openjdk17: fix build for clang 16 (macports#26099)

closes https://trac.macports.org/ticket/70918

Author: breun

java/openjdk17/Portfile

@@ -6,7 +6,7 @@ name                openjdk17
 # See https://openjdk-sources.osci.io/openjdk17/ for the version and build number that matches the latest '-ga' version
 version             17.0.12
 set build 7
-revision            0
+revision            1
 categories          java devel
 supported_archs     x86_64 arm64
 license             GPL-2+
@@ -36,6 +36,9 @@ pre-patch {
     reinplace "s|xmacosx|xwindows|g" ${worksrcpath}/make/autoconf/lib-freetype.m4
 }
 
+# Temporary workaround for clang 16: https://trac.macports.org/ticket/70819
+patchfiles          JDK-8340341-clang-16-workaround.patch
+
 set tpath ${prefix}/Library/Java
 use_xcode           yes
 use_configure    yes

java/openjdk17/files/JDK-8340341-clang-16-workaround.patch

@@ -0,0 +1,14 @@
+--- make/hotspot/lib/JvmOverrideFiles.gmk.orig	2024-06-04 18:47:50
++++ make/hotspot/lib/JvmOverrideFiles.gmk	2024-09-22 23:45:41
+@@ -89,6 +89,11 @@
+     # for the clang bug was still needed.
+     BUILD_LIBJVM_loopTransform.cpp_CXXFLAGS := $(CXX_O_FLAG_NONE)
+ 
++    # See JDK-8340341
++    ifeq "$(firstword $(subst ., ,$(CXX_VERSION_NUMBER)))" "16"
++      BUILD_LIBJVM_stackMapTable.cpp_CXXFLAGS := "-O1"
++    endif
++
+     # The following files are compiled at various optimization
+     # levels due to optimization issues encountered at the
+     # default level. The Clang compiler issues a compile