AM_PROG_LEX
AC_PROG_YACC
-dnl Check for data types which are needed by the hash function
-dnl (golden_ratio_hash).
-AC_CHECK_SIZEOF(int)
-AC_CHECK_SIZEOF(long)
-AC_CHECK_SIZEOF(long long)
-AC_CHECK_SIZEOF(void *)
dnl Switch to C++ language mode for the following libraries and headers.
AC_LANG([C++])
dnl Make sure all the necessary standard headers are installed on the system.
GINAC_STD_CXX_HEADERS
+dnl Check for data types which are needed by the hash function
+dnl (golden_ratio_hash).
+AC_CHECK_TYPE(long long)
+
dnl Check for stuff needed for building the GiNaC interactive shell (ginsh).
AC_CHECK_HEADERS(unistd.h)
GINAC_HAVE_RUSAGE