Fix the parallel build with cmake 3.11

Copy UseSWIG.cmake from the gnuradio repository from commit
4433a7703fe3f5713c2200a0f7c11b13510f34cc

This macro is distributed in the Debian's gnuradio-dev package but it's
not available in Fedora/Centos gnuradio-devel package. The gnuradio's
version contains a fix for the parallel build 99a09af05fda6d0bab0cf3724a1c6bf453c71bc7
and some other improvements as well.

2 files changed, 306 insertions, 0 deletions

diff --git a/cmake/Modules/UseSWIG.cmake b/cmake/Modules/UseSWIG.cmake
new file mode 100644
index 0000000..e555435
--- /dev/null
+++ b/cmake/Modules/UseSWIG.cmake
@@ -0,0 +1,305 @@
+# - SWIG module for CMake
+# Defines the following macros:
+#   SWIG_ADD_MODULE(name language [ files ])
+#     - Define swig module with given name and specified language
+#   SWIG_LINK_LIBRARIES(name [ libraries ])
+#     - Link libraries to swig module
+# All other macros are for internal use only.
+# To get the actual name of the swig module,
+# use: ${SWIG_MODULE_${name}_REAL_NAME}.
+# Set Source files properties such as CPLUSPLUS and SWIG_FLAGS to specify
+# special behavior of SWIG. Also global CMAKE_SWIG_FLAGS can be used to add
+# special flags to all swig calls.
+# Another special variable is CMAKE_SWIG_OUTDIR, it allows one to specify
+# where to write all the swig generated module (swig -outdir option)
+# The name-specific variable SWIG_MODULE_<name>_EXTRA_DEPS may be used
+# to specify extra dependencies for the generated modules.
+# If the source file generated by swig need some special flag you can use
+# set_source_files_properties( ${swig_generated_file_fullname}
+#        PROPERTIES COMPILE_FLAGS "-bla")
+
+
+#=============================================================================
+# Copyright 2004-2009 Kitware, Inc.
+# Copyright 2009 Mathieu Malaterre <mathieu.malaterre@gmail.com>
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+set(SWIG_CXX_EXTENSION "cxx")
+set(SWIG_EXTRA_LIBRARIES "")
+
+set(SWIG_PYTHON_EXTRA_FILE_EXTENSION "py")
+
+#
+# For given swig module initialize variables associated with it
+#
+macro(SWIG_MODULE_INITIALIZE name language)
+  string(TOUPPER "${language}" swig_uppercase_language)
+  string(TOLOWER "${language}" swig_lowercase_language)
+  set(SWIG_MODULE_${name}_LANGUAGE "${swig_uppercase_language}")
+  set(SWIG_MODULE_${name}_SWIG_LANGUAGE_FLAG "${swig_lowercase_language}")
+
+  set(SWIG_MODULE_${name}_REAL_NAME "${name}")
+  if("${SWIG_MODULE_${name}_LANGUAGE}" STREQUAL "UNKNOWN")
+    message(FATAL_ERROR "SWIG Error: Language \"${language}\" not found")
+  elseif("${SWIG_MODULE_${name}_LANGUAGE}" STREQUAL "PYTHON")
+    # when swig is used without the -interface it will produce in the module.py
+    # a 'import _modulename' statement, which implies having a corresponding
+    # _modulename.so (*NIX), _modulename.pyd (Win32).
+    set(SWIG_MODULE_${name}_REAL_NAME "_${name}")
+  elseif("${SWIG_MODULE_${name}_LANGUAGE}" STREQUAL "PERL")
+    set(SWIG_MODULE_${name}_EXTRA_FLAGS "-shadow")
+  endif()
+endmacro()
+
+#
+# For a given language, input file, and output file, determine extra files that
+# will be generated. This is internal swig macro.
