diff mbox series

[10/14,LoongArch] Build Infastructure

Message ID CAKjxQHkT+QVZUfXw0G4qKXHMrV_YH-LHvmDQEoNbsH+ZxpeMEQ@mail.gmail.com
State New
Headers show
Series None | expand

Commit Message

Paul Hua Aug. 19, 2021, 4:13 a.m. UTC
From e2faaa05fd55715952410a7a3f4505584e5763e1 Mon Sep 17 00:00:00 2001
From: caiyinyu <caiyinyu@loongson.cn>
Date: Tue, 27 Jul 2021 16:02:40 +0800
Subject: [PATCH 10/14] LoongArch: Build Infastructure

        * scripts/config.guess: Modified
        * scripts/config.sub: Likewise
        * sysdeps/loongarch/Implies: New file.
        * sysdeps/loongarch/Makefile: Likewise.
        * sysdeps/loongarch/configure: Likewise.
        * sysdeps/loongarch/configure.ac: Likewise.
        * sysdeps/loongarch/lp64/Implies-after: Likewise.
        * sysdeps/loongarch/nptl/Makefile: Likewise.
        * sysdeps/loongarch/preconfigure: Likewise.
        * sysdeps/loongarch/sys/regdef.h: Likewise.
        * sysdeps/unix/sysv/linux/loongarch/Implies: Likewise.
        * sysdeps/unix/sysv/linux/loongarch/Makefile: Likewise.
        * sysdeps/unix/sysv/linux/loongarch/Versions: Likewise.
        * sysdeps/unix/sysv/linux/loongarch/configure: Likewise.
        * sysdeps/unix/sysv/linux/loongarch/configure.ac: Likewise.
        * sysdeps/unix/sysv/linux/loongarch/ldd-rewrite.sed: Likewise.
        * sysdeps/unix/sysv/linux/loongarch/lp64/Implies: Likewise.
        * sysdeps/unix/sysv/linux/loongarch/shlib-versions: Likewise.
---
 scripts/config.guess                          |   3 +
 scripts/config.sub                            |   1 +
 sysdeps/loongarch/Implies                     |   5 +
 sysdeps/loongarch/Makefile                    |  16 ++
 sysdeps/loongarch/configure                   |   4 +
 sysdeps/loongarch/configure.ac                |   6 +
 sysdeps/loongarch/lp64/Implies-after          |   1 +
 sysdeps/loongarch/nptl/Makefile               |  26 +++
 sysdeps/loongarch/preconfigure                |   9 +
 sysdeps/loongarch/sys/regdef.h                | 100 +++++++++
 sysdeps/unix/sysv/linux/loongarch/Implies     |   1 +
 sysdeps/unix/sysv/linux/loongarch/Makefile    |  16 ++
 sysdeps/unix/sysv/linux/loongarch/Versions    |  41 ++++
 sysdeps/unix/sysv/linux/loongarch/configure   | 199 ++++++++++++++++++
 .../unix/sysv/linux/loongarch/configure.ac    |  27 +++
 .../unix/sysv/linux/loongarch/ldd-rewrite.sed |   1 +
 .../unix/sysv/linux/loongarch/lp64/Implies    |   3 +
 .../unix/sysv/linux/loongarch/shlib-versions  |   1 +
 18 files changed, 460 insertions(+)
 create mode 100644 sysdeps/loongarch/Implies
 create mode 100644 sysdeps/loongarch/Makefile
 create mode 100644 sysdeps/loongarch/configure
 create mode 100644 sysdeps/loongarch/configure.ac
 create mode 100644 sysdeps/loongarch/lp64/Implies-after
 create mode 100644 sysdeps/loongarch/nptl/Makefile
 create mode 100644 sysdeps/loongarch/preconfigure
 create mode 100644 sysdeps/loongarch/sys/regdef.h
 create mode 100644 sysdeps/unix/sysv/linux/loongarch/Implies
 create mode 100644 sysdeps/unix/sysv/linux/loongarch/Makefile
 create mode 100644 sysdeps/unix/sysv/linux/loongarch/Versions
 create mode 100644 sysdeps/unix/sysv/linux/loongarch/configure
 create mode 100644 sysdeps/unix/sysv/linux/loongarch/configure.ac
 create mode 100644 sysdeps/unix/sysv/linux/loongarch/ldd-rewrite.sed
 create mode 100644 sysdeps/unix/sysv/linux/loongarch/lp64/Implies
 create mode 100644 sysdeps/unix/sysv/linux/loongarch/shlib-versions

Comments

Florian Weimer Aug. 19, 2021, 7:46 a.m. UTC | #1
* Paul Hua via Libc-alpha:

> diff --git a/sysdeps/unix/sysv/linux/loongarch/shlib-versions
> b/sysdeps/unix/sysv/linux/loongarch/shlib-versions
> new file mode 100644
> index 0000000000..0e6345b836
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/shlib-versions
> @@ -0,0 +1 @@
> +DEFAULT GLIBC_2.27

We expect that new ports start at the current glibc version, which would
be GLIBC_2.35.  Is there a particular reason why you want to stick to
glibc 2.27?

