check-decl.m4

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Author : Jim Meyering
Date : 1999-01-10 22:45:03
Hash : a4635752
Message : Use 3-arg form of AC_DEFINE instead of the AC_CHECK_FUNCS hack. Now, it's still a hack, but at least the comments in config.h.in are meaningful.

m4/check-decl.m4

#serial 5

dnl This is just a wrapper function to encapsulate this kludge.
dnl Putting it in a separate file like this helps share it between
dnl different packages.
AC_DEFUN(jm_CHECK_DECLS,
[
  headers='
#include <stdio.h>
#ifdef HAVE_STRING_H
# if !STDC_HEADERS && HAVE_MEMORY_H
#  include <memory.h>
# endif
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
#  include <strings.h>
# endif
#endif
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
'

  if test x = y; then
    dnl This code is deliberately never run via ./configure.
    dnl FIXME: this is a gross hack to make autoheader put entries
    dnl for each of these symbols in the config.h.in.
    dnl Otherwise, I'd have to update acconfig.h every time I change
    dnl this list of functions.
    AC_DEFINE(HAVE_DECL_FREE, 1, [Define if this function is declared.])
    AC_DEFINE(HAVE_DECL_LSEEK, 1, [Define if this function is declared.])
    AC_DEFINE(HAVE_DECL_MALLOC, 1, [Define if this function is declared.])
    AC_DEFINE(HAVE_DECL_MEMCHR, 1, [Define if this function is declared.])
    AC_DEFINE(HAVE_DECL_REALLOC, 1, [Define if this function is declared.])
    AC_DEFINE(HAVE_DECL_STPCPY, 1, [Define if this function is declared.])
    AC_DEFINE(HAVE_DECL_STRSTR, 1, [Define if this function is declared.])
  fi

  jm_CHECK_DECLARATIONS($headers, free lseek malloc \
                        memchr realloc stpcpy strstr)
])

kc3-lang/gnulib/m4/check-decl.m4

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