dnl Switch to C++ language mode for the following libraries and headers:
AC_LANG_CPLUSPLUS
+dnl Check for stuff needed for building the GiNaC interactive shell (ginsh):
+AC_CHECK_HEADERS(unistd.h)
+AC_CHECK_HEADERS(readline/readline.h readline/history.h)
+save_LIBS=$LIBS
+AC_CHECK_LIB(readline, readline)
+GINSH_LIBS=$LIBS
+LIBS=$save_LIBS
+AC_SUBST(GINSH_LIBS)
+
dnl Make sure the following libraries work by testing for symbols therein.
dnl They are automatically added the the variable $LIBS and thus passed into
dnl the Makefile:
AC_CHECK_HEADERS(iostream vector map string list typeinfo iterator strstream stdexcept algorithm, ,
AC_MSG_ERROR(need to have ANSI compliant headers))
-dnl We need to have Bruno Haible's CLN installed (macros are in aclocal.m4):
+dnl We need to have Bruno Haible's CLN installed (macros are in acinclude.m4):
GINAC_CHECK_CLN_H
GINAC_CHECK_LIBCLN
-dnl Check for stuff needed for building the GiNaC interactive shell (ginsh):
-AC_CHECK_HEADERS(unistd.h)
-AC_CHECK_HEADERS(readline/readline.h readline/history.h)
-AC_CHECK_LIB(readline, readline)
-
dnl Check for utilities needed by the different kinds of documentation.
dnl Documantation needs only be built when extending it, so never mind if it
dnl cannot find those helpers: