diff --git a/build/unistring/build.sh b/build/unistring/build.sh
index 0bfbc3665..6678b1ff8 100755
--- a/build/unistring/build.sh
+++ b/build/unistring/build.sh
@@ -12,16 +12,18 @@
 # http://www.illumos.org/license/CDDL.
 # }}}
 #
-# Copyright 2022 OmniOS Community Edition (OmniOSce) Association.
+# Copyright 2025 OmniOS Community Edition (OmniOSce) Association.
 
 . ../../lib/build.sh
 
 PROG=unistring
-VER=1.1
+VER=1.3
 PKG=ooce/library/unistring
 SUMMARY="Unicode string manipulation library"
 DESC="libunistring - $SUMMARY"
 
+test_relver '>=' 151053 && set_clangver
+set_standard XPG6
 set_builddir lib$PROG-$VER
 
 TESTSUITE_FILTER="^[A-Z#][A-Z ]"
diff --git a/build/unistring/files/ctf.ignore b/build/unistring/files/ctf.ignore
new file mode 100644
index 000000000..29bb0d847
--- /dev/null
+++ b/build/unistring/files/ctf.ignore
@@ -0,0 +1,7 @@
+failed
+float.c
+localename-table.c
+math.c
+threadlib.c
+unistd.c
+wctype-h.c
diff --git a/build/unistring/testsuite.log b/build/unistring/testsuite.log
index 72127d27a..9877c7830 100644
--- a/build/unistring/testsuite.log
+++ b/build/unistring/testsuite.log
@@ -1,25 +1,59 @@
 PASS: test-accept
+PASS: test-alignasof
 PASS: test-alloca-opt
 PASS: test-arpa_inet
 PASS: test-array-mergesort
 PASS: test-assert
 PASS: test-binary-io.sh
 PASS: test-bind
-PASS: test-btowc1.sh
-PASS: test-btowc2.sh
+PASS: test-btoc32-1.sh
+PASS: test-btoc32-2.sh
+PASS: test-btoc32-3.sh
+PASS: test-btowc-1.sh
+PASS: test-btowc-2.sh
+PASS: test-btowc-3.sh
 PASS: test-c-ctype
 PASS: test-c-strcase.sh
+PASS: test-c32isalnum.sh
+PASS: test-c32isalpha.sh
+PASS: test-c32isblank.sh
+PASS: test-c32iscntrl.sh
+PASS: test-c32isdigit.sh
+PASS: test-c32isgraph.sh
+PASS: test-c32islower.sh
+PASS: test-c32isprint.sh
+PASS: test-c32ispunct.sh
+PASS: test-c32isspace.sh
+PASS: test-c32isupper.sh
+PASS: test-c32isxdigit.sh
+PASS: test-c32rtomb.sh
+SKIP: test-c32rtomb-w32-2.sh
+SKIP: test-c32rtomb-w32-3.sh
+SKIP: test-c32rtomb-w32-4.sh
+SKIP: test-c32rtomb-w32-5.sh
+SKIP: test-c32rtomb-w32-6.sh
+SKIP: test-c32rtomb-w32-7.sh
+SKIP: test-c32rtomb-w32-8.sh
+PASS: test-c32tolower.sh
+PASS: test-c32width
 PASS: test-calloc-gnu
+PASS: test-chdir
 PASS: test-cloexec
 PASS: test-close
 PASS: test-connect
 PASS: test-ctype
+PASS: test-dirent
+PASS: test-dirfd
+PASS: test-dup
 PASS: test-dup2
 PASS: test-environ
 PASS: test-errno
+PASS: test-error.sh
+PASS: test-fchdir
 PASS: test-fcntl-h
 PASS: test-fcntl
 PASS: test-fdopen
+PASS: test-fdopendir
 PASS: test-fgetc
 PASS: test-float
 PASS: test-fputc
@@ -29,9 +63,11 @@ PASS: test-frexp-nolibm
 PASS: test-frexpl-nolibm
 PASS: test-fseterr
 PASS: test-fstat
+PASS: test-fstatat
 PASS: test-ftruncate.sh
 PASS: test-fwrite
 PASS: test-getcwd-lgpl
+PASS: test-getcwd.sh
 PASS: test-getdtablesize
 PASS: test-getprogname
 PASS: test-gettimeofday
@@ -49,37 +85,54 @@ PASS: test-isnanf-nolibm
 PASS: test-isnanl-nolibm
 PASS: test-iswblank
 PASS: test-iswdigit.sh
+PASS: test-iswpunct.sh
 PASS: test-iswxdigit.sh
 PASS: test-langinfo
+PASS: test-largefile
 PASS: test-limits-h
 PASS: test-listen
 PASS: test-locale
 PASS: test-localename
 PASS: test-rwlock1
 PASS: test-lock
-PASS: test-once1
-PASS: test-once2
 PASS: test-lstat
 PASS: test-malloc-gnu
 PASS: test-malloca
 PASS: test-math
-PASS: test-mbrtowc1.sh
-PASS: test-mbrtowc2.sh
-SKIP: test-mbrtowc3.sh
