From 81b8e7a6bc08b885b79d5af73301fc1d41613172 Mon Sep 17 00:00:00 2001
From: Magnus Jacobsson <magnus.jacobsson@berotec.se>
Date: Mon, 14 Sep 2020 23:34:49 +0200
Subject: [PATCH] Fix lib/pack objs not included in lib/gvc dynamic lib for
 CMake builds

This is what the autotools builds do.

For some reason this was not a problem on Windows.

Without this, the rtest/test_examples.py gave errors like this for neatopack.c:

neatopack.c:(.text+0x81): undefined reference to `ccomps'
---
 lib/gvc/CMakeLists.txt  | 2 +-
 lib/pack/CMakeLists.txt | 8 ++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/lib/gvc/CMakeLists.txt b/lib/gvc/CMakeLists.txt
index ed4cbab2e..1db89a0ab 100644
--- a/lib/gvc/CMakeLists.txt
+++ b/lib/gvc/CMakeLists.txt
@@ -51,13 +51,13 @@ target_include_directories(gvc PRIVATE
 
 target_link_libraries(gvc PRIVATE
     $<TARGET_OBJECTS:common_obj>
+    $<TARGET_OBJECTS:pack_obj>
 )
 
 target_link_libraries(gvc PUBLIC
     cdt
     cgraph
     label
-    pack
     pathplan
     xdot
     ${EXPAT_LIBRARIES}
diff --git a/lib/pack/CMakeLists.txt b/lib/pack/CMakeLists.txt
index 54dc9523a..87d6d0cc8 100644
--- a/lib/pack/CMakeLists.txt
+++ b/lib/pack/CMakeLists.txt
@@ -1,6 +1,6 @@
 add_definitions(-DGVC_EXPORTS)
 
-add_library(pack STATIC
+add_library(pack_obj OBJECT
     # Header files
     pack.h
 
@@ -9,7 +9,7 @@ add_library(pack STATIC
     pack.c
 )
 
-target_include_directories(pack PRIVATE
+target_include_directories(pack_obj PRIVATE
     ${GRAPHVIZ_LIB_DIR}
     ${CMAKE_CURRENT_SOURCE_DIR}
     ${GRAPHVIZ_LIB_DIR}/cdt
@@ -20,6 +20,10 @@ target_include_directories(pack PRIVATE
     ${GRAPHVIZ_LIB_DIR}/pathplan
 )
 
+add_library(pack STATIC
+    $<TARGET_OBJECTS:pack_obj>
+)
+
 # Specify headers to be installed
 install(
     FILES pack.h
-- 
2.40.0