+++ /dev/null
---- /dev/null
-+++ b/acinclude.m4
-@@ -0,0 +1,109 @@
-+dnl ##
-+dnl ## Check for C99 va_copy() implementation
-+dnl ## (and provide fallback implementation if neccessary)
-+dnl ##
-+dnl ## configure.in:
-+dnl ## AC_CHECK_VA_COPY
-+dnl ## foo.c:
-+dnl ## #include "config.h"
-+dnl ## [...]
-+dnl ## va_copy(d,s)
-+dnl ##
-+dnl ## This check is rather complex: first because we really have to
-+dnl ## try various possible implementations in sequence and second, we
-+dnl ## cannot define a macro in config.h with parameters directly.
-+dnl ##
-+
-+dnl # test program for va_copy() implementation
-+changequote(<<,>>)
-+m4_define(__va_copy_test, <<[
-+#include <stdlib.h>
-+#include <stdarg.h>
-+#include <string.h>
-+#define DO_VA_COPY(d, s) $1
-+void test(char *str, ...)
-+{
-+ va_list ap, ap2;
-+ int i;
-+ va_start(ap, str);
-+ DO_VA_COPY(ap2, ap);
-+ for (i = 1; i <= 9; i++) {
-+ int k = (int)va_arg(ap, int);
-+ if (k != i)
-+ abort();
-+ }
-+ DO_VA_COPY(ap, ap2);
-+ for (i = 1; i <= 9; i++) {
-+ int k = (int)va_arg(ap, int);
-+ if (k != i)
-+ abort();
-+ }
-+ va_end(ap);
-+}
-+int main(int argc, char *argv[])
-+{
-+ test("test", 1, 2, 3, 4, 5, 6, 7, 8, 9);
-+ exit(0);
-+}
-+]>>)
-+changequote([,])
-+
-+dnl # test driver for va_copy() implementation
-+m4_define(__va_copy_check, [
-+ AH_VERBATIM($1,
-+[/* Predefined possible va_copy() implementation (id: $1) */
-+#define __VA_COPY_USE_$1(d, s) $2])
-+ if test ".$ac_cv_va_copy" = .; then
-+ AC_TRY_RUN(__va_copy_test($2), [ac_cv_va_copy="$1"])
-+ fi
-+])
-+
-+dnl # Autoconf check for va_copy() implementation checking
-+AC_DEFUN(AC_CHECK_VA_COPY,[
-+ dnl # provide Autoconf display check message
-+ AC_MSG_CHECKING(for va_copy() function)
-+ dnl # check for various implementations in priorized sequence
-+ AC_CACHE_VAL(ac_cv_va_copy, [
-+ ac_cv_va_copy=""
-+ dnl # 1. check for standardized C99 macro
-+ __va_copy_check(C99, [va_copy((d), (s))])
-+ dnl # 2. check for alternative/deprecated GCC macro
-+ __va_copy_check(GCM, [VA_COPY((d), (s))])
-+ dnl # 3. check for internal GCC macro (high-level define)
-+ __va_copy_check(GCH, [__va_copy((d), (s))])
-+ dnl # 4. check for internal GCC macro (built-in function)
-+ __va_copy_check(GCB, [__builtin_va_copy((d), (s))])
-+ dnl # 5. check for assignment approach (assuming va_list is a struct)
-+ __va_copy_check(ASS, [do { (d) = (s); } while (0)])
-+ dnl # 6. check for assignment approach (assuming va_list is a pointer)
-+ __va_copy_check(ASP, [do { *(d) = *(s); } while (0)])
-+ dnl # 7. check for memory copying approach (assuming va_list is a struct)
-+ __va_copy_check(CPS, [memcpy((void *)&(d), (void *)&(s)), sizeof((s))])
-+ dnl # 8. check for memory copying approach (assuming va_list is a pointer)
-+ __va_copy_check(CPP, [memcpy((void *)(d), (void *)(s)), sizeof(*(s))])
-+ if test ".$ac_cv_va_copy" = .; then
-+ AC_ERROR([no working implementation found])
-+ fi
-+ ])
-+ dnl # optionally activate the fallback implementation
-+ if test ".$ac_cv_va_copy" = ".C99"; then
-+ AC_DEFINE(HAVE_VA_COPY, 1, [Define if va_copy() macro exists (and no fallback implementation is required)])
-+ fi
-+ dnl # declare which fallback implementation to actually use
-+ AC_DEFINE_UNQUOTED([__VA_COPY_USE], [__VA_COPY_USE_$ac_cv_va_copy],
-+ [Define to id of used va_copy() implementation])
-+ dnl # provide activation hook for fallback implementation
-+ AH_VERBATIM([__VA_COPY_ACTIVATION],
-+[/* Optional va_copy() implementation activation */
-+#ifndef HAVE_VA_COPY
-+#define va_copy(d, s) __VA_COPY_USE(d, s)
-+#endif
-+])
-+ dnl # provide Autoconf display result message
-+ if test ".$ac_cv_va_copy" = ".C99"; then
-+ AC_MSG_RESULT([yes])
-+ else
-+ AC_MSG_RESULT([no (using fallback implementation)])
-+ fi
-+])
-+