File _service:obs_scm:backport-Improve-CMake-build-s... of Package libyaml

File _service:obs_scm:backport-Improve-CMake-build-system.patch of Package libyaml

From fe3d086fa75a289d6e4085df6f855f4c88c8d7c2 Mon Sep 17 00:00:00 2001
From: Jean-Christophe Fillion-Robin <jchris.fillionr@kitware.com>
Date: Thu, 30 Nov 2017 08:14:27 -0500
Subject: [PATCH] Improve CMake build system

New build options
-----------------

* Add option BUILD_TESTING by default ON
See https://cmake.org/cmake/help/v2.8.12/cmake.html#module:CTest

* Simplify library type selection using standard option BUILD_SHARED_LIBS
See https://cmake.org/cmake/help/v3.0/variable/BUILD_SHARED_LIBS.html

yamlConfig.cmake
----------------

* Generate and install yamlConfig.cmake, yamlConfigVersion.cmake and yamlTargets.cmake

* Bump CMake version and explicitly associate include dirs with targets
See https://cmake.org/cmake/help/v3.0/manual/cmake-buildsystem.7.html#include-directories-and-usage-requirements

* Ensure building against libyaml using "find_package(yaml)" uses expected compile options: Set HAVE_CONFIG_H
as private compile option, YAML_DECLARE_STATIC as public

Testing
-------

* Build all examples from "tests" directory

CMake Best practices
--------------------

* configure "config.h" based on version info found in CMakeLists.txt

* Ensure buildsystem re-generation listing sources (best-practice)

It is not recommended to use GLOB to collect a list of source files from
the source tree. If no CMakeLists.txt file changes when a source is added
or removed then the generated build system cannot know when to ask CMake
to regenerate.

See https://cmake.org/cmake/help/v3.8/command/file.html

Compilation warnings
--------------------

* Set _CRT_SECURE_NO_WARNINGS if building using VisualStudio

This will avoid warnings like this one:

```
C:\projects\libyaml\tests\run-emitter.c(268): warning C4996: 'fopen':
This function or variable may be unsafe. Consider using fopen_s instead.
To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for
details.
```

Continuous Integration
----------------------

* travis: Install CMake >= 3.x using scikit-ci-addons

* Add comments to appveyor.yml and run-tests.sh
---
 cmake/config.h.in    |   4 ++
 tests/CMakeLists.txt |  27 +++++++
 yamlConfig.cmake.in  |  16 +++++
 3 files changed, 47 insertions(+), 0 deletions(-)
 create mode 100644 cmake/config.h.in
 create mode 100644 tests/CMakeLists.txt
 create mode 100644 yamlConfig.cmake.in

diff --git a/cmake/config.h.in b/cmake/config.h.in
new file mode 100644
index 0000000..51e2e24
--- /dev/null
+++ b/cmake/config.h.in
@@ -0,0 +1,4 @@
+#define YAML_VERSION_MAJOR @YAML_VERSION_MAJOR@
+#define YAML_VERSION_MINOR @YAML_VERSION_MINOR@
+#define YAML_VERSION_PATCH @YAML_VERSION_PATCH@
+#define YAML_VERSION_STRING "@YAML_VERSION_STRING@"
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
new file mode 100644
index 0000000..d10b424
--- /dev/null
+++ b/tests/CMakeLists.txt
@@ -0,0 +1,27 @@
+
+function(add_yaml_executable name)
+  add_executable(${name} ${name}.c)
+  target_link_libraries(${name} yaml)
+endfunction()
+
+foreach(name IN ITEMS
+  example-deconstructor
+  example-deconstructor-alt
+  example-reformatter
+  example-reformatter-alt
+  run-dumper
+  run-emitter
+  run-emitter-test-suite
+  run-loader
+  run-parser
+  run-parser-test-suite
+  run-scanner
+  test-reader
+  test-version
+  )
+  add_yaml_executable(${name})
+endforeach()
+
+add_test(NAME version COMMAND test-version)
+add_test(NAME reader COMMAND test-reader)
+
diff --git a/yamlConfig.cmake.in b/yamlConfig.cmake.in
new file mode 100644
index 0000000..dd3f8ee
--- /dev/null
+++ b/yamlConfig.cmake.in
@@ -0,0 +1,16 @@
+# Config file for the yaml library.
+#
+# It defines the following variables:
+#   yaml_LIBRARIES    - libraries to link against
+
+@PACKAGE_INIT@
+
+set_and_check(yaml_TARGETS "@PACKAGE_CONFIG_DIR_CONFIG@/yamlTargets.cmake")
+
+if(NOT yaml_TARGETS_IMPORTED)
+  set(yaml_TARGETS_IMPORTED 1)
+  include(${yaml_TARGETS})
+endif()
+
+set(yaml_LIBRARIES yaml)
+
-- 
2.27.0