toolchain: gcc: update 7.x to 7.2.0

Bump gcc from 7.1 to 7.2

Compile & run tested: ar71xx

Trace history of current patches and update with commit ref & comment
to give more clue as to why they're still around/needed.  Some have
changed form since the original commit but some clue is better than no
clue at all.

Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
Tested-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

25 files changed, 278 insertions, 72 deletions

diff --git a/toolchain/gcc/patches/7.1.0/230-musl_libssp.patch b/toolchain/gcc/patches/7.1.0/230-musl_libssp.patch
deleted file mode 100644
index 65b5710d6f..0000000000
--- a/toolchain/gcc/patches/7.1.0/230-musl_libssp.patch
+++ /dev/null
@@ -1,13 +0,0 @@
---- a/gcc/gcc.c
-+++ b/gcc/gcc.c
-@@ -861,7 +861,9 @@ proper position among the other output f
- #endif
- 
- #ifndef LINK_SSP_SPEC
--#ifdef TARGET_LIBC_PROVIDES_SSP
-+#if DEFAULT_LIBC == LIBC_MUSL
-+#define LINK_SSP_SPEC "-lssp_nonshared"
-+#elif defined(TARGET_LIBC_PROVIDES_SSP)
- #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
- 		       "|fstack-protector-strong|fstack-protector-explicit:}"
- #else
diff --git a/toolchain/gcc/patches/7.1.0/800-arm_v5te_no_ldrd_strd.patch b/toolchain/gcc/patches/7.1.0/800-arm_v5te_no_ldrd_strd.patch
deleted file mode 100644
index 435f5715b5..0000000000
--- a/toolchain/gcc/patches/7.1.0/800-arm_v5te_no_ldrd_strd.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- a/gcc/config/arm/arm.h
-+++ b/gcc/config/arm/arm.h
-@@ -150,7 +150,7 @@ extern tree arm_fp16_type_node;
- /* Thumb-1 only.  */
- #define TARGET_THUMB1_ONLY		(TARGET_THUMB1 && !arm_arch_notm)
- 
--#define TARGET_LDRD			(arm_arch5e && ARM_DOUBLEWORD_ALIGN \
-+#define TARGET_LDRD			(arm_arch6 && ARM_DOUBLEWORD_ALIGN \
-                                          && !TARGET_THUMB1)
- 
- #define TARGET_CRC32			(arm_arch_crc)
diff --git a/toolchain/gcc/patches/7.1.0/870-ppc_no_crtsavres.patch b/toolchain/gcc/patches/7.1.0/870-ppc_no_crtsavres.patch
deleted file mode 100644
index 332b8b62a6..0000000000
--- a/toolchain/gcc/patches/7.1.0/870-ppc_no_crtsavres.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- a/gcc/config/rs6000/rs6000.c
-+++ b/gcc/config/rs6000/rs6000.c
-@@ -26889,7 +26889,7 @@ rs6000_savres_strategy (rs6000_stack_t *
-   /* Define cutoff for using out-of-line functions to save registers.  */
-   if (DEFAULT_ABI == ABI_V4 || TARGET_ELF)
-     {
--      if (!optimize_size)
-+      if (1)
- 	{
- 	  strategy |= SAVE_INLINE_FPRS | REST_INLINE_FPRS;
- 	  strategy |= SAVE_INLINE_GPRS | REST_INLINE_GPRS;
diff --git a/toolchain/gcc/patches/7.1.0/881-no_tm_section.patch b/toolchain/gcc/patches/7.1.0/881-no_tm_section.patch
deleted file mode 100644
index fab5db3be5..0000000000
--- a/toolchain/gcc/patches/7.1.0/881-no_tm_section.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- a/libgcc/crtstuff.c
-+++ b/libgcc/crtstuff.c
-@@ -152,7 +152,7 @@ call_ ## FUNC (void)					\
- #endif
- 
- #if !defined(USE_TM_CLONE_REGISTRY) && defined(OBJECT_FORMAT_ELF)
--# define USE_TM_CLONE_REGISTRY 1
-+# define USE_TM_CLONE_REGISTRY 0
- #endif
- 
- /* We do not want to add the weak attribute to the declarations of these
diff --git a/toolchain/gcc/patches/7.1.0/900-bad-mips16-crt.patch b/toolchain/gcc/patches/7.1.0/900-bad-mips16-crt.patch
deleted file mode 100644
index dd6e9dc889..0000000000
--- a/toolchain/gcc/patches/7.1.0/900-bad-mips16-crt.patch
+++ /dev/null
@@ -1,9 +0,0 @@
---- a/libgcc/config/mips/t-mips16
-+++ b/libgcc/config/mips/t-mips16
-@@ -43,3 +43,6 @@ SYNC_CFLAGS = -mno-mips16
- 
- # Version these symbols if building libgcc.so.
- SHLIB_MAPFILES += $(srcdir)/config/mips/libgcc-mips16.ver
-+
-+CRTSTUFF_T_CFLAGS += -mno-mips16
-+CRTSTUFF_T_CFLAGS_S += -mno-mips16
diff --git a/toolchain/gcc/patches/7.1.0/940-no-clobber-stamp-bits.patch b/toolchain/gcc/patches/7.1.0/940-no-clobber-stamp-bits.patch
deleted file mode 100644
index 9e5e59970e..0000000000
--- a/toolchain/gcc/patches/7.1.0/940-no-clobber-stamp-bits.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- a/libstdc++-v3/include/Makefile.in
-+++ b/libstdc++-v3/include/Makefile.in
-@@ -1475,7 +1475,7 @@ stamp-bits: ${bits_headers}
- 	@$(STAMP) stamp-bits
- 
- stamp-bits-sup: stamp-bits ${bits_sup_headers}
--	@-cd ${bits_builddir} && $(LN_S) $? . 2>/dev/null
-+	@-cd ${bits_builddir} && $(LN_S) $(filter-out stamp-bits,$?) . 2>/dev/null
- 	@$(STAMP) stamp-bits-sup
- 
- stamp-c_base: ${c_base_headers}
diff --git a/toolchain/gcc/patches/7.1.0/001-revert_register_mode_search.patch b/toolchain/gcc/patches/7.2.0/001-revert_register_mode_search.patch
index adcc7c3c54..63e3fee003 100644
--- a/toolchain/gcc/patches/7.1.0/001-revert_register_mode_search.patch
+++ b/toolchain/gcc/patches/7.2.0/001-revert_register_mode_search.patch
@@ -1,3 +1,15 @@
+commit 31285a20390a5e53a74a2a71d1b5c82f366ddd5a
+Author: Felix Fietkau <nbd@openwrt.org>
+Date:   Tue May 6 11:49:05 2014 +0000
+
+    gcc: revert an upstream patch that is causing a regression on powerpc
+    
+    https://forum.openwrt.org/viewtopic.php?pid=232494#p232494
+    
+    Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+    
+    SVN-Revision: 40709
+
 Revert of:
 
