18 lines
570 B
Plaintext
18 lines
570 B
Plaintext
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dnl Available from the GNU Autoconf Macro Archive at:
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dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_explicit.html
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dnl
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AC_DEFUN([AC_CXX_EXPLICIT],
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[AC_CACHE_CHECK(whether the compiler supports the explicit keyword,
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ac_cv_cxx_explicit,
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[AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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AC_TRY_COMPILE([class A{public:explicit A(double){}};],
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[double c = 5.0;A x(c);return 0;],
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ac_cv_cxx_explicit=yes, ac_cv_cxx_explicit=no)
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AC_LANG_RESTORE
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])
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if test "$ac_cv_cxx_explicit" = yes; then
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AC_DEFINE(HAVE_EXPLICIT,,[define if the compiler supports the explicit keyword])
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fi
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])
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