From ab2267f9aae8643a6ff1a8809dc745cd97d2cb48 Mon Sep 17 00:00:00 2001
From: Tsuda Kageyu <tsuda.kageyu@gmail.com>
Date: Sat, 13 Feb 2016 15:38:35 +0900
Subject: [PATCH] Find Boost properly.

check_cxx_source_compiles() depends on the Visual Studio settings.
---
 ConfigureChecks.cmake | 32 ++++++++++++++------------------
 taglib/CMakeLists.txt |  8 ++++++++
 2 files changed, 22 insertions(+), 18 deletions(-)

diff --git a/ConfigureChecks.cmake b/ConfigureChecks.cmake
index a9f9f17a..0e6eb628 100644
--- a/ConfigureChecks.cmake
+++ b/ConfigureChecks.cmake
@@ -34,6 +34,13 @@ if(NOT ${SIZEOF_DOUBLE} EQUAL 8)
   message(FATAL_ERROR "TagLib requires that double is 64-bit wide.")
 endif()
 
+# Determine whether Boost "header-only" libraries are installed.
+
+find_package(Boost)
+if(Boost_FOUND)
+  set(Boost_VERSION "${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION}.${Boost_SUBMINOR_VERSION}")
+endif()
+
 # Determine which kind of atomic operations your compiler supports.
 
 check_cxx_source_compiles("
@@ -47,15 +54,10 @@ check_cxx_source_compiles("
 " HAVE_STD_ATOMIC)
 
 if(NOT HAVE_STD_ATOMIC)
-  check_cxx_source_compiles("
-    #include <boost/atomic.hpp>
-    int main() {
-      boost::atomic<unsigned int> x(1);
-      x.fetch_add(1);
-      x.fetch_sub(1);
-      return 0;
-    }
-  " HAVE_BOOST_ATOMIC)
+  find_package(Boost COMPONENTS atomic)
+  if(Boost_ATOMIC_FOUND)
+    set(HAVE_BOOST_ATOMIC 1)
+  endif()
 
   if(NOT HAVE_BOOST_ATOMIC)
     check_cxx_source_compiles("
@@ -107,15 +109,9 @@ endif()
 
 # Determine which kind of byte swap functions your compiler supports.
 
-check_cxx_source_compiles("
-  #include <boost/endian/conversion.hpp>
-  int main() {
-    boost::endian::endian_reverse(static_cast<uint16_t>(1));
-    boost::endian::endian_reverse(static_cast<uint32_t>(1));
-    boost::endian::endian_reverse(static_cast<uint64_t>(1));
-    return 0;
-  }
-" HAVE_BOOST_BYTESWAP)
+if(Boost_FOUND AND NOT (Boost_VERSION VERSION_LESS "1.58.0"))
+  set(HAVE_BOOST_BYTESWAP 1)
+endif()
 
 if(NOT HAVE_BOOST_BYTESWAP)
   check_cxx_source_compiles("
diff --git a/taglib/CMakeLists.txt b/taglib/CMakeLists.txt
index 5a047bf1..8e67d709 100644
--- a/taglib/CMakeLists.txt
+++ b/taglib/CMakeLists.txt
@@ -32,6 +32,10 @@ elseif(HAVE_ZLIB_SOURCE)
   include_directories(${ZLIB_SOURCE})
 endif()
 
+if(HAVE_BOOST_ATOMIC OR HAVE_BOOST_BYTESWAP)
+  include_directories(${Boost_INCLUDE_DIR})
+endif()
+
 set(tag_HDRS
   tag.h
   fileref.h
@@ -343,6 +347,10 @@ if(ZLIB_FOUND)
   target_link_libraries(tag ${ZLIB_LIBRARIES})
 endif()
 
+if(HAVE_BOOST_ATOMIC)
+  target_link_libraries(tag ${Boost_ATOMIC_LIBRARY})
+endif()
+
 set_target_properties(tag PROPERTIES
   VERSION ${TAGLIB_SOVERSION_MAJOR}.${TAGLIB_SOVERSION_MINOR}.${TAGLIB_SOVERSION_PATCH}
   SOVERSION ${TAGLIB_SOVERSION_MAJOR}