R_CMethodDef Declaration

[wrathematics]

In src/init.c, you don't specify the fourth field of your R_CMethodDef declaration. If you compile with -Wmissing-field-initializers in gcc, you will see the warning:

init.c:18:5: warning: missing initializer for field ‘types’ of ‘R_CMethodDef {aka const struct <anonymous>}’ [-Wmissing-field-initializers]
     {"C_polygauss", (DL_FUNC) &C_polygauss, 13},
     ^
In file included from init.c:12:0:
/usr/share/R/include/R_ext/Rdynload.h:55:31: note: ‘types’ declared here
     R_NativePrimitiveArgType *types;
                               ^~~~~
init.c:19:5: warning: missing initializer for field ‘types’ of ‘R_CMethodDef {aka const struct <anonymous>}’ [-Wmissing-field-initializers]
     {NULL, NULL, 0}
     ^
In file included from init.c:12:0:
/usr/share/R/include/R_ext/Rdynload.h:55:31: note: ‘types’ declared here
     R_NativePrimitiveArgType *types;
                               ^~~~~

You can see what it's complaining about here https://cran.r-project.org/doc/manuals/R-exts.html#Registering-native-routines (see their myC_t bit). It's probably not dangerous, but it's also easy enough to fix. Just change your CEntries line to this:

static const R_CMethodDef CEntries[] = {
    {"C_polygauss", (DL_FUNC) &C_polygauss, 13, NULL},
    {NULL, NULL, 0, NULL}
};

It's probably not dangerous though, so feel free to close the issue if you prefer.

[bastistician]

Thanks for testing! I will add the types declaration.

I had based my init file on

tools::package_native_routine_registration_skeleton(".", character_only = FALSE)

which simply omits the types argument (as do most base R packages).

Searching for R_NativePrimitiveArgType on GitHub I did find some R packages which use proper code, for example, cluster, potts, cheddar, earth. polyCub will be among these soon.