diff --git a/gcc12/libitm-riscv64.patch b/gcc12/libitm-riscv64.patch
new file mode 100644
index 000000000..2eca5855d
--- /dev/null
+++ b/gcc12/libitm-riscv64.patch
@@ -0,0 +1,205 @@
+diff --git a/libitm/config/riscv/asm.h b/libitm/config/riscv/asm.h
+new file mode 100644
+index 0000000..0f58bc1
+--- /dev/null
++++ b/libitm/config/riscv/asm.h
+@@ -0,0 +1,28 @@
++#ifndef _RV_ASM_H
++#define _RV_ASM_H
++
++#if __riscv_xlen == 64
++#  define GPR_L ld
++#  define GPR_S sd
++#  define SZ_GPR 8
++#elif __riscv_xlen == 32
++#  define GPR_L lw
++#  define GPR_S sw
++#  define SZ_GPR 4
++#else
++#  error Unsupported XLEN (must be 64-bit or 32-bit).
++#endif
++
++#if defined(__riscv_flen) && __riscv_flen == 64
++#  define FPR_L fld
++#  define FPR_S fsd
++#  define SZ_FPR 8
++#elif defined(__riscv_flen) && __riscv_flen == 32
++#  define FPR_L flw
++#  define FPR_S fsw
++#  define SZ_FPR 4
++#else
++#  define SZ_FPR 0
++#endif
++
++#endif  /* _RV_ASM_H */
+diff --git a/libitm/config/riscv/sjlj.S b/libitm/config/riscv/sjlj.S
+new file mode 100644
+index 0000000..b4e15fc
+--- /dev/null
++++ b/libitm/config/riscv/sjlj.S
+@@ -0,0 +1,120 @@
++#include "asmcfi.h"
++#include "asm.h"
++
++	.text
++	.align	2
++	.global	_ITM_beginTransaction
++	.type	_ITM_beginTransaction, @function
++
++_ITM_beginTransaction:
++	cfi_startproc
++    mv a1, sp
++	addi sp, sp, -(14*SZ_GPR+12*SZ_FPR)
++	cfi_adjust_cfa_offset(14*SZ_GPR+12*SZ_FPR)
++
++	/* Return Address */
++	GPR_S ra, 0*SZ_GPR(sp)
++	cfi_rel_offset(ra, 0*SZ_GPR)
++
++	/* Caller's sp */
++	GPR_S a1, 1*SZ_GPR(sp)
++
++	/* Caller's s0/fp */
++	GPR_S fp, 2*SZ_GPR(sp)
++	cfi_rel_offset(fp, 2*SZ_GPR)
++
++	/* Callee-saved registers */
++	GPR_S s1, 3*SZ_GPR(sp)
++	GPR_S s2, 4*SZ_GPR(sp)
++	GPR_S s3, 5*SZ_GPR(sp)
++	GPR_S s4, 6*SZ_GPR(sp)
++	GPR_S s5, 7*SZ_GPR(sp)
++	GPR_S s6, 8*SZ_GPR(sp)
++	GPR_S s7, 9*SZ_GPR(sp)
++	GPR_S s8, 10*SZ_GPR(sp)
++	GPR_S s9, 11*SZ_GPR(sp)
++	GPR_S s10, 12*SZ_GPR(sp)
++	GPR_S s11, 13*SZ_GPR(sp)
++
++#if defined(__riscv_flen)
++	/* Callee-saved floating-point registers */
++	FPR_S fs0, 0*SZ_FPR+14*SZ_GPR(sp)
++	FPR_S fs1, 1*SZ_FPR+14*SZ_GPR(sp)
++	FPR_S fs2, 2*SZ_FPR+14*SZ_GPR(sp)
++	FPR_S fs3, 3*SZ_FPR+14*SZ_GPR(sp)
++	FPR_S fs4, 4*SZ_FPR+14*SZ_GPR(sp)
++	FPR_S fs5, 5*SZ_FPR+14*SZ_GPR(sp)
++	FPR_S fs6, 6*SZ_FPR+14*SZ_GPR(sp)
++	FPR_S fs7, 7*SZ_FPR+14*SZ_GPR(sp)
++	FPR_S fs8, 8*SZ_FPR+14*SZ_GPR(sp)
++	FPR_S fs9, 9*SZ_FPR+14*SZ_GPR(sp)
++	FPR_S fs10, 10*SZ_FPR+14*SZ_GPR(sp)
++	FPR_S fs11, 11*SZ_FPR+14*SZ_GPR(sp)
++#endif
++	mv fp, sp
++
++	/* Invoke GTM_begin_transaction with the struct we've just built.  */
++	mv a1, sp
++	jal ra, GTM_begin_transaction
++
++	/* Return; we don't need to restore any of the call-saved regs.  */
++	GPR_L ra, 0*SZ_GPR(sp)
++	cfi_restore(ra)
++	GPR_L fp, 2*SZ_GPR(sp)
++	cfi_restore(fp)
++
++	addi sp, sp, 14*SZ_GPR+12*SZ_FPR
++	cfi_adjust_cfa_offset(-(14*SZ_GPR+12*SZ_FPR))
++
++	ret
++	cfi_endproc
++	.size	_ITM_beginTransaction, . - _ITM_beginTransaction
++
++	.align	2
++	.global	GTM_longjmp
++	.hidden	GTM_longjmp
++	.type	GTM_longjmp, @function
++
++GTM_longjmp:
++	/* The first parameter becomes the return value (x0).