This will likely need changes to generic code, reflecting that this
architecture never had a separate libdl/libpthread/libutil.  We could
not test this configuration so far, so it's reasonable to expect that
there are some build issues.

Thanks,
Florian
diff mbox series

Patch

diff --git a/scripts/config.guess b/scripts/config.guess
index 0f9b29c884..1f73e0b06e 100755
--- a/scripts/config.guess
+++ b/scripts/config.guess
@@ -1040,6 +1040,9 @@  EOF
     riscv32:Linux:*:* | riscv64:Linux:*:*)
  echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
  exit ;;
+    loongarch32:Linux:*:* | loongarch64:Linux:*:*)
+ echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
+ exit ;;
     s390:Linux:*:* | s390x:Linux:*:*)
  echo "$UNAME_MACHINE"-ibm-linux-"$LIBC"
  exit ;;
diff --git a/scripts/config.sub b/scripts/config.sub
index a8f3f7e7cd..87d34db0f3 100755
--- a/scripts/config.sub
+++ b/scripts/config.sub
@@ -1208,6 +1208,7 @@  case $cpu-$vendor in
  | mipsisa64sr71k | mipsisa64sr71kel \
  | mipsr5900 | mipsr5900el \
  | mipstx39 | mipstx39el \
+ | loongarch32 | loongarch64 \
  | mmix \
  | mn10200 | mn10300 \
  | moxie \
diff --git a/sysdeps/loongarch/Implies b/sysdeps/loongarch/Implies
new file mode 100644
index 0000000000..c88325b8be
--- /dev/null
+++ b/sysdeps/loongarch/Implies
@@ -0,0 +1,5 @@ 
+init_array
+
+ieee754/ldbl-128
+ieee754/dbl-64
+ieee754/flt-32
diff --git a/sysdeps/loongarch/Makefile b/sysdeps/loongarch/Makefile
new file mode 100644
index 0000000000..c08dedbaaf
--- /dev/null
+++ b/sysdeps/loongarch/Makefile
@@ -0,0 +1,16 @@ 
+ifeq ($(subdir),misc)
+sysdep_headers += sys/asm.h
+endif
+
+# LoongArch's assembler also needs to know about PIC as it changes the
+# definition of some assembler macros.
+ASFLAGS-.os += $(pic-ccflag)
+
+abi-variants := lp32 lp64
+
+ifeq (,$(filter $(default-abi),$(abi-variants)))
+$(error Unknown ABI $(default-abi), must be one of $(abi-variants))
+endif
+
+abi-lp64-condition    := defined _ABILP64
+abi-lp32-condition    := defined _ABILP32
diff --git a/sysdeps/loongarch/configure b/sysdeps/loongarch/configure
new file mode 100644
index 0000000000..1e5abf81a7
--- /dev/null
+++ b/sysdeps/loongarch/configure
@@ -0,0 +1,4 @@ 
+# This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
+ # Local configure fragment for sysdeps/loongarch/elf.
+
+#AC_DEFINE(PI_STATIC_AND_HIDDEN)
diff --git a/sysdeps/loongarch/configure.ac b/sysdeps/loongarch/configure.ac
new file mode 100644
index 0000000000..67b46ce048
--- /dev/null
+++ b/sysdeps/loongarch/configure.ac
@@ -0,0 +1,6 @@ 
+GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
+# Local configure fragment for sysdeps/loongarch/elf.
+
+dnl It is always possible to access static and hidden symbols in an
+dnl position independent way.
+#AC_DEFINE(PI_STATIC_AND_HIDDEN)
diff --git a/sysdeps/loongarch/lp64/Implies-after
b/sysdeps/loongarch/lp64/Implies-after
new file mode 100644
index 0000000000..a8cae95f9d
--- /dev/null
+++ b/sysdeps/loongarch/lp64/Implies-after
@@ -0,0 +1 @@ 
+wordsize-64
diff --git a/sysdeps/loongarch/nptl/Makefile b/sysdeps/loongarch/nptl/Makefile
new file mode 100644
index 0000000000..c6c773b179
--- /dev/null
+++ b/sysdeps/loongarch/nptl/Makefile
@@ -0,0 +1,26 @@ 
+# Makefile for sysdeps/loongarch/nptl.
+# Copyright (C) 2021 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+#
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, see
+# <https://www.gnu.org/licenses/>.
+
+ifeq ($(subdir),csu)
+gen-as-const-headers += tcb-offsets.sym
+endif
+
+ifeq ($(subdir),nptl)
+libpthread-sysdep_routines += nptl-sysdep
