From: Kirill A. Korinsky <kirill@korins.ky>
Subject: Re: devel/libggml: getexecpath
To: Thomas Frohwein <tfrohwein@fastmail.com>
Cc: ports@openbsd.org
Date: Fri, 18 Sep 2026 22:51:04 +0200

On Fri, 18 Sep 2026 22:32:18 +0200,
Thomas Frohwein <tfrohwein@fastmail.com> wrote:
> 
> Kirill, ports,
> 
> While searching for where getexecpath can/should be used, I found this
> here in libggml. This diff should replicate what is done on other
> platforms by their idiosyncratic methods (_NSGetExecutablePath,
> procfs). It builds, but I don't really know how to use this library.
> Could maybe use a test run.
>

OK kirill@

Also, please backport it to upstream

> 
> Index: Makefile
> ===================================================================
> RCS file: /cvs/ports/devel/libggml/Makefile,v
> diff -u -p -r1.27 Makefile
> --- Makefile	15 Sep 2026 19:31:59 -0000	1.27
> +++ Makefile	18 Sep 2026 20:21:58 -0000
> @@ -4,6 +4,7 @@ GH_ACCOUNT=		ggml-org
>  GH_PROJECT=		ggml
>  GH_TAGNAME =		v0.24.0
>  PKGNAME=		lib${DISTNAME}
> +REVISION =		0
>  
>  SHARED_LIBS +=		ggml 5.1
>  SHARED_LIBS +=		ggml-base 5.1
> Index: patches/patch-src_ggml-backend-reg_cpp
> ===================================================================
> RCS file: /cvs/ports/devel/libggml/patches/patch-src_ggml-backend-reg_cpp,v
> diff -u -p -r1.8 patch-src_ggml-backend-reg_cpp
> --- patches/patch-src_ggml-backend-reg_cpp	4 Sep 2026 22:27:19 -0000	1.8
> +++ patches/patch-src_ggml-backend-reg_cpp	18 Sep 2026 20:21:58 -0000
> @@ -1,13 +1,23 @@
> +getexecpath
> +
>  Index: src/ggml-backend-reg.cpp
>  --- src/ggml-backend-reg.cpp.orig
>  +++ src/ggml-backend-reg.cpp
> -@@ -489,7 +489,9 @@ static ggml_backend_reg_t ggml_backend_load_best(const
> -         search_paths.push_back(fs::u8path(GGML_BACKEND_DIR));
> +@@ -456,6 +456,17 @@ static fs::path get_executable_path() {
> +         base_path = base_path.substr(0, last_slash);
> +     }
> +     return base_path + L"\\";
> ++#elif defined(__OpenBSD__)
> ++    std::vector<char> path(PATH_MAX);
> ++    if (getexecpath(path.data(), path.size()) != 0)
> ++	    return {};
> ++    std::string base_path(path.data(), path.size());
> ++    // remove executable name
> ++    auto last_slash = base_path.find_last_of('/');
> ++    if (last_slash != std::string::npos) {
> ++        base_path = base_path.substr(0, last_slash);
> ++    }
> ++    return base_path + "/";
> + #else
> +     return {};
>   #endif
> -         // default search paths: executable directory, current directory
> -+#ifndef __OpenBSD__
> -         search_paths.push_back(get_executable_path());
> -+#endif
> -         std::error_code cwd_ec;
> -         const fs::path cwd = fs::current_path(cwd_ec);
> -         if (cwd_ec) {

-- 
wbr, Kirill