Add patch to fix linking fontconfig

recipes/fltk/all/conandata.yml

@@ -15,6 +15,7 @@ sources:
 patches:
   "1.4.0":
     - patch_file: "patches/1.4.0-0001-CMake-Improve-detection-of-the-GLU-library-and-GL-gl.patch"
+    - patch_file: "patches/1.4.0-0002-Use-find_package-for-Fontconfig.patch"
   "1.3.9":
     - patch_file: "patches/1.3.8-0001-remove-fluid.patch"
     - patch_file: "patches/1.3.8-0003-build-static-only-on-static.patch"

recipes/fltk/all/patches/1.4.0-0002-Use-find_package-for-Fontconfig.patch

@@ -0,0 +1,84 @@
+From f9684464d5dc45161b7ee3fee5ce41e3cd506d7b Mon Sep 17 00:00:00 2001
+From: Jordan Williams <[email protected]>
+Date: Thu, 11 Apr 2024 08:06:51 -0500
+Subject: [PATCH] Use find_package for Fontconfig
+
+---
+ CMake/options.cmake   | 2 +-
+ CMake/resources.cmake | 4 ++--
+ CMake/variables.cmake | 6 +++---
+ src/CMakeLists.txt    | 6 +++---
+ 4 files changed, 9 insertions(+), 9 deletions(-)
+
+diff --git a/CMake/options.cmake b/CMake/options.cmake
+index c4ba98914..e7414487f 100644
+--- a/CMake/options.cmake
++++ b/CMake/options.cmake
+@@ -951,7 +951,7 @@ if(FLTK_USE_XFT)
+   list(APPEND FLTK_LDLIBS -lXft)
+   set(FLTK_XFT_FOUND TRUE)
+   if(APPLE AND FLTK_BACKEND_X11)
+-    find_library(LIB_fontconfig fontconfig "/opt/X11/lib")
++    find_package(Fontconfig)
+   endif()
+ else()
+   set(FLTK_XFT_FOUND FALSE)
+diff --git a/CMake/resources.cmake b/CMake/resources.cmake
+index e5d6f8c9f..657514db3 100644
+--- a/CMake/resources.cmake
++++ b/CMake/resources.cmake
+@@ -147,7 +147,7 @@ mark_as_advanced(FREETYPE_PATH)
+ # libraries
+ find_library(LIB_dl dl)
+ if((NOT APPLE) OR FLTK_BACKEND_X11)
+-  find_library(LIB_fontconfig fontconfig)
++  find_package(Fontconfig)
+ endif((NOT APPLE) OR FLTK_BACKEND_X11)
+ find_library(LIB_freetype freetype)
+ find_library(LIB_GL GL)
+@@ -158,7 +158,7 @@ find_library(LIB_png png)
+ find_library(LIB_zlib z)
+ find_library(LIB_m m)
+
+-mark_as_advanced(LIB_dl LIB_fontconfig LIB_freetype)
++mark_as_advanced(LIB_dl LIB_freetype)
+ mark_as_advanced(LIB_GL LIB_MesaGL LIB_GLEW)
+ mark_as_advanced(LIB_jpeg LIB_png LIB_zlib)
+ mark_as_advanced(LIB_m)
+diff --git a/CMake/variables.cmake b/CMake/variables.cmake
+index cbf6ffdf3..dbcb65a45 100644
+--- a/CMake/variables.cmake
++++ b/CMake/variables.cmake
+@@ -53,9 +53,9 @@ else()
+   list(APPEND FLTK_LDLIBS -lm)
+ endif(WIN32)
+
+-if(LIB_fontconfig)
+-  list(APPEND FLTK_LDLIBS -lfontconfig)
+-endif(LIB_fontconfig)
++if(Fontconfig_FOUND)
++  list(APPEND FLTK_LDLIBS Fontconfig::Fontconfig)
++endif()
+
+ # add "-ldl" or whatever is necessary according to CMake (CMAKE_DL_LIBS)
+ if(HAVE_DLSYM)
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index e283f0ce4..facfb9f72 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -685,9 +685,9 @@ endif(USE_PANGO)
+
+ if(USE_XFT)
+   list(APPEND OPTIONAL_LIBS ${X11_Xft_LIB})
+-  if(LIB_fontconfig)
+-    list(APPEND OPTIONAL_LIBS ${LIB_fontconfig})
+-  endif(LIB_fontconfig)
++  if(Fontconfig_FOUND)
++    list(APPEND OPTIONAL_LIBS Fontconfig::Fontconfig)
++  endif()
+ endif(USE_XFT)
+
+ if(UNIX AND FLTK_BACKEND_WAYLAND)
+-- 
+2.44.0
+