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AC_CXX_HAVE_COMPLEX
If the compiler has complex<T>, define HAVE_COMPLEX.
1.2 (last modified: 2000-07-19)
Luc Maisonobe
AC_DEFUN([AC_CXX_HAVE_COMPLEX], [AC_CACHE_CHECK(whether the compiler has complex<T>, ac_cv_cxx_have_complex, [AC_REQUIRE([AC_CXX_NAMESPACES]) AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_TRY_COMPILE([#include <complex> #ifdef HAVE_NAMESPACES using namespace std; #endif],[complex<float> a; complex<double> b; return 0;], ac_cv_cxx_have_complex=yes, ac_cv_cxx_have_complex=no) AC_LANG_RESTORE ]) if test "$ac_cv_cxx_have_complex" = yes; then AC_DEFINE(HAVE_COMPLEX,,[define if the compiler has complex<T>]) fi ])