dnl Process this file with autoconf to produce a configure script.
AC_INIT(ginac/basic.cpp)
-AC_PREREQ(2.13)
+AC_PREREQ(2.50)
dnl GiNaC library version information.
dnl
LIBS=$save_LIBS
AC_SUBST(GINSH_LIBS)
-dnl Make sure all the necessary new-style headers are installed on the system.
-dnl If one of them cannot be found the system is probably not ANSI-conform
-dnl enough so trying the .h-style headers is a waste of time.
-AC_CHECK_HEADERS(iostream vector map string list typeinfo iterator stdexcept algorithm, ,
- AC_MSG_ERROR([need to have ANSI compliant headers]))
-dnl We need the sstream header. But since g++-2.95.n, n<3 does not provide
-dnl it, we must fall back to strstream, which, however, suffers from fixed
-dnl buffer sizes. So the fallback may produce a crippled library. NB: this
-dnl fallback will disappear in future versions.
-AC_CHECK_HEADERS(sstream strstream)
-if test "x${ac_cv_header_sstream}" = "xno"; then
- if test "x${ac_cv_header_strstream}" = "xno"; then
- AC_MSG_ERROR([I could not find the <sstream> or <strstream> header.])
- else
- GINAC_WARNING([I could not find <sstream>. <strstream> may cause trouble.])
- fi
-fi
+dnl Make sure all the necessary standard headers are installed on the system.
+AC_CHECK_HEADER(iosfwd, , GINAC_ERROR([The standard <iosfwd> header file could not be found.]))
+AC_CHECK_HEADER(iostream, , GINAC_ERROR([The standard <iostream> header file could not be found.]))
+AC_CHECK_HEADER(vector, , GINAC_ERROR([The standard <vector> header file could not be found.]))
+AC_CHECK_HEADER(list, , GINAC_ERROR([The standard <list> header file could not be found.]))
+AC_CHECK_HEADER(map, , GINAC_ERROR([The standard <map> header file could not be found.]))
+AC_CHECK_HEADER(string, , GINAC_ERROR([The standard <string> header file could not be found.]))
+AC_CHECK_HEADER(sstream, , GINAC_ERROR([The standard <sstream> header file could not be found.]))
+AC_CHECK_HEADER(typeinfo, , GINAC_ERROR([The standard <typeinfo> header file could not be found.]))
+AC_CHECK_HEADER(stdexcept, , GINAC_ERROR([The standard <stdexcept> header file could not be found.]))
+AC_CHECK_HEADER(algorithm, , GINAC_ERROR([The standard <algorithm> header file could not be found.]))
dnl We need to have Bruno Haible's CLN installed.
dnl (CLN versions >= 1.1.0 must have installed cln.m4 at a visible place,