toolchain: add support for GCC 12

GCC 12.1 is out. Add support for it.

Deleted (upstreamed):
011-v12-configure-define-TARGET_LIBC_GNUSTACK-on-musl.patch
931-libffi-fix-MIPS-softfloat-build-issue.patch

Deleted (unneeded?)
970-macos_arm64-building-fix.patch

Other patches manually rebased due to C++ conversion and consequent file name
changing (.c to .cc).

Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>

toolchain/gcc/Config.in

@@ -14,6 +14,9 @@ choice
 
 	config GCC_USE_VERSION_11
 		bool "gcc 11.x"
+
+	config GCC_USE_VERSION_12
+		bool "gcc 12.x"
 endchoice
 
 config GCC_USE_GRAPHITE

toolchain/gcc/Config.version

@@ -6,8 +6,13 @@ config GCC_VERSION_10
 	default y if GCC_USE_VERSION_10
 	bool
 
+config GCC_VERSION_12
+	default y if GCC_USE_VERSION_12
+	bool
+
 config GCC_VERSION
 	string
 	default "8.4.0"		if GCC_VERSION_8
 	default "10.3.0"	if GCC_VERSION_10
+	default "12.1.0"	if GCC_VERSION_12
 	default "11.3.0"

toolchain/gcc/common.mk

@@ -40,6 +40,10 @@ ifeq ($(PKG_VERSION),11.3.0)
   PKG_HASH:=b47cf2818691f5b1e21df2bb38c795fac2cfbd640ede2d0a5e1c89e338a3ac39
 endif
 
+ifeq ($(PKG_VERSION),12.1.0)
+  PKG_HASH:=62fd634889f31c02b64af2c468f064b47ad1ca78411c45abe6ac4b5f8dd19c7b
+endif
+
 PATCH_DIR=../patches/$(GCC_VERSION)
 
 BUGURL=http://bugs.openwrt.org/
@@ -180,6 +184,13 @@ define Host/SetToolchainInfo
 	$(SED) 's,GCC_VERSION=.*,GCC_VERSION=$(GCC_VERSION),' $(TOOLCHAIN_DIR)/info.mk
 endef
 
+
+ifdef CONFIG_GCC_USE_VERSION_12
+	GCC_VERSION_FILE:=gcc/genversion.cc
+else
+	GCC_VERSION_FILE:=gcc/version.c
+endif
+
 ifneq ($(GCC_PREPARE),)
   define Host/Prepare
 	$(call Host/SetToolchainInfo)
@@ -188,8 +199,7 @@ ifneq ($(GCC_PREPARE),)
 	$(CP) $(SCRIPT_DIR)/config.{guess,sub} $(HOST_SOURCE_DIR)/
 	$(SED) 's,^MULTILIB_OSDIRNAMES,# MULTILIB_OSDIRNAMES,' $(HOST_SOURCE_DIR)/gcc/config/*/t-*
 	$(SED) 'd' $(HOST_SOURCE_DIR)/gcc/DEV-PHASE
-	$(SED) 's, DATESTAMP,,' $(HOST_SOURCE_DIR)/gcc/version.c
-	#(cd $(HOST_SOURCE_DIR)/libstdc++-v3; autoconf;);
+	$(SED) 's, DATESTAMP,,' $(HOST_SOURCE_DIR)/$(GCC_VERSION_FILE)
 	$(SED) 's,gcc_no_link=yes,gcc_no_link=no,' $(HOST_SOURCE_DIR)/libstdc++-v3/configure
 	mkdir -p $(GCC_BUILD_DIR)
   endef

