[Issue 24669] New: ImportC: C files are not compiled with '-i' flag

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24669

          Issue ID: 24669
           Summary: ImportC: C files are not compiled with '-i' flag
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: ImportC, link-failure
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: dave287091 at gmail.com

Consider the following source code layout:

```
main.d
foo.c
```

with files

main.d:

```
import foo;

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

foo.c:
```
extern int puts(const char*);
void foo(void){ puts(“foo"); }
```

`dmd -i main.d` fails with undefined reference to `foo`, indicating that foo.c
is not being compiled.

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