From cef299eb4203c64da8fbfd1b2e434d8b2783501b Mon Sep 17 00:00:00 2001
From: Nehal J Wani <nehaljw.kkd1@gmail.com>
Date: Tue, 16 Feb 2021 18:38:18 -0500
Subject: [PATCH] CMake: Add support for GNU Triangulated Surface Library

---
 CMakeLists.txt              |  1 +
 cmake/FindGTS.cmake         | 50 +++++++++++++++++++++++++++++++++++++
 cmake/config_checks.cmake   |  1 +
 config-cmake.h.in           |  1 +
 lib/neatogen/CMakeLists.txt | 11 ++++++++
 5 files changed, 64 insertions(+)
 create mode 100644 cmake/FindGTS.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e425ae38c..2883c2565 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -113,6 +113,7 @@ if(with_expat)
 endif()
 
 find_package(GD)
+find_package(GTS)
 
 if(enable_ltdl)
   find_package(LTDL)
diff --git a/cmake/FindGTS.cmake b/cmake/FindGTS.cmake
new file mode 100644
index 000000000..ae4176abe
--- /dev/null
+++ b/cmake/FindGTS.cmake
@@ -0,0 +1,50 @@
+include(FindPackageHandleStandardArgs)
+if(WIN32)
+  find_path(GTS_INCLUDE_DIR gts.h)
+  find_path(GLIB_INCLUDE_DIR glib.h PATH_SUFFIXES glib-2.0)
+  find_path(GLIBCONFIG_INCLUDE_DIR glibconfig.h
+            PATH_SUFFIXES glib-2.0/include lib/glib-2.0/include)
+
+  find_library(GTS_LIBRARY NAMES gts)
+  find_library(GLIB_LIBRARY NAMES glib-2.0)
+
+  find_program(GTS_RUNTIME_LIBRARY gts.dll)
+  find_program(GLIB_RUNTIME_LIBRARY NAMES glib-2.dll libglib-2.0-0.dll)
+
+  find_package_handle_standard_args(GTS DEFAULT_MSG
+    GTS_INCLUDE_DIR
+    GLIB_INCLUDE_DIR
+    GLIBCONFIG_INCLUDE_DIR
+
+    GTS_LIBRARY
+    GLIB_LIBRARY
+
+    GTS_RUNTIME_LIBRARY
+    GLIB_RUNTIME_LIBRARY
+  )
+
+  set(GTS_INCLUDE_DIRS
+    ${GTS_INCLUDE_DIR}
+    ${GLIB_INCLUDE_DIR}
+    ${GLIBCONFIG_INCLUDE_DIR}
+  )
+
+  set(GTS_LIBRARIES
+    ${GTS_LIBRARY}
+    ${GLIB_LIBRARY}
+  )
+
+  set(GTS_RUNTIME_LIBRARIES
+    ${GTS_RUNTIME_LIBRARY}
+    ${GLIB_RUNTIME_LIBRARY}
+  )
+else()
+  find_package(PkgConfig)
+  pkg_check_modules(GTS gts)
+
+  find_package_handle_standard_args(GTS DEFAULT_MSG
+    GTS_INCLUDE_DIRS
+    GTS_LIBRARIES
+    GTS_LINK_LIBRARIES
+  )
+endif()
diff --git a/cmake/config_checks.cmake b/cmake/config_checks.cmake
index 8046df3e3..d633d0749 100644
--- a/cmake/config_checks.cmake
+++ b/cmake/config_checks.cmake
@@ -32,6 +32,7 @@ if(with_expat AND EXPAT_FOUND)
   set(HAVE_EXPAT 1)
 endif()
 set( HAVE_LIBGD     ${GD_FOUND}         )
+set( HAVE_GTS       ${GTS_FOUND}        )
 if(with_zlib AND ZLIB_FOUND)
   set(HAVE_ZLIB 1)
 endif()
diff --git a/config-cmake.h.in b/config-cmake.h.in
index c850d221b..6017b42b1 100644
--- a/config-cmake.h.in
+++ b/config-cmake.h.in
@@ -39,6 +39,7 @@ typedef SSIZE_T ssize_t;
 #cmakedefine HAVE_GD_FREETYPE
 #cmakedefine HAVE_GD_GIF
 #cmakedefine HAVE_ZLIB
+#cmakedefine HAVE_GTS
 
 // Values
 #define BROWSER "@BROWSER@"
diff --git a/lib/neatogen/CMakeLists.txt b/lib/neatogen/CMakeLists.txt
index 129e65faf..728a2b0ce 100644
--- a/lib/neatogen/CMakeLists.txt
+++ b/lib/neatogen/CMakeLists.txt
@@ -105,4 +105,15 @@ target_link_libraries(neatogen PRIVATE
   gvc
   pathplan
   sparse
+  rbtree
 )
+
+if(GTS_FOUND)
+  target_include_directories(neatogen PRIVATE
+    ${GTS_INCLUDE_DIRS}
+  )
+
+  target_link_libraries(neatogen PRIVATE
+    ${GTS_LINK_LIBRARIES}
+  )
+endif()
-- 
2.50.1