Detect incompatible libtorrent v2 versions in build systems

Although the detection is working, the error message in autotools is not
perfect, i.e. it would only mention valid range for libtorrent v1 and it
shouldn't be a problem since v2 support isn't fully ready yet.

CMakeLists.txt

@@ -14,7 +14,8 @@ set(CMAKE_FIND_PACKAGE_PREFER_CONFIG ON)
 set(minBoostVersion 1.65)
 set(minQtVersion 5.15.2)
 set(minOpenSSLVersion 1.1.1)
-set(minLibtorrentVersion 1.2.14)
+set(minLibtorrent1Version 1.2.14)
+set(minLibtorrentVersion 2.0.4)
 set(minZlibVersion 1.2.11)
 
 # features (some are platform-specific)

INSTALL

@@ -5,8 +5,8 @@ qBittorrent - A BitTorrent client in C++ / Qt
 
   - Boost >= 1.65
 
-  - libtorrent-rasterbar >= 1.2.14 (by Arvid Norberg)
+  - libtorrent-rasterbar: (>= 1.2.14) || (>= 2.0.4)
-      * https://www.libtorrent.org/
+      * By Arvid Norberg, https://www.libtorrent.org/
       * Be careful: another library (the one used by rTorrent) uses a similar name
 
   - OpenSSL >= 1.1.1
@@ -15,10 +15,12 @@ qBittorrent - A BitTorrent client in C++ / Qt
 
   - zlib >= 1.2.11
 
-  - pkg-config (compile-time only on *nix systems)
+  - pkg-config
+      * Compile-time only on *nix systems
 
-  - Python >= 3.5.0 (optional, runtime only)
+  - Python >= 3.5.0
-      * Required by the internal search engine
+      * Optional, run-time only
+      * Used by the bundled search engine
 
 Dependency version numbers are bumped every once in a while to keep the range of properly tested configurations manageable, even if not strictly required to build.
 You may be able to build with older versions of (some of) the dependencies other than the minimum versions specified in the build scripts, but support for such builds is not provided - you are on your own.

configure

@@ -5522,8 +5522,8 @@ if test "x$enable_gui" = "xyes"
 then :
 
 pkg_failed=no
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for Qt5Svg" >&5
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for Qt5Svg >= 5.15.2" >&5
-printf %s "checking for Qt5Svg... " >&6; }
+printf %s "checking for Qt5Svg >= 5.15.2... " >&6; }
 
 if test -n "$Qt5Svg_CFLAGS"; then
     pkg_cv_Qt5Svg_CFLAGS="$Qt5Svg_CFLAGS"
@@ -5563,7 +5563,7 @@ fi
 
 
 if test $pkg_failed = yes; then
-   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
@@ -5590,7 +5590,7 @@ Alternatively, you may set the environment variables Qt5Svg_CFLAGS
 and Qt5Svg_LIBS to avoid the need to call pkg-config.
 See the pkg-config man page for more details." "$LINENO" 5
 elif test $pkg_failed = untried; then
-     	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
@@ -6032,19 +6032,19 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 
 pkg_failed=no
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libtorrent" >&5
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libtorrent-rasterbar >= 2.0.4" >&5
-printf %s "checking for libtorrent... " >&6; }
+printf %s "checking for libtorrent-rasterbar >= 2.0.4... " >&6; }
 
 if test -n "$libtorrent_CFLAGS"; then
     pkg_cv_libtorrent_CFLAGS="$libtorrent_CFLAGS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libtorrent-rasterbar >= 1.2.14\""; } >&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libtorrent-rasterbar >= 2.0.4\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "libtorrent-rasterbar >= 1.2.14") 2>&5
+  ($PKG_CONFIG --exists --print-errors "libtorrent-rasterbar >= 2.0.4") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
-  pkg_cv_libtorrent_CFLAGS=`$PKG_CONFIG --cflags "libtorrent-rasterbar >= 1.2.14" 2>/dev/null`
+  pkg_cv_libtorrent_CFLAGS=`$PKG_CONFIG --cflags "libtorrent-rasterbar >= 2.0.4" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
 else
   pkg_failed=yes
@@ -6056,12 +6056,12 @@ if test -n "$libtorrent_LIBS"; then
     pkg_cv_libtorrent_LIBS="$libtorrent_LIBS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libtorrent-rasterbar >= 1.2.14\""; } >&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libtorrent-rasterbar >= 2.0.4\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "libtorrent-rasterbar >= 1.2.14") 2>&5
+  ($PKG_CONFIG --exists --print-errors "libtorrent-rasterbar >= 2.0.4") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
-  pkg_cv_libtorrent_LIBS=`$PKG_CONFIG --libs "libtorrent-rasterbar >= 1.2.14" 2>/dev/null`
+  pkg_cv_libtorrent_LIBS=`$PKG_CONFIG --libs "libtorrent-rasterbar >= 2.0.4" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
 else
   pkg_failed=yes
@@ -6073,7 +6073,7 @@ fi
 
