graphviz @2.49.3_0 +ocaml: build fails due to unresolved memcpy call

[outis]

Building graphviz with the +ocaml variant fails, independent of what other variants are included.

The log file (also attached) has an error about being unable to match memcpy due to an argument type that appears to be the source:

[...]
:info:build ocamlc -c swig.mli
:info:build libtool: compile:  /usr/bin/clang++ -std=c++11 -DHAVE_CONFIG_H -I. -I../.. -I../../lib -I../../lib/gvc -I../../lib/common -I../../lib/cgraph -I../../lib/cdt -I../../lib/pathplan -DDEMAND_LOADING=1 -I/usr/lib/ocaml -Dint64=int64_t -I/opt/local/include -I/opt/local/lib/ocaml -isysroot/Applications/Devel/Mac/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk -I/opt/local/include -fpermissive -Wno-unused-function -Wno-unused-variable -Os -stdlib=libc++ -isysroot/Applications/Devel/Mac/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk -arch x86_64 -MT libgv_ocaml_la-gv_ocaml.lo -MD -MP -MF .deps/libgv_ocaml_la-gv_ocaml.Tpo -c gv_ocaml.cpp  -fno-common -DPIC -o .libs/libgv_ocaml_la-gv_ocaml.o
:info:build /bin/sh ../../libtool  --tag=CXX   --mode=link /usr/bin/clang++ -std=c++11  -Wno-unused-function -Os -stdlib=libc++ -isysroot/Applications/Devel/Mac/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk -arch x86_64 -module -avoid-version -L/opt/local/lib -Wl,-headerpad_max_install_names -Wl,-syslibroot,/Applications/Devel/Mac/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk -arch x86_64 -L/opt/local/lib -Wl,-headerpad_max_install_names -o libgv_go.la -rpath /opt/local/lib/graphviz/go libgv_go_la-gv.lo libgv_go_la-gv_builtins.lo libgv_go_la-gv_dummy_init.lo libgv_go_la-gv_go.lo ../../lib/gvc/libgvc.la ../../lib/cgraph/libcgraph.la ../../lib/cdt/libcdt.la  -lc
:info:build gv_ocaml.cpp:1324:2: error: no matching function for call to 'memcpy'
:info:build         memcpy(String_val(SWIG_Field(vv,0)),p,len);
:info:build         ^~~~~~
:info:build /Applications/Devel/Mac/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/include/string.h:72:7: note: candidate function not viable: no known conversion from 'const char *' to 'void *' for 1st argument
:info:build void    *memcpy(void *__dst, const void *__src, size_t __n);
:info:build          ^

System Info

• OS X 10.14.6
• XCode 10.3

[outis]

log for failing build of +ocaml variant

[ryandesign (Ryan Carsten Schmidt)]

This was a bug in swig that was fixed in swig 4.1.0 which has been available in MacPorts since December 2022.

• ​https://gitlab.com/graphviz/graphviz/-/issues/2128
• ​https://github.com/swig/swig/issues/2083
• [bbe31f82a39057dbf6cb02d95e21c6c1274b20cc/macports-ports]