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# Copyright © 2005 Scott James Remnant <scott@netsplit.com>
# Copyright © 2008, 2009 Guillem Jover <guillem@debian.org>
# DPKG_FUNC_VA_COPY
# -----------------
# Define HAVE_VA_COPY if we have va_copy, fail if they can't be assigned
AC_DEFUN([DPKG_FUNC_VA_COPY],
[AC_CACHE_CHECK([for va_copy], [dpkg_cv_va_copy],
[AC_RUN_IFELSE([AC_LANG_SOURCE(
[[#include <stdarg.h>
int main()
{
va_list v1, v2;
va_copy (v1, v2);
exit (0);
}
]])],
[dpkg_cv_va_copy=yes],
[dpkg_cv_va_copy=no],
[dpkg_cv_va_copy=no])])
AS_IF([test "x$dpkg_cv_va_copy" = "xyes"],
[AC_DEFINE([HAVE_VA_COPY], 1,
[Define to 1 if the 'va_copy' macro exists])])
])# DPKG_FUNC_VA_COPY
# DPKG_FUNC_C99_SNPRINTF
# -----------------------
# Define HAVE_C99_SNPRINTF if we have C99 snprintf family semantics
AC_DEFUN([DPKG_FUNC_C99_SNPRINTF],
[AC_CACHE_CHECK([for C99 snprintf functions], [dpkg_cv_c99_snprintf],
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
int test_vsnprintf(const char *fmt, ...)
{
int n;
va_list args;
va_start(args, fmt);
n = vsnprintf(NULL, 0, fmt, args);
va_end(args);
return n;
}
int main()
{
int n;
n = snprintf(NULL, 0, "format %s %d", "string", 10);
if (n != strlen("format string 10"))
return 1;
n = test_vsnprintf("format %s %d", "string", 10);
if (n != strlen("format string 10"))
return 1;
return 0;
}
]])],
[dpkg_cv_c99_snprintf=yes],
[dpkg_cv_c99_snprintf=no],
[dpkg_cv_c99_snprintf=no])])
AS_IF([test "x$dpkg_cv_c99_snprintf" = "xyes"],
[AC_DEFINE([HAVE_C99_SNPRINTF], 1,
[Define to 1 if the 'snprintf' family is C99 conformant])],
)
AM_CONDITIONAL(HAVE_C99_SNPRINTF, [test "x$dpkg_cv_c99_snprintf" = "xyes"])
])# DPKG_FUNC_C99_SNPRINTF
# DPKG_MMAP
# ---------
# Define USE_MMAP if mmap() is available and it was requested
AC_DEFUN([DPKG_MMAP],
[
AC_ARG_ENABLE([mmap],
AS_HELP_STRING([--enable-mmap],
[enable usage of unrealiable mmap if available]),
[],
[enable_mmap=no])
AS_IF([test "x$enable_mmap" = "xyes"], [
AC_CHECK_FUNCS([mmap])
AC_DEFINE(USE_MMAP, 1, [Use unreliable mmap support])
])
])
# DPKG_CHECK_PROGNAME
# -------------------
# Check for system implementations of program name tracking.
AC_DEFUN([DPKG_CHECK_PROGNAME],
[
AC_MSG_CHECKING([for program_invocation_short_name])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
[[const char *p = program_invocation_short_name;]])],
[AC_DEFINE([HAVE_PROGRAM_INVOCATION_SHORT_NAME], [1],
[Define to 1 if you have program_invocation_short_name])
AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])])
AC_MSG_CHECKING([for __progname])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
[[extern char *__progname;
const char *p = __progname;]])],
[AC_DEFINE([HAVE___PROGNAME], [1],
[Define to 1 if you have __progname])
AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])])
]) # DPKG_CHECK_PROGNAME
# DPKG_CHECK_COMPAT_FUNCS(LIST)
# -----------------------
# Check each function and define an automake conditional
AC_DEFUN([DPKG_CHECK_COMPAT_FUNCS],
[
AC_CHECK_FUNCS([$1])
m4_foreach_w([ac_func], [$1], [
AM_CONDITIONAL(HAVE_[]AS_TR_CPP(ac_func),
[test "x$ac_cv_func_[]AS_TR_SH(ac_func)" = "xyes"])
])
]) # DPKG_CHECK_COMPAT_FUNCS
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