diff --git a/libc/include/stdio.h b/libc/include/stdio.h
index 51c4b9bd..0d957168 100644
--- a/libc/include/stdio.h
+++ b/libc/include/stdio.h
@@ -198,6 +198,9 @@ extern "C"
     /* Change a file's buffering mode to line buffered. */
     void setlinebuf(FILE* stream);
 
+    /* Move a file's location across a file system. */
+    int rename(const char* oldpath, const char* newpath);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/libc/src/stdio.cpp b/libc/src/stdio.cpp
index 5d6e4a38..77fce1db 100644
--- a/libc/src/stdio.cpp
+++ b/libc/src/stdio.cpp
@@ -752,4 +752,13 @@ extern "C"
     {
         setvbuf(stream, NULL, _IOLBF, 0);
     }
+
+    int rename(const char* oldpath, const char* newpath)
+    {
+        // FIXME: Implement this atomically in-kernel.
+        unlink(newpath);
+        if (link(oldpath, newpath) < 0) return -1;
+        unlink(oldpath);
+        return 0;
+    }
 }
diff --git a/libluna/src/Heap.cpp b/libluna/src/Heap.cpp
index 1d85d2a7..bc186ee3 100644
--- a/libluna/src/Heap.cpp
+++ b/libluna/src/Heap.cpp
@@ -17,10 +17,14 @@
 #include <sys/mman.h>
 #endif
 
+// Otherwise, this is defined in libstdc++.
+#ifdef USE_FREESTANDING
+
 namespace std
 {
     const nothrow_t nothrow;
 }
+#endif
 
 static constexpr int BLOCK_USED = 1 << 0;
 static constexpr int BLOCK_START_MEM = 1 << 1;
@@ -417,6 +421,8 @@ void dump_heap_usage()
     dbgln("-- Heap memory in use: %zu bytes", alloc_used);
 }
 