+#
+
+macro(SWIG_GET_EXTRA_OUTPUT_FILES language outfiles generatedpath infile)
+  set(${outfiles} "")
+  get_source_file_property(SWIG_GET_EXTRA_OUTPUT_FILES_module_basename
+    ${infile} SWIG_MODULE_NAME)
+  if(SWIG_GET_EXTRA_OUTPUT_FILES_module_basename STREQUAL "NOTFOUND")
+    get_filename_component(SWIG_GET_EXTRA_OUTPUT_FILES_module_basename "${infile}" NAME_WE)
+  endif()
+  foreach(it ${SWIG_${language}_EXTRA_FILE_EXTENSION})
+    set(${outfiles} ${${outfiles}}
+      "${generatedpath}/${SWIG_GET_EXTRA_OUTPUT_FILES_module_basename}.${it}")
+  endforeach()
+endmacro()
+
+#
+# Take swig (*.i) file and add proper custom commands for it
+#
+macro(SWIG_ADD_SOURCE_TO_MODULE name outfiles infile)
+  set(swig_full_infile ${infile})
+  get_filename_component(swig_source_file_path "${infile}" PATH)
+  get_filename_component(swig_source_file_name_we "${infile}" NAME_WE)
+  get_source_file_property(swig_source_file_generated ${infile} GENERATED)
+  get_source_file_property(swig_source_file_cplusplus ${infile} CPLUSPLUS)
+  get_source_file_property(swig_source_file_flags ${infile} SWIG_FLAGS)
+  if("${swig_source_file_flags}" STREQUAL "NOTFOUND")
+    set(swig_source_file_flags "")
+  endif()
+  set(swig_source_file_fullname "${infile}")
+  if(${swig_source_file_path} MATCHES "^${CMAKE_CURRENT_SOURCE_DIR}")
+    string(REGEX REPLACE
+      "^${CMAKE_CURRENT_SOURCE_DIR}" ""
+      swig_source_file_relative_path
+      "${swig_source_file_path}")
+  else()
+    if(${swig_source_file_path} MATCHES "^${CMAKE_CURRENT_BINARY_DIR}")
+      string(REGEX REPLACE
+        "^${CMAKE_CURRENT_BINARY_DIR}" ""
+        swig_source_file_relative_path
+        "${swig_source_file_path}")
+      set(swig_source_file_generated 1)
+    else()
+      set(swig_source_file_relative_path "${swig_source_file_path}")
+      if(swig_source_file_generated)
+        set(swig_source_file_fullname "${CMAKE_CURRENT_BINARY_DIR}/${infile}")
+      else()
+        set(swig_source_file_fullname "${CMAKE_CURRENT_SOURCE_DIR}/${infile}")
+      endif()
+    endif()
+  endif()
+
+  set(swig_generated_file_fullname
+    "${CMAKE_CURRENT_BINARY_DIR}")
+  if(swig_source_file_relative_path)
+    set(swig_generated_file_fullname
+      "${swig_generated_file_fullname}/${swig_source_file_relative_path}")
+  endif()
+  # If CMAKE_SWIG_OUTDIR was specified then pass it to -outdir
+  if(CMAKE_SWIG_OUTDIR)
+    set(swig_outdir ${CMAKE_SWIG_OUTDIR})
+  else()
+    set(swig_outdir ${CMAKE_CURRENT_BINARY_DIR})
+  endif()
+  SWIG_GET_EXTRA_OUTPUT_FILES(${SWIG_MODULE_${name}_LANGUAGE}
+    swig_extra_generated_files
+    "${swig_outdir}"
+    "${infile}")
+  set(swig_generated_file_fullname
+    "${swig_generated_file_fullname}/${swig_source_file_name_we}")
+  # add the language into the name of the file (i.e. TCL_wrap)
+  # this allows for the same .i file to be wrapped into different languages
+  set(swig_generated_file_fullname
+    "${swig_generated_file_fullname}${SWIG_MODULE_${name}_LANGUAGE}_wrap")
+
+  if(swig_source_file_cplusplus)
+    set(swig_generated_file_fullname
+      "${swig_generated_file_fullname}.${SWIG_CXX_EXTENSION}")
+  else()
+    set(swig_generated_file_fullname
+      "${swig_generated_file_fullname}.c")
