From 838c1fde159893b8fd59fac25318c3982831d739 Mon Sep 17 00:00:00 2001
From: Rafael Ieda <git@ieda.me>
Date: Fri, 24 Oct 2025 23:24:33 -0300
Subject: [PATCH] t4kcommon: fix build with cmake4

Co-authored-by: Michael Daniels <mdaniels5757@gmail.com>
---
 pkgs/by-name/t4/t4kcommon/linebreak-fix.patch | 17 +++++++++++++++++
 pkgs/by-name/t4/t4kcommon/package.nix         |  7 +++++++
 2 files changed, 24 insertions(+)
 create mode 100644 pkgs/by-name/t4/t4kcommon/linebreak-fix.patch

diff --git a/pkgs/by-name/t4/t4kcommon/linebreak-fix.patch b/pkgs/by-name/t4/t4kcommon/linebreak-fix.patch
new file mode 100644
index 000000000000..a13cdd4a917e
--- /dev/null
+++ b/pkgs/by-name/t4/t4kcommon/linebreak-fix.patch
@@ -0,0 +1,17 @@
+--- a/src/linebreak/CMakeLists.txt
++++ b/src/linebreak/CMakeLists.txt
+@@ -72,12 +72,12 @@
+   ${LINEBREAK_BINARY_DIR} 
+   ${LINEBREAK_SOURCE_DIR} 
+   ${CMAKE_CURRENT_BINARY_DIR})
+-  
++add_library(linebreak STATIC ${LINEBREAK_SOURCES} ${LINEBREAK_HEADERS})
+ if (ICONV_FOUND)
+   include_directories(${ICONV_INCLUDE_DIR})
+   target_link_libraries(linebreak ${ICONV_LIBRARY})
+ endif (ICONV_FOUND)
+-add_library(linebreak STATIC ${LINEBREAK_SOURCES} ${LINEBREAK_HEADERS})
++
+ 
+ #project_source_group("${GROUP_CODE}" LINEBREAK_SOURCES LINEBREAK_HEADERS)
+ 
diff --git a/pkgs/by-name/t4/t4kcommon/package.nix b/pkgs/by-name/t4/t4kcommon/package.nix
index 956002f5a0e7..f59e0309260d 100644
--- a/pkgs/by-name/t4/t4kcommon/package.nix
+++ b/pkgs/by-name/t4/t4kcommon/package.nix
@@ -32,6 +32,8 @@ stdenv.mkDerivation rec {
       url = "https://salsa.debian.org/tux4kids-pkg-team/t4kcommon/raw/f7073fa384f5a725139f54844e59b57338b69dc7/debian/patches/libpng16.patch";
       hash = "sha256-auQ8VvOyvLE1PD2dfeHZJV+MzIt1OtUa7OcOqsXTAYI=";
     })
+    # Fix "Cannot specify link libraries for target "linebreak" which is not built by this project."
+    ./linebreak-fix.patch
   ];
 
   # Workaround build failure on -fno-common toolchains like upstream
@@ -55,6 +57,11 @@ stdenv.mkDerivation rec {
     libxml2
   ];
 
+  postPatch = ''
+    substituteInPlace {src/,./}CMakeLists.txt \
+      --replace-fail "cmake_minimum_required(VERSION 2.6)" "cmake_minimum_required(VERSION 3.10)"
+  '';
+
   meta = with lib; {
     description = "Library of code shared between tuxmath and tuxtype";
     homepage = "https://github.com/tux4kids/t4kcommon";