 
 if test $pkg_failed = yes; then
-   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
@@ -6082,14 +6082,73 @@ else
         _pkg_short_errors_supported=no
 fi
         if test $_pkg_short_errors_supported = yes; then
-	        libtorrent_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libtorrent-rasterbar >= 1.2.14" 2>&1`
+	        libtorrent_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libtorrent-rasterbar >= 2.0.4" 2>&1`
         else
-	        libtorrent_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libtorrent-rasterbar >= 1.2.14" 2>&1`
+	        libtorrent_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libtorrent-rasterbar >= 2.0.4" 2>&1`
         fi
 	# Put the nasty error message in config.log where it belongs
 	echo "$libtorrent_PKG_ERRORS" >&5
 
-	as_fn_error $? "Package requirements (libtorrent-rasterbar >= 1.2.14) were not met:
+
+pkg_failed=no
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2" >&5
+printf %s "checking for libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2... " >&6; }
+
+if test -n "$libtorrent_CFLAGS"; then
+    pkg_cv_libtorrent_CFLAGS="$libtorrent_CFLAGS"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv_libtorrent_CFLAGS=`$PKG_CONFIG --cflags "libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+if test -n "$libtorrent_LIBS"; then
+    pkg_cv_libtorrent_LIBS="$libtorrent_LIBS"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv_libtorrent_LIBS=`$PKG_CONFIG --libs "libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+
+
+
+if test $pkg_failed = yes; then
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+
+if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
+        _pkg_short_errors_supported=yes
+else
+        _pkg_short_errors_supported=no
+fi
+        if test $_pkg_short_errors_supported = yes; then
+	        libtorrent_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2" 2>&1`
+        else
+	        libtorrent_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2" 2>&1`
+        fi
+	# Put the nasty error message in config.log where it belongs
+	echo "$libtorrent_PKG_ERRORS" >&5
+
+	as_fn_error $? "Package requirements (libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2) were not met:
 
 $libtorrent_PKG_ERRORS
 
@@ -6100,7 +6159,7 @@ Alternatively, you may set the environment variables libtorrent_CFLAGS
 and libtorrent_LIBS to avoid the need to call pkg-config.
 See the pkg-config man page for more details." "$LINENO" 5
 elif test $pkg_failed = untried; then
-     	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
@@ -6119,14 +6178,114 @@ else
 	libtorrent_LIBS=$pkg_cv_libtorrent_LIBS
         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
-	CXXFLAGS="$libtorrent_CFLAGS $CXXFLAGS"
+	CXXFLAGS="$libtorrent_CFLAGS $CXXFLAGS" LIBS="$libtorrent_LIBS $LIBS"
-                  LIBS="$libtorrent_LIBS $LIBS"
+fi
+elif test $pkg_failed = untried; then
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+
+pkg_failed=no
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2" >&5
+printf %s "checking for libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2... " >&6; }
+
+if test -n "$libtorrent_CFLAGS"; then
+    pkg_cv_libtorrent_CFLAGS="$libtorrent_CFLAGS"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv_libtorrent_CFLAGS=`$PKG_CONFIG --cflags "libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+if test -n "$libtorrent_LIBS"; then
+    pkg_cv_libtorrent_LIBS="$libtorrent_LIBS"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv_libtorrent_LIBS=`$PKG_CONFIG --libs "libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+
+
+
+if test $pkg_failed = yes; then
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+
+if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
+        _pkg_short_errors_supported=yes
+else
+        _pkg_short_errors_supported=no
+fi
+        if test $_pkg_short_errors_supported = yes; then
+	        libtorrent_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2" 2>&1`
+        else
+	        libtorrent_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2" 2>&1`
+        fi
+	# Put the nasty error message in config.log where it belongs
+	echo "$libtorrent_PKG_ERRORS" >&5
+
+	as_fn_error $? "Package requirements (libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2) were not met:
+
+$libtorrent_PKG_ERRORS
+
+Consider adjusting the PKG_CONFIG_PATH environment variable if you
+installed software in a non-standard prefix.
+
+Alternatively, you may set the environment variables libtorrent_CFLAGS
+and libtorrent_LIBS to avoid the need to call pkg-config.
+See the pkg-config man page for more details." "$LINENO" 5
+elif test $pkg_failed = untried; then
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "The pkg-config script could not be found or is too old.  Make sure it
+is in your PATH or set the PKG_CONFIG environment variable to the full
+path to pkg-config.
+
+Alternatively, you may set the environment variables libtorrent_CFLAGS
+and libtorrent_LIBS to avoid the need to call pkg-config.
+See the pkg-config man page for more details.
+
+To get pkg-config, see <http://pkg-config.freedesktop.org/>.
+See \`config.log' for more details" "$LINENO" 5; }
+else
+	libtorrent_CFLAGS=$pkg_cv_libtorrent_CFLAGS
+	libtorrent_LIBS=$pkg_cv_libtorrent_LIBS
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+	CXXFLAGS="$libtorrent_CFLAGS $CXXFLAGS" LIBS="$libtorrent_LIBS $LIBS"
+fi
+else
+	libtorrent_CFLAGS=$pkg_cv_libtorrent_CFLAGS
+	libtorrent_LIBS=$pkg_cv_libtorrent_LIBS
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+	CXXFLAGS="$libtorrent_CFLAGS $CXXFLAGS" LIBS="$libtorrent_LIBS $LIBS"
 fi
 