+  endif()
+
+  # Shut up some warnings from poor SWIG code generation that we
+  # can do nothing about, when this flag is available
+  include(CheckCXXCompilerFlag)
+  check_cxx_compiler_flag("-Wno-unused-but-set-variable" HAVE_WNO_UNUSED_BUT_SET_VARIABLE)
+  if(HAVE_WNO_UNUSED_BUT_SET_VARIABLE)
+    set_source_files_properties(${swig_generated_file_fullname}
+      PROPERTIES COMPILE_FLAGS "-Wno-unused-but-set-variable")
+  endif(HAVE_WNO_UNUSED_BUT_SET_VARIABLE)
+
+  get_directory_property(cmake_include_directories INCLUDE_DIRECTORIES)
+  list(REMOVE_DUPLICATES cmake_include_directories)
+  set(swig_include_dirs)
+  foreach(it ${cmake_include_directories})
+    set(swig_include_dirs ${swig_include_dirs} "-I${it}")
+  endforeach()
+
+  set(swig_special_flags)
+  # default is c, so add c++ flag if it is c++
+  if(swig_source_file_cplusplus)
+    set(swig_special_flags ${swig_special_flags} "-c++")
+  endif()
+  set(swig_extra_flags)
+  if(SWIG_MODULE_${name}_EXTRA_FLAGS)
+    set(swig_extra_flags ${swig_extra_flags} ${SWIG_MODULE_${name}_EXTRA_FLAGS})
+  endif()
+
+  # hack to work around CMake bug in add_custom_command with multiple OUTPUT files
+
+  file(RELATIVE_PATH reldir ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_BINARY_DIR})
+  execute_process(
+    COMMAND ${PYTHON_EXECUTABLE} -c "import re, hashlib
+unique = hashlib.md5('${reldir}${ARGN}').hexdigest()[:5]
+print(re.sub('\\W', '_', '${name} ${reldir} ' + unique))"
+    OUTPUT_VARIABLE _target OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
+
+  file(
+    WRITE ${CMAKE_CURRENT_BINARY_DIR}/${_target}.cpp.in
+   "int main(void){return 0;}\n"
+  )
+
+  # create dummy dependencies
+  add_custom_command(
+    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${_target}.cpp
+    COMMAND ${CMAKE_COMMAND} -E copy
+        ${CMAKE_CURRENT_BINARY_DIR}/${_target}.cpp.in
+        ${CMAKE_CURRENT_BINARY_DIR}/${_target}.cpp
+    DEPENDS "${swig_source_file_fullname}" ${SWIG_MODULE_${name}_EXTRA_DEPS}
+    COMMENT ""
+  )
+
+  # create the dummy target
+  add_executable(${_target} ${CMAKE_CURRENT_BINARY_DIR}/${_target}.cpp)
+
+  # add a custom command to the dummy target
+  add_custom_command(
+    TARGET ${_target}
+    # Let's create the ${swig_outdir} at execution time, in case dir contains $(OutDir)
+    COMMAND ${CMAKE_COMMAND} -E make_directory ${swig_outdir}
+    COMMAND "${SWIG_EXECUTABLE}"
+    ARGS "-${SWIG_MODULE_${name}_SWIG_LANGUAGE_FLAG}"
+    ${swig_source_file_flags}
+    ${CMAKE_SWIG_FLAGS}
+    -outdir ${swig_outdir}
+    ${swig_special_flags}
+    ${swig_extra_flags}
+    ${swig_include_dirs}
+    -o "${swig_generated_file_fullname}"
+    "${swig_source_file_fullname}"
+    COMMENT "Swig source"
+  )
+
+  #add dummy independent dependencies from the _target to each file
+  #that will be generated by the SWIG command above
+
+  set(${outfiles} "${swig_generated_file_fullname}" ${swig_extra_generated_files})
+
+  foreach(swig_gen_file ${${outfiles}})
+    add_custom_command(
+      OUTPUT ${swig_gen_file}
+      COMMAND "${CMAKE_COMMAND}" -E touch_nocreate "${swig_gen_file}"
+      DEPENDS ${_target}
+      COMMENT "dummy command to show ${_target} dependency of ${swig_gen_file}"
