Upstream-status: https://github.com/dlang/phobos/pull/10980

From e2d65597896089a8bd06992a4b83e3d14176b02c Mon Sep 17 00:00:00 2001
From: Yelninei <yelninei@tutamail.com>
Date: Tue, 24 Mar 2026 19:46:30 +0000
Subject: [PATCH] phobos: Fixes for GNU/Hurd.

---
 Makefile                | 2 +-
 std/datetime/timezone.d | 1 +
 std/math/algebraic.d    | 1 +
 std/process.d           | 2 ++
 4 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 4fa51299e..a9d4789f6 100644
--- a/Makefile
+++ b/Makefile
@@ -305,7 +305,7 @@ else
 endif
 
 # build with shared library support (defaults to true on supported platforms)
-SHARED=$(if $(findstring $(OS),linux freebsd),1,)
+SHARED=$(if $(findstring $(OS),linux freebsd hurd),1,)
 
 TESTS_EXTRACTOR=$(ROOT)/tests_extractor$(DOTEXE)
 PUBLICTESTS_DIR=$(ROOT)/publictests
diff --git a/std/datetime/timezone.d b/std/datetime/timezone.d
index 7461fcaa3..05c2999d3 100644
--- a/std/datetime/timezone.d
+++ b/std/datetime/timezone.d
@@ -338,6 +338,7 @@ public:
             else version (linux)         enum utcZone = "UTC";
             else version (Darwin)        enum utcZone = "UTC";
             else version (Solaris)       enum utcZone = "UTC";
+            else version (Hurd)          enum utcZone = "UTC";
             else static assert(0, "The location of the UTC timezone file on this Posix platform must be set.");
 
             auto tzs = [testTZ("America/Los_Angeles", "PST", "PDT", dur!"hours"(-8), dur!"hours"(1)),
diff --git a/std/math/algebraic.d b/std/math/algebraic.d
index f96f24f15..05bf08b9c 100644
--- a/std/math/algebraic.d
+++ b/std/math/algebraic.d
@@ -631,6 +631,7 @@ else version (FreeBSD)      version = GenericPosixVersion;
 else version (OpenBSD)      version = GenericPosixVersion;
 else version (Solaris)      version = GenericPosixVersion;
 else version (DragonFlyBSD) version = GenericPosixVersion;
+else version (Hurd)         version = GenericPosixVersion;
 
 private real polyImpl(real x, in real[] A) @trusted pure nothrow @nogc
 {
diff --git a/std/process.d b/std/process.d
index d359ca0ba..dc981c5e5 100644
--- a/std/process.d
+++ b/std/process.d
@@ -1031,6 +1031,8 @@ private Pid spawnProcessPosix(scope const(char[])[] args,
                     import core.sys.freebsd.unistd : closefrom;
                 else version (OpenBSD)
                     import core.sys.openbsd.unistd : closefrom;
+                else version (Hurd)
+                    import core.sys.hurd.unistd : closefrom;
 
                 static if (!__traits(compiles, closefrom))
                 {
-- 
2.52.0