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2532fa21a9
- This currently just moves over all of the behavior from LLVM. Eventually all of the configure checks that are directly needed by the LLVM build setup should probably go away, and the project should manage their own configuration checks if necessary. - This is the 1st half of this work, the actual Makefile.common hasn't moved over yet. I've tried to stage this in such a way that incremental builds will properly reconfigure for most active developers (the Makefiles don't handle reconfiguring in a perfectly reliable way, and I haven't found an easy way to make them do so). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142456 91177308-0d34-0410-b5e6-96231b3b80d8
28 lines
986 B
Plaintext
28 lines
986 B
Plaintext
#
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# This function determines if the isnan function is available on this
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# platform.
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#
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AC_DEFUN([AC_FUNC_ISNAN],[
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AC_SINGLE_CXX_CHECK([ac_cv_func_isnan_in_math_h],
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[isnan], [<math.h>],
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[float f; isnan(f);])
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if test "$ac_cv_func_isnan_in_math_h" = "yes" ; then
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AC_DEFINE([HAVE_ISNAN_IN_MATH_H],1,[Set to 1 if the isnan function is found in <math.h>])
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fi
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AC_SINGLE_CXX_CHECK([ac_cv_func_isnan_in_cmath],
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[isnan], [<cmath>],
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[float f; isnan(f);])
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if test "$ac_cv_func_isnan_in_cmath" = "yes" ; then
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AC_DEFINE([HAVE_ISNAN_IN_CMATH],1,[Set to 1 if the isnan function is found in <cmath>])
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fi
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AC_SINGLE_CXX_CHECK([ac_cv_func_std_isnan_in_cmath],
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[std::isnan], [<cmath>],
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[float f; std::isnan(f);])
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if test "$ac_cv_func_std_isnan_in_cmath" = "yes" ; then
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AC_DEFINE([HAVE_STD_ISNAN_IN_CMATH],1,[Set to 1 if the std::isnan function is found in <cmath>])
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fi
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])
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