Source code for spack.compilers.nag

# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
# SPDX-License-Identifier: (Apache-2.0 OR MIT)

import os
from typing import List  # novm

import spack.compiler

[docs]class Nag(spack.compiler.Compiler): # Subclasses use possible names of C compiler cc_names = [] # type: List[str] # Subclasses use possible names of C++ compiler cxx_names = [] # type: List[str] # Subclasses use possible names of Fortran 77 compiler f77_names = ['nagfor'] # Subclasses use possible names of Fortran 90 compiler fc_names = ['nagfor'] # Named wrapper links within build_env_path # Use default wrappers for C and C++, in case provided in compilers.yaml link_paths = { 'cc': 'cc', 'cxx': 'c++', 'f77': os.path.join('nag', 'nagfor'), 'fc': os.path.join('nag', 'nagfor')} version_argument = '-V' version_regex = r'NAG Fortran Compiler Release ([0-9.]+)' @property def verbose_flag(self): # NAG does not support a flag that would enable verbose output and # compilation/linking at the same time (with either '-#' or '-dryrun' # the compiler only prints the commands but does not run them). # Therefore, the only thing we can do is to pass the '-v' argument to # the underlying GCC. In order to get verbose output from the latter # at both compile and linking stages, we need to call NAG with two # additional flags: '-Wc,-v' and '-Wl,-v'. However, we return only # '-Wl,-v' for the following reasons: # 1) the interface of this method does not support multiple flags in # the return value and, at least currently, verbose output at the # linking stage has a higher priority for us; # 2) NAG is usually mixed with GCC compiler, which also accepts # '-Wl,-v' and produces meaningful result with it: '-v' is passed # to the linker and the latter produces verbose output for the # linking stage ('-Wc,-v', however, would break the compilation # with a message from GCC that the flag is not recognized). # # This way, we at least enable the implicit rpath detection, which is # based on compilation of a C file (see method # spack.compiler._get_compiler_link_paths): in the case of a mixed # NAG/GCC toolchain, the flag will be passed to g++ (e.g. # 'g++ -Wl,-v ./main.c'), otherwise, the flag will be passed to nagfor # (e.g. 'nagfor -Wl,-v ./main.c' - note that nagfor recognizes '.c' # extension and treats the file accordingly). The list of detected # rpaths will contain only GCC-related directories and rpaths to # NAG-related directories are injected by nagfor anyway. return "-Wl,-v" @property def openmp_flag(self): return "-openmp" @property def debug_flags(self): return ['-g', '-gline', '-g90'] @property def opt_flags(self): return ['-O', '-O0', '-O1', '-O2', '-O3', '-O4'] @property def cxx11_flag(self): # NAG does not have a C++ compiler # However, it can be mixed with a compiler that does support it return "-std=c++11" @property def f77_pic_flag(self): return "-PIC" @property def fc_pic_flag(self): return "-PIC" # Unlike other compilers, the NAG compiler passes options to GCC, which # then passes them to the linker. Therefore, we need to doubly wrap the # options with '-Wl,-Wl,,' @property def f77_rpath_arg(self): return '-Wl,-Wl,,-rpath,,' @property def fc_rpath_arg(self): return '-Wl,-Wl,,-rpath,,' @property def linker_arg(self): return '-Wl,-Wl,,' @property def disable_new_dtags(self): # Disable RPATH/RUNPATH forcing for NAG/GCC mixed toolchains: return '' @property def enable_new_dtags(self): # Disable RPATH/RUNPATH forcing for NAG/GCC mixed toolchains: return ''