+dnl checks needed to define wxVaCopy
+AC_CACHE_CHECK([for va_copy],
+ wx_cv_func_va_copy,
+ [
+ AC_LINK_IFELSE([
+ #include <stdarg.h>
+ void foo(char *f, ...)
+ {
+ va_list ap1, ap2;
+ va_start(ap1, f);
+ va_copy(ap2, ap1);
+ va_end(ap2);
+ va_end(ap1);
+ }
+ int main()
+ {
+ return foo("hi", 17);
+ }],
+ wx_cv_func_va_copy=yes,
+ wx_cv_func_va_copy=no
+ )
+ ]
+)
+
+if test $wx_cv_func_va_copy = "yes"; then
+ AC_DEFINE(HAVE_VA_COPY)
+else
+ dnl try to understand how can we copy va_lists
+ AC_CACHE_CHECK([if va_list can be copied by value],
+ wx_cv_type_va_list_lvalue,
+ [
+ AC_RUN_IFELSE([
+ #include <stdarg.h>
+ int foo(char *f, ...)
+ {
+ va_list ap1, ap2;
+ va_start(ap1, f);
+ ap2 = ap1;
+ if ( va_arg(ap1, int) != 17 || va_arg(ap2, int) != 17 )
+ return 1;
+ va_end(ap2);
+ va_end(ap1);
+ return 0;
+ }
+ int main()
+ {
+ return foo("hi", 17);
+ }],
+ wx_cv_type_va_list_lvalue=yes,
+ wx_cv_type_va_list_lvalue=no,
+ dnl assume most common case for cross-compiling...
+ wx_cv_type_va_list_lvalue=yes
+ )
+ ]
+ )
+
+ if test $wx_cv_type_va_list_lvalue != "yes"; then
+ dnl we suppose that the only thing which can't be copied like this
+ dnl are arrays... only experience will show whether this is really true
+ AC_DEFINE(VA_LIST_IS_ARRAY)
+ fi
+fi
+
projects / wxWidgets.git / blobdiff