On Windows/mingw32, scanf only accepts %I64d for long long integers.

Reference that gave me this hint: http://acm.pku.edu.cn/JudgeOnline/faq.htm

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@14806 57a11ea4-9604-0410-9ed3-97b8803252fd

configure.in

@@ -135,7 +135,10 @@ if test x$am_cv_scanf_lld = "xno"; then
   SCANF_QD_CHECK
 
   if test x$am_cv_scanf_qd = "xno"; then
-    AC_MSG_ERROR([cannot continue, no long long conversion support in scanf])
+    SCANF_I64D_CHECK
+    if test x$am_cv_scanf_i64d = "xno"; then
+      AC_MSG_ERROR([Cannot continue, no long long conversion support in scanf.])
+    fi
   fi
 fi
 

lib/libqof/qof/qofutil.h

@@ -48,7 +48,11 @@
 # if HAVE_SCANF_QD
 #  define QOF_SCANF_LLD "%qd"
 # else
-#  error "No scanf format string is known for LLD. Fix your ./configure so that the correct one is detected!"
+#  if HAVE_SCANF_I64D
+#   define QOF_SCANF_LLD "%I64d"
+#  else
+#   error "No scanf format string is known for LLD. Fix your ./configure so that the correct one is detected!"
+#  endif
 # endif
 #endif
 

macros/legacy_macros.m4

@@ -153,6 +153,36 @@ int main ()
   fi
 ])
 
+AC_DEFUN([SCANF_I64D_CHECK],
+[
+  AC_CACHE_CHECK([if scanf supports %I64d conversions],
+                 am_cv_scanf_i64d,
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <stdlib.h>
+
+int main ()
+{
+  long long int d;
+  long long int e;
+
+  d = 0;
+  e =  100000;
+  e *= 100000;
+  if ((sscanf ("10000000000", "%I64d", &d) != 1) || (d != e))
+    exit (1);
+
+  exit (0);
+}
+],
+        am_cv_scanf_i64d=yes,
+        am_cv_scanf_i64d=no))
+  if test $am_cv_scanf_i64d = yes; then
+    AC_DEFINE(HAVE_SCANF_I64D, 1,
+      [Define if scanf supports %I64d conversions.])
+  fi
+])
+
 AC_DEFUN([LANGINFO_D_FMT_CHECK],
 [
   AC_CACHE_CHECK([for nl_langinfo and D_FMT], am_cv_langinfo_dfmt,