From 7470f92a67375d00e53b3785a88fa7b26ad6f1da Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Krause?= <joerg.krause@embedded.rocks>
Date: Fri, 17 May 2019 13:13:35 +0200
Subject: [PATCH] fix taglib-config file for cross compiling (#906)
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The current taglib-config program does not work for cross-compiling as it only
returns the paths to the host, which breaks building programs which uses
`taglib-config` to link against taglib.

Fix this by passing sysroot to the `prefix` and `exec_prefix` fields.

Backported from: 7470f92a67375d00e53b3785a88fa7b26ad6f1da

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
---
 CMakeLists.txt      |  2 +-
 taglib-config.cmake | 10 +++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2de06324..1a0302c4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -105,7 +105,7 @@ math(EXPR TAGLIB_SOVERSION_PATCH "${TAGLIB_SOVERSION_REVISION}")
 include(ConfigureChecks.cmake)
 
 if(NOT WIN32)
-  configure_file("${CMAKE_CURRENT_SOURCE_DIR}/taglib-config.cmake" "${CMAKE_CURRENT_BINARY_DIR}/taglib-config")
+  configure_file("${CMAKE_CURRENT_SOURCE_DIR}/taglib-config.cmake" "${CMAKE_CURRENT_BINARY_DIR}/taglib-config" @ONLY)
   install(PROGRAMS "${CMAKE_CURRENT_BINARY_DIR}/taglib-config" DESTINATION "${BIN_INSTALL_DIR}")
 endif()
 
diff --git a/taglib-config.cmake b/taglib-config.cmake
index 2bc2811a..96ef6883 100644
--- a/taglib-config.cmake
+++ b/taglib-config.cmake
@@ -14,10 +14,10 @@ EOH
 	exit 1;
 }
 
-prefix=${CMAKE_INSTALL_PREFIX}
-exec_prefix=${CMAKE_INSTALL_PREFIX}
-libdir=${LIB_INSTALL_DIR}
-includedir=${INCLUDE_INSTALL_DIR}
+prefix=@CMAKE_SYSROOT@@CMAKE_INSTALL_PREFIX@
+exec_prefix=@CMAKE_SYSROOT@@CMAKE_INSTALL_PREFIX@
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
 
 flags=""
 
@@ -35,7 +35,7 @@ do
 	  flags="$flags -I$includedir/taglib"
 	  ;;
     --version)
-	  echo ${TAGLIB_LIB_VERSION_STRING}
+	  echo @TAGLIB_LIB_VERSION_STRING@
 	  ;;
     --prefix)
 	  echo $prefix
-- 
2.22.0