Ticket #42938: Portfile.2.diff

Portfile

@@ -7 +7 @@
 set name_mysql      ${name}
 version             5.6.16
 # Set revision_client and revision_server to 0 on version bump.
-set revision_client 1
+set revision_client 2
 set revision_server 0
 set version_branch  [join [lrange [split ${version} .] 0 1] .]
 categories          databases
@@ -99 +99 @@
     if {[string match *clang* ${configure.cxx}] &&
               ${os.major} >= 13} {
 
-        configure.args-append \
-                        -DCMAKE_CXX_FLAGS:STRING="-stdlib=libstdc++"
+        configure.cxxflags-append \
+                        -stdlib=libstdc++
     }
 
     post-build {