diff --git a/libgcc/Makefile.in b/libgcc/Makefile.in
index f09b39b..296cf0f 100644
--- a/libgcc/Makefile.in
+++ b/libgcc/Makefile.in
@@ -43,6 +43,7 @@ enable_vtable_verify = @enable_vtable_verify@
 enable_decimal_float = @enable_decimal_float@
 fixed_point = @fixed_point@
 with_aix_soname = @with_aix_soname@
+with_ldbl128 = @with_ldbl128@
 
 host_noncanonical = @host_noncanonical@
 real_host_noncanonical = @real_host_noncanonical@
diff --git a/libgcc/config/rs6000/t-linux b/libgcc/config/rs6000/t-linux
index 4f6d4c4..c50dd94 100644
--- a/libgcc/config/rs6000/t-linux
+++ b/libgcc/config/rs6000/t-linux
@@ -1,3 +1,6 @@
 SHLIB_MAPFILES += $(srcdir)/config/rs6000/libgcc-glibc.ver
 
-HOST_LIBGCC2_CFLAGS += -mlong-double-128 -mno-minimal-toc
+ifeq ($(with_ldbl128),yes)
+HOST_LIBGCC2_CFLAGS += -mlong-double-128
+endif
+HOST_LIBGCC2_CFLAGS += -mno-minimal-toc
diff --git a/libgcc/configure b/libgcc/configure
old mode 100644
new mode 100755
index e7d6c75..e9a9019
--- a/libgcc/configure
+++ b/libgcc/configure
@@ -614,6 +614,7 @@ build_vendor
 build_cpu
 build
 with_aix_soname
+with_ldbl128
 enable_vtable_verify
 enable_shared
 libgcc_topdir
@@ -663,6 +664,7 @@ with_cross_host
 with_ld
 enable_shared
 enable_vtable_verify
+with_long_double_128
 with_aix_soname
 enable_version_specific_runtime_libs
 with_slibdir
@@ -1319,6 +1321,7 @@ Optional Packages:
   --with-target-subdir=SUBDIR      Configuring in a subdirectory for target
   --with-cross-host=HOST           Configuring with a cross compiler
   --with-ld               arrange to use the specified ld (full pathname)
+  --with-long-double-128  use 128-bit long double by default
   --with-aix-soname=aix|svr4|both
                           shared library versioning (aka "SONAME") variant to
                           provide on AIX
@@ -2201,6 +2204,21 @@ fi
 
 
 
+# Check whether --with-long-double-128 was given.
+if test "${with_long_double_128+set}" = set; then :
+  withval=$with_long_double_128; with_ldbl128="$with_long_double_128"
+else
+  case "${host}" in
+ power*-*-musl*)
+   with_ldbl128="no";;
+ *) with_ldbl128="yes";;
+ esac
+
+fi
+
+
+
+
 # Check whether --with-aix-soname was given.
 if test "${with_aix_soname+set}" = set; then :
   withval=$with_aix_soname; case "${host}:${enable_shared}" in
diff --git a/libgcc/configure.ac b/libgcc/configure.ac
index 269997f..81dc3ba 100644
--- a/libgcc/configure.ac
+++ b/libgcc/configure.ac
@@ -77,6 +77,18 @@ AC_ARG_ENABLE(vtable-verify,
 [enable_vtable_verify=no])
 AC_SUBST(enable_vtable_verify)
 
+AC_ARG_WITH(long-double-128,
+[AS_HELP_STRING([--with-long-double-128],
+    [use 128-bit long double by default])],
+      with_ldbl128="$with_long_double_128",
+[case "${host}" in
+ power*-*-musl*)
+   with_ldbl128="no";;
+ *) with_ldbl128="yes";;
+ esac
+])
+AC_SUBST(with_ldbl128)
+
 AC_ARG_WITH(aix-soname,
 [AS_HELP_STRING([--with-aix-soname=aix|svr4|both],
     [shared library versioning (aka "SONAME") variant to provide on AIX])],