531114cd6c
* fmt: Add cxxstd variant, plus cmake/c++ patches Spack supported versions of fmt default to C++11 for versions less than 5, C++14 greater than 5, with fmt implementing fallbacks to whatever compiler supports. To give better ABI compatibility and use of newer standards, provide a `cxxstd` variant defaulting to 11 with 98-17 options. Use cmake_args to set CMAKE_CXX_STANDARD as appropriate, plus use of `FMT_USE_CPP11` option for C++98 builds. Use `conflicts` to disable use of certain standards in versions that don't support, or fail the build, with those standards. Add patches to unify use of `CMAKE_CXX_STANDARD` in 3.0 versions, remove hard-coding of compiler flags in `fmt-config.cmake`, and prevent use of C++11 features in 4.1.0 when in supported C++98 mode. Default to not building documents as no dependency on Doxygen is yet present, and they are not part of the "all" build. * Use CMake to enforce C++ standard support Fail configure step if fmt tries to build with a cxxstd variant not supported by the compiler (or known to CMake). * fmt: New version 5.3.0
14 lines
501 B
Diff
14 lines
501 B
Diff
diff --git a/fmt/format.h b/fmt/format.h
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index 561a9e0..9faf5ca 100644
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--- a/fmt/format.h
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+++ b/fmt/format.h
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@@ -153,7 +153,7 @@ typedef __int64 intmax_t;
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# define FMT_HAS_CPP_ATTRIBUTE(x) 0
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#endif
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-#if FMT_HAS_CPP_ATTRIBUTE(maybe_unused)
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+#if FMT_HAS_CPP_ATTRIBUTE(maybe_unused) && __cplusplus >= 201103L
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# define FMT_HAS_CXX17_ATTRIBUTE_MAYBE_UNUSED
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// VC++ 1910 support /std: option and that will set _MSVC_LANG macro
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// Clang with Microsoft CodeGen doesn't define _MSVC_LANG macro
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