2018-11-19 22:40:53 +00:00
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dnl
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2020-09-30 15:19:32 +00:00
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dnl Check for the fmt library
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2018-11-19 22:40:53 +00:00
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dnl
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AC_CACHE_CHECK([fmt],[ac_cv_fmt],[
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AC_LANG_PUSH(C++)
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ac_save_CXXFLAGS="$CXXFLAGS"
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ac_save_LIBS="$LIBS"
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CXXFLAGS="$STD_CXX $CXXFLAGS"
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LIBS="$LIBS -lfmt"
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2022-11-04 17:56:35 +00:00
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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2018-11-19 22:40:53 +00:00
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#include <fmt/format.h>
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#include <fmt/ostream.h>
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2020-05-15 08:33:12 +00:00
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2024-04-23 21:01:53 +00:00
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#if !defined(FMT_VERSION) || (FMT_VERSION < 80000)
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#error fmtlib is too old, need 8.0.0 or later
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2020-05-15 08:33:12 +00:00
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#endif
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2022-11-04 17:56:35 +00:00
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]], [[
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2024-04-23 21:01:53 +00:00
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fmt::format("{0}", fmt::to_string(4254));
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std::string moo{"'{0}' says the cow"};
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fmt::format(fmt::runtime(moo), "moo");
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2022-11-04 17:56:35 +00:00
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]])],[ac_cv_fmt=yes],[ac_cv_fmt=no])
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2018-11-19 22:40:53 +00:00
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CXXFLAGS="$ac_save_CXXFLAGS"
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LIBS="$ac_save_LIBS"
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AC_LANG_POP
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])
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if test x"$ac_cv_fmt" = xyes; then
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FMT_INTERNAL=no
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else
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AC_MSG_NOTICE([Using the internal version of fmt])
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FMT_INTERNAL=yes
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fi
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AC_SUBST(FMT_INTERNAL)
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