XDR compile warnings cause test failures on mac

With the upgrade of the compiler stack, the custom casting between functions done for xdr is flagged as 'incompatible'

I imagine this is a false positive otherwise we would have been bitten already by this

../src/utils/xdr_cxx.C:565:12: error: cast from 'int (*)(XDR *, int *)' (aka 'int (*)(__rpc_xdr *, int *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  565 |     return (xdrproc_t)(xdr_int);
      |            ^~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:567:12: error: cast from 'int (*)(XDR *, quad_t *)' (aka 'int (*)(__rpc_xdr *, long long *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  567 |     return (xdrproc_t)(xdr_longlong_t);
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:569:12: error: cast from 'int (*)(XDR *, int *)' (aka 'int (*)(__rpc_xdr *, int *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  569 |     return (xdrproc_t)(xdr_long);
      |            ^~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:580:12: error: cast from 'int (*)(XDR *, unsigned int *)' (aka 'int (*)(__rpc_xdr *, unsigned int *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  580 |     return (xdrproc_t)(xdr_u_int);
      |            ^~~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:582:12: error: cast from 'int (*)(XDR *, unsigned int *)' (aka 'int (*)(__rpc_xdr *, unsigned int *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  582 |     return (xdrproc_t)(xdr_u_long);
      |            ^~~~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:584:12: error: cast from 'int (*)(XDR *, u_quad_t *)' (aka 'int (*)(__rpc_xdr *, unsigned long long *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  584 |     return (xdrproc_t)(xdr_u_longlong_t);
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:595:12: error: cast from 'int (*)(XDR *, int *)' (aka 'int (*)(__rpc_xdr *, int *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  595 |     return (xdrproc_t)(xdr_long);
      |            ^~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:597:12: error: cast from 'int (*)(XDR *, quad_t *)' (aka 'int (*)(__rpc_xdr *, long long *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  597 |     return (xdrproc_t)(xdr_longlong_t);
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:608:12: error: cast from 'int (*)(XDR *, unsigned int *)' (aka 'int (*)(__rpc_xdr *, unsigned int *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  608 |     return (xdrproc_t)(xdr_u_long);
      |            ^~~~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:610:12: error: cast from 'int (*)(XDR *, u_quad_t *)' (aka 'int (*)(__rpc_xdr *, unsigned long long *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  610 |     return (xdrproc_t)(xdr_u_longlong_t);
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:624:48: error: cast from 'int (*)(XDR *, quad_t *)' (aka 'int (*)(__rpc_xdr *, long long *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  624 | xdrproc_t xdr_translator<long long>() { return (xdrproc_t)(xdr_longlong_t); }
      |                                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:627:57: error: cast from 'int (*)(XDR *, u_quad_t *)' (aka 'int (*)(__rpc_xdr *, unsigned long long *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  627 | xdrproc_t xdr_translator<unsigned long long>() { return (xdrproc_t)(xdr_u_longlong_t); }
      |                                                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:630:48: error: cast from 'int (*)(XDR *, short *)' (aka 'int (*)(__rpc_xdr *, short *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  630 | xdrproc_t xdr_translator<short int>() { return (xdrproc_t)(xdr_short); }
      |                                                ^~~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:633:57: error: cast from 'int (*)(XDR *, unsigned short *)' (aka 'int (*)(__rpc_xdr *, unsigned short *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  633 | xdrproc_t xdr_translator<unsigned short int>() { return (xdrproc_t)(xdr_u_short); }
      |                                                         ^~~~~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:636:43: error: cast from 'int (*)(XDR *, char *)' (aka 'int (*)(__rpc_xdr *, char *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  636 | xdrproc_t xdr_translator<char>() { return (xdrproc_t)(xdr_char); }
      |                                           ^~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:639:50: error: cast from 'int (*)(XDR *, char *)' (aka 'int (*)(__rpc_xdr *, char *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  639 | xdrproc_t xdr_translator<signed char>() { return (xdrproc_t)(xdr_char); }
      |                                                  ^~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:642:52: error: cast from 'int (*)(XDR *, unsigned char *)' (aka 'int (*)(__rpc_xdr *, unsigned char *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  642 | xdrproc_t xdr_translator<unsigned char>() { return (xdrproc_t)(xdr_u_char); }
      |                                                    ^~~~~~~~~~~~~~~~~~~~~~~
../src/utils/xdr_cxx.C:645:44: error: cast from 'int (*)(XDR *, float *)' (aka 'int (*)(__rpc_xdr *, float *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  645 | xdrproc_t xdr_translator<float>() { return (xdrproc_t)(xdr_float); }
      |                                            ^~~~~~~~~~~~~~~~~~~~~~
../src/utils/g:648:45: error: cast from 'int (*)(XDR *, double *)' (aka 'int (*)(__rpc_xdr *, double *)') to 'xdrproc_t' (aka 'int (*)(__rpc_xdr *, void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
  648 | xdrproc_t xdr_translator<double>() { return (xdrproc_t)(xdr_double); }
      |                                             ^~~~~~~~~~~~~~~~~~~~~~~
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
make[1]: *** [Makefile:31057: src/utils/libmesh_opt_la-xdr_cxx.lo] Error 1
make[1]: *** Waiting for unfinished jobs....
mv -f src/utils/.deps/libmesh_opt_la-utility.Tpo src/utils/.deps/libmesh_opt_la-utility.Plo
mv -f src/utils/.deps/libmesh_opt_la-topology_map.Tpo src/utils/.deps/libmesh_opt_la-topology_map.Plo
mv -f src/utils/.deps/libmesh_opt_la-tree.Tpo src/utils/.deps/libmesh_opt_la-tree.Plo
mv -f src/utils/.deps/libmesh_opt_la-tree_node.Tpo src/utils/.deps/libmesh_opt_la-tree_node.Plo
mv -f src/utils/.deps/libmesh_opt_la-string_to_enum.Tpo src/utils/.deps/libmesh_opt_la-string_to_enum.Plo
mv -f src/systems/.deps/libmesh_opt_la-system_projection.Tpo src/systems/.deps/libmesh_opt_la-system_projection.Plo
make[1]: Leaving directory '/opt/civet0/build_0/libmesh/build'
make: *** [Makefile:35333: all-recursive] Error 1
[15:41:52] ERROR: Exiting with code 2

Resolve test failures on mac:

Add shims for XDR functions on OSX

I can actually replicate this on my Macbook, no specific conda environment needed. Trying out some fix ideas now.

Add shims for XDR functions on OSX

On my Mac, /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/rpc/xdr.h defines
extern bool_t xdr_long(XDR *, int *);, reserving extern bool_t xdr_long(XDR *, long *); for the ifndef __LP64__ branch. int and long are different sizes, so on my system these definitions are incompatible. xdr_long should OBVIOUSLY always be using long, that being the ENTIRE REASON WHY THAT FUNCTION EXISTS.

Is there any way to do git blame on the OSX SDK?

Add shims for XDR functions on OSX

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XDR compile warnings cause test failures on mac #4387

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XDR compile warnings cause test failures on mac #4387

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roystgnr commented on Feb 5, 2026

roystgnr commented on Feb 5, 2026

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