 commit 275035b56823b26d5fb7e90fad945b998648edf2
diff --git a/toolchain/gcc/patches/7.1.0/002-case_insensitive.patch b/toolchain/gcc/patches/7.2.0/002-case_insensitive.patch
index b3d2dbe291..3442076d7d 100644
--- a/toolchain/gcc/patches/7.1.0/002-case_insensitive.patch
+++ b/toolchain/gcc/patches/7.2.0/002-case_insensitive.patch
@@ -1,3 +1,13 @@
+commit 81cc26c706b2bc8c8c1eb1a322e5c5157900836e
+Author: Felix Fietkau <nbd@openwrt.org>
+Date:   Sun Oct 19 21:45:51 2014 +0000
+
+    gcc: do not assume that the Mac OS X filesystem is case insensitive
+    
+    Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+    
+    SVN-Revision: 42973
+
 --- a/include/filenames.h
 +++ b/include/filenames.h
 @@ -43,11 +43,6 @@ extern "C" {
diff --git a/toolchain/gcc/patches/7.1.0/010-documentation.patch b/toolchain/gcc/patches/7.2.0/010-documentation.patch
index 46fe81f129..0106814f41 100644
--- a/toolchain/gcc/patches/7.1.0/010-documentation.patch
+++ b/toolchain/gcc/patches/7.2.0/010-documentation.patch
@@ -1,6 +1,18 @@
+commit 098bd91f5eae625c7d2ee621e10930fc4434e5e2
+Author: Luka Perkov <luka@openwrt.org>
+Date:   Tue Feb 26 16:16:33 2013 +0000
+
+    gcc: don't build documentation
+    
+    This closes #13039.
+    
+    Signed-off-by: Luka Perkov <luka@openwrt.org>
+    
+    SVN-Revision: 35807
+
 --- a/gcc/Makefile.in
 +++ b/gcc/Makefile.in
-@@ -3120,18 +3120,10 @@ doc/gcc.info: $(TEXI_GCC_FILES)
+@@ -3121,18 +3121,10 @@ doc/gcc.info: $(TEXI_GCC_FILES)
  doc/gccint.info: $(TEXI_GCCINT_FILES)
  doc/cppinternals.info: $(TEXI_CPPINT_FILES)
  
