From 54b9fe4de9f0aa3af15f52a6f27ffaf758b43769 Mon Sep 17 00:00:00 2001
From: zdenop <zdenop@gmail.com>
Date: Sat, 15 Jul 2023 19:43:50 +0200
Subject: [PATCH] cmake: check_leptonica_tiff_support() works with cmake>=3.25

---
 CMakeLists.txt             |  4 +--
 cmake/CheckFunctions.cmake | 54 ++++++++++++++++++++------------------
 2 files changed, 31 insertions(+), 27 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1eb3c6a5..68da6c53 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -408,10 +408,10 @@ else()
   include_directories(${Leptonica_INCLUDE_DIRS})
 
   check_leptonica_tiff_support()
-  if (NOT LEPT_TIFF_RESULT EQUAL 0)
+  if ((NOT LEPT_TIFF_RESULT EQUAL 0) AND LEPT_TIFF_COMPILE_SUCCESS)
     message(NOTICE "Leptonica was build without TIFF support! Disabling TIFF support...")
     set(DISABLE_TIFF ON)
-  else()
+  elseif(NOT ${CMAKE_VERSION} VERSION_LESS "3.25")
     message(STATUS "Leptonica was build with TIFF support.")
   endif()
 
diff --git a/cmake/CheckFunctions.cmake b/cmake/CheckFunctions.cmake
index c897db48..4618eaeb 100644
--- a/cmake/CheckFunctions.cmake
+++ b/cmake/CheckFunctions.cmake
@@ -18,31 +18,35 @@ 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")
-  set(CMAKE_TRY_COMPILE_CONFIGURATION ${CMAKE_BUILD_TYPE})
-  try_run(
-    LEPT_TIFF_RESULT
-    LEPT_TIFF_COMPILE
-    SOURCE_FROM_CONTENT tiff_test.cpp "${TIFF_TEST}"
-    CMAKE_FLAGS "-DINCLUDE_DIRECTORIES=${Leptonica_INCLUDE_DIRS}"
-    LINK_LIBRARIES ${Leptonica_LIBRARIES}
-    COMPILE_OUTPUT_VARIABLE
-    COMPILE_OUTPUT)
-  if(NOT LEPT_TIFF_COMPILE)
-    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: ${LEPT_TIFF_COMPILE}")
-    message(WARNING "Failed to compile test")
+  "#include \"leptonica/allheaders.h\"\n"
+  "int main() {\n"
+  "  l_uint8 *data = NULL;\n"
+  "  size_t size = 0;\n"
+  "  PIX* pix = pixCreate(3, 3, 4);\n"
+  "  l_int32 ret_val = pixWriteMemTiff(&data, &size, pix, IFF_TIFF_G3);\n"
+  "  pixDestroy(&pix);\n"
+  "  lept_free(data);\n"
+  "  return ret_val;}\n")
+  if(${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)