patch-gcc

diff -ruN gcc-9.1.0/config.sub gcc-modified/config.sub
--- gcc-9.1.0/config.sub	2019-01-03 12:28:27.000000000 +0100
+++ gcc-modified/config.sub	2019-08-01 20:03:29.926429356 +0200
@@ -1366,6 +1366,7 @@
 	     | midnightbsd* | amdhsa* | unleashed* | emscripten*)
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
+	turbofish*);;
 	qnx*)
 		case $cpu in
 		    x86 | i*86)
diff -ruN gcc-9.1.0/fixincludes/mkfixinc.sh gcc-modified/fixincludes/mkfixinc.sh
--- gcc-9.1.0/fixincludes/mkfixinc.sh	2016-06-21 23:57:20.000000000 +0200
+++ gcc-modified/fixincludes/mkfixinc.sh	2019-08-01 20:03:29.926429356 +0200
@@ -11,6 +11,7 @@
 
 # Check for special fix rules for particular targets
 case $machine in
+    *-myos* | \
     i?86-*-cygwin* | \
     i?86-*-mingw32* | \
     x86_64-*-mingw32* | \
@@ -28,5 +29,7 @@
     *)
 	cat < ${srcdir}/fixinc.in > ${target} || exit 1
 	;;
+ 
 esac
+
 chmod 755 ${target}
diff -ruN gcc-9.1.0/gcc/config/turbofish.h gcc-modified/gcc/config/turbofish.h
--- gcc-9.1.0/gcc/config/turbofish.h	1970-01-01 01:00:00.000000000 +0100
+++ gcc-modified/gcc/config/turbofish.h	2019-08-01 20:03:29.926429356 +0200
@@ -0,0 +1,28 @@
+/* Useful if you wish to make target-specific GCC changes. */
+#undef TARGET_TURBOFISH
+#define TARGET_TURBOFISH 1
+ 
+/* Default arguments you want when running your
+   i686-turbofish-gcc/x86_64-turbofish-gcc toolchain */
+#undef LIB_SPEC
+#define LIB_SPEC "-lc" /* link against C standard library */
+ 
+/* Files that are linked before user code.
+   The %s tells GCC to look for these files in the library directory. */
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
+ 
+/* Files that are linked after user code. */
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
+ 
+/* Additional predefined macros. */
+#undef TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS()      \
+  do {                                \
+    builtin_define ("__turbofish__");      \
+    builtin_define ("__unix__");      \
+    builtin_assert ("system=turbofish");   \
+    builtin_assert ("system=unix");   \
+    builtin_assert ("system=posix");   \
+  } while(0);
diff -ruN gcc-9.1.0/gcc/config.gcc gcc-modified/gcc/config.gcc
--- gcc-9.1.0/gcc/config.gcc	2019-04-15 10:05:03.000000000 +0200
+++ gcc-modified/gcc/config.gcc	2019-08-01 20:03:29.926429356 +0200
@@ -612,6 +612,14 @@
 		tm_defines="${tm_defines} USE_IX86_FRAME_POINTER=1"
 	fi
 	;;
+
+*-*-turbofish*)
+  gas=yes
+  gnu_ld=yes
+  default_use_cxa_atexit=yes
+  use_gcc_stdint=wrap
+  ;;
+
 x86_64-*-*)
 	case ${with_abi} in
 	"")
@@ -978,6 +986,12 @@
 esac
 
 case ${target} in
+i[34567]86-*-turbofish*)
+    tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h glibc-stdint.h i386/i386elf.h turbofish.h"
+    ;;
+x86_64-*-turbofish*)
+    tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h glibc-stdint.h i386/i386elf.h i386/x86-64.h turbofish.h"
+    ;;
 aarch64*-*-elf | aarch64*-*-fuchsia* | aarch64*-*-rtems*)
 	tm_file="${tm_file} dbxelf.h elfos.h newlib-stdint.h"
 	tm_file="${tm_file} aarch64/aarch64-elf.h aarch64/aarch64-elf-raw.h"
diff -ruN gcc-9.1.0/libgcc/config.host gcc-modified/libgcc/config.host
--- gcc-9.1.0/libgcc/config.host	2019-01-17 13:29:13.000000000 +0100
+++ gcc-modified/libgcc/config.host	2019-08-01 20:03:29.926429356 +0200
@@ -343,6 +343,14 @@
 esac
 
 case ${host} in
+i[34567]86-*-turbofish*)
+	extra_parts="$extra_parts crti.o crtbegin.o crtend.o crtn.o"
+	tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
+	;;
+x86_64-*-turbofish*)
+	extra_parts="$extra_parts crti.o crtbegin.o crtend.o crtn.o"
+	tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
+	;;
 aarch64*-*-elf | aarch64*-*-rtems*)
 	extra_parts="$extra_parts crtbegin.o crtend.o crti.o crtn.o"
 	extra_parts="$extra_parts crtfastmath.o"
diff -ruN gcc-9.1.0/libstdc++-v3/crossconfig.m4 gcc-modified/libstdc++-v3/crossconfig.m4
--- gcc-9.1.0/libstdc++-v3/crossconfig.m4	2019-03-11 17:28:11.000000000 +0100
+++ gcc-modified/libstdc++-v3/crossconfig.m4	2019-08-01 20:03:29.926429356 +0200
@@ -35,6 +35,13 @@
     AC_DEFINE(HAVE_TANHF)
     ;;
 
+ *-turbofish*)
+    GLIBCXX_CHECK_COMPILER_FEATURES
+    GLIBCXX_CHECK_LINKER_FEATURES
+    GLIBCXX_CHECK_MATH_SUPPORT
+    GLIBCXX_CHECK_STDLIB_SUPPORT
+    ;;
+
   mips*-sde-elf*)
     # These definitions are for the SDE C library rather than newlib.
     SECTION_FLAGS='-ffunction-sections -fdata-sections'