diff --git a/toolchain/gcc/patches/7.2.0/230-musl_libssp.patch b/toolchain/gcc/patches/7.2.0/230-musl_libssp.patch
new file mode 100644
index 0000000000..eebee9175c
--- /dev/null
+++ b/toolchain/gcc/patches/7.2.0/230-musl_libssp.patch
@@ -0,0 +1,28 @@
+commit 1877bc9d8f2be143fbe530347a945850d0ecd234
+Author: Steven Barth <cyrus@openwrt.org>
+Date:   Mon Jun 22 10:31:07 2015 +0000
+
+    gcc/musl: rework SSP-support
+    
+    Make musl provide libssp_nonshared.a and make GCC link it unconditionally
+    if musl is used. This should be a no-op if SSP is disabled and seems to be
+    the only reliable way of dealing with SSP over all packages due to the mess
+    that is linkerflags handling in packages.
+    
+    Signed-off-by: Steven Barth <steven@midlink.org>
+    
+    SVN-Revision: 46108
+
+--- a/gcc/gcc.c
++++ b/gcc/gcc.c
+@@ -861,7 +861,9 @@ proper position among the other output f
+ #endif
+ 
+ #ifndef LINK_SSP_SPEC
+-#ifdef TARGET_LIBC_PROVIDES_SSP
++#if DEFAULT_LIBC == LIBC_MUSL
++#define LINK_SSP_SPEC "-lssp_nonshared"
++#elif defined(TARGET_LIBC_PROVIDES_SSP)
+ #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
+ 		       "|fstack-protector-strong|fstack-protector-explicit:}"
+ #else
diff --git a/toolchain/gcc/patches/7.1.0/300-mips_Os_cpu_rtx_cost_model.patch b/toolchain/gcc/patches/7.2.0/300-mips_Os_cpu_rtx_cost_model.patch
index 21cff871c0..84c0fdab66 100644
--- a/toolchain/gcc/patches/7.1.0/300-mips_Os_cpu_rtx_cost_model.patch
+++ b/toolchain/gcc/patches/7.2.0/300-mips_Os_cpu_rtx_cost_model.patch
@@ -1,3 +1,13 @@
+commit ecf7671b769fe96f7b5134be442089f8bdba55d2
+Author: Felix Fietkau <nbd@nbd.name>
+Date:   Thu Aug 4 20:29:45 2016 +0200
+
+gcc: add a patch to generate better code with Os on mips
+
+Also happens to reduce compressed code size a bit
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+
 --- a/gcc/config/mips/mips.c
 +++ b/gcc/config/mips/mips.c
 @@ -19784,7 +19784,7 @@ mips_option_override (void)
diff --git a/toolchain/gcc/patches/7.2.0/800-arm_v5te_no_ldrd_strd.patch b/toolchain/gcc/patches/7.2.0/800-arm_v5te_no_ldrd_strd.patch
new file mode 100644
index 0000000000..76200a1661
--- /dev/null
+++ b/toolchain/gcc/patches/7.2.0/800-arm_v5te_no_ldrd_strd.patch
@@ -0,0 +1,32 @@
+commit b050f87d13b5dc7ed82feb9a90f4529de58bdf25
+Author: Felix Fietkau <nbd@openwrt.org>
+Date:   Wed Feb 19 19:20:10 2014 +0000
+
+    gcc: prevent the use of LDRD/STRD on ARMv5TE
+    
+    These instructions are for 64-bit load/store. On ARMv5TE, the CPU
+    requires addresses to be aligned to 64-bit. When misaligned, behavior is
+    undefined (effectively either loads the same word twice on LDRD, or
+    corrupts surrounding memory on STRD).
+    
+    On ARMv6 and newer, unaligned access is safe.
+    
+    Removing these instructions for ARMv5TE is necessary, because GCC
+    ignores alignment information in pointers and does unsafe optimizations
+    that have shown up as bugs in various places.
+    
+    Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+    
+    SVN-Revision: 39638
+
+--- a/gcc/config/arm/arm.h
++++ b/gcc/config/arm/arm.h
+@@ -150,7 +150,7 @@ extern tree arm_fp16_type_node;
+ /* Thumb-1 only.  */
+ #define TARGET_THUMB1_ONLY		(TARGET_THUMB1 && !arm_arch_notm)
+ 
+-#define TARGET_LDRD			(arm_arch5e && ARM_DOUBLEWORD_ALIGN \
++#define TARGET_LDRD			(arm_arch6 && ARM_DOUBLEWORD_ALIGN \
+                                          && !TARGET_THUMB1)
+ 
+ #define TARGET_CRC32			(arm_arch_crc)
diff --git a/toolchain/gcc/patches/7.1.0/810-arm-softfloat-libgcc.patch b/toolchain/gcc/patches/7.2.0/810-arm-softfloat-libgcc.patch
