--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/tesseract/cmake/CheckFunctions.cmake	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,53 @@
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by
+# applicable law or agreed to in writing, software distributed under the License
+# is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the specific language
+# governing permissions and limitations under the License.
+# ##############################################################################
+#
+# macros and functions
+#
+# ##############################################################################
+
+# ##############################################################################
+# FUNCTION check_leptonica_tiff_support
+# ##############################################################################
+function(check_leptonica_tiff_support)
+  # check if leptonica was build with tiff support set result to
+  # LEPT_TIFF_RESULT
+  set(TIFF_TEST
+  "#include \"leptonica/allheaders.h\"\n"
+  "int main() {\n"
+  "  l_uint8 *data = NULL;\n"
+  "  size_t size = 0;\n"
+  "  PIX* pix = pixCreate(3, 3, 4);\n"
+  "  l_int32 ret_val = pixWriteMemTiff(&data, &size, pix, IFF_TIFF_G3);\n"
+  "  pixDestroy(&pix);\n"
+  "  lept_free(data);\n"
+  "  return ret_val;}\n")
+  if(${CMAKE_VERSION} VERSION_LESS "3.25")
+    message(STATUS "Testing TIFF support in Leptonica is available with CMake >= 3.25 (you have ${CMAKE_VERSION}))")
+  else()
+    set(CMAKE_TRY_COMPILE_CONFIGURATION ${CMAKE_BUILD_TYPE})
+    try_run(
+      LEPT_TIFF_RESULT
+      LEPT_TIFF_COMPILE_SUCCESS
+      SOURCE_FROM_CONTENT tiff_test.cpp "${TIFF_TEST}"
+      CMAKE_FLAGS "-DINCLUDE_DIRECTORIES=${Leptonica_INCLUDE_DIRS}"
+      LINK_LIBRARIES ${Leptonica_LIBRARIES}
+      COMPILE_OUTPUT_VARIABLE
+      COMPILE_OUTPUT)
+    if(NOT LEPT_TIFF_COMPILE_SUCCESS)
+      message(STATUS "COMPILE_OUTPUT: ${COMPILE_OUTPUT}")
+      message(STATUS "Leptonica_INCLUDE_DIRS: ${Leptonica_INCLUDE_DIRS}")
+      message(STATUS "Leptonica_LIBRARIES: ${Leptonica_LIBRARIES}")
+      message(STATUS "LEPT_TIFF_RESULT: ${LEPT_TIFF_RESULT}")
+      message(STATUS "LEPT_TIFF_COMPILE: ${LEPT_TIFF_COMPILE}")
+      message(WARNING "Failed to compile test")
+    endif()
+  endif()
+endfunction(check_leptonica_tiff_support)
+
+# ##############################################################################