From 0a31a14d0939f6cb1f6b92bb73429b9165a1b0bc Mon Sep 17 00:00:00 2001
From: Stefan Reinhold <sre@informatik.uni-kiel.de>
Date: Tue, 17 Jul 2018 11:56:38 +0200
Subject: [PATCH] Fix INSTALL_INTERFACE for exported target

CMake war reporting: 'Target "GSL" INTERFACE_SOURCES property contains
path: "..." which is prefixed in the source directory'.
CMake was confused because the $<BUILD_INTERFACE: ...> had linebreaks
in it.
Putting everything in one line fixed the issue.
---
 CMakeLists.txt | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1693069..f9b0454 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -55,12 +55,8 @@ target_compile_definitions(GSL INTERFACE
 
 # add include folders to the library and targets that consume it
 target_include_directories(GSL INTERFACE
-    $<BUILD_INTERFACE:
-        ${CMAKE_CURRENT_SOURCE_DIR}/include
-    >
-    $<INSTALL_INTERFACE:
-        include
-    >
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:include>
 )
 
 if ((CMAKE_VERSION GREATER 3.7.9) OR (CMAKE_VERSION EQUAL 3.7.9))
@@ -79,9 +75,7 @@ if ((CMAKE_VERSION GREATER 3.7.9) OR (CMAKE_VERSION EQUAL 3.7.9))
 endif()
 
 install(TARGETS GSL EXPORT GSLConfig
-  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 )
 install(
     DIRECTORY include/gsl