+// Otherwise, this is defined in libstdc++.
+#ifdef USE_FREESTANDING
 void* operator new(usize size, const std::nothrow_t&) noexcept
 {
     return malloc_impl(size).value_or(nullptr);
@@ -446,3 +452,4 @@ void operator delete[](void* p, usize) noexcept
 {
     free_impl(p);
 }
+#endif
diff --git a/tools/gcc.patch b/tools/gcc.patch
index 3a984f97..2ba6afc5 100644
--- a/tools/gcc.patch
+++ b/tools/gcc.patch
@@ -1,6 +1,6 @@
-diff --color -rN -u gcc-12.2.0/config.sub build/gcc-12.2.0/config.sub
+diff --color -rN -u vanilla/gcc-12.2.0/config.sub gcc-12.2.0/config.sub
 --- a/gcc-12.2.0/config.sub	2022-08-19 10:09:52.128656687 +0200
-+++ b/gcc-12.2.0/config.sub	2022-10-02 11:27:45.660055384 +0200
++++ b/gcc-12.2.0/config.sub	2023-08-08 20:42:05.032843544 +0200
 @@ -1723,7 +1723,7 @@
  	     | hpux* | unos* | osf* | luna* | dgux* | auroraux* | solaris* \
  	     | sym* |  plan9* | psp* | sim* | xray* | os68k* | v88r* \
@@ -10,9 +10,9 @@ diff --color -rN -u gcc-12.2.0/config.sub build/gcc-12.2.0/config.sub
  	     | mpw* | magic* | mmixware* | mon960* | lnews* \
  	     | amigaos* | amigados* | msdos* | newsos* | unicos* | aof* \
  	     | aos* | aros* | cloudabi* | sortix* | twizzler* \
-diff --color -rN -u gcc-12.2.0/fixincludes/mkfixinc.sh build/gcc-12.2.0/fixincludes/mkfixinc.sh
+diff --color -rN -u vanilla/gcc-12.2.0/fixincludes/mkfixinc.sh gcc-12.2.0/fixincludes/mkfixinc.sh
 --- a/gcc-12.2.0/fixincludes/mkfixinc.sh	2022-08-19 10:09:52.160657095 +0200
-+++ b/gcc-12.2.0/fixincludes/mkfixinc.sh	2022-10-02 11:27:45.662055397 +0200
++++ b/gcc-12.2.0/fixincludes/mkfixinc.sh	2023-08-08 20:42:05.034843561 +0200
 @@ -12,6 +12,8 @@
  # Check for special fix rules for particular targets
  case $machine in
@@ -22,18 +22,18 @@ diff --color -rN -u gcc-12.2.0/fixincludes/mkfixinc.sh build/gcc-12.2.0/fixinclu
      i?86-*-mingw32* | \
      x86_64-*-mingw32* | \
      powerpc-*-eabisim* | \
-diff --color -rN -u gcc-12.2.0/gcc/config/i386/x86_64-luna-kernel build/gcc-12.2.0/gcc/config/i386/x86_64-luna-kernel
---- a/dev/null	1970-01-01 01:00:00.000000000 +0100
-+++ b/gcc-12.2.0/gcc/config/i386/x86_64-luna-kernel	2022-10-02 11:45:30.955856133 +0200
+diff --color -rN -u vanilla/gcc-12.2.0/gcc/config/i386/x86_64-luna-kernel gcc-12.2.0/gcc/config/i386/x86_64-luna-kernel
+--- a/gcc-12.2.0/gcc/config/i386/x86_64-luna-kernel	1970-01-01 01:00:00.000000000 +0100
++++ b/gcc-12.2.0/gcc/config/i386/x86_64-luna-kernel	2023-08-08 20:42:05.038843594 +0200
 @@ -0,0 +1,4 @@
 +#Add libgcc multilib variant without red-zone requirement, for use in the kernel
