Import Upstream version 2.72.4

glib/gnulib/gl_cv_long_double_equals_double/meson.build

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+# Copyright (C) 2002-2004, 2006-2018 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# gl_LONG_DOUBLE_VS_DOUBLE
+# determines whether 'long double' and 'double' have the same representation.
+# The currently known platforms where this is the case are:
+# Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9.
+
+long_double_eq_double_test = '''
+#include <float.h>
+int main ()
+{
+  typedef int check[sizeof (long double) == sizeof (double)
+                    && LDBL_MANT_DIG == DBL_MANT_DIG
+                    && LDBL_MAX_EXP == DBL_MAX_EXP
+                    && LDBL_MIN_EXP == DBL_MIN_EXP
+                    ? 1 : -1];
+  return check;
+}
+'''
+
+gl_cv_long_double_equals_double = cc.compiles(long_double_eq_double_test)