+    )
+  endforeach()
+
+  set_source_files_properties(
+    ${outfiles} PROPERTIES GENERATED 1
+  )
+
+endmacro()
+
+#
+# Create Swig module
+#
+macro(SWIG_ADD_MODULE name language)
+  SWIG_MODULE_INITIALIZE(${name} ${language})
+  set(swig_dot_i_sources)
+  set(swig_other_sources)
+  foreach(it ${ARGN})
+    if(${it} MATCHES ".*\\.i$")
+      set(swig_dot_i_sources ${swig_dot_i_sources} "${it}")
+    else()
+      set(swig_other_sources ${swig_other_sources} "${it}")
+    endif()
+  endforeach()
+
+  set(swig_generated_sources)
+  foreach(it ${swig_dot_i_sources})
+    SWIG_ADD_SOURCE_TO_MODULE(${name} swig_generated_source ${it})
+    set(swig_generated_sources ${swig_generated_sources} "${swig_generated_source}")
+  endforeach()
+  get_directory_property(swig_extra_clean_files ADDITIONAL_MAKE_CLEAN_FILES)
+  set_directory_properties(PROPERTIES
+    ADDITIONAL_MAKE_CLEAN_FILES "${swig_extra_clean_files};${swig_generated_sources}")
+  add_library(${SWIG_MODULE_${name}_REAL_NAME}
+    MODULE
+    ${swig_generated_sources}
+    ${swig_other_sources})
+  string(TOLOWER "${language}" swig_lowercase_language)
+  if ("${swig_lowercase_language}" STREQUAL "java")
+    if (APPLE)
+        # In java you want:
+        #      System.loadLibrary("LIBRARY");
+        # then JNI will look for a library whose name is platform dependent, namely
+        #   MacOS  : libLIBRARY.jnilib
+        #   Windows: LIBRARY.dll
+        #   Linux  : libLIBRARY.so
+        set_target_properties (${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES SUFFIX ".jnilib")
+      endif ()
+  endif ()
+  if ("${swig_lowercase_language}" STREQUAL "python")
+    # this is only needed for the python case where a _modulename.so is generated
+    set_target_properties(${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES PREFIX "")
+    # Python extension modules on Windows must have the extension ".pyd"
+    # instead of ".dll" as of Python 2.5.  Older python versions do support
+    # this suffix.
+    # http://docs.python.org/whatsnew/ports.html#SECTION0001510000000000000000
+    # <quote>
+    # Windows: .dll is no longer supported as a filename extension for extension modules.
+    # .pyd is now the only filename extension that will be searched for.
+    # </quote>
+    if(WIN32 AND NOT CYGWIN)
+      set_target_properties(${SWIG_MODULE_${name}_REAL_NAME} PROPERTIES SUFFIX ".pyd")
+    endif()
+  endif ()
+endmacro()
+
+#
+# Like TARGET_LINK_LIBRARIES but for swig modules
+#
+macro(SWIG_LINK_LIBRARIES name)
+  if(SWIG_MODULE_${name}_REAL_NAME)
+    target_link_libraries(${SWIG_MODULE_${name}_REAL_NAME} ${ARGN})
+  else()
+    message(SEND_ERROR "Cannot find Swig library \"${name}\".")
+  endif()
+endmacro()
diff --git a/tests/dockerfiles/Fedora_26.Dockerfile b/tests/dockerfiles/Fedora_26.Dockerfile
index 745d89a..6beb83d 100644
--- a/tests/dockerfiles/Fedora_26.Dockerfile
+++ b/tests/dockerfiles/Fedora_26.Dockerfile
@@ -22,6 +22,7 @@ RUN cmake .. && \
         # and .gnuradio directories do not exist
         mkdir $HOME/.grc_gnuradio/ $HOME/.gnuradio/ && \
         make && \
+        make -j $(nproc) && \
         make install && \
         ldconfig && \
         make test