-PASS: test-mbrtowc4.sh
-PASS: test-mbrtowc5.sh
-SKIP: test-mbrtowc-w32-1.sh
+PASS: test-mbrtoc32-1.sh
+PASS: test-mbrtoc32-2.sh
+PASS: test-mbrtoc32-3.sh
+SKIP: test-mbrtoc32-4.sh
+PASS: test-mbrtoc32-5.sh
+SKIP: test-mbrtoc32-w32-2.sh
+SKIP: test-mbrtoc32-w32-3.sh
+SKIP: test-mbrtoc32-w32-4.sh
+SKIP: test-mbrtoc32-w32-5.sh
+SKIP: test-mbrtoc32-w32-6.sh
+SKIP: test-mbrtoc32-w32-7.sh
+SKIP: test-mbrtoc32-w32-8.sh
+PASS: test-mbrtowc-1.sh
+PASS: test-mbrtowc-2.sh
+PASS: test-mbrtowc-3.sh
+SKIP: test-mbrtowc-4.sh
+PASS: test-mbrtowc-5.sh
 SKIP: test-mbrtowc-w32-2.sh
 SKIP: test-mbrtowc-w32-3.sh
 SKIP: test-mbrtowc-w32-4.sh
 SKIP: test-mbrtowc-w32-5.sh
 SKIP: test-mbrtowc-w32-6.sh
 SKIP: test-mbrtowc-w32-7.sh
+SKIP: test-mbrtowc-w32-8.sh
 PASS: test-mbsinit.sh
+PASS: test-mbsnlen.sh
 PASS: test-memchr
+PASS: test-memrchr
 PASS: test-nanosleep
 PASS: test-netinet_in
+PASS: test-once1
+PASS: test-once2
 PASS: test-open
+PASS: test-openat
 PASS: test-pathmax
 PASS: test-perror.sh
 PASS: test-perror2
@@ -87,11 +140,21 @@ PASS: test-pipe
 PASS: test-printf-frexp
 PASS: test-printf-frexpl
 PASS: test-pselect
+PASS: test-pthread-cond
 PASS: test-pthread
+PASS: test-pthread-mutex
+PASS: test-pthread-mutex-type
+PASS: test-pthread-once1
+PASS: test-pthread-once2
+PASS: test-pthread-rwlock
 PASS: test-pthread-thread
 PASS: test-pthread_sigmask1
 PASS: test-pthread_sigmask2
+PASS: test-putenv
 PASS: test-raise
+PASS: test-random
+PASS: test-random-mt
+PASS: test-random_r
 PASS: test-realloc-gnu
 PASS: test-reallocarray
 PASS: test-sched
@@ -102,6 +165,7 @@ PASS: test-setenv
 PASS: test-setlocale_null
 PASS: test-setlocale_null-mt-one
 PASS: test-setlocale_null-mt-all
+PASS: test-setlocale_null-unlocked
 PASS: test-setlocale1.sh
 PASS: test-setlocale2.sh
 PASS: test-setsockopt
@@ -112,7 +176,6 @@ PASS: test-sleep
 PASS: test-sockets
 PASS: test-stat
 PASS: test-stat-time
-PASS: test-stdalign
 PASS: test-stdbool
 PASS: test-stdckdint
 PASS: test-stddef
@@ -137,7 +200,9 @@ PASS: test-sys_uio
 PASS: test-init.sh
 PASS: test-thread_self
 PASS: test-thread_create
+PASS: test-time-h
 PASS: test-time
+PASS: test-uchar
 PASS: test-cased
 PASS: test-ignorable
 PASS: unicase/test-locale-language.sh
@@ -266,6 +331,9 @@ PASS: test-ctype_upper
 PASS: test-ctype_xdigit
 PASS: test-decdigit
 PASS: test-digit
+PASS: test-incb_byname
+PASS: test-incb_name
+PASS: test-incb_of
 PASS: test-joininggroup_byname
 PASS: test-joininggroup_name
 PASS: test-joininggroup_of
@@ -323,11 +391,14 @@ PASS: test-pr_grapheme_extend
 PASS: test-pr_grapheme_link
 PASS: test-pr_hex_digit
 PASS: test-pr_hyphen
+PASS: test-pr_id_compat_math_continue
+PASS: test-pr_id_compat_math_start
 PASS: test-pr_id_continue
 PASS: test-pr_id_start
 PASS: test-pr_ideographic
 PASS: test-pr_ids_binary_operator
 PASS: test-pr_ids_trinary_operator
+PASS: test-pr_ids_unary_operator
 PASS: test-pr_ignorable_control
 PASS: test-pr_iso_control
 PASS: test-pr_join_control
@@ -336,6 +407,7 @@ PASS: test-pr_line_separator
 PASS: test-pr_logical_order_exception
 PASS: test-pr_lowercase
 PASS: test-pr_math
+PASS: test-pr_modifier_combining_mark
 PASS: test-pr_non_break
 PASS: test-pr_not_a_character
 PASS: test-pr_numeric
@@ -351,6 +423,7 @@ PASS: test-pr_paired_punctuation
 PASS: test-pr_paragraph_separator
 PASS: test-pr_pattern_syntax
