added FindLibyaml.cmake

pub/CMakeLists.txt

@@ -39,6 +39,7 @@ find_package(Readline REQUIRED)
 find_package(GSL REQUIRED)
 find_package(FFTW_DBL REQUIRED)
 find_package(YamlCpp05 REQUIRED)
+find_package(Libyaml REQUIRED)
 find_package(KWW REQUIRED)
 find_package(Cerf REQUIRED) # currently we only accept the C version of the library
 find_package(LMFit REQUIRED)

pub/cmake/modules/FindLibyaml.cmake

+# Find libyaml with API version ?.?
+#
+# Usage:
+#   find_package(libyaml [REQUIRED] [QUIET])
+#
+# Sets the following variables:
+#   - LIBYAML_FOUND          .. true if library is found
+#   - LIBYAML_LIBRARIES      .. full path to library
+#   - LIBYAML_INCLUDE_DIR    .. full path to include directory
+#
+# Honors the following optional variables:
+#   - LIBYAML_INCLUDE_LOC    .. include directory path, to be searched before defaults
+#   - LIBYAML_LIBRARY_LOC    .. the library's directory path, to be searched before defaults
+#   - LIBYAML_STATIC_LIBRARY .. if true, find the static library version
+#
+# Copyright 2015 Joachim Wuttke, Forschungszentrum Jülich.
+# Redistribution permitted.
+
+include (CheckCppIncludeFile)
+include (CheckCXXSourceRuns)
+
+# find the yaml-cpp include directory
+find_path(LIBYAML_INCLUDE_DIR yaml/yaml.h
+    PATH_SUFFIXES include yaml/include yaml
+    PATHS
+    ${LIBYAML_INCLUDE_LOC}
+    ~/Library/Frameworks/
+    /Library/Frameworks/
+    /usr/local/
+    /usr/
+    /sw/ # Fink
+    /opt/local/ # DarwinPorts
+    /opt/csw/ # Blastwave
+    /opt/
+    )
+
+set(CMAKE_REQUIRED_INCLUDES ${LIBYAML_INCLUDE_DIR})
+set(CMAKE_REQUIRED_QUIET True)
+
+# detect version (see comment by sanssecours at https://github.com/jbeder/yaml-cpp/issues/604)
+#find_package (PkgConfig)
+#pkg_check_modules (PC_YAML-CPP QUIET yaml-cpp)
+#set (YAML-CPP_VERSION ${PC_YAML-CPP_VERSION})
+#if (YAML-CPP_VERSION VERSION_LESS "0.5.0")
+#    message(FATAL_ERROR "Found YAMLCPP version ${YAML-CPP_VERSION}; needs at least 0.5.0")
+#endif()
+
+# now look for needed yaml-cpp0.5 include files
+#unset(YAMLCPP_FOUND_05 CACHE)
+#check_include_file("yaml-cpp/node/detail/iterator_fwd.h" YAMLCPP_FOUND_05)
+#if(${YAMLCPP_FOUND_05})
+#else()
+#    message(FATAL_ERROR "Include file for libyaml-cpp0.5 not found")
+#endif()
+
+# attempt to find static library first if this is set
+if(LIBYAML_STATIC_LIBRARY)
+    set(LIBYAML_STATIC libyaml.a)
+endif()
+
+# find the libyaml library
+find_library(LIBYAML_LIBRARY
+    NAMES ${LIBYAML_STATIC} yaml
+    PATH_SUFFIXES lib64 lib
+    PATHS
+    ${LIBYAML_LIBRARY_LOC}
+    ~/Library/Frameworks
+    /Library/Frameworks
+    /usr/local
+    /usr
+    /sw
+    /opt/local
+    /opt/csw
+    /opt
+    )
+
+message(STATUS
+    "libyaml: FOUND=${LIBYAML_FOUND}, VERSION=${LIBYAML_VERSION}, LIB=${LIBYAML_LIBRARY}")
+
+# try to compile, link, and run a test program
+# --- outcommented because of bug in yamlcpp-0.5 [https://stackoverflow.com/questions/53234192]
+# unset(YAMLCPP_RUNS CACHE)
+# set(CMAKE_REQUIRED_LIBRARIES yaml-cpp)
+# check_cxx_source_runs("#include \"yaml-cpp/yaml.h\"\n#include <assert.h>\nint main() {\n    YAML::Node node = YAML::Load(\"[1, 2, 3]\");\n    assert(node.IsSequence());\n}" YAMLCPP_RUNS)
+# if(${YAMLCPP_RUNS})
+# else()
+#     message(FATAL_ERROR "Test of libyaml-cpp failed")
+# endif()
+
+message(STATUS "Found FindLibyaml: ${LIBYAML_LIBRARY}")
+mark_as_advanced(LIBYAML_INCLUDE_DIR LIBYAML_LIBRARY)