++	   The third parameter is ignored for now.  */
++    cfi_startproc
++	GPR_L s1, 3*SZ_GPR(a1)
++	GPR_L s2, 4*SZ_GPR(a1)
++	GPR_L s3, 5*SZ_GPR(a1)
++	GPR_L s4, 6*SZ_GPR(a1)
++	GPR_L s5, 7*SZ_GPR(a1)
++	GPR_L s6, 8*SZ_GPR(a1)
++	GPR_L s7, 9*SZ_GPR(a1)
++	GPR_L s8, 10*SZ_GPR(a1)
++	GPR_L s9, 11*SZ_GPR(a1)
++	GPR_L s10, 12*SZ_GPR(a1)
++	GPR_L s11, 13*SZ_GPR(a1)
++
++#if defined(__riscv_flen)
++	FPR_L fs0, 0*SZ_FPR+14*SZ_GPR(a1)
++	FPR_L fs1, 1*SZ_FPR+14*SZ_GPR(a1)
++	FPR_L fs2, 2*SZ_FPR+14*SZ_GPR(a1)
++	FPR_L fs3, 3*SZ_FPR+14*SZ_GPR(a1)
++	FPR_L fs4, 4*SZ_FPR+14*SZ_GPR(a1)
++	FPR_L fs5, 5*SZ_FPR+14*SZ_GPR(a1)
++	FPR_L fs6, 6*SZ_FPR+14*SZ_GPR(a1)
++	FPR_L fs7, 7*SZ_FPR+14*SZ_GPR(a1)
++	FPR_L fs8, 8*SZ_FPR+14*SZ_GPR(a1)
++	FPR_L fs9, 9*SZ_FPR+14*SZ_GPR(a1)
++	FPR_L fs10, 10*SZ_FPR+14*SZ_GPR(a1)
++	FPR_L fs11, 11*SZ_FPR+14*SZ_GPR(a1)
++#endif
++
++	GPR_L ra, 0*SZ_GPR(a1)
++	GPR_L fp, 2*SZ_GPR(a1)
++	GPR_L a3, 1*SZ_GPR(a1)
++	cfi_def_cfa(a1, 0)
++	mv sp, a3
++	jr ra
++	cfi_endproc
++	.size	GTM_longjmp, . - GTM_longjmp
++
++#ifdef __linux__
++.section .note.GNU-stack, "", @progbits
++#endif
+diff --git a/libitm/config/riscv/target.h b/libitm/config/riscv/target.h
+new file mode 100644
+index 0000000..b20de73
+--- /dev/null
++++ b/libitm/config/riscv/target.h
+@@ -0,0 +1,26 @@
++namespace GTM HIDDEN {
++
++typedef struct gtm_jmpbuf
++  {
++    long int pc;
++    void *cfa;
++    long int s[12]; /* Saved registers, s0 is fp */
++
++    /* FP saved registers */
++#if defined(__riscv_flen) && __riscv_flen == 64
++    double fs[12];
++#elif defined(__riscv_flen) && __riscv_flen == 32
++    float fs[12];
++#endif
++  } gtm_jmpbuf;
++
++/* ??? The size of one line in hardware caches (in bytes). */
++#define HW_CACHELINE_SIZE 64
++
++static inline void
++cpu_relax (void)
++{
++    __asm__ volatile ("" : : : "memory");
++}
++
++} // namespace GTM
+diff --git a/libitm/configure.tgt b/libitm/configure.tgt
+index 4c0e78c..635c1d4 100644
+--- a/libitm/configure.tgt
++++ b/libitm/configure.tgt
+@@ -82,6 +82,8 @@ EOF
+ 
+   loongarch*)   ARCH=loongarch ;;
+ 
++  riscv*)		ARCH=riscv ;;
++
+   sh*)		ARCH=sh ;;
+ 
+   sparc)
diff --git a/gcc12/riscv64.patch b/gcc12/riscv64.patch
new file mode 100644
index 000000000..19fe0f3f0
--- /dev/null
+++ b/gcc12/riscv64.patch
@@ -0,0 +1,120 @@
+--- PKGBUILD
++++ PKGBUILD
+@@ -20,7 +20,6 @@ url='https://gcc.gnu.org'
+ makedepends=(
+   binutils
+   doxygen
+-  gcc-ada
+   gcc-d
+   git
+   libisl
+@@ -39,6 +38,8 @@ options=(!emptydirs !lto)
+ _libdir=usr/lib/gcc/$CHOST/${pkgver%%+*}
+ source=(git+https://sourceware.org/git/gcc.git#commit=${_commit}
+         c89 c99
++        libitm-riscv64.patch
++        unfilter-default-library-path.patch