 
 pkg_failed=no
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for openssl" >&5
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for openssl >= 1.1.1" >&5
-printf %s "checking for openssl... " >&6; }
+printf %s "checking for openssl >= 1.1.1... " >&6; }
 
 if test -n "$openssl_CFLAGS"; then
     pkg_cv_openssl_CFLAGS="$openssl_CFLAGS"
@@ -6166,7 +6325,7 @@ fi
 
 
 if test $pkg_failed = yes; then
-   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
@@ -6193,7 +6352,7 @@ Alternatively, you may set the environment variables openssl_CFLAGS
 and openssl_LIBS to avoid the need to call pkg-config.
 See the pkg-config man page for more details." "$LINENO" 5
 elif test $pkg_failed = untried; then
-     	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
@@ -6218,8 +6377,8 @@ fi
 
 
 pkg_failed=no
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for zlib" >&5
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for zlib >= 1.2.11" >&5
-printf %s "checking for zlib... " >&6; }
+printf %s "checking for zlib >= 1.2.11... " >&6; }
 
 if test -n "$zlib_CFLAGS"; then
     pkg_cv_zlib_CFLAGS="$zlib_CFLAGS"
@@ -6259,7 +6418,7 @@ fi
 
 
 if test $pkg_failed = yes; then
-   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
@@ -6286,7 +6445,7 @@ Alternatively, you may set the environment variables zlib_CFLAGS
 and zlib_LIBS to avoid the need to call pkg-config.
 See the pkg-config man page for more details." "$LINENO" 5
 elif test $pkg_failed = untried; then
-     	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
@@ -7845,3 +8004,4 @@ fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: Good, the configure finished." >&5
 printf "%s\n" "$as_me: Good, the configure finished." >&6;}
 printf "%s\n"
+

configure.ac

@@ -177,9 +177,11 @@ AC_COMPILE_IFELSE([DETECT_BOOST_VERSION_PROGRAM(106000)], [],
     [QBT_ADD_DEFINES="$QBT_ADD_DEFINES BOOST_NO_CXX11_RVALUE_REFERENCES"])
 
 PKG_CHECK_MODULES(libtorrent,
-                  [libtorrent-rasterbar >= 1.2.14],
+                  [libtorrent-rasterbar >= 2.0.4],
-                  [CXXFLAGS="$libtorrent_CFLAGS $CXXFLAGS"
+                  [CXXFLAGS="$libtorrent_CFLAGS $CXXFLAGS" LIBS="$libtorrent_LIBS $LIBS"],
-                  LIBS="$libtorrent_LIBS $LIBS"])
+                  [PKG_CHECK_MODULES(libtorrent,
+                                     [libtorrent-rasterbar >= 1.2.14 libtorrent-rasterbar < 2],
+                                     [CXXFLAGS="$libtorrent_CFLAGS $CXXFLAGS" LIBS="$libtorrent_LIBS $LIBS"])])
 
