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## ---------------------------------------------------------------------
##
## Copyright (C) 2012 - 2017 by the deal.II authors
##
## This file is part of the deal.II library.
##
## The deal.II library is free software; you can use it, redistribute
## it, and/or modify it under the terms of the GNU Lesser General
## Public License as published by the Free Software Foundation; either
## version 2.1 of the License, or (at your option) any later version.
## The full text of the license can be found in the file LICENSE at
## the top level of the deal.II distribution.
##
## ---------------------------------------------------------------------
#
# General setup for the Intel C++ Compiler
#
# Please read the fat note in setup_compiler_flags.cmake prior to
# editing this file.
#
IF(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "15.0" )
MESSAGE(WARNING "\n"
"You're using an old version of the Intel C++ Compiler (icc/icpc)!\n"
"It is strongly recommended to use at least version 15.\n"
)
ENDIF()
########################
# #
# General setup: #
# #
########################
#
# Set the pic flag.
#
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-fpic")
#
# Check whether the -as-needed flag is available. If so set it to link
# the deal.II library with it.
#
ENABLE_IF_LINKS(DEAL_II_LINKER_FLAGS "-Wl,--as-needed")
#
# Set ansi mode:
#
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-ansi")
#
# Enable verbose warnings:
#
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-w2")
#
# Disable remarks like "Inlining inhibited by limit max-size"
#
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-diag-disable=remark")
#
# Disable some warnings that lead to a lot of false positives:
#
# -w21 type qualifiers are meaningless in this declaration
# -w68 integer conversion resulted in a change of sign
# (triggers a lot in functionparser)
# -w175 subscript out of range
# -w135 class template "dealii::FE_Q_Base<POLY, dim, spacedim>"
# has no member "Implementation"
# (the compiler is objectively wrong since the warning
# triggers also on code of the form
# class FE_Q_Base {
# struct Implementation; // forward declaration
# friend struct Implementation;
# };)
# -w177 declared but not referenced
# -w191 type qualifier is meaningless on cast type
# Warnings from this warn about code like this:
# static_cast<T const * const>(p)
# There are many places in boost that do this kind of stuff
# -w193 zero used for undefined preprocessing identifier "..."
# This happens when using undefined preprocessor names in
# conditions such as
# #if (abc && def)
# instead of
# #if (defined(abc) && defined(def))
# The standard says that in such cases, the undefined symbol
# is assumed to be zero. The warning is in principle
# useful, but the pattern appears exceedingly often in the TBB
# -w279 controlling expression is constant
# -w327 NULL reference is not allowed
# (the compiler is correct here in that statements like
# *static_cast<int*>(0) are not allowed to initialize
# references; however, it's the only useful way to do
# so if you need an invalid value for a reference)
# -w383 value copied to temporary, reference to temporary used
# -w981 operands are evaluated in unspecified order
# -w1418 external function definition with no prior declaration
# (happens in boost)
# -w1478 deprecation warning
# -w1572 floating-point equality and inequality comparisons are unreliable
# -w2259 non-pointer conversion from "double" to "float" may
# lose significant bits
# -w2536 type qualifiers are meaningless here
# -w3415 the "always_inline" attribute is ignored on non-inline functions
# incorrectly triggered by inline functions in tensor.h
# -w15531 A portion of SIMD loop is serialized
#
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd21")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd68")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd135")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd175")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd177")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd191")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd193")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd279")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd327")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd383")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd981")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd1418")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd1478")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd1572")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd2259")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd2536")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd3415")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd15531")
#
# Also disable the following warnings that we frequently
# trigger writing dimension independent code:
# -w111 statement is unreachable
# Happens in code that is guarded by a check on 'dim'
# -w128 loop is not reachable from preceding
# Same as above
# -w185 dynamic initialization in unreachable code
# When initializing a local variable in code
# that is executed only for one specific dimension
# -w186 pointless comparison of unsigned integer with zero
# The condition of for loops often depends on dim
# and happens to evaluate to zero sometimes
# -w280 selector expression is constant
# When writing 'switch(dim)'
#
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd111")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd128")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd185")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd186")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-wd280")
IF(DEAL_II_STATIC_EXECUTABLE)
#
# To produce a static executable, we have to statically link intel's
# support libraries:
#
ENABLE_IF_SUPPORTED(DEAL_II_LINKER_FLAGS "-static")
ENABLE_IF_SUPPORTED(DEAL_II_LINKER_FLAGS "-static-intel")
ENABLE_IF_SUPPORTED(DEAL_II_LINKER_FLAGS "-static-gcc")
ENABLE_IF_SUPPORTED(DEAL_II_LINKER_FLAGS "-pthread")
ELSE()
#
# Explicitly link intel support libraries dynamically:
#
ENABLE_IF_SUPPORTED(DEAL_II_LINKER_FLAGS "-shared-intel")
ENDIF()
#############################
# #
# For Release target: #
# #
#############################
IF (CMAKE_BUILD_TYPE MATCHES "Release")
#
# General optimization flags:
#
ADD_FLAGS(DEAL_II_CXX_FLAGS_RELEASE "-O2")
# equivalent to -fno-strict-aliasing:
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS_RELEASE "-no-ansi-alias")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS_RELEASE "-ip")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS_RELEASE "-funroll-loops")
ENDIF()
###########################
# #
# For Debug target: #
# #
###########################
IF (CMAKE_BUILD_TYPE MATCHES "Debug")
LIST(APPEND DEAL_II_DEFINITIONS_DEBUG "DEBUG")
LIST(APPEND DEAL_II_USER_DEFINITIONS_DEBUG "DEBUG")
ADD_FLAGS(DEAL_II_CXX_FLAGS_DEBUG "-O0")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS_DEBUG "-g")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS_DEBUG "-gdwarf-2")
ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS_DEBUG "-grecord-gcc-switches")
ENDIF()
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