aclocal.m4

   1 dnl --------------------------------------------------------------------------
   2 dnl PA_ADD_CFLAGS()
   3 dnl
   4 dnl Attempt to add the given option to CFLAGS, if it doesn't break compilation
   5 dnl --------------------------------------------------------------------------
   6 AC_DEFUN(PA_ADD_CFLAGS,
   7 [AC_MSG_CHECKING([if $CC accepts $1])
   8  pa_add_cflags__old_cflags="$CFLAGS"
   9  CFLAGS="$CFLAGS $1"
  10  AC_TRY_LINK([#include <stdio.h>],
  11  [printf("Hello, World!\n");],
  12  AC_MSG_RESULT([yes]),
  13  AC_MSG_RESULT([no])
  14  CFLAGS="$pa_add_cflags__old_cflags")])
  15
  16 dnl --------------------------------------------------------------------------
  17 dnl PA_HAVE_FUNC
  18 dnl
  19 dnl Look for a function with the specified arguments which could be
  20 dnl a builtin/intrinsic function.
  21 dnl --------------------------------------------------------------------------
  22 AC_DEFUN(PA_HAVE_FUNC,
  23 [AC_MSG_CHECKING([for $1])
  24 AC_TRY_LINK([], [(void)$1$2;],
  25 AC_MSG_RESULT([yes])
  26 AC_DEFINE(m4_toupper([HAVE_$1]), [1],
  27   [Define to 1 if you have the `$1' intrinsic function.]),
  28 AC_MSG_RESULT([no]))])
  29
  30 dnl --------------------------------------------------------------------------
  31 dnl PA_REPLACE_FUNC
  32 dnl
  33 dnl Look for a function and possible alternatives, unlike AC_REPLACE_FUNCS
  34 dnl this will only add *one* replacement to LIBOBJS if no alternative is
  35 dnl found.
  36 dnl --------------------------------------------------------------------------
  37 AC_DEFUN(PA_REPLACE_FUNC_WITH,
  38 [pa_replace_func__$2_missing=true
  39 AC_CHECK_FUNCS([$1], [pa_replace_func__$2_missing=false], [])
  40 if $pa_replace_func__$2_missing; then
  41   AC_LIBOBJ([$2])
  42 fi])
  43
  44 AC_DEFUN(PA_REPLACE_FUNC,
  45 [PA_REPLACE_FUNC_WITH([$1], m4_car(m4_unquote(m4_split(m4_normalize[$1]))))])