From df2326d689aade5dbda07b87528fe42d1a7fe1cc Mon Sep 17 00:00:00 2001
From: Sizhe Zhao <prc.zhao@outlook.com>
Date: Fri, 27 Feb 2026 20:24:32 +0800
Subject: [PATCH] minimal-bootstrap.mes: vendor ldexpl.c

---
 .../linux/minimal-bootstrap/mes/ldexpl.c      | 35 +++++++++++++++++++
 .../linux/minimal-bootstrap/mes/libc.nix      |  7 +---
 2 files changed, 36 insertions(+), 6 deletions(-)
 create mode 100644 pkgs/os-specific/linux/minimal-bootstrap/mes/ldexpl.c

diff --git a/pkgs/os-specific/linux/minimal-bootstrap/mes/ldexpl.c b/pkgs/os-specific/linux/minimal-bootstrap/mes/ldexpl.c
new file mode 100644
index 000000000000..8cd5593603b1
--- /dev/null
+++ b/pkgs/os-specific/linux/minimal-bootstrap/mes/ldexpl.c
@@ -0,0 +1,35 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2025 Stefan <stefan-guix@vodafonemail.de>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <math.h>
+
+long double
+ldexpl (long double arg, int exp)
+{
+  if (exp > 0)
+    do
+      arg *= 2;
+    while (--exp);
+  else if (exp < 0)
+    do
+      arg /= 2;
+    while (++exp);
+  return arg;
+}
diff --git a/pkgs/os-specific/linux/minimal-bootstrap/mes/libc.nix b/pkgs/os-specific/linux/minimal-bootstrap/mes/libc.nix
index 0f9ca28912d1..9fe150ea7018 100644
--- a/pkgs/os-specific/linux/minimal-bootstrap/mes/libc.nix
+++ b/pkgs/os-specific/linux/minimal-bootstrap/mes/libc.nix
@@ -21,18 +21,13 @@ let
   sources = (import ./sources.nix).${arch}.linux.gcc;
   inherit (sources) libtcc1_SOURCES libc_gnu_SOURCES;
 
-  ldexpl = fetchurl {
-    url = "https://gitlab.com/janneke/mes/-/raw/c837abed8edb341d4e56913729fbe9803b4de47c/lib/math/ldexpl.c";
-    hash = "sha256-3QoFZZIqVmlMUosEqOdYIMEHzYgQ7GJ7Hz0Bf/1iIig=";
-  };
-
   # Concatenate all source files into a convenient bundle
   # "gcc" variants of source files (eg. "lib/linux/x86-mes-gcc") can also be
   # compiled by tinycc
   #
   # Passing this many arguments is too much for kaem so we need to split
   # the operation in two
-  firstLibc = (lib.take 100 libc_gnu_SOURCES) ++ [ ldexpl ];
+  firstLibc = (lib.take 100 libc_gnu_SOURCES) ++ [ ./ldexpl.c ];
   lastLibc = lib.drop 100 libc_gnu_SOURCES;
 in
 kaem.runCommand "${pname}-${version}"