 PKG_CHECK_MODULES(openssl,
                   [openssl >= 1.1.1],

src/CMakeLists.txt

@@ -1,35 +1,43 @@
-if (UNIX AND (NOT APPLE) AND (NOT CYGWIN))
+macro(find_libtorrent version)
-    find_package(LibtorrentRasterbar QUIET ${minLibtorrentVersion} COMPONENTS torrent-rasterbar)
+    if (UNIX AND (NOT APPLE) AND (NOT CYGWIN))
-    if (NOT LibtorrentRasterbar_FOUND)
+        find_package(LibtorrentRasterbar QUIET ${version} COMPONENTS torrent-rasterbar)
-        include(FindPkgConfig)
+        if (NOT LibtorrentRasterbar_FOUND)
-        pkg_check_modules(LIBTORRENT_RASTERBAR IMPORTED_TARGET GLOBAL "libtorrent-rasterbar>=${minLibtorrentVersion}")
+            include(FindPkgConfig)
-        if (NOT LIBTORRENT_RASTERBAR_FOUND)
+            pkg_check_modules(LibtorrentRasterbar IMPORTED_TARGET GLOBAL "libtorrent-rasterbar>=${version}")
-            message(
+            if (NOT LibtorrentRasterbar_FOUND)
-                FATAL_ERROR
+                message(
-                "Package LibtorrentRasterbar >= ${minLibtorrentVersion} not found"
+                    FATAL_ERROR
-                " with CMake or pkg-config.\n- Set LibtorrentRasterbar_DIR to a directory containing"
+                    "Package LibtorrentRasterbar >= ${version} not found"
-                " a LibtorrentRasterbarConfig.cmake file or add the installation prefix of LibtorrentRasterbar"
+                    " with CMake or pkg-config.\n- Set LibtorrentRasterbar_DIR to a directory containing"
-                " to CMAKE_PREFIX_PATH.\n- Alternatively, make sure there is a valid libtorrent-rasterbar.pc"
+                    " a LibtorrentRasterbarConfig.cmake file or add the installation prefix of LibtorrentRasterbar"
-                " file in your system's pkg-config search paths (use the system environment variable PKG_CONFIG_PATH"
+                    " to CMAKE_PREFIX_PATH.\n- Alternatively, make sure there is a valid libtorrent-rasterbar.pc"
-                " to specify additional search paths if needed)."
+                    " file in your system's pkg-config search paths (use the system environment variable PKG_CONFIG_PATH"
+                    " to specify additional search paths if needed)."
+                )
+            endif()
+            add_library(LibtorrentRasterbar::torrent-rasterbar ALIAS PkgConfig::LibtorrentRasterbar)
+            # force a fake package to show up in the feature summary
+            set_property(GLOBAL APPEND PROPERTY
+                PACKAGES_FOUND
+                "LibtorrentRasterbar via pkg-config (version >= ${version})"
             )
+            set_package_properties("LibtorrentRasterbar via pkg-config (version >= ${version})"
+                PROPERTIES
+                TYPE REQUIRED
+            )
+        else()
+            set_package_properties(LibtorrentRasterbar PROPERTIES TYPE REQUIRED)
         endif()
-        add_library(LibtorrentRasterbar::torrent-rasterbar ALIAS PkgConfig::LIBTORRENT_RASTERBAR)
-        # force a fake package to show up in the feature summary
-        set_property(GLOBAL APPEND PROPERTY
-            PACKAGES_FOUND
-            "LibtorrentRasterbar via pkg-config (version >= ${minLibtorrentVersion})"
-        )
-        set_package_properties("LibtorrentRasterbar via pkg-config (version >= ${minLibtorrentVersion})"
-            PROPERTIES
-            TYPE REQUIRED
-        )
     else()
-        set_package_properties(LibtorrentRasterbar PROPERTIES TYPE REQUIRED)
+        find_package(LibtorrentRasterbar ${version} REQUIRED COMPONENTS torrent-rasterbar)
     endif()
-else()
+endmacro()
-    find_package(LibtorrentRasterbar ${minLibtorrentVersion} REQUIRED COMPONENTS torrent-rasterbar)
+
+find_libtorrent(${minLibtorrent1Version})
+if (LibtorrentRasterbar_FOUND AND (LibtorrentRasterbar_VERSION VERSION_GREATER_EQUAL 2.0))
+    find_libtorrent(${minLibtorrentVersion})
 endif()
+
 # force variable type so that it always shows up in ccmake/cmake-gui frontends
 set_property(CACHE LibtorrentRasterbar_DIR PROPERTY TYPE PATH)
 find_package(Boost ${minBoostVersion} REQUIRED)