index a437d81511..5c9d86aead 100644
--- a/toolchain/gcc/patches/7.1.0/810-arm-softfloat-libgcc.patch
+++ b/toolchain/gcc/patches/7.2.0/810-arm-softfloat-libgcc.patch
@@ -1,3 +1,11 @@
+commit 8570c4be394cff7282f332f97da2ff569a927ddb
+Author: Imre Kaloz <kaloz@openwrt.org>
+Date:   Wed Feb 2 20:06:12 2011 +0000
+
+    fixup arm soft-float symbols
+    
+    SVN-Revision: 25325
+
 --- a/libgcc/config/arm/t-linux
 +++ b/libgcc/config/arm/t-linux
 @@ -1,6 +1,10 @@
diff --git a/toolchain/gcc/patches/7.1.0/820-libgcc_pic.patch b/toolchain/gcc/patches/7.2.0/820-libgcc_pic.patch
index cd539d865c..0cc1e07e2b 100644
--- a/toolchain/gcc/patches/7.1.0/820-libgcc_pic.patch
+++ b/toolchain/gcc/patches/7.2.0/820-libgcc_pic.patch
@@ -1,3 +1,11 @@
+commit c96312958c0621e72c9b32da5bc224ffe2161384
+Author: Felix Fietkau <nbd@openwrt.org>
+Date:   Mon Oct 19 23:26:09 2009 +0000
+
+    gcc: create a proper libgcc_pic.a static library for relinking (4.3.3+ for now, backport will follow)
+    
+    SVN-Revision: 18086
+
 --- a/libgcc/Makefile.in
 +++ b/libgcc/Makefile.in
 @@ -920,11 +920,12 @@ $(libgcov-driver-objects): %$(objext): $
diff --git a/toolchain/gcc/patches/7.1.0/840-armv4_pass_fix-v4bx_to_ld.patch b/toolchain/gcc/patches/7.2.0/840-armv4_pass_fix-v4bx_to_ld.patch
index 9cae1c9d1c..b9c9b161ad 100644
--- a/toolchain/gcc/patches/7.1.0/840-armv4_pass_fix-v4bx_to_ld.patch
+++ b/toolchain/gcc/patches/7.2.0/840-armv4_pass_fix-v4bx_to_ld.patch
@@ -1,3 +1,12 @@
+commit 7edc8ca5456d9743dd0075eb3cc5b04f4f24c8cc
+Author: Imre Kaloz <kaloz@openwrt.org>
+Date:   Wed Feb 2 19:34:36 2011 +0000
+
+    add armv4 fixup patches
+    
+    SVN-Revision: 25322
+
+
 --- a/gcc/config/arm/linux-eabi.h
 +++ b/gcc/config/arm/linux-eabi.h
 @@ -88,10 +88,15 @@
diff --git a/toolchain/gcc/patches/7.1.0/850-use_shared_libgcc.patch b/toolchain/gcc/patches/7.2.0/850-use_shared_libgcc.patch
index 5d09d6e2d2..1d07efed80 100644
--- a/toolchain/gcc/patches/7.1.0/850-use_shared_libgcc.patch
+++ b/toolchain/gcc/patches/7.2.0/850-use_shared_libgcc.patch
@@ -1,3 +1,10 @@
+commit dcfc40358b5a3cae7320c17f8d1cebd5ad5540cd
+Author: Felix Fietkau <nbd@openwrt.org>
+Date:   Sun Feb 12 20:25:47 2012 +0000
+
+    gcc 4.6: port over the missing patch 850-use_shared_libgcc.patch to prevent libgcc crap from leaking into every single binary
+    
+    SVN-Revision: 30486
 --- a/gcc/config/arm/linux-eabi.h
 +++ b/gcc/config/arm/linux-eabi.h
 @@ -126,10 +126,6 @@
diff --git a/toolchain/gcc/patches/7.1.0/851-libgcc_no_compat.patch b/toolchain/gcc/patches/7.2.0/851-libgcc_no_compat.patch
index 80c3476841..d710e40717 100644
--- a/toolchain/gcc/patches/7.1.0/851-libgcc_no_compat.patch
+++ b/toolchain/gcc/patches/7.2.0/851-libgcc_no_compat.patch
@@ -1,3 +1,13 @@
+commit 64661de100da1ec1061ef3e5e400285dce115e6b
+Author: Felix Fietkau <nbd@openwrt.org>
+Date:   Sun May 10 13:16:35 2015 +0000
+
+    gcc: add some size optimization patches
+    
+    Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+    
+    SVN-Revision: 45664
+
 --- a/libgcc/config/t-libunwind
 +++ b/libgcc/config/t-libunwind
 @@ -2,8 +2,7 @@
diff --git a/toolchain/gcc/patches/7.2.0/870-ppc_no_crtsavres.patch b/toolchain/gcc/patches/7.2.0/870-ppc_no_crtsavres.patch
new file mode 100644
index 0000000000..156468b45e
--- /dev/null
+++ b/toolchain/gcc/patches/7.2.0/870-ppc_no_crtsavres.patch
@@ -0,0 +1,18 @@
+commit d8c570a1531035c3e26bcd94741e5f5b9c36b5d9
+Author: Felix Fietkau <nbd@openwrt.org>
+Date:   Mon Mar 5 00:51:01 2012 +0000
+