 +
 +MULTILIB_OPTIONS += mno-red-zone
 +MULTILIB_DIRNAMES += no-red-zone
 \ No newline at end of file
-diff --color -rN -u gcc-12.2.0/gcc/config/luna.h build/gcc-12.2.0/gcc/config/luna.h
---- a/dev/null	1970-01-01 01:00:00.000000000 +0100
-+++ b/gcc-12.2.0/gcc/config/luna.h	2022-10-02 11:27:45.663055404 +0200
+diff --color -rN -u vanilla/gcc-12.2.0/gcc/config/luna.h gcc-12.2.0/gcc/config/luna.h
+--- a/gcc-12.2.0/gcc/config/luna.h	1970-01-01 01:00:00.000000000 +0100
++++ b/gcc-12.2.0/gcc/config/luna.h	2023-08-08 20:42:05.040843610 +0200
 @@ -0,0 +1,36 @@
 +#undef TARGET_LUNA
 +#define TARGET_LUNA 1
@@ -71,11 +71,9 @@ diff --color -rN -u gcc-12.2.0/gcc/config/luna.h build/gcc-12.2.0/gcc/config/lun
 +    } while (0);
 +
 +#undef LINK_SPEC
-+#define LINK_SPEC "-z max-page-size=4096"
-\ No newline at end of file
-diff --color -rN -u gcc-12.2.0/gcc/config.gcc build/gcc-12.2.0/gcc/config.gcc
+diff --color -rN -u vanilla/gcc-12.2.0/gcc/config.gcc gcc-12.2.0/gcc/config.gcc
 --- a/gcc-12.2.0/gcc/config.gcc	2022-08-19 10:09:52.552662114 +0200
-+++ b/gcc-12.2.0/gcc/config.gcc	2022-10-02 11:45:18.311797546 +0200
++++ b/gcc-12.2.0/gcc/config.gcc	2023-08-08 20:42:05.044843643 +0200
 @@ -895,6 +895,12 @@
        ;;
    esac
@@ -103,9 +101,9 @@ diff --color -rN -u gcc-12.2.0/gcc/config.gcc build/gcc-12.2.0/gcc/config.gcc
  x86_64-*-rtems*)
  	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h newlib-stdint.h i386/i386elf.h i386/x86-64.h i386/rtemself.h rtems.h"
  	;;
-diff --color -rN -u gcc-12.2.0/libgcc/config.host build/gcc-12.2.0/libgcc/config.host
+diff --color -rN -u vanilla/gcc-12.2.0/libgcc/config.host gcc-12.2.0/libgcc/config.host
 --- a/gcc-12.2.0/libgcc/config.host	2022-08-19 10:09:54.664689148 +0200
-+++ b/gcc-12.2.0/libgcc/config.host	2022-10-02 11:27:45.671055461 +0200
++++ b/gcc-12.2.0/libgcc/config.host	2023-08-08 20:42:05.046843660 +0200
 @@ -783,6 +783,14 @@
  	;;
  i[34567]86-*-lynxos*)
@@ -121,9 +119,9 @@ diff --color -rN -u gcc-12.2.0/libgcc/config.host build/gcc-12.2.0/libgcc/config
  i[34567]86-*-nto-qnx*)
  	tmake_file="$tmake_file i386/t-nto t-libgcc-pic"
  	extra_parts=crtbegin.o
-diff --color -rN -u gcc-12.2.0/libgcc/libgcov.h build/gcc-12.2.0/libgcc/libgcov.h
+diff --color -rN -u vanilla/gcc-12.2.0/libgcc/libgcov.h gcc-12.2.0/libgcc/libgcov.h
 --- a/gcc-12.2.0/libgcc/libgcov.h	2022-08-19 10:09:54.728689966 +0200
-+++ b/gcc-12.2.0/libgcc/libgcov.h	2022-10-02 11:41:48.571807335 +0200
++++ b/gcc-12.2.0/libgcc/libgcov.h	2023-08-08 20:42:05.048843677 +0200
 @@ -194,6 +194,7 @@
  #endif
  
