diff --git a/build/gcc10/build.sh b/build/gcc10/build.sh
index 674a75b0a9..e5a361a0a9 100755
--- a/build/gcc10/build.sh
+++ b/build/gcc10/build.sh
@@ -21,7 +21,7 @@
 PKG=developer/gcc10
 PROG=gcc
 VER=10.5.0
-ILVER=il-1
+ILVER=il-2
 SUMMARY="gcc $VER-$ILVER"
 DESC="The GNU Compiler Collection"
 
diff --git a/build/gcc10/patches/0038-16768-kernel-printf-should-know-about-j-and-z-size-s.patch b/build/gcc10/patches/0038-16768-kernel-printf-should-know-about-j-and-z-size-s.patch
new file mode 100644
index 0000000000..eda3e12e3b
--- /dev/null
+++ b/build/gcc10/patches/0038-16768-kernel-printf-should-know-about-j-and-z-size-s.patch
@@ -0,0 +1,60 @@
+From 640cc111a1e8f2ea03f773ccf4619b66dddbb5e4 Mon Sep 17 00:00:00 2001
+From: Andy Fiddaman <illumos@fiddaman.net>
+Date: Tue, 15 Oct 2024 15:31:19 +0000
+Subject: 16768 kernel printf should know about %j and %z size
+ specifiers
+
+---
+ gcc/config/sol2-c.c                     | 9 +++++----
+ gcc/testsuite/gcc.dg/format/cmn-err-1.c | 4 ++++
+ 2 files changed, 9 insertions(+), 4 deletions(-)
+
+diff --git a/gcc/config/sol2-c.c b/gcc/config/sol2-c.c
+index 5419e0436944..037baa604131 100644
+--- a/gcc/config/sol2-c.c
++++ b/gcc/config/sol2-c.c
+@@ -37,6 +37,8 @@ static const format_length_info cmn_err_length_specs[] =
+ {
+   { "h", FMT_LEN_h, STD_C89, "hh", FMT_LEN_hh, STD_C99, 0 },
+   { "l", FMT_LEN_l, STD_C89, "ll", FMT_LEN_ll, STD_C89, 0 },
++  { "j", FMT_LEN_j, STD_C99, NO_FMT, 0 },
++  { "z", FMT_LEN_z, STD_C99, NO_FMT, 0 },
+   { NO_FMT, NO_FMT, 0 }
+ };
+ 
+@@ -63,10 +65,9 @@ static const format_char_info bitfield_string_type =
+ static const format_char_info cmn_err_char_table[] =
+ {
+   /*                     none     hh       h        l        ll       L        z        t        j        H       D       DD */
+-  /* C89 conversion specifiers.  */
+-  { "dD",  0, STD_C89, { T89_I,   T99_SC,  T89_S,   T89_L,   T9L_LL,  BADLEN,  BADLEN,  BADLEN,  BADLEN , BADLEN, BADLEN, BADLEN }, "-wp0", "",   NULL },
+-  { "oOxX",0, STD_C89, { T89_UI,  T99_UC,  T89_US,  T89_UL,  T9L_ULL, BADLEN,  BADLEN,  BADLEN,  BADLEN , BADLEN, BADLEN, BADLEN }, "-wp0", "",   NULL },
+-  { "u",   0, STD_C89, { T89_UI,  T99_UC,  T89_US,  T89_UL,  T9L_ULL, BADLEN,  BADLEN,  BADLEN,  BADLEN , BADLEN, BADLEN, BADLEN }, "-wp0", "",   NULL },
++  { "dD",  0, STD_C89, { T89_I,   T99_SC,  T89_S,   T89_L,   T9L_LL,  BADLEN,  T99_SST, BADLEN,  T99_IM , BADLEN, BADLEN, BADLEN }, "-wp0", "",   NULL },
++  { "oOxX",0, STD_C89, { T89_UI,  T99_UC,  T89_US,  T89_UL,  T9L_ULL, BADLEN,  T99_ST,  BADLEN,  T99_UIM, BADLEN, BADLEN, BADLEN }, "-wp0", "",   NULL },
++  { "u",   0, STD_C89, { T89_UI,  T99_UC,  T89_US,  T89_UL,  T9L_ULL, BADLEN,  T99_ST,  BADLEN,  T99_UIM, BADLEN, BADLEN, BADLEN }, "-wp0", "",   NULL },
