dnl @synopsis AC_CXX_STRING_COMPARE_STRING_FIRST
dnl
dnl If the standard library string::compare() function takes the
dnl string as its first argument, define FUNC_STRING_COMPARE_STRING_FIRST to 1.
dnl
dnl @author Steven Robbins
dnl
AC_DEFUN([AC_CXX_STRING_COMPARE_STRING_FIRST], [
	AC_CACHE_CHECK(whether std::string::compare takes a string in argument 1,
	ac_cv_cxx_string_compare_string_first,
	[
		AC_REQUIRE([AC_CXX_NAMESPACES])
		AC_LANG_SAVE
		AC_LANG_CPLUSPLUS
		AC_TRY_COMPILE([
#include <string>
#ifdef HAVE_NAMESPACES
using namespace std;
#endif
		], [
string x("hi"); string y("h");
return x.compare(y,0,1) == 0;
		],
		ac_cv_cxx_string_compare_string_first=yes, 
		ac_cv_cxx_string_compare_string_first=no)
		AC_LANG_RESTORE
	])
	AS_IF([test "x$ac_cv_cxx_string_compare_string_first" = "xyes"], [
		AC_DEFINE(FUNC_STRING_COMPARE_STRING_FIRST,1,
			[define if library uses std::string::compare(string,pos,n)])
	])
])