From 92cc6d79aaaa676f7fce7b250fa9e09e10b91b9c Mon Sep 17 00:00:00 2001
From: Xiangyan Sun <wishstudio@gmail.com>
Date: Sun, 3 May 2026 18:14:58 -0700
Subject: [PATCH] scsh: fix build with gcc15

---
 pkgs/by-name/sc/scsh/gcc-15.patch | 13 +++++++++++++
 pkgs/by-name/sc/scsh/package.nix  |  3 +++
 2 files changed, 16 insertions(+)
 create mode 100644 pkgs/by-name/sc/scsh/gcc-15.patch

diff --git a/pkgs/by-name/sc/scsh/gcc-15.patch b/pkgs/by-name/sc/scsh/gcc-15.patch
new file mode 100644
index 000000000000..c8adf56c2978
--- /dev/null
+++ b/pkgs/by-name/sc/scsh/gcc-15.patch
@@ -0,0 +1,13 @@
+diff --git a/c/syscalls.c b/c/syscalls.c
+index 2be25a8..311f02b 100644
+--- a/c/syscalls.c
++++ b/c/syscalls.c
+@@ -670,7 +670,7 @@ s48_ref_t scm_gethostname(s48_call_t call)
+ {
+    char hostname[MAXHOSTNAMELEN+1];
+     /* different OS's declare differently, so punt the prototype. */
+-    int gethostname();
++    int gethostname(char *name, size_t size);
+     int retval = gethostname(hostname, MAXHOSTNAMELEN);
+     if (retval == -1) s48_os_error_2(call, "scm_gethostname", errno, 0);
+     return s48_enter_byte_string_2(call, hostname);
diff --git a/pkgs/by-name/sc/scsh/package.nix b/pkgs/by-name/sc/scsh/package.nix
index a4a09fb5c020..8c563b51b754 100644
--- a/pkgs/by-name/sc/scsh/package.nix
+++ b/pkgs/by-name/sc/scsh/package.nix
@@ -26,6 +26,9 @@ stdenv.mkDerivation {
     # Fix the build against gcc-14:
     # https://github.com/scheme/scsh/pull/51
     ./gcc-14-p2.patch
+    # Fix the build against gcc-15:
+    # https://github.com/scheme/scsh/pull/52
+    ./gcc-15.patch
   ];
 
   nativeBuildInputs = [ autoreconfHook ];