m4/float_h.m4

   1 # float_h.m4 serial 7
   2 dnl Copyright (C) 2007, 2009-2011 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 AC_DEFUN([gl_FLOAT_H],
   8 [
   9   AC_REQUIRE([AC_PROG_CC])
  10   AC_REQUIRE([AC_CANONICAL_HOST])
  11   FLOAT_H=
  12   REPLACE_FLOAT_LDBL=0
  13   case "$host_os" in
  14     aix* | beos* | openbsd* | mirbsd* | irix*)
  15       FLOAT_H=float.h
  16       ;;
  17     freebsd*)
  18       case "$host_cpu" in
  19 changequote(,)dnl
  20         i[34567]86 )
  21 changequote([,])dnl
  22           FLOAT_H=float.h
  23           ;;
  24         x86_64 )
  25           # On x86_64 systems, the C compiler may still be generating
  26           # 32-bit code.
  27           AC_EGREP_CPP([yes],
  28             [#if defined __LP64__ || defined __x86_64__ || defined __amd64__
  29              yes
  30              #endif],
  31             [],
  32             [FLOAT_H=float.h])
  33           ;;
  34       esac
  35       ;;
  36   esac
  37   case "$host_os" in
  38     aix* | freebsd*)
  39       if test -n "$FLOAT_H"; then
  40         REPLACE_FLOAT_LDBL=1
  41       fi
  42       ;;
  43   esac
  44   if test -n "$FLOAT_H"; then
  45     gl_NEXT_HEADERS([float.h])
  46   fi
  47   AC_SUBST([FLOAT_H])
  48   AM_CONDITIONAL([GL_GENERATE_FLOAT_H], [test -n "$FLOAT_H"])
  49 ])