+    gcc: do not emit references to _savegpr_* and _restgpr_* on powerpc, as they are tricky to deal with wrt. libgcc. they cannot be linked dynamically
+    
+    SVN-Revision: 30814
+--- a/gcc/config/rs6000/rs6000.c
++++ b/gcc/config/rs6000/rs6000.c
+@@ -26936,7 +26936,7 @@ rs6000_savres_strategy (rs6000_stack_t *
+   /* Define cutoff for using out-of-line functions to save registers.  */
+   if (DEFAULT_ABI == ABI_V4 || TARGET_ELF)
+     {
+-      if (!optimize_size)
++      if (1)
+ 	{
+ 	  strategy |= SAVE_INLINE_FPRS | REST_INLINE_FPRS;
+ 	  strategy |= SAVE_INLINE_GPRS | REST_INLINE_GPRS;
diff --git a/toolchain/gcc/patches/7.2.0/881-no_tm_section.patch b/toolchain/gcc/patches/7.2.0/881-no_tm_section.patch
new file mode 100644
index 0000000000..a58dc27e64
--- /dev/null
+++ b/toolchain/gcc/patches/7.2.0/881-no_tm_section.patch
@@ -0,0 +1,22 @@
+commit 565988ab47bd9b96b50608564aee2104aeb4b7ae
+Author: Felix Fietkau <nbd@nbd.name>
+Date:   Tue Dec 13 14:20:49 2016 +0100
+
+    gcc: rip out transactional memory related bloat from crtbegin
+    
+    Slightly improves compression for each executable, saving about 4k from
+    the default ar71xx rootfs
+    
+    Signed-off-by: Felix Fietkau <nbd@nbd.name>
+
+--- a/libgcc/crtstuff.c
++++ b/libgcc/crtstuff.c
+@@ -152,7 +152,7 @@ call_ ## FUNC (void)					\
+ #endif
+ 
+ #if !defined(USE_TM_CLONE_REGISTRY) && defined(OBJECT_FORMAT_ELF)
+-# define USE_TM_CLONE_REGISTRY 1
++# define USE_TM_CLONE_REGISTRY 0
+ #endif
+ 
+ /* We do not want to add the weak attribute to the declarations of these
diff --git a/toolchain/gcc/patches/7.2.0/900-bad-mips16-crt.patch b/toolchain/gcc/patches/7.2.0/900-bad-mips16-crt.patch
new file mode 100644
index 0000000000..f5cc0a74ee
--- /dev/null
+++ b/toolchain/gcc/patches/7.2.0/900-bad-mips16-crt.patch
@@ -0,0 +1,30 @@
+commit 9dc38e48f7a6f88b7ac7bfaced91f53660204e46
+Author: Florian Fainelli <florian@openwrt.org>
+Date:   Fri Apr 5 12:36:06 2013 +0000
+
+    toolchain/gcc: .init and .fini need to pick one ISA
+    
+    The .init and .fini sections are built by concatenating code
+    fragments. Putting mips16 code in the middle of a mips32 code block
+    doesn't work. Make gcc built the magic crt stuff in no-mips16 mode.
+    
+    This is specific to 4.6-linaro but is probably portable to other gcc
+    flavors. Adding this to the t-libgcc-mips16 makefile fragment is a
+    hack not suitable for pushing upstream, but there is no mips/t-linux
+    or mips/t-uclibc and I am not going to touch gcc/configure for two
+    lines.
+    
+    Signed-off-by: Jay Carlson <nop@nop.com>
+    Signed-off-by: Florian Fainelli <florian@openwrt.org>
+    
+    SVN-Revision: 36200
+
+--- a/libgcc/config/mips/t-mips16
++++ b/libgcc/config/mips/t-mips16
+@@ -43,3 +43,6 @@ SYNC_CFLAGS = -mno-mips16
+ 
+ # Version these symbols if building libgcc.so.
+ SHLIB_MAPFILES += $(srcdir)/config/mips/libgcc-mips16.ver
++
++CRTSTUFF_T_CFLAGS += -mno-mips16
++CRTSTUFF_T_CFLAGS_S += -mno-mips16
diff --git a/toolchain/gcc/patches/7.1.0/910-mbsd_multi.patch b/toolchain/gcc/patches/7.2.0/910-mbsd_multi.patch
index 5b664ff227..286cfadae7 100644
--- a/toolchain/gcc/patches/7.1.0/910-mbsd_multi.patch
+++ b/toolchain/gcc/patches/7.2.0/910-mbsd_multi.patch
@@ -1,3 +1,10 @@
+commit 99368862e44740ff4fd33760893f04e14f9dbdf1
+Author: Felix Fietkau <nbd@openwrt.org>
+Date:   Tue Jul 31 00:52:27 2007 +0000
+
+    Port the mbsd_multi patch from freewrt, which adds -fhonour-copts. This will emit warnings in packages that don't use our target cflags properly
+    
+    SVN-Revision: 8256
 
