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From: Sebastian Kuzminsky <sebastiankuzminsky@desktopmetal.com>
Date: Thu, 19 May 2022 12:37:51 -0600
Subject: fix USE_SYSTEM_LIBRARIES for clipper/polyclipping
---
CMakeLists.txt | 22 +++++++++------
cmake/FindPolyclipping.cmake | 67 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 81 insertions(+), 8 deletions(-)
create mode 100644 cmake/FindPolyclipping.cmake
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2ee6c68..60bb46f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,8 @@ option(USE_SYSTEM_LIBS "Use the system libraries if available" OFF)
option(ENABLE_MORE_COMPILER_OPTIMIZATION_FLAGS "Enable more optimization flags" ON)
option(EXTENSIVE_WARNINGS "Compile with all warnings" OFF)
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+
if(NOT APPLE)
option(ENABLE_OPENMP "Use OpenMP for parallel code" ON)
endif()
@@ -261,14 +263,18 @@ if(ENABLE_ARCUS)
endif()
endif()
-find_package(clipper 6.4.2 QUIET)
-if (NOT TARGET clipper::clipper)
- add_library(clipper::clipper STATIC libs/clipper/clipper.cpp)
- target_include_directories(clipper::clipper
- PUBLIC
- $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/libs/clipper/include>
- $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
- )
+if(USE_SYSTEM_LIBS)
+ find_package(Polyclipping REQUIRED)
+else()
+ find_package(clipper 6.4.2 QUIET)
+ if (NOT TARGET clipper::clipper)
+ add_library(clipper::clipper STATIC libs/clipper/clipper.cpp)
+ target_include_directories(clipper::clipper
+ PUBLIC
+ $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/libs/clipper/include>
+ $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+ )
+ endif ()
endif ()
find_package(rapidjson 1.1.0 QUIET)
diff --git a/cmake/FindPolyclipping.cmake b/cmake/FindPolyclipping.cmake
new file mode 100644
index 0000000..7c88ab6
--- /dev/null
+++ b/cmake/FindPolyclipping.cmake
@@ -0,0 +1,67 @@
+#
+# - Try to find the polyclipping library
+# this will define
+#
+# Polyclipping_FOUND - polyclipping was found
+# Polyclipping_INCLUDE_DIRS - the polyclipping include directory
+# Polyclipping_LIBRARIES - The libraries needed to use polyclipping
+# Polyclipping_VERSION - The polyclipping library version
+
+#=============================================================================
+# Copyright (c) 2017 Christophe Giboudeaux <christophe@krop.fr>
+#
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+# 3. The name of the author may not be used to endorse or promote products
+# derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#=============================================================================
+
+
+find_package(PkgConfig QUIET)
+pkg_check_modules(PC_Polyclipping QUIET polyclipping)
+
+find_path(Polyclipping_INCLUDE_DIRS
+ NAMES clipper.hpp
+ HINTS ${PC_Polyclipping_INCLUDE_DIRS}
+)
+
+find_library(Polyclipping_LIBRARIES
+ NAMES polyclipping
+ HINTS ${PC_Polyclipping_LIBRARY_DIRS}
+)
+
+if(EXISTS ${Polyclipping_INCLUDE_DIRS}/clipper.hpp)
+ file(READ ${Polyclipping_INCLUDE_DIRS}/clipper.hpp CLIPPER_H_CONTENT)
+ string(REGEX MATCH "#define CLIPPER_VERSION[ ]+\"[0-9]+.[0-9]+.[0-9]+\"" CLIPPER_H_VERSION_MATCH ${CLIPPER_H_CONTENT})
+ string(REGEX REPLACE "^.*CLIPPER_VERSION[ ]+\"([0-9]+.[0-9]+.[0-9]+).*$" "\\1" Polyclipping_VERSION "${CLIPPER_H_VERSION_MATCH}")
+endif()
+
+include(FindPackageHandleStandardArgs)
+
+find_package_handle_standard_args(Polyclipping
+ FOUND_VAR Polyclipping_FOUND
+ REQUIRED_VARS Polyclipping_LIBRARIES Polyclipping_INCLUDE_DIRS
+ VERSION_VAR Polyclipping_VERSION
+)
+
+mark_as_advanced(Polyclipping_LIBRARIES Polyclipping_INCLUDE_DIRS Polyclipping_VERSION)
+
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