From 911e4a892b893df12c028741028826abaffee6f0 Mon Sep 17 00:00:00 2001
From: Eugene Shalygin <eugene.shalygin@gmail.com>
Date: Mon, 15 Oct 2018 23:10:37 +0200
Subject: [PATCH] cmake: remove $<LINK_ONLY:...> expressions from
 INTERFACE_LINK_LIBRARIES

When torrent-rasterbar is built a static library, CMake supplies link
dependencies inside the LINK_ONLY generator expressions. But pkg-config
does not support such operational mode, and thus we can safely replace
those expressions with the library names. Closes #3354.
---
 cmake/Modules/GeneratePkgConfig.cmake | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/cmake/Modules/GeneratePkgConfig.cmake b/cmake/Modules/GeneratePkgConfig.cmake
index e668bc377..2bb76a0ef 100644
--- a/cmake/Modules/GeneratePkgConfig.cmake
+++ b/cmake/Modules/GeneratePkgConfig.cmake
@@ -49,12 +49,15 @@ function(_get_target_property_merging_configs _var_name _target_name _propert_na
 			endif()
 		endforeach()
 	endif()
+	# HACK for static libraries cmake populates link dependencies as $<LINK_ONLY:lib_name>.
+	# pkg-config does not support special handling for static libraries and as such we will remove
+	# that generator expression
+	string(REPLACE "$<LINK_ONLY:" "$<1:" vals "${vals}")
 	# HACK file(GENERATE), which we use for expanding generator expressions, is BUILD_INTERFACE,
-	# but we need INSTALL_INTERFACE here. As such, let us inter-change them.
+	# but we need INSTALL_INTERFACE here.
 	# See https://gitlab.kitware.com/cmake/cmake/issues/17984
-	string(REPLACE "$<BUILD_INTERFACE:" "$<TMP_INTERFACE:" vals "${vals}")
-	string(REPLACE "$<INSTALL_INTERFACE:" "@CMAKE_INSTALL_PREFIX@/$<BUILD_INTERFACE:" vals "${vals}")
-	string(REPLACE "$<TMP_INTERFACE:" "$<INSTALL_INTERFACE:" vals "${vals}")
+	string(REPLACE "$<BUILD_INTERFACE:" "$<0:" vals "${vals}")
+	string(REPLACE "$<INSTALL_INTERFACE:" "@CMAKE_INSTALL_PREFIX@/$<1:" vals "${vals}")
 	set(${_var_name} "${vals}" PARENT_SCOPE)
 endfunction()