELFTEST_FLAGS) \
+-	  -wrapper valgrind,--leak-check=full
+-
+ # Recompile all the language-independent object files.
+ # This is used only if the user explicitly asks for it.
+ compilations: $(BACKEND)
+@@ -2076,7 +2040,7 @@ gcc-nm.c: gcc-ar.c
+ 	cp $^ $@
+ 
+ COLLECT2_OBJS = collect2.o collect2-aix.o tlink.o vec.o ggc-none.o \
+-  collect-utils.o file-find.o hash-table.o selftest.o
++  collect-utils.o file-find.o hash-table.o
+ COLLECT2_LIBS = @COLLECT2_LIBS@
+ collect2$(exeext): $(COLLECT2_OBJS) $(LIBDEPS)
+ # Don't try modifying collect2 (aka ld) in place--it might be linking this.
+-- 
+2.9.3
+

package/gcc/Config.in.host

@@ -87,6 +87,16 @@ config BR2_GCC_VERSION_6_X
 	depends on !BR2_mips_m6250 && !BR2_mips_p6600
 	select BR2_TOOLCHAIN_GCC_AT_LEAST_6
 
+config BR2_GCC_VERSION_7_X
+	bool "gcc 7.x"
+	# Broken or unsupported architectures
+	depends on !BR2_arc
+	depends on !BR2_microblaze
+	depends on !BR2_or1k
+	# Unsupported MIPS cores
+	depends on !BR2_mips_m6250 && !BR2_mips_p6600
+	select BR2_TOOLCHAIN_GCC_AT_LEAST_7
+
 endchoice
 
 # Indicates if GCC for architecture supports --with-{arch,cpu,..}  to
@@ -106,6 +116,7 @@ config BR2_GCC_VERSION
 	default "4.9.4"     if BR2_GCC_VERSION_4_9_X
 	default "5.4.0"     if BR2_GCC_VERSION_5_X
 	default "6.3.0"     if BR2_GCC_VERSION_6_X
+	default "7.1.0"     if BR2_GCC_VERSION_7_X
 	default "arc-2017.03-rc1" if BR2_GCC_VERSION_ARC
 	default "musl-5.4.0" if BR2_GCC_VERSION_OR1K
 

package/gcc/gcc.hash

@@ -10,6 +10,8 @@ sha512  93abb78e16277454f41a8e9810f41f66c0fdffdc539a762ff6b67d3037f78db971378683
 sha512  2941cc950c8f2409a314df497631f9b0266211aa74746c1839c46e04f1c7c299afe2528d1ef16ea39def408a644ba48f97519ec7a7dd37d260c3e9423514265b  gcc-5.4.0.tar.bz2
 # From ftp://gcc.gnu.org/pub/gcc/releases/gcc-6.3.0/sha512.sum
 sha512  234dd9b1bdc9a9c6e352216a7ef4ccadc6c07f156006a59759c5e0e6a69f0abcdc14630eff11e3826dd6ba5933a8faa43043f3d1d62df6bd5ab1e82862f9bf78  gcc-6.3.0.tar.bz2
+# From ftp://gcc.gnu.org/pub/gcc/releases/gcc-7.1.0/sha512.sum
+sha512  b5d952be9a10f0e0926bb2868877d10544039d6d2f35ba0a08f51231dd622a007650764a03e173194701467547789ad7d2d9cbc10adcdf118d619cdedbd14aec  gcc-7.1.0.tar.bz2
 
 # Locally calculated (fetched from Github)
 sha512  e4fe5a179b8feabf932a8a6f4794ff6907b868a65487412d855a4b3671aa24ec8544a44f3b63e69ea2c12fcd4d8028d0619d40bf016ee7c1a5b5a99aa9315ef3  gcc-arc-2017.03-rc1.tar.gz

toolchain/toolchain-common.in

@@ -320,10 +320,15 @@ config BR2_TOOLCHAIN_GCC_AT_LEAST_6
 	bool
 	select BR2_TOOLCHAIN_GCC_AT_LEAST_5
 
+config BR2_TOOLCHAIN_GCC_AT_LEAST_7
+	bool
+	select BR2_TOOLCHAIN_GCC_AT_LEAST_6
+
 # This order guarantees that the highest version is set, as kconfig
 # stops affecting a value on the first matching default.
 config BR2_TOOLCHAIN_GCC_AT_LEAST
 	string
+	default "7"	if BR2_TOOLCHAIN_GCC_AT_LEAST_7
 	default "6"	if BR2_TOOLCHAIN_GCC_AT_LEAST_6
 	default "5"	if BR2_TOOLCHAIN_GCC_AT_LEAST_5
 	default "4.9"	if BR2_TOOLCHAIN_GCC_AT_LEAST_4_9

toolchain/toolchain-external/toolchain-external-custom/Config.in.options

@@ -23,6 +23,10 @@ choice
 	  Set to the gcc version that is used by your external
 	  toolchain.
 
+config BR2_TOOLCHAIN_EXTERNAL_GCC_7
+	bool "7.x"
+	select BR2_TOOLCHAIN_GCC_AT_LEAST_7
+
 config BR2_TOOLCHAIN_EXTERNAL_GCC_6
 	bool "6.x"
 	select BR2_TOOLCHAIN_GCC_AT_LEAST_6