 	This patch brings over a feature from MirBSD:
 	* -fhonour-copts
@@ -107,7 +114,7 @@
  ; On SVR4 targets, it also controls whether or not to emit a
 --- a/gcc/opts.c
 +++ b/gcc/opts.c
-@@ -1921,6 +1921,9 @@ common_handle_option (struct gcc_options
+@@ -1928,6 +1928,9 @@ common_handle_option (struct gcc_options
  			       opts, opts_set, loc, dc);
        break;
  
@@ -119,7 +126,7 @@
        opts->x_warn_larger_than = value != -1;
 --- a/gcc/doc/invoke.texi
 +++ b/gcc/doc/invoke.texi
-@@ -6565,6 +6565,17 @@ This option is only supported for C and
+@@ -6567,6 +6567,17 @@ This option is only supported for C and
  @option{-Wall} and by @option{-Wpedantic}, which can be disabled with
  @option{-Wno-pointer-sign}.
  
@@ -137,4 +144,3 @@
  @item -Wstack-protector
  @opindex Wstack-protector
  @opindex Wno-stack-protector
-
diff --git a/toolchain/gcc/patches/7.1.0/920-specs_nonfatal_getenv.patch b/toolchain/gcc/patches/7.2.0/920-specs_nonfatal_getenv.patch
index 56dbe33c39..69b40621dc 100644
--- a/toolchain/gcc/patches/7.1.0/920-specs_nonfatal_getenv.patch
+++ b/toolchain/gcc/patches/7.2.0/920-specs_nonfatal_getenv.patch
@@ -1,6 +1,13 @@
+Author: Jo-Philipp Wich <jow@openwrt.org>
+Date:   Sat Apr 21 03:02:39 2012 +0000
+
+    gcc: add patch to make the getenv() spec function nonfatal if requested environment variable is unset
+    
+    SVN-Revision: 31390
+
 --- a/gcc/gcc.c
 +++ b/gcc/gcc.c
-@@ -9277,8 +9277,10 @@ getenv_spec_function (int argc, const ch
+@@ -9280,8 +9280,10 @@ getenv_spec_function (int argc, const ch
      value = varname;
  
