From 20a041e0efd02b481b91c1df93d112150b09854f Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Tue, 3 Nov 2015 22:05:20 +0300
Subject: [PATCH] DXF: initial libdxfrw import.

We had to fork libdxfrw since the upstream doesn't have a git
repository, a CMake buildsystem, and is quite buggy.

libdxfrw is also used in LibreCAD, but they just vendored
their version.
---
 .gitmodules        | 3 +++
 CMakeLists.txt     | 5 ++++-
 extlib/libdxfrw    | 1 +
 src/CMakeLists.txt | 1 +
 4 files changed, 9 insertions(+), 1 deletion(-)
 create mode 160000 extlib/libdxfrw

diff --git a/.gitmodules b/.gitmodules
index 342149a..58637a7 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -8,3 +8,6 @@
 [submodule "extlib/libfreetype"]
 	path = extlib/libfreetype
 	url = http://git.sv.nongnu.org/r/freetype/freetype2.git
+[submodule "extlib/libdxfrw"]
+	path = extlib/libdxfrw
+	url = https://github.com/whitequark/libdxfrw.git
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2f0014c..7495d32 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,6 +72,9 @@ CHECK_INCLUDE_FILE("stdint.h" HAVE_STDINT_H)
 
 find_package(OpenGL REQUIRED)
 
+message(STATUS "Using in-tree libdxfrw")
+add_subdirectory(extlib/libdxfrw)
+
 if(WIN32)
     # We don't want any of the subprojects to install anything.
     # We don't actually install anything on Windows (so overriding
@@ -103,9 +106,9 @@ if(WIN32)
 
     if(NOT ZLIB_FOUND)
         message(STATUS "Using in-tree zlib")
-
         add_subdirectory(extlib/zlib)
 
+        message(STATUS "Using in-tree libpng")
         set(ZLIB_LIBRARY
             zlibstatic)
         set(ZLIB_INCLUDE_DIR
diff --git a/extlib/libdxfrw b/extlib/libdxfrw
new file mode 160000
index 0000000..a6f7c0a
--- /dev/null
+++ b/extlib/libdxfrw
@@ -0,0 +1 @@
+Subproject commit a6f7c0a9ff7b9dd847a1c673f7c414c3e10c4022
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f1f12fe..164da8e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -319,6 +319,7 @@ add_executable(solvespace WIN32 MACOSX_BUNDLE
     ${solvespace_SOURCES})
 
 target_link_libraries(solvespace
+    dxfrw
     ${OPENGL_LIBRARIES}
     ${PNG_LIBRARIES}
     ${ZLIB_LIBRARIES}