@@ -132,3 +130,79 @@ diff --color -rN -u gcc-12.2.0/libgcc/libgcov.h build/gcc-12.2.0/libgcc/libgcov.
  
  /* Structures embedded in coveraged program.  The structures generated
     by write_profile must match these.  */
+diff --color -rN -u vanilla/gcc-12.2.0/libstdc++-v3/acinclude.m4 gcc-12.2.0/libstdc++-v3/acinclude.m4
+--- a/gcc-12.2.0/libstdc++-v3/acinclude.m4	2022-08-19 10:09:55.380698313 +0200
++++ b/gcc-12.2.0/libstdc++-v3/acinclude.m4	2023-08-08 21:08:00.777765701 +0200
+@@ -1356,6 +1356,10 @@
+         ac_has_nanosleep=yes
+         ac_has_sched_yield=yes
+         ;;
++      luna*)
++        ac_has_clock_monotonic=yes
++	ac_has_clock_realtime=yes
++	;;
+       # VxWorks has nanosleep as soon as the kernel is configured with
+       # INCLUDE_POSIX_TIMERS, which is normally/most-often the case.
+       vxworks*)
+@@ -2421,7 +2425,7 @@
+       dragonfly* | freebsd*)
+ 	enable_clocale_flag=dragonfly
+ 	;;
+-      openbsd*)
++      openbsd* | luna*)
+ 	enable_clocale_flag=newlib
+ 	;;
+       *)
+diff --color -rN -u vanilla/gcc-12.2.0/libstdc++-v3/configure gcc-12.2.0/libstdc++-v3/configure
+--- a/gcc-12.2.0/libstdc++-v3/configure	2022-08-19 10:09:55.416698774 +0200
++++ b/gcc-12.2.0/libstdc++-v3/configure	2023-08-09 11:34:54.810282202 +0200
+@@ -16481,6 +16481,9 @@
+       openbsd*)
+ 	enable_clocale_flag=newlib
+ 	;;
++      luna*)
++	enable_clocale_flag=generic
++	;;
+       *)
+ 	if test x"$with_newlib" = x"yes"; then
+ 	  enable_clocale_flag=newlib
+@@ -20493,6 +20496,10 @@
+         ac_has_nanosleep=yes
+         ac_has_sched_yield=yes
+         ;;
++      luna*)
++        ac_has_clock_monotonic=yes
++	ac_has_clock_realtime=yes
++	;;
+       # VxWorks has nanosleep as soon as the kernel is configured with
+       # INCLUDE_POSIX_TIMERS, which is normally/most-often the case.
+       vxworks*)
+diff --color -rN -u vanilla/gcc-12.2.0/libstdc++-v3/configure.host gcc-12.2.0/libstdc++-v3/configure.host
+--- a/gcc-12.2.0/libstdc++-v3/configure.host	2022-08-19 10:09:55.420698825 +0200
++++ b/gcc-12.2.0/libstdc++-v3/configure.host	2023-08-09 11:35:05.734185945 +0200
+@@ -306,6 +306,9 @@
+   vxworks*)
+     os_include_dir="os/vxworks"
+     ;;
++  luna*)
++    os_include_dir="os/generic"
++    ;;
+   *)
+     os_include_dir="os/generic"
+     ;;
+diff --color -rN -u vanilla/gcc-12.2.0/libstdc++-v3/crossconfig.m4 gcc-12.2.0/libstdc++-v3/crossconfig.m4
+--- a/gcc-12.2.0/libstdc++-v3/crossconfig.m4	2022-08-19 10:09:55.420698825 +0200
++++ b/gcc-12.2.0/libstdc++-v3/crossconfig.m4	2023-08-08 21:16:12.897071194 +0200
+@@ -277,6 +277,12 @@
+     GLIBCXX_CHECK_MATH_SUPPORT
+     GLIBCXX_CHECK_STDLIB_SUPPORT
+     ;;
++  *-luna*)
++    GLIBCXX_CHECK_COMPILER_FEATURES
++    GLIBCXX_CHECK_LINKER_FEATURES
++    GLIBCXX_CHECK_MATH_SUPPORT
++    GLIBCXX_CHECK_STDLIB_SUPPORT
++    ;;
+   *-vxworks*)
+     AC_DEFINE(HAVE_ACOSF)
+     AC_DEFINE(HAVE_ASINF)
diff --git a/tools/setup-gcc.sh b/tools/setup-gcc.sh
index 3c8fda9e..773352c4 100755
--- a/tools/setup-gcc.sh
+++ b/tools/setup-gcc.sh
@@ -47,7 +47,7 @@ unset CXX
 unset LD
 unset AR
 
-../gcc-$LUNA_GCC_VERSION_REQUIRED/configure --prefix="$BUILD_PREFIX" --target=$BUILD_TARGET --disable-nls --with-sysroot=$BUILD_SYSROOT --enable-languages=c,c++ --without-headers
+../gcc-$LUNA_GCC_VERSION_REQUIRED/configure --prefix="$BUILD_PREFIX" --target=$BUILD_TARGET --disable-nls --with-sysroot=$BUILD_SYSROOT --enable-languages=c,c++
 
 echo Building GCC...
 
@@ -58,3 +58,10 @@ echo Installing GCC...
 
 make install-gcc
 make install-target-libgcc
+
+mkdir -p $LUNA_BUILD_DIR
+cmake -S $LUNA_ROOT -B $LUNA_BUILD_DIR -G "$LUNA_CMAKE_GENERATOR_NAME"
+cmake --build $LUNA_BUILD_DIR --target libc
+
+make all-target-libstdc++-v3 CXXFLAGS_FOR_TARGET="-fno-exceptions" -j$(nproc)
+make DESTDIR=$LUNA_BASE/usr install-target-libstdc++-v3