On Sunday, 21 February 2016 at 20:50:11 UTC, anonymous wrote:
On Sunday, 21 February 2016 at 20:04:34 UTC, kraxli wrote:
What is going on here and what is the difference between dmd
and rdmd?
dmd compiles the modules that you specify on the command line.
By default, it then links an executable from the generated
object files. The linking can only work when you give dmd all
the code, either in source form or in compiled object form.
When something is missing, you get "undefined reference" errors.
Thanks for coming back on that! The problem is the
consoled-package which has the library:
~/.dub/packages/consoled-1.0.0/libconsoled.a
So I link it (or aim to do it ;-) ) but dmd cannot find it:
$ dmd -I~/.dub/packages/consoled-1.0.0/source
-L-l~/.dub/packages/consoled-1.0.0/libconsoled appX.d
/usr/bin/ld: cannot find
-l~/.dub/packages/consoled-1.0.0/libconsoled
collect2: error: ld returned 1 exit status
--- errorlevel 1
That means, when your program has multiple source files
(including libraries), you must put them all on the dmd command
line. Or you can compile modules individually (without linking,
-c flag), and then put the generated object files on the
command line when linking.
rdmd is a wrapper around dmd (or another, compatible compiler).
It reads the dependency tree of the modules, and runs dmd on
all of the source files at once. That means, you only need to
put the root module on the command line for rdmd. rdmd reads
the imports and generates a full list of source files for dmd.
Moreover, ldc2 has conflicts with modules which is probably
due to installation, linking and scope issues. How can I
shrink the scope for ldc2 such that it only looks at the
"right place" for modules (and where is that?) ?
$ ldc2 -I~/.dub/packages/consoled-1.0.0/source/ appX.d
/usr/local/include/d/std/range.d(287): Error: module std.range
from file /usr/local/include/d/std/range.d conflicts with
package name range
I don't know what's going on there, but there shouldn't be a
std/range.d with recent versions of phobos. It's a package
since 2.067.0. Maybe a leftover from a previous installation?
I just reinstalled it and it seems as it would have installed in
the directory mentioned by ldc2:
-- Installing: /usr/local/include/d/std/range
-- Installing: /usr/local/include/d/std/range/primitives.d
-- Installing: /usr/local/include/d/std/range/package.d
-- Installing: /usr/local/include/d/std/range/interfaces.d