+libpthread-shared-only-routines += nptl-sysdep
+endif
diff --git a/sysdeps/loongarch/preconfigure b/sysdeps/loongarch/preconfigure
new file mode 100644
index 0000000000..26ffe88416
--- /dev/null
+++ b/sysdeps/loongarch/preconfigure
@@ -0,0 +1,9 @@ 
+case "$machine" in
+loongarch*)
+ base_machine=loongarch
+ machine=loongarch/lp64
+ ;;
+esac
+
+#TODO: this file is useless now.
+#Maybe we can make use of it to get arch info from GCC to set env
diff --git a/sysdeps/loongarch/sys/regdef.h b/sysdeps/loongarch/sys/regdef.h
new file mode 100644
index 0000000000..fb959f3901
--- /dev/null
+++ b/sysdeps/loongarch/sys/regdef.h
@@ -0,0 +1,100 @@ 
+/* Copyright (C) 2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   Contributed by Loongson Technology Corporation Limited.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_REGDEF_H
+#define _SYS_REGDEF_H
+
+#if _LOONGARCH_SIM == _ABILP64
+#define zero $r0
+#define ra $r1
+#define tp $r2
+#define sp $r3
+#define a0 $r4
+#define a1 $r5
+#define a2 $r6
+#define a3 $r7
+#define a4 $r8
+#define a5 $r9
+#define a6 $r10
+#define a7 $r11
+#define v0 $r4
+#define v1 $r5
+#define t0 $r12
+#define t1 $r13
+#define t2 $r14
+#define t3 $r15
+#define t4 $r16
+#define t5 $r17
+#define t6 $r18
+#define t7 $r19
+#define t8 $r20
+#define x $r21
+#define fp $r22
+#define s0 $r23
+#define s1 $r24
+#define s2 $r25
+#define s3 $r26
+#define s4 $r27
+#define s5 $r28
+#define s6 $r29
+#define s7 $r30
+#define s8 $r31
+
+#define fa0 $f0
+#define fa1 $f1
+#define fa2 $f2
+#define fa3 $f3
+#define fa4 $f4
+#define fa5 $f5
+#define fa6 $f6
+#define fa7 $f7
+#define fv0 $f0
+#define fv1 $f1
+#define ft0 $f8
+#define ft1 $f9
+#define ft2 $f10
+#define ft3 $f11
+#define ft4 $f12
+#define ft5 $f13
+#define ft6 $f14
+#define ft7 $f15
+#define ft8 $f16
+#define ft9 $f17
+#define ft10 $f18
+#define ft11 $f19
+#define ft12 $f20
+#define ft13 $f21
+#define ft14 $f22
+#define ft15 $f23
+#define fs0 $f24
+#define fs1 $f25
+#define fs2 $f26
+#define fs3 $f27
+#define fs4 $f28
+#define fs5 $f29
+#define fs6 $f30
+#define fs7 $f31
+
+#elif _LOONGARCH_SIM == _ABILP32
+#error ABILP32
+#else
+#error noABI
+#endif
+
+#endif /* _SYS_REGDEF_H */
diff --git a/sysdeps/unix/sysv/linux/loongarch/Implies
b/sysdeps/unix/sysv/linux/loongarch/Implies
new file mode 100644
index 0000000000..e52b1ac310
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/loongarch/Implies
@@ -0,0 +1 @@ 
+loongarch/nptl
diff --git a/sysdeps/unix/sysv/linux/loongarch/Makefile
b/sysdeps/unix/sysv/linux/loongarch/Makefile
new file mode 100644
index 0000000000..30ac6fd497
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/loongarch/Makefile
@@ -0,0 +1,16 @@ 
+ifeq ($(subdir),elf)
+ifeq ($(build-shared),yes)
+# This is needed for DSO loading from static binaries.
+sysdep-dl-routines += dl-static
+endif
+endif
+
+#ifeq ($(subdir),misc)
+#sysdep_headers += sys/cachectl.h
+#sysdep_routines += flush-icache
+#endif
+
+ifeq ($(subdir),stdlib)
+gen-as-const-headers += ucontext_i.sym
+endif
+
diff --git a/sysdeps/unix/sysv/linux/loongarch/Versions
b/sysdeps/unix/sysv/linux/loongarch/Versions
new file mode 100644
index 0000000000..006cef5ad0
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/loongarch/Versions
@@ -0,0 +1,41 @@ 
+ld {
+  GLIBC_PRIVATE {
+    # used for loading by static libraries
+    _dl_var_init;
+  }
+}
+libc {
+  # The comment lines with "#errlist-compat" are magic; see errlist-compat.awk.
+  # When you get an error from errlist-compat.awk, you need to add a new
