File 0001-Revert-Explicitly-use-Boost-s-cmake-config-file.patch of Package libkleo

From 76cb936a1d1216aa4011ab73ac8d8957e9455068 Mon Sep 17 00:00:00 2001
From: Christophe Marin <christophe@krop.fr>
Date: Wed, 30 Jul 2025 16:59:42 +0200
Subject: [PATCH] Revert "Explicitly use Boost's cmake config file for finding
 it"

Leap 15.6 doesn't have boost >= 1.70

This reverts commit 27f8413d7414bab184999bab9083aa1926c013e9.
---
 CMakeLists.txt     | 8 ++------
 src/CMakeLists.txt | 6 +++++-
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a3fa95e0..c884e738 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -73,12 +73,8 @@ set_package_properties(LibGpgError PROPERTIES
   TYPE REQUIRED
 )
 
-find_package(Boost 1.70.0 CONFIG)
-set_package_properties(Boost PROPERTIES
-    TYPE REQUIRED
-    DESCRIPTION "Boost C++ Libraries"
-    URL "https://www.boost.org")
-
+find_package(Boost 1.34.0)
+set_package_properties(Boost PROPERTIES DESCRIPTION "Boost C++ Libraries" URL "https://www.boost.org" TYPE REQUIRED PURPOSE "Boost is required for building most KDEPIM applications")
 ecm_setup_version(PROJECT VARIABLE_PREFIX LIBKLEO
                         VERSION_HEADER "${CMAKE_CURRENT_BINARY_DIR}/libkleo_version.h"
                         PACKAGE_VERSION_FILE "${CMAKE_CURRENT_BINARY_DIR}/KPim6LibkleoConfigVersion.cmake"
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index c4c471b5..72ab4411 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -2,6 +2,7 @@
 # SPDX-FileCopyrightText: none
 # target_include_directories does not handle empty include paths
 include_directories(
+    ${Boost_INCLUDE_DIRS}
     ${GPGME_INCLUDES}
 )
 add_definitions(-DTRANSLATION_DOMAIN=\"libkleopatra6\")
@@ -222,7 +223,10 @@ target_link_libraries(KPim6Libkleo PUBLIC Gpgmepp PRIVATE Qt::Widgets
                                                 LibGpgError::LibGpgError)
 
 target_link_libraries(KPim6Libkleo PUBLIC QGpgmeQt6)
-target_link_libraries(KPim6Libkleo PRIVATE Boost::headers)
+# Boost::headers may not be available for old versions of Boost
+if(TARGET Boost::headers)
+  target_link_libraries(KPim6Libkleo PRIVATE Boost::headers)
+endif()
 
 if(COMPILE_WITH_UNITY_CMAKE_SUPPORT)
     set_target_properties(KPim6Libkleo PROPERTIES UNITY_BUILD ON)
-- 
2.50.1