[MacPorts] #39664: mosml-dynlibs does not build: lvalue required as left operand of assignment

[MacPorts]

#39664: mosml-dynlibs does not build: lvalue required as left operand of assignment
----------------------------+--------------------------------
  Reporter:  ryandesign     |      Owner:  macports-tickets@…
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.1.3
Resolution:                 |   Keywords:
      Port:  mosml-dynlibs  |
----------------------------+--------------------------------

Comment (by barracuda156):

 Ha, I thought this error was fixed in the source, but no: while gcc-4.2
 builds it fine, gcc-12 errs out, like clang.
 {{{
 make[1]: Entering directory
 `/opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_lang_mosml/mosml-
 dynlibs/work/mosml-
 13c581aec46eea134e478f2e2b6456278e36ecce/src/dynlibs/mmysql'
 /opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_lang_mosml/mosml-
 dynlibs/work/compwrap/cc/opt/local/bin/gcc-mp-12 -Dunix -O2 -fno-defer-pop
 -I/opt/local/include/mosml -I /opt/local/include/mysql57/mysql -c -o
 mmysql.o mmysql.c
 mmysql.c: In function 'dbresult_finalize':
 mmysql.c:79:28: error: lvalue required as left operand of assignment
    79 |     DBresult_val(dbresval) = NULL;
       |                            ^
 mmysql.c:81:33: error: lvalue required as left operand of assignment
    81 |     DBresultindex_val(dbresval) = NULL;
       |                                 ^
 }}}

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Ticket URL: <https://trac.macports.org/ticket/39664#comment:1>
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