+  # version here.  Don't do this blindly, since this means changing the ABI
+  # for all GNU/Linux configurations.
+
+  GLIBC_2.0 {
+    #errlist-compat 123
+    _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
+
+    # Exception handling support functions from libgcc
+    __register_frame; __register_frame_table; __deregister_frame;
+    __frame_state_for; __register_frame_info_table;
+
+    # Needed by gcc:
+    _flush_cache;
+
+    # c*
+    cachectl; cacheflush;
+  }
+  GLIBC_2.2 {
+    #errlist-compat 1134
+    _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
+
+    # _*
+    _test_and_set;
+  }
+  GLIBC_2.11 {
+    fallocate64;
+  }
+  GLIBC_PRIVATE {
+    # nptl/pthread_cond_timedwait.c uses INTERNAL_VSYSCALL(clock_gettime).
+    __vdso_clock_gettime;
+  }
+}
diff --git a/sysdeps/unix/sysv/linux/loongarch/configure
b/sysdeps/unix/sysv/linux/loongarch/configure
new file mode 100644
index 0000000000..a9761a176c
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/loongarch/configure
@@ -0,0 +1,199 @@ 
+# This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
+ # Local configure fragment for sysdeps/unix/sysv/linux/loongarch.
+
+arch_minimum_kernel=4.15.0
+
+libc_cv_loongarch_int_abi=no
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that
handles long lines and -e" >&5
+$as_echo_n "checking for grep that handles long lines and -e... " >&6; }
+if ${ac_cv_path_GREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$GREP"; then
+  ac_path_GREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in grep ggrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_GREP" || continue
+# Check for GNU ac_path_GREP and select it if it is found.
+  # Check for GNU $ac_path_GREP
+case `"$ac_path_GREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'GREP' >> "conftest.nl"
+    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl"
>"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_GREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_GREP="$ac_path_GREP"
+      ac_path_GREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_GREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_GREP"; then
+    as_fn_error $? "no acceptable grep could be found in
$PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_GREP=$GREP
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
+$as_echo "$ac_cv_path_GREP" >&6; }
+ GREP="$ac_cv_path_GREP"
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
+$as_echo_n "checking for egrep... " >&6; }
+if ${ac_cv_path_EGREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
+   then ac_cv_path_EGREP="$GREP -E"
+   else
+     if test -z "$EGREP"; then
+  ac_path_EGREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in egrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_EGREP" || continue
+# Check for GNU ac_path_EGREP and select it if it is found.
+  # Check for GNU $ac_path_EGREP
+case `"$ac_path_EGREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'EGREP' >> "conftest.nl"
+    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out"
2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_EGREP="$ac_path_EGREP"
+      ac_path_EGREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_EGREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_EGREP"; then
+    as_fn_error $? "no acceptable egrep could be found in
$PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_EGREP=$EGREP
+fi
+
+   fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
+$as_echo "$ac_cv_path_EGREP" >&6; }
+ EGREP="$ac_cv_path_EGREP"
+