+ )
+ validpgpkeys=(F3691687D867B81B51CE07D9BBE43771487328A9  # bpiotrowski@archlinux.org
+               86CFFCA918CF3AF47147588051E8B148A9999C34  # evangelos@foutrelis.com
+@@ -46,7 +47,9 @@ validpgpkeys=(F3691687D867B81B51CE07D9BBE43771487328A9  # bpiotrowski@archlinux.
+               D3A93CAD751C2AF4F8C7AD516C35B99309B5FA62) # Jakub Jelinek <jakub@redhat.com>
+ sha256sums=('SKIP'
+             'de48736f6e4153f03d0a5d38ceb6c6fdb7f054e8f47ddd6af0a3dbf14f27b931'
+-            '2513c6d9984dd0a2058557bf00f06d8d5181734e41dcfe07be7ed86f2959622a')
++            '2513c6d9984dd0a2058557bf00f06d8d5181734e41dcfe07be7ed86f2959622a'
++            '8a71bbb41463fb0e8518d5cff671097704fb8b01867ea224b8ebfe6ba3e4f6d6'
++            '7183fdeea8fd148cf9dd03b0932f9d439b818a5ab3bc9a5e20d8e0b41c9e0efd')
+ 
+ prepare() {
+   [[ ! -d gcc ]] && ln -s gcc-${pkgver/+/-} gcc
+@@ -58,6 +61,12 @@ prepare() {
+   # Arch Linux installs x86_64 libraries /lib
+   sed -i '/m64=/s/lib64/lib/' gcc/config/i386/t-linux64
+ 
++  # libitm riscv
++  patch -Np1 < ../libitm-riscv64.patch
++
++  # Remove codes filtering default library paths to make mold work correctly
++  patch -Np1 < ../unfilter-default-library-path.patch
++
+   mkdir -p "$srcdir/gcc-build"
+ }
+ 
+@@ -117,6 +126,10 @@ build() {
+ 
+   # make documentation
+   make -O -C $CHOST/libstdc++-v3/doc doc-man-doxygen
++
++  # Patch spec strings embedded in binaries
++  sed -i 's/%{pthread:--push-state --as-needed -latomic --pop-state}/  --push-state --as-needed -latomic --pop-state         /' gcc/xgcc
++  sed -i 's/%{pthread:--push-state --as-needed -latomic --pop-state}/  --push-state --as-needed -latomic --pop-state         /' gcc/xg++
+ }
+ 
+ check() {
+@@ -130,12 +143,10 @@ check() {
+ package_gcc12-libs() {
+   pkgdesc='Runtime libraries shipped by GCC (12.x.x)'
+   depends=('glibc>=2.27')
+-  options=(!emptydirs !strip)
++  options=(!emptydirs !strip staticlibs)
+ 
+   cd gcc-build
+   make -C $CHOST/libgcc DESTDIR="$pkgdir" install-shared
+-  mv "${pkgdir}/${_libdir}"/../lib/* "${pkgdir}/${_libdir}"
+-  rmdir "${pkgdir}/${_libdir}"/../lib
+   rm -f "$pkgdir/$_libdir/libgcc_eh.a"
+ 
+   for lib in libatomic \
+@@ -143,9 +154,8 @@ package_gcc12-libs() {
+              libgomp \
+              libitm \
+              libquadmath \
+-             libsanitizer/{a,l,ub,t}san \
+-             libstdc++-v3/src \
+-             libvtv; do
++             libsanitizer/{a,l,ub}san \
++             libstdc++-v3/src; do
+     make -C $CHOST/$lib DESTDIR="$pkgdir" install-toolexeclibLTLIBRARIES
+   done
+ 
+@@ -158,6 +168,9 @@ package_gcc12-libs() {
+   install -Dm644 "$srcdir/gcc/COPYING.RUNTIME" \
