Move search for compiler and omp from setup.py (#146)

* Move search for compiler and omp from setup.py

Author: densmirn

setup.py

@@ -49,7 +49,7 @@
 from utils.command_style import source_style
 from utils.command_clean import source_clean
 from utils.command_build_clib import custom_build_clib
-from utils.dpnp_build_utils import find_mathlib
+from utils.dpnp_build_utils import find_cmplr, find_mathlib, find_omp
 
 
 """
@@ -218,18 +218,12 @@
 """
 Get the compiler environemnt
 """
-_cmplr_root = os.environ.get('DPCPPROOT', None)
-if _cmplr_root is None:
-    raise EnvironmentError("Please install Intel OneAPI environment. DPCPPROOT is empty")
+_, _cmplr_libpath = find_cmplr(verbose=True)
+_, _omp_libpath = find_omp(verbose=True)
 
 if IS_LIN:
-    _cmplr_libpath = [os.path.join(_cmplr_root, 'linux', 'lib')]
-    _omp_libpath = [os.path.join(_cmplr_root, 'linux', 'compiler', 'lib', 'intel64')]
     _cmplr_rpath = _cmplr_libpath
     _omp_rpath = _omp_libpath
-elif IS_WIN:
-    _cmplr_libpath = [os.path.join(_cmplr_root, 'windows', 'lib')]
-    _omp_libpath = [os.path.join(_cmplr_root, 'windows', 'compiler', 'lib', 'intel64_win')]
 
 
 """

utils/dpnp_build_utils.py

@@ -26,6 +26,7 @@
 # *****************************************************************************
 
 import os
+import sys
 
 
 IS_CONDA_BUILD = os.environ.get("CONDA_BUILD") == "1"
@@ -76,6 +77,57 @@ def find_library(var_name, rel_header_paths, rel_lib_paths,
     return [include_find], [libpath_find]
 
 
+def _find_cmplr_in_dpcpp_root(verbose=False):
+    """
+    Find compiler in dpcpp root using $DPCPPROOT.
+
+    Parameters
+    ----------
+    verbose : bool
+        to print paths to include and library directories
+
+    Returns
+    -------
+    tuple(list(str), list(str))
+        path to include directory, path to library directory
+    """
+    rel_header_paths = rel_lib_paths = []
+
+    if 'linux' in sys.platform:
+        rel_include_path = os.path.join('linux', 'include')
+        rel_libdir_path = os.path.join('linux', 'lib')
+    elif sys.platform in ['win32', 'cygwin']:
+        rel_include_path = os.path.join('windows', 'include')
+        rel_libdir_path = os.path.join('windows', 'lib')
+    else:
+        rel_include_path, rel_libdir_path = 'include', 'lib'
+
+    return find_library("DPCPPROOT", rel_header_paths, rel_lib_paths,
+                        rel_include_path=rel_include_path, rel_libdir_path=rel_libdir_path, verbose=verbose)
+
+
+def find_cmplr(verbose=False):
+    """
+    Find compiler in environment.
+
+    Parameters
+    ----------
+    verbose : bool
+        to print paths to include and library directories
+
+    Returns
+    -------
+    tuple(list(str), list(str))
+        path to include directory, path to library directory
+    """
+    cmplr_include, cmplr_libpath = _find_cmplr_in_dpcpp_root(verbose=verbose)
+
+    if not cmplr_include or not cmplr_libpath:
+        raise EnvironmentError(f"Intel DPNP: Unable to find compiler. Please install Intel OneAPI environment")
+
+    return cmplr_include, cmplr_libpath
+
+
 def _find_mathlib_in_conda_root(verbose=False):
     """
     Find mathlib in conda root using $CONDA_PREFIX or $PREFIX.
@@ -142,3 +194,54 @@ def find_mathlib(verbose=False):
         raise EnvironmentError("Intel DPNP: Unable to find math library")
 
     return mathlib_include, mathlib_path
+
+
+def _find_omp_in_dpcpp_root(verbose=False):
+    """
+    Find omp in dpcpp root using $DPCPPROOT.
+
+    Parameters
+    ----------
+    verbose : bool
+        to print paths to include and library directories
+
+    Returns
+    -------
+    tuple(list(str), list(str))
+        path to include directory, path to library directory
+    """
+    rel_header_paths = rel_lib_paths = []
+
+    if 'linux' in sys.platform:
+        rel_include_path = os.path.join('linux', 'compiler', 'include')
+        rel_libdir_path = os.path.join('linux', 'compiler', 'lib', 'intel64')
+    elif sys.platform in ['win32', 'cygwin']:
+        rel_include_path = os.path.join('windows', 'compiler', 'include')
+        rel_libdir_path = os.path.join('windows', 'compiler', 'lib', 'intel64_win')
+    else:
+        rel_include_path, rel_libdir_path = 'include', 'lib'
+
+    return find_library("DPCPPROOT", rel_header_paths, rel_lib_paths,
+                        rel_include_path=rel_include_path, rel_libdir_path=rel_libdir_path, verbose=verbose)
+
+
+def find_omp(verbose=False):
+    """
+    Find omp in environment.
+
+    Parameters
+    ----------
+    verbose : bool
+        to print paths to include and library directories
+
+    Returns
+    -------
+    tuple(list(str), list(str))
+        path to include directory, path to library directory
+    """
+    omp_include, omp_libpath = _find_omp_in_dpcpp_root(verbose=verbose)
+
+    if not omp_include or not omp_libpath:
+        raise EnvironmentError(f"Intel DPNP: Unable to find omp. Please install Intel OneAPI environment")
+
+    return omp_include, omp_libpath