17 lines
504 B
Plaintext
17 lines
504 B
Plaintext
AC_DEFUN([OB_CXX_HAVE_ISFINITE],
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[AC_CACHE_CHECK(whether the compiler supports isfinite macro,
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ac_cv_cxx_have_isfinite,
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[AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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AC_TRY_COMPILE([#define _GNU_SOURCE
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#include <cmath>],
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[double d=0; int n = isfinite(d);],
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ac_cv_cxx_have_isfinite=yes,
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ac_cv_cxx_have_isfinite=no)
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AC_LANG_RESTORE
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])
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if test $ac_cv_cxx_have_isfinite = yes; then
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AC_DEFINE(HAVE_ISFINITE,,[define if the macro isfinite exist])
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fi
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])
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