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+__SIZEOF_INT__ __SIZEOF_LONG__ __SIZEOF_POINTER__
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "4 4 4" >/dev/null 2>&1; then :
+  libc_cv_loongarch_int_abi=lp32
+fi
+rm -f conftest*
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+__SIZEOF_INT__ __SIZEOF_LONG__ __SIZEOF_POINTER__
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "4 8 8" >/dev/null 2>&1; then :
+  libc_cv_loongarch_int_abi=lp64
+fi
+rm -f conftest*
+
+if test $libc_cv_loongarch_int_abi = no; then
+  as_fn_error $? "Unable to determine integer ABI" "$LINENO" 5
+fi
+
+config_vars="$config_vars
+default-abi = $libc_cv_loongarch_int_abi"
+
+case $libc_cv_loongarch_int_abi in
+lp32)
+  test -n "$libc_cv_slibdir" ||
+case "$prefix" in
+/usr | /usr/)
+  libc_cv_slibdir='/lib32'
+  libc_cv_rtlddir='/lib32'
+  if test "$libdir" = '${exec_prefix}/lib'; then
+    libdir='${exec_prefix}/lib32';
+    # Locale data can be shared between 32-bit and 64-bit libraries.
+    libc_cv_complocaledir='${exec_prefix}/lib/locale'
+  fi
+  ;;
+esac
+  ;;
+lp64)
+  test -n "$libc_cv_slibdir" ||
+case "$prefix" in
+/usr | /usr/)
+  libc_cv_slibdir='/lib64'
+  libc_cv_rtlddir='/lib'
+  if test "$libdir" = '${exec_prefix}/lib'; then
+    libdir='${exec_prefix}/lib64';
+    # Locale data can be shared between 32-bit and 64-bit libraries.
+    libc_cv_complocaledir='${exec_prefix}/lib/locale'
+  fi
+  ;;
+esac
+  ;;
+esac
+
+ldd_rewrite_script=sysdeps/unix/sysv/linux/loongarch/ldd-rewrite.sed
diff --git a/sysdeps/unix/sysv/linux/loongarch/configure.ac
b/sysdeps/unix/sysv/linux/loongarch/configure.ac
new file mode 100644
index 0000000000..fef4f4d2ae
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/loongarch/configure.ac
@@ -0,0 +1,27 @@ 
+sinclude(./aclocal.m4)dnl Autoconf lossage
+GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
+# Local configure fragment for sysdeps/unix/sysv/linux/loongarch.
+
+arch_minimum_kernel=4.15.0
+
+libc_cv_loongarch_int_abi=no
+AC_EGREP_CPP(4 4 4, [__SIZEOF_INT__ __SIZEOF_LONG__ __SIZEOF_POINTER__
+  ], libc_cv_loongarch_int_abi=lp32)
+AC_EGREP_CPP(4 8 8, [__SIZEOF_INT__ __SIZEOF_LONG__ __SIZEOF_POINTER__
+  ], libc_cv_loongarch_int_abi=lp64)
+if test $libc_cv_loongarch_int_abi = no; then
+  AC_MSG_ERROR([Unable to determine integer ABI])
+fi
+
+LIBC_CONFIG_VAR([default-abi], [$libc_cv_loongarch_int_abi])
+
+case $libc_cv_loongarch_int_abi in
+lp32)
+  LIBC_SLIBDIR_RTLDDIR([lib32], [lib32])
+  ;;
+lp64)
+  LIBC_SLIBDIR_RTLDDIR([lib64], [lib])
+  ;;
+esac
+
+ldd_rewrite_script=sysdeps/unix/sysv/linux/loongarch/ldd-rewrite.sed
diff --git a/sysdeps/unix/sysv/linux/loongarch/ldd-rewrite.sed
b/sysdeps/unix/sysv/linux/loongarch/ldd-rewrite.sed
new file mode 100644
index 0000000000..131c5f147f
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/loongarch/ldd-rewrite.sed
@@ -0,0 +1 @@ 
+s_^\(RTLDLIST=\)\(.*lib/\)\(ld-linux\)-\(loongarch64\)-\(lp64\)\(d*\)\(\.so\.[0-9.]*\)_\1"\2\3-\4-\5\7
\2\3-\4-\5d\7"_
diff --git a/sysdeps/unix/sysv/linux/loongarch/lp64/Implies
b/sysdeps/unix/sysv/linux/loongarch/lp64/Implies
new file mode 100644
index 0000000000..117c2b8efe
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/loongarch/lp64/Implies
@@ -0,0 +1,3 @@ 
+unix/sysv/linux/loongarch
+unix/sysv/linux/generic
+unix/sysv/linux/wordsize-64
diff --git a/sysdeps/unix/sysv/linux/loongarch/shlib-versions
b/sysdeps/unix/sysv/linux/loongarch/shlib-versions
new file mode 100644
index 0000000000..0e6345b836
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/loongarch/shlib-versions
@@ -0,0 +1 @@ 
+DEFAULT GLIBC_2.27