compiler flag --clib prefixes unnecessary path component to library name

[samdmarshall]

Currently the compiler flag --clib:... prefixes the project src path to the specified C library name.

Example

I have created an example project here: https://github.com/samdmarshall/nim-compiler-clib-bug

The relevant files are the nim.cfg:

--clibdir:"/brew/lib"
--cincludes:"/brew/include"
--clib:"notmuch"

generates the following command:

/brew/bin/ld: cannot find -l/home/demi/Desktop/nim-compiler-clib-bug/src/notmuch
clang-10: error: linker command failed with exit code 1 (use -v to see invocation)
Error: execution of an external program failed: 'clang   -o /home/demi/Desktop/nim-compiler-clib-bug/main  /home/demi/.cache/nim/main_d/stdlib_assertions.nim.c.o /home/demi/.cache/nim/main_d/stdlib_io.nim.c.o /home/demi/.cache/nim/main_d/stdlib_system.nim.c.o /home/demi/.cache/nim/main_d/stdlib_parseutils.nim.c.o /home/demi/.cache/nim/main_d/stdlib_strutils.nim.c.o /home/demi/.cache/nim/main_d/stdlib_times.nim.c.o /home/demi/.cache/nim/main_d/stdlib_os.nim.c.o /home/demi/.cache/nim/main_d/stdlib_strformat.nim.c.o /home/demi/.cache/nim/main_d/@mmain.nim.c.o  -lm -lrt   -l/home/demi/Desktop/nim-compiler-clib-bug/src/notmuch -L/brew/lib -ldl'

Current Output

at the end of this command the flags are ordered as such:

-l/home/demi/Desktop/nim-compiler-clib-bug/src/notmuch
-L/brew/lib

Expected Output

-lnotmuch
-L/brew/lib

Possible Solution

currently, using --passL: "-lnotmuch" flag instead of the preferred --clib:"notmuch" flag allows for the correct flags to be passed to the linker.

Additional Information

Nim Compiler:

Nim Compiler Version 1.4.2 [Linux: amd64]
Compiled at 2020-11-30
Copyright (c) 2006-2020 by Andreas Rumpf

git hash: 3fb5157ab1b666a5a5c34efde0f357a82d433d04
active boot switches: -d:release

[KamijoToma]

I met the same question on my project, and I finally build a modified compiler which seems to be worked properly.

Simply, I changed this line to:
conf.cLinkedLibs.add arg
and it seems to link the library without an extra path.

[demotomohiro]

@KamijoToma

I met the same question on my project, and I finally build a modified compiler which seems to be worked properly.

Simply, I changed this line to: conf.cLinkedLibs.add arg and it seems to link the library without an extra path.

Thank you! That fixes this issue.
I have sent PR #19754 to fix this.