 PASS: test-pr_pattern_white_space
+PASS: test-pr_prepended_concatenation_mark
 PASS: test-pr_private_use
 PASS: test-pr_punctuation
 PASS: test-pr_quotation_mark
@@ -391,11 +464,13 @@ SKIP: unigbrk/test-ulc-grapheme-breaks.sh
 PASS: test-u16-possible-linebreaks
 PASS: test-u16-width-linebreaks
 PASS: test-u32-possible-linebreaks
+PASS: unilbrk/test-uc-possible-linebreaks.sh
 PASS: test-u32-width-linebreaks
 PASS: test-u8-possible-linebreaks
 PASS: test-u8-width-linebreaks
 PASS: test-ulc-possible-linebreaks
 PASS: test-ulc-width-linebreaks
+PASS: test-u-version
 PASS: uniname/test-uninames.sh
 PASS: test-canonical-decomposition
 PASS: test-compat-decomposition
@@ -417,6 +492,7 @@ PASS: test-u32-normcmp
 PASS: test-u32-normcoll
 PASS: test-u8-normcmp
 PASS: test-u8-normcoll
+PASS: test-dup-safer
 PASS: test-unistd
 PASS: test-u16-asnprintf1
 PASS: test-u16-vasnprintf1
@@ -459,6 +535,7 @@ PASS: test-u16-mbtouc-unsafe
 PASS: test-u16-mbtoucr
 PASS: test-u16-move
 PASS: test-u16-next
+PASS: test-u16-pcpy
 PASS: test-u16-prev
 PASS: test-u16-set
 PASS: test-u16-stpcpy
@@ -494,6 +571,7 @@ PASS: test-u32-mbtouc-unsafe
 PASS: test-u32-mbtoucr
 PASS: test-u32-move
 PASS: test-u32-next
+PASS: test-u32-pcpy
 PASS: test-u32-prev
 PASS: test-u32-set
 PASS: test-u32-stpcpy
@@ -529,6 +607,7 @@ PASS: test-u8-mbtouc-unsafe
 PASS: test-u8-mbtoucr
 PASS: test-u8-move
 PASS: test-u8-next
+PASS: test-u8-pcpy
 PASS: test-u8-prev
 PASS: test-u8-set
 PASS: test-u8-stpcpy
@@ -570,19 +649,23 @@ PASS: test-verify
 PASS: test-verify.sh
 PASS: test-wchar
 PASS: test-wcrtomb.sh
-SKIP: test-wcrtomb-w32-1.sh
 SKIP: test-wcrtomb-w32-2.sh
 SKIP: test-wcrtomb-w32-3.sh
 SKIP: test-wcrtomb-w32-4.sh
 SKIP: test-wcrtomb-w32-5.sh
 SKIP: test-wcrtomb-w32-6.sh
 SKIP: test-wcrtomb-w32-7.sh
+SKIP: test-wcrtomb-w32-8.sh
 PASS: test-wctype-h
 PASS: test-wcwidth
+SKIP: test-windows-mutex-type
+SKIP: test-windows-recmutex-type
+SKIP: test-windows-timedmutex-type
+SKIP: test-windows-timedrecmutex-type
 PASS: test-xalloc-die.sh
-# TOTAL: 582
-# PASS:  566
-# SKIP:  16
+# TOTAL: 665
+# PASS:  630
+# SKIP:  35
 # XFAIL: 0
 # FAIL:  0
 # XPASS: 0
diff --git a/doc/packages.md b/doc/packages.md
index 55a4f873d..9d53f5568 100644
--- a/doc/packages.md
+++ b/doc/packages.md
@@ -146,7 +146,7 @@
 | ooce/library/slang		| 2.3.3		| https://www.jedsoft.org/releases/slang/ | [omniosorg](https://github.com/omniosorg)
 | ooce/library/tiff		| 4.7.0		| https://download.osgeo.org/libtiff/ https://libtiff.gitlab.io/libtiff/ | [omniosorg](https://github.com/omniosorg)
 | ooce/library/tree-sitter	| 0.24.6	| https://github.com/tree-sitter/tree-sitter/releases | [omniosorg](https://github.com/omniosorg)
-| ooce/library/unistring	| 1.1		| https://ftp.gnu.org/gnu/libunistring/ | [omniosorg](https://github.com/omniosorg)
+| ooce/library/unistring	| 1.3		| https://ftp.gnu.org/gnu/libunistring/ | [omniosorg](https://github.com/omniosorg)
 | ooce/library/yaml		| 0.2.5		| https://github.com/yaml/libyaml/releases | [omniosorg](https://github.com/omniosorg)
 | ooce/multimedia/dav1d		| 1.5.0		| https://downloads.videolan.org/pub/videolan/dav1d/ https://www.videolan.org/projects/dav1d.html | [omniosorg](https://github.com/omniosorg)
 | ooce/multimedia/dcraw		| 9.28.0	| https://www.dechifro.org/dcraw/archive/ | [omniosorg](https://github.com/omniosorg)