toolchain/gcc/patches/12.1.0/002-case_insensitive.patch

@@ -0,0 +1,24 @@
+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
+@@ -44,11 +44,6 @@ extern "C" {
+ #  define IS_DIR_SEPARATOR(c) IS_DOS_DIR_SEPARATOR (c)
+ #  define IS_ABSOLUTE_PATH(f) IS_DOS_ABSOLUTE_PATH (f)
+ #else /* not DOSish */
+-#  if defined(__APPLE__)
+-#    ifndef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
+-#      define HAVE_CASE_INSENSITIVE_FILE_SYSTEM 1
+-#    endif
+-#  endif /* __APPLE__ */
+ #  define HAS_DRIVE_SPEC(f) (0)
+ #  define IS_DIR_SEPARATOR(c) IS_UNIX_DIR_SEPARATOR (c)
+ #  define IS_ABSOLUTE_PATH(f) IS_UNIX_ABSOLUTE_PATH (f)

toolchain/gcc/patches/12.1.0/010-documentation.patch

@@ -0,0 +1,35 @@
+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
+@@ -3366,18 +3366,10 @@ doc/gcc.info: $(TEXI_GCC_FILES)
+ doc/gccint.info: $(TEXI_GCCINT_FILES)
+ doc/cppinternals.info: $(TEXI_CPPINT_FILES)
+
+-doc/%.info: %.texi
+-	if [ x$(BUILD_INFO) = xinfo ]; then \
+-		$(MAKEINFO) $(MAKEINFOFLAGS) -I . -I $(gcc_docdir) \
+-			-I $(gcc_docdir)/include -o $@ $<; \
+-	fi
++doc/%.info:
+
+ # Duplicate entry to handle renaming of gccinstall.info
+-doc/gccinstall.info: $(TEXI_GCCINSTALL_FILES)
+-	if [ x$(BUILD_INFO) = xinfo ]; then \
+-		$(MAKEINFO) $(MAKEINFOFLAGS) -I $(gcc_docdir) \
+-			-I $(gcc_docdir)/include -o $@ $<; \
+-	fi
++doc/gccinstall.info:
+
+ doc/cpp.dvi: $(TEXI_CPP_FILES)
+ doc/gcc.dvi: $(TEXI_GCC_FILES)

toolchain/gcc/patches/12.1.0/110-Fix-MIPS-PR-84790.patch

@@ -0,0 +1,20 @@
+Fix https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84790.
+MIPS16 functions have a static assembler prologue which clobbers
+registers v0 and v1. Add these register clobbers to function call
+instructions.
+
+--- a/gcc/config/mips/mips.cc
++++ b/gcc/config/mips/mips.cc
+@@ -3134,6 +3134,12 @@ mips_emit_call_insn (rtx pattern, rtx or
+       emit_insn (gen_update_got_version ());
+     }
+
++  if (TARGET_MIPS16 && TARGET_USE_GOT)
++    {
++      clobber_reg (&CALL_INSN_FUNCTION_USAGE (insn), MIPS16_PIC_TEMP);
++      clobber_reg (&CALL_INSN_FUNCTION_USAGE (insn), MIPS_PROLOGUE_TEMP (word_mode));
++    }
++
+   if (TARGET_MIPS16
+       && TARGET_EXPLICIT_RELOCS
+       && TARGET_CALL_CLOBBERED_GP)

toolchain/gcc/patches/12.1.0/230-musl_libssp.patch

@@ -0,0 +1,13 @@
+--- a/gcc/gcc.cc
++++ b/gcc/gcc.cc
+@@ -985,7 +985,9 @@ 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

toolchain/gcc/patches/12.1.0/300-mips_Os_cpu_rtx_cost_model.patch

@@ -0,0 +1,21 @@
+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.cc
++++ b/gcc/config/mips/mips.cc
+@@ -20216,7 +20216,7 @@ mips_option_override (void)
+     flag_pcc_struct_return = 0;
+
+   /* Decide which rtx_costs structure to use.  */
+-  if (optimize_size)
++  if (0 && optimize_size)
+     mips_cost = &mips_rtx_cost_optimize_size;
+   else
+     mips_cost = &mips_rtx_cost_data[mips_tune];

