From db2ecf3f9a3c31161621836900230d9a9ec0de6b Mon Sep 17 00:00:00 2001
From: Ian McInerney <i.mcinerney17@imperial.ac.uk>
Date: Wed, 1 May 2024 17:15:41 +0100
Subject: [PATCH] Configure QDLDL include files to build directory

Configuring into the source tree means the configured headers will clash
if you try to build multiple configurations at once, so instead
configure them into the build directory and then use those and install
those to ensure each configuration has the correct header.
---
 CMakeLists.txt | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 26db59c..f107184 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -103,11 +103,11 @@ set(QDLDL_BOOL_TYPE "unsigned char")
 # Generate header file with the global options
 # ---------------------------------------------
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/configure/qdldl_types.h.in
-               ${CMAKE_CURRENT_SOURCE_DIR}/include/qdldl_types.h
+               ${CMAKE_CURRENT_BINARY_DIR}/include/qdldl_types.h
                NEWLINE_STYLE LF)
 
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/configure/qdldl_version.h.in
-               ${CMAKE_CURRENT_SOURCE_DIR}/include/qdldl_version.h
+               ${CMAKE_CURRENT_BINARY_DIR}/include/qdldl_version.h
                NEWLINE_STYLE LF)
 
 
@@ -121,14 +121,16 @@ set(
 set(
 	qdldl_headers
 	include/qdldl.h
-	include/qdldl_types.h
-	include/qdldl_version.h
+	${CMAKE_CURRENT_BINARY_DIR}/include/qdldl_types.h
+	${CMAKE_CURRENT_BINARY_DIR}/include/qdldl_version.h
 	)
 
 # Create object library
 # ----------------------------------------------
 add_library (qdldlobject OBJECT ${qdldl_src} ${qdldl_headers})
-target_include_directories(qdldlobject PRIVATE ${PROJECT_SOURCE_DIR}/include)
+target_include_directories(qdldlobject PRIVATE
+                           ${CMAKE_CURRENT_SOURCE_DIR}/include
+                           ${CMAKE_CURRENT_BINARY_DIR}/include)
 
 
 # Create Static Library
@@ -147,6 +149,7 @@ if( QDLDL_BUILD_STATIC_LIB )
     # Declare include directories for the cmake exported target
     target_include_directories(qdldlstatic
                                PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
+                                      "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>"
                                       "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}/qdldl>")
 
     # Install Static Library
@@ -182,7 +185,8 @@ if( QDLDL_BUILD_SHARED_LIB )
     # Declare include directories for the cmake exported target
     target_include_directories(qdldl
         PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
-        "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}/qdldl>")
+               "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>"
+               "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}/qdldl>")
 
     # Install qdldl shared library
     install(TARGETS qdldl