+   { "c",   0, STD_C89, { T89_C,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN , BADLEN, BADLEN, BADLEN }, "-w",   "",   NULL },
+   { "p",   1, STD_C89, { T89_V,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN , BADLEN, BADLEN, BADLEN }, "-w",   "c",  NULL },
+   { "s",   1, STD_C89, { T89_C,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN , BADLEN, BADLEN, BADLEN }, "-wp",  "cR", NULL },
+diff --git a/gcc/testsuite/gcc.dg/format/cmn-err-1.c b/gcc/testsuite/gcc.dg/format/cmn-err-1.c
+index f6833c1723ad..cbb4a1f927c3 100644
+--- a/gcc/testsuite/gcc.dg/format/cmn-err-1.c
++++ b/gcc/testsuite/gcc.dg/format/cmn-err-1.c
+@@ -19,6 +19,8 @@ int main()
+   llong ll = 3;
+   char hh = 4;
+   short h = 5;
++  size_t z = 6;
++  uintmax_t j = 7;
+ 
+   cmn_err_func (0, "%s", string);
+   cmn_err_func (0, "%d %D %o %O %x %X %u", i, i, i, i, i, i, i);
+@@ -28,6 +30,8 @@ int main()
+   cmn_err_func (0, "%hd %hD %ho %hO %hx %hX %hu", h, h, h, h, h, h, h);
+   cmn_err_func (0, "%hhd %hhD %hho %hhO %hhx %hhX %hhu",
+ 		hh, hh, hh, hh, hh, hh, hh);
++  cmn_err_func (0, "%jd %jD %jo %jO %jx %jX %ju", j, j, j, j, j, j, j);
++  cmn_err_func (0, "%zd %zD %zo %zO %zx %zX %zu", z, z, z, z, z, z, z);
+   cmn_err_func (0, "%b %s", i, "\01Foo", string);
+   cmn_err_func (0, "%p", string);
+   cmn_err_func (0, "%16b", i, "\01Foo");
diff --git a/build/gcc10/patches/0038-OOCE-Adjust-default-library-paths-for-OmniOS.patch b/build/gcc10/patches/0039-OOCE-Adjust-default-library-paths-for-OmniOS.patch
similarity index 95%
rename from build/gcc10/patches/0038-OOCE-Adjust-default-library-paths-for-OmniOS.patch
rename to build/gcc10/patches/0039-OOCE-Adjust-default-library-paths-for-OmniOS.patch
index 193c6af34a..b401707536 100644
--- a/build/gcc10/patches/0038-OOCE-Adjust-default-library-paths-for-OmniOS.patch
+++ b/build/gcc10/patches/0039-OOCE-Adjust-default-library-paths-for-OmniOS.patch
@@ -1,4 +1,4 @@
-From 28faf43be064f62ab42667a25bd626ba6f123d6a Mon Sep 17 00:00:00 2001
+From 0573580c97961bf1dbfcce097e55c1e842c3f65d Mon Sep 17 00:00:00 2001
 From: Andy Fiddaman <omnios@citrus-it.co.uk>
 Date: Thu, 9 May 2019 13:43:30 +0000
 Subject: OOCE: Adjust default library paths for OmniOS
diff --git a/build/gcc10/patches/series b/build/gcc10/patches/series
index dca17950a9..8fc90393a9 100644
--- a/build/gcc10/patches/series
+++ b/build/gcc10/patches/series
@@ -34,4 +34,5 @@
 0035-Add-__illumos__-preprocessor-definition.patch
 0036-libstdc-must-use-thread-local-errno.patch
 0037-cmn_err-supports-h-and-hh.patch
-0038-OOCE-Adjust-default-library-paths-for-OmniOS.patch
+0038-16768-kernel-printf-should-know-about-j-and-z-size-s.patch
+0039-OOCE-Adjust-default-library-paths-for-OmniOS.patch