Update compiler dialect flags to use C++17 (#970)

* Update compiler dialect flags to use C++17

* More needed debug options

* Fixing build issue on Linux

Details: using multiple channels (main, anaconda, conda-forge) in a
conda build, causes older version of kernel-headers_linux-64 to be resolved,
as newer version fails dependency resolution to meet glibc >=2.17 requirement
(that seems to be deps resolution problem).
As a result 'old' system headers used together with c++17 flag leads to
broken build due to not declared '::timespec_get' in ctime.h.

* Updating compiler flags for OSX to resolve build issue

Author: kozlov-alexey

buildscripts/build.py

@@ -72,6 +72,6 @@ def build(sdc_utils):
         sdc_env_packages += ['conda-verify', 'vc', 'vs2015_runtime', 'vs2015_win-64', 'pywin32=223']
     # Install conda-build and other packages from anaconda channel due to issue with wheel
     # output build if use intel channels first
-    sdc_utils.create_environment(sdc_env_packages + ['-c', 'anaconda'])
+    sdc_utils.create_environment(sdc_env_packages)
 
     build(sdc_utils)

buildscripts/utilities.py

@@ -51,7 +51,7 @@ def __init__(self, python, channels=None, sdc_channel=None):
         self.line_single = '-'*80
 
         # Set channels
-        build_channels = ['-c', 'defaults', '-c', 'conda-forge']
+        build_channels = ['-c', 'main', '-c', 'conda-forge', '-c', 'defaults']
         self.channel_list = build_channels if channels is None else channels.split()
         if sdc_channel:
             self.sdc_channel = Path(sdc_channel).resolve().as_uri()

conda-recipe/meta.yaml

@@ -19,7 +19,7 @@ requirements:
   build:
     - {{ compiler('c') }}      # [not osx]
     - {{ compiler('cxx') }}    # [not osx]
-    - numba   {{ NUMBA_VERSION }}
+    - sysroot_linux-64 >=2.17  # [linux]
 
   host:
     - python

setup.py

@@ -48,6 +48,7 @@
 np_compile_args = np_misc.get_info('npymath')
 
 is_win = platform.system() == 'Windows'
+is_osx = platform.system() == 'Darwin'
 
 
 def readme():
@@ -108,11 +109,21 @@ def check_file_at_path(path2file):
 tbb_root = os.getenv('TBBROOT')
 if not tbb_root:
     tbb_root = check_file_at_path(['include', 'tbb', 'tbb.h'])
+    assert tbb_root, "TBB headers required to build SDC not found"
 
 ind = [PREFIX_DIR + '/include', ]
 lid = [PREFIX_DIR + '/lib', ]
-eca = ['-std=c++11', "-O3", "-DTBB_PREVIEW_WAITING_FOR_WORKERS=1"]  # '-g', '-O0']
-ela = ['-std=c++11', ]
+
+if is_win:
+    eca = ['/std:c++17', "/Ox", "/DTBB_PREVIEW_WAITING_FOR_WORKERS=1", ]  # "/Zi", "/Od", "/DEBUG:FULL"]
+    ela = []  # '/DEBUG:FULL', ]
+else:
+    eca = ['-std=c++17', "-O3", "-DTBB_PREVIEW_WAITING_FOR_WORKERS=1", ]  # '-g', '-O0']
+    ela = []
+
+    # On macOS, c++17 flag is ignored unless this flag is also passed to distutils
+    if is_osx:
+        eca += ["-fno-aligned-allocation"]
 
 io_libs = []
 
@@ -202,8 +213,8 @@ def check_file_at_path(path2file):
                    sources=["sdc/_datetime_ext.cpp"],
                    libraries=np_compile_args['libraries'],
                    define_macros=np_compile_args['define_macros'],
-                   extra_compile_args=['-std=c++11'],
-                   extra_link_args=['-std=c++11'],
+                   extra_compile_args=eca,
+                   extra_link_args=ela,
                    include_dirs=np_compile_args['include_dirs'],
                    library_dirs=np_compile_args['library_dirs'],
                    language="c++"