toolchain/gcc/patches/12.1.0/810-arm-softfloat-libgcc.patch

@@ -0,0 +1,33 @@
+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 @@
+ LIB1ASMSRC = arm/lib1funcs.S
+ LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx _clzsi2 _clzdi2 \
+-	_ctzsi2 _arm_addsubdf3 _arm_addsubsf3
++	_ctzsi2 _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.
+--- a/gcc/config/arm/linux-elf.h
++++ b/gcc/config/arm/linux-elf.h
+@@ -58,8 +58,6 @@
+    %{shared:-lc} \
+    %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
+
+-#define LIBGCC_SPEC "%{mfloat-abi=soft*:-lfloat} -lgcc"
+-
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
+
+ #define LINUX_TARGET_LINK_SPEC  "%{h*} \

toolchain/gcc/patches/12.1.0/820-libgcc_pic.patch

@@ -0,0 +1,44 @@
+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
+@@ -930,11 +930,12 @@ $(libgcov-driver-objects): %$(objext): $
+
+ # Static libraries.
+ libgcc.a: $(libgcc-objects)
++libgcc_pic.a: $(libgcc-s-objects)
+ libgcov.a: $(libgcov-objects)
+ libunwind.a: $(libunwind-objects)
+ libgcc_eh.a: $(libgcc-eh-objects)
+
+-libgcc.a libgcov.a libunwind.a libgcc_eh.a:
++libgcc.a libgcov.a libunwind.a libgcc_eh.a libgcc_pic.a:
+ 	-rm -f $@
+
+ 	objects="$(objects)";					\
+@@ -958,7 +959,7 @@ all: libunwind.a
+ endif
+
+ ifeq ($(enable_shared),yes)
+-all: libgcc_eh.a libgcc_s$(SHLIB_EXT)
++all: libgcc_eh.a libgcc_pic.a libgcc_s$(SHLIB_EXT)
+ ifneq ($(LIBUNWIND),)
+ all: libunwind$(SHLIB_EXT)
+ libgcc_s$(SHLIB_EXT): libunwind$(SHLIB_EXT)
+@@ -1164,6 +1165,10 @@ install-shared:
+ 	chmod 644 $(DESTDIR)$(inst_libdir)/libgcc_eh.a
+ 	$(RANLIB) $(DESTDIR)$(inst_libdir)/libgcc_eh.a
+
++	$(INSTALL_DATA) libgcc_pic.a $(mapfile) $(DESTDIR)$(inst_libdir)/
++	chmod 644 $(DESTDIR)$(inst_libdir)/libgcc_pic.a
++	$(RANLIB) $(DESTDIR)$(inst_libdir)/libgcc_pic.a
++
+ 	$(subst @multilib_dir@,$(MULTIDIR),$(subst \
+ 		@shlib_base_name@,libgcc_s,$(subst \
+ 		@shlib_slibdir_qual@,$(MULTIOSSUBDIR),$(SHLIB_INSTALL))))

toolchain/gcc/patches/12.1.0/840-armv4_pass_fix-v4bx_to_ld.patch

@@ -0,0 +1,28 @@
+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
+@@ -91,10 +91,15 @@
+ #define MUSL_DYNAMIC_LINKER \
+   "/lib/ld-musl-arm" MUSL_DYNAMIC_LINKER_E "%{mfloat-abi=hard:hf}%{mfdpic:-fdpic}.so.1"
+
++/* For armv4 we pass --fix-v4bx to linker to support EABI */
++#undef TARGET_FIX_V4BX_SPEC
++#define TARGET_FIX_V4BX_SPEC " %{mcpu=arm8|mcpu=arm810|mcpu=strongarm*"\
++  "|march=armv4|mcpu=fa526|mcpu=fa626:--fix-v4bx}"
++
+ /* At this point, bpabi.h will have clobbered LINK_SPEC.  We want to
+    use the GNU/Linux version, not the generic BPABI version.  */
+ #undef  LINK_SPEC
+-#define LINK_SPEC EABI_LINK_SPEC					\
++#define LINK_SPEC EABI_LINK_SPEC TARGET_FIX_V4BX_SPEC			\
+   LINUX_OR_ANDROID_LD (LINUX_TARGET_LINK_SPEC,				\
+ 		       LINUX_TARGET_LINK_SPEC " " ANDROID_LINK_SPEC)
+

