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 $1"
  10  AC_TRY_LINK([#include <stdio.h>],
  11  [printf("Hello, World!\n");],
  12  AC_MSG_RESULT([yes])
  13  CFLAGS="$pa_add_cflags__old_cflags ifelse([$2],[],[$1],[$2])",
  14  AC_MSG_RESULT([no])
  15  CFLAGS="$pa_add_cflags__old_cflags")])
  16
  17 dnl --------------------------------------------------------------------------
  18 dnl PA_HAVE_FUNC
  19 dnl
  20 dnl Look for a function with the specified arguments which could be
  21 dnl a builtin/intrinsic function.
  22 dnl --------------------------------------------------------------------------
  23 AC_DEFUN(PA_HAVE_FUNC,
  24 [AC_MSG_CHECKING([for $1])
  25 AC_TRY_LINK([], [(void)$1$2;],
  26 AC_MSG_RESULT([yes])
  27 AC_DEFINE(m4_toupper([HAVE_$1]), [1],
  28   [Define to 1 if you have the `$1' intrinsic function.]),
  29 AC_MSG_RESULT([no]))])
  30
  31 dnl --------------------------------------------------------------------------
  32 dnl PA_REPLACE_FUNC
  33 dnl
  34 dnl Look for a function and possible alternatives, unlike AC_REPLACE_FUNCS
  35 dnl this will only add *one* replacement to LIBOBJS if no alternative is
  36 dnl found.
  37 dnl --------------------------------------------------------------------------
  38 AC_DEFUN(PA_REPLACE_FUNC_WITH,
  39 [pa_replace_func__$2_missing=true
  40 AC_CHECK_FUNCS([$1], [pa_replace_func__$2_missing=false], [])
  41 if $pa_replace_func__$2_missing; then
  42   AC_LIBOBJ([$2])
  43 fi])
  44
  45 AC_DEFUN(PA_REPLACE_FUNC,
  46 [PA_REPLACE_FUNC_WITH([$1], m4_car(m4_unquote(m4_split(m4_normalize[$1]))))])