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Features: Add special case to disable relaxed constexpr for Intel 18

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Intel compilers define `__cpp_constexpr` to `200704` even in C++14 mode.
This indicates that the `cxx_relaxed_constexpr` feature is not
available.  However, Intel 17 and above document support for it.  In
commit v3.8.0~9^2 (Features: Update features for Intel C++ 17.0.2 on
UNIX, 2017-03-31) we added a special check for this case.  Intel 17 and
19 work.  However, Intel 18 does not seem to work and fails our test
case.  Add a special case to disable the feature for Intel 18.
This commit is contained in:
Brad King
2018-06-04 13:47:04 -04:00
parent 07bddeae14
commit f719a13c28
1 changed files with 1 additions and 1 deletions
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Modules/Compiler/Intel-CXX-FeatureTests.cmake
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@@ -24,7 +24,7 @@ set(DETECT_CXX14 "((__cplusplus >= 201300L) || ((__cplusplus == 201103L) && !def
unset(DETECT_BUGGY_ICC15)
set(Intel17_CXX14 "__INTEL_COMPILER >= 1700 && ${DETECT_CXX14}")
set(_cmake_feature_test_cxx_relaxed_constexpr "__cpp_constexpr >= 201304 || (${Intel17_CXX14} && !defined(_MSC_VER))")
set(_cmake_feature_test_cxx_relaxed_constexpr "__cpp_constexpr >= 201304 || (${Intel17_CXX14} && __INTEL_COMPILER != 1800 && !defined(_MSC_VER))")
set(Intel16_CXX14 "__INTEL_COMPILER >= 1600 && ${DETECT_CXX14}")
set(_cmake_feature_test_cxx_aggregate_default_initializers "${Intel16_CXX14}")