    if (!value)
diff --git a/toolchain/gcc/patches/7.1.0/930-fix-mips-noexecstack.patch b/toolchain/gcc/patches/7.2.0/930-fix-mips-noexecstack.patch
index 90d10f11e4..90d10f11e4 100644
--- a/toolchain/gcc/patches/7.1.0/930-fix-mips-noexecstack.patch
+++ b/toolchain/gcc/patches/7.2.0/930-fix-mips-noexecstack.patch
diff --git a/toolchain/gcc/patches/7.2.0/940-no-clobber-stamp-bits.patch b/toolchain/gcc/patches/7.2.0/940-no-clobber-stamp-bits.patch
new file mode 100644
index 0000000000..8b88b4066d
--- /dev/null
+++ b/toolchain/gcc/patches/7.2.0/940-no-clobber-stamp-bits.patch
@@ -0,0 +1,33 @@
+commit 548d9a008ff265e9eaa3c7e0e6e301c6bd5645e6
+Author: Felix Fietkau <nbd@openwrt.org>
+Date:   Fri Dec 12 17:01:57 2014 +0000
+
+    gcc: don't clobber stamp-bits with a symlink to itself
+    
+    Several versions of gcc have an issue in libstdc++v3 where the build may
+    clobber stamp-bits with a link to itself.  This doesn't manifest itself
+    on all systems.  On several Ubuntu systems, this doesn't appear to be a
+    problem, but it is an issue on Fedora 16 systems.
+    
+    To fix the issue, we'll simply filter out stamp-bits from the symlinks
+    to be generated.
+    
+    Note: gcc 4.4.7 is unaffected by this issue, so no fix is necessary
+    there.
+    
+    Signed-off-by: John Szakmeister <john@szakmeister.net>
+    
+    SVN-Revision: 43669
+
+
+--- a/libstdc++-v3/include/Makefile.in
++++ b/libstdc++-v3/include/Makefile.in
+@@ -1476,7 +1476,7 @@ stamp-bits: ${bits_headers}
+ 	@$(STAMP) stamp-bits
+ 
+ stamp-bits-sup: stamp-bits ${bits_sup_headers}
+-	@-cd ${bits_builddir} && $(LN_S) $? . 2>/dev/null
++	@-cd ${bits_builddir} && $(LN_S) $(filter-out stamp-bits,$?) . 2>/dev/null
+ 	@$(STAMP) stamp-bits-sup
+ 
+ stamp-c_base: ${c_base_headers}
diff --git a/toolchain/gcc/patches/7.1.0/950-cpp_file_path_translation.patch b/toolchain/gcc/patches/7.2.0/950-cpp_file_path_translation.patch
index ac85c1d6aa..60729dd7fe 100644
--- a/toolchain/gcc/patches/7.1.0/950-cpp_file_path_translation.patch
+++ b/toolchain/gcc/patches/7.2.0/950-cpp_file_path_translation.patch
@@ -1,3 +1,13 @@
+commit 331735a357a73c7b8adc205241ac3cc6543d985e
+Author: Felix Fietkau <nbd@openwrt.org>
+Date:   Tue Nov 17 12:38:22 2015 +0000
+
+    gcc: add a patch to 5.x that supports translation of __FILE__ paths
+    
+    Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+    
+    SVN-Revision: 47490
+
 Forward ported from attachment to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47047
 
 --- a/gcc/c-family/c-opts.c
@@ -53,7 +63,7 @@ Forward ported from attachment to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=4
  When preprocessing, handle directives, but do not expand macros.
 --- a/gcc/doc/invoke.texi
 +++ b/gcc/doc/invoke.texi
-@@ -11861,6 +11861,12 @@ by @option{-fplugin=@var{name}} instead
+@@ -11863,6 +11863,12 @@ by @option{-fplugin=@var{name}} instead
  @option{-fplugin=@var{path}/@var{name}.so}.  This option is not meant
  to be used by the user, but only passed by the driver.