diff -Naur e2fsprogs-1.46.0.org/aclocal.m4 e2fsprogs-1.46.0.sw/aclocal.m4
--- e2fsprogs-1.46.0.org/aclocal.m4	2021-01-30 06:02:31.000000000 +0800
+++ e2fsprogs-1.46.0.sw/aclocal.m4	2023-05-15 10:30:36.732214747 +0800
@@ -978,6 +978,13 @@
          ;;
 
 changequote(,)dnl
+       sw_64* )
+changequote([,])dnl
+         gl_cv_host_cpu_c_abi=sw_64
+	;;
+
+
+changequote(,)dnl
        alphaev[4-8] | alphaev56 | alphapca5[67] | alphaev6[78] )
 changequote([,])dnl
          gl_cv_host_cpu_c_abi=alpha
@@ -1242,6 +1249,9 @@
 #ifndef __x86_64__
 #undef __x86_64__
 #endif
+#ifndef __sw_64__
+#undef __sw_64__
+#endif
 #ifndef __alpha__
 #undef __alpha__
 #endif
@@ -1355,7 +1365,7 @@
        case "$gl_cv_host_cpu_c_abi" in
          i386 | x86_64-x32 | arm | armhf | arm64-ilp32 | hppa | ia64-ilp32 | mips | mipsn32 | powerpc | riscv*-ilp32* | s390 | sparc)
            gl_cv_host_cpu_c_abi_32bit=yes ;;
-         x86_64 | alpha | arm64 | hppa64 | ia64 | mips64 | powerpc64 | powerpc64-elfv2 | riscv*-lp64* | s390x | sparc64 )
+         x86_64 | alpha | sw_64 | arm64 | hppa64 | ia64 | mips64 | powerpc64 | powerpc64-elfv2 | riscv*-lp64* | s390x | sparc64 )
            gl_cv_host_cpu_c_abi_32bit=no ;;
          *)
            gl_cv_host_cpu_c_abi_32bit=unknown ;;
@@ -1385,7 +1395,7 @@
 
          # CPUs that only support a 64-bit ABI.
 changequote(,)dnl
-         alpha | alphaev[4-8] | alphaev56 | alphapca5[67] | alphaev6[78] \
+         alpha | sw_64 | alphaev[4-8] | alphaev56 | alphapca5[67] | alphaev6[78] \
          | mmix )
 changequote([,])dnl
            gl_cv_host_cpu_c_abi_32bit=no
diff -Naur e2fsprogs-1.46.0.org/configure e2fsprogs-1.46.0.sw/configure
--- e2fsprogs-1.46.0.org/configure	2021-01-30 06:02:31.000000000 +0800
+++ e2fsprogs-1.46.0.sw/configure	2023-05-15 10:32:13.884627483 +0800
@@ -4452,7 +4452,7 @@
 if test "$GCC" = yes
 then
     case "$host_cpu" in
-	alpha)		addcflags="-mieee" ;;
+	alpha | sw_64)		addcflags="-mieee" ;;
     esac
 fi
 if test "x$addcflags" != x
@@ -7542,7 +7542,7 @@
        case "$gl_cv_host_cpu_c_abi" in
          i386 | x86_64-x32 | arm | armhf | arm64-ilp32 | hppa | ia64-ilp32 | mips | mipsn32 | powerpc | riscv*-ilp32* | s390 | sparc)
            gl_cv_host_cpu_c_abi_32bit=yes ;;
-         x86_64 | alpha | arm64 | hppa64 | ia64 | mips64 | powerpc64 | powerpc64-elfv2 | riscv*-lp64* | s390x | sparc64 )
+         x86_64 | alpha | sw_64 | arm64 | hppa64 | ia64 | mips64 | powerpc64 | powerpc64-elfv2 | riscv*-lp64* | s390x | sparc64 )
            gl_cv_host_cpu_c_abi_32bit=no ;;
          *)
            gl_cv_host_cpu_c_abi_32bit=unknown ;;
diff -Naur e2fsprogs-1.46.0.org/configure.ac e2fsprogs-1.46.0.sw/configure.ac
--- e2fsprogs-1.46.0.org/configure.ac	2021-01-30 06:02:31.000000000 +0800
+++ e2fsprogs-1.46.0.sw/configure.ac	2023-05-15 10:30:56.830920770 +0800
@@ -113,7 +113,7 @@
 if test "$GCC" = yes
 then
     case "$host_cpu" in
-	alpha)		addcflags="-mieee" ;;
+	alpha | sw_64)		addcflags="-mieee" ;;
     esac
 fi
 if test "x$addcflags" != x
diff -Naur e2fsprogs-1.46.0.org/debian/attic/libs/rules e2fsprogs-1.46.0.sw/debian/attic/libs/rules
--- e2fsprogs-1.46.0.org/debian/attic/libs/rules	2021-01-30 06:02:31.000000000 +0800
+++ e2fsprogs-1.46.0.sw/debian/attic/libs/rules	2023-05-15 10:34:10.450722173 +0800
@@ -33,6 +33,14 @@
 installdoc = install -m 644
 installbin = install -m 755
 
+ifeq ($(ARCH),sw_64)
+CCOPTS = -g -O2 -fsigned-char -DHAVE_NETINET_IN_H
+LIBC-DEV = libc6.1-dev
+else
+CCOPTS = -g -O2 -fsigned-char
+LIBC-DEV = libc6-dev
+endif
+
 ifeq ($(ARCH),alpha)
 CCOPTS = -g -O2 -fsigned-char -DHAVE_NETINET_IN_H
 LIBC-DEV = libc6.1-dev
diff -Naur e2fsprogs-1.46.0.org/lib/blkid/llseek.c e2fsprogs-1.46.0.sw/lib/blkid/llseek.c
--- e2fsprogs-1.46.0.org/lib/blkid/llseek.c	2021-01-30 06:02:31.000000000 +0800
+++ e2fsprogs-1.46.0.sw/lib/blkid/llseek.c	2023-05-15 10:31:23.610861491 +0800
@@ -88,7 +88,7 @@
 	return (retval == -1 ? (blkid_loff_t) retval : result);
 }
 
-#endif	/* __alpha__ || __ia64__ */
+#endif	/* __alpha__ || __sw_64__  ||  __ia64__ */
 
 #endif /* HAVE_LLSEEK */
 
diff -Naur e2fsprogs-1.46.0.org/lib/ext2fs/unix_io.c e2fsprogs-1.46.0.sw/lib/ext2fs/unix_io.c
--- e2fsprogs-1.46.0.org/lib/ext2fs/unix_io.c	2021-01-30 06:02:31.000000000 +0800
+++ e2fsprogs-1.46.0.sw/lib/ext2fs/unix_io.c	2023-05-15 10:34:28.790366402 +0800
@@ -742,7 +742,7 @@
 
 #ifdef __linux__
 #undef RLIM_INFINITY
-#if (defined(__alpha__) || ((defined(__sparc__) || defined(__mips__)) && (SIZEOF_LONG == 4)))
+#if (defined(__alpha__) || defined(__sw_64__) || ((defined(__sparc__) || defined(__mips__)) && (SIZEOF_LONG == 4)))
 #define RLIM_INFINITY	((unsigned long)(~0UL>>1))
 #else
 #define RLIM_INFINITY  (~0UL)