toolchain/gcc/patches/12.1.0/850-use_shared_libgcc.patch

@@ -0,0 +1,54 @@
+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
+@@ -132,10 +132,6 @@
+   "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} "	\
+   LINUX_OR_ANDROID_LD (GNU_USER_TARGET_ENDFILE_SPEC, ANDROID_ENDFILE_SPEC)
+
+-/* Use the default LIBGCC_SPEC, not the version in linux-elf.h, as we
+-   do not use -lfloat.  */
+-#undef LIBGCC_SPEC
+-
+ /* Clear the instruction cache from `beg' to `end'.  This is
+    implemented in lib1funcs.S, so ensure an error if this definition
+    is used.  */
+--- a/gcc/config/linux.h
++++ b/gcc/config/linux.h
+@@ -71,6 +71,10 @@ see the files COPYING3 and COPYING.RUNTI
+ 	  builtin_version ("CRuntime_Musl");			\
+     } while (0)
+
++#ifndef LIBGCC_SPEC
++#define LIBGCC_SPEC "%{static|static-libgcc:-lgcc}%{!static:%{!static-libgcc:-lgcc_s}}"
++#endif
++
+ /* Determine which dynamic linker to use depending on whether GLIBC or
+    uClibc or Bionic or musl is the default C library and whether
+    -muclibc or -mglibc or -mbionic or -mmusl has been passed to change
+--- a/libgcc/mkmap-symver.awk
++++ b/libgcc/mkmap-symver.awk
+@@ -136,5 +136,5 @@ function output(lib) {
+   else if (inherit[lib])
+     printf("} %s;\n", inherit[lib]);
+   else
+-    printf ("\n  local:\n\t*;\n};\n");
++    printf ("\n\t*;\n};\n");
+ }
+--- a/gcc/config/rs6000/linux.h
++++ b/gcc/config/rs6000/linux.h
+@@ -67,6 +67,9 @@
+ #undef	CPP_OS_DEFAULT_SPEC
+ #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
+
++#undef LIBGCC_SPEC
++#define LIBGCC_SPEC "%{!static:%{!static-libgcc:-lgcc_s}} -lgcc"
++
+ #undef  LINK_SHLIB_SPEC
+ #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}} \
+   %{static-pie:-static -pie --no-dynamic-linker -z text}"

toolchain/gcc/patches/12.1.0/851-libgcc_no_compat.patch

@@ -0,0 +1,22 @@
+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 @@
+
+ HOST_LIBGCC2_CFLAGS += -DUSE_GAS_SYMVER
+
+-LIB2ADDEH = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c \
+-  $(srcdir)/unwind-compat.c $(srcdir)/unwind-dw2-fde-compat.c
++LIB2ADDEH = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
+ LIB2ADDEHSTATIC = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
+
+ # Override the default value from t-slibgcc-elf-ver and mention -lunwind

toolchain/gcc/patches/12.1.0/870-ppc_no_crtsavres.patch

@@ -0,0 +1,11 @@
+--- a/gcc/config/rs6000/rs6000-logue.cc
++++ b/gcc/config/rs6000/rs6000-logue.cc
+@@ -348,7 +348,7 @@ 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;

toolchain/gcc/patches/12.1.0/881-no_tm_section.patch

@@ -0,0 +1,11 @@
+--- 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
+ #elif !defined(USE_TM_CLONE_REGISTRY)
+ # define USE_TM_CLONE_REGISTRY 0
+ #endif

toolchain/gcc/patches/12.1.0/900-bad-mips16-crt.patch

@@ -0,0 +1,9 @@
+--- 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