+     "$pkgdir/usr/share/licenses/gcc12-libs/RUNTIME.LIBRARY.EXCEPTION"
+ 
++  # Remove static library (.a) files except libatomic.a
++  find "$pkgdir" -name '*.a' ! -name libatomic.a -delete
++
+   # remove conflicting files
+   rm -rf "${pkgdir}"/usr/share/locale
+ }
+@@ -175,7 +188,8 @@ package_gcc12() {
+   install -m755 -t "$pkgdir/${_libdir}/" gcc/{cc1,cc1plus,collect2,lto1,gcov{,-tool}}
+ 
+   make -C $CHOST/libgcc DESTDIR="$pkgdir" install
+-  rm -f "$pkgdir"/usr/lib/libgcc_s.so*
++  rm -rf "$pkgdir/${_libdir}"/../lib
++  rm -f "$pkgdir/${_libdir}"/libgcc_s.so*
+ 
+   make -C $CHOST/libstdc++-v3/src DESTDIR="$pkgdir" install
+   make -C $CHOST/libstdc++-v3/include DESTDIR="$pkgdir" install
+@@ -196,7 +210,6 @@ package_gcc12() {
+   make -C $CHOST/libquadmath DESTDIR="$pkgdir" install-nodist_libsubincludeHEADERS
+   make -C $CHOST/libsanitizer DESTDIR="$pkgdir" install-nodist_{saninclude,toolexeclib}HEADERS
+   make -C $CHOST/libsanitizer/asan DESTDIR="$pkgdir" install-nodist_toolexeclibHEADERS
+-  make -C $CHOST/libsanitizer/tsan DESTDIR="$pkgdir" install-nodist_toolexeclibHEADERS
+   make -C $CHOST/libsanitizer/lsan DESTDIR="$pkgdir" install-nodist_toolexeclibHEADERS
+ 
+   make -C libcpp DESTDIR="$pkgdir" install
+@@ -206,9 +219,9 @@ package_gcc12() {
+   ln -s gcc "$pkgdir"/usr/bin/cc-12
+ 
+   # create cc-rs compatible symlinks
+-  # https://github.com/rust-lang/cc-rs/blob/1.0.73/src/lib.rs#L2578-L2581
++  # https://github.com/rust-lang/cc-rs/blob/1.0.73/src/lib.rs#L2624
+   for binary in {c++,g++,gcc,gcc-ar,gcc-nm,gcc-ranlib}; do
+-    ln -s /usr/bin/${binary} "${pkgdir}"/usr/bin/x86_64-linux-gnu-${binary}-12
++    ln -s /usr/bin/${binary} "${pkgdir}"/usr/bin/riscv64-linux-gnu-${binary}-12
+   done
+ 
+   # POSIX conformance launcher scripts for c89 and c99
diff --git a/gcc12/unfilter-default-library-path.patch b/gcc12/unfilter-default-library-path.patch
new file mode 100644
index 000000000..6a944dfcb
--- /dev/null
+++ b/gcc12/unfilter-default-library-path.patch
@@ -0,0 +1,22 @@
+diff --git a/gcc/gcc.cc b/gcc/gcc.cc
+index 16bb07f2cdc..1beb23ba279 100644
+--- a/gcc/gcc.cc
++++ b/gcc/gcc.cc
+@@ -7904,17 +7904,6 @@ is_directory (const char *path1, bool linker)
+   *cp++ = '.';
+   *cp = '\0';
+ 
+-  /* Exclude directories that the linker is known to search.  */
+-  if (linker
+-      && IS_DIR_SEPARATOR (path[0])
+-      && ((cp - path == 6
+-	   && filename_ncmp (path + 1, "lib", 3) == 0)
+-	  || (cp - path == 10
+-	      && filename_ncmp (path + 1, "usr", 3) == 0
+-	      && IS_DIR_SEPARATOR (path[4])
+-	      && filename_ncmp (path + 5, "lib", 3) == 0)))
+-    return 0;
+-
+   return (stat (path, &st) >= 0 && S_ISDIR (st.st_mode));
+ }
+