ImportC: C files have no way to set module name

[dlangBugzillaToGithub]

dave287091 reported this on 2024-07-20T22:47:18Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=24668

Description

Consider the following source code layout:

main.d
a/
   foo.c

with files

main.d:

import a.foo;

void main(){
    a.foo.foo();
}

a/foo.c:

extern int puts(const char*);
void foo(void){ puts(“foo”); }

dmd main.d fails due to undefined reference to foo (as a/foo.c is not compiled to object code). However, dmd main.d a/foo.c also fails with the error “module foo from file a/foo.c must be imported with ‘import foo;’”. In a D file you would declare “module a.foo;”, but there is no way to do that with ImportC.

[dlangBugzillaToGithub]

dave287091 commented on 2024-07-20T23:11:40Z

I think the fix is to just set the module name to the import path. In other words a/foo.c implies a module a.foo; declaration.