dnl future trouble.
dnl ===========================================================================
-dnl Usage: GINAC_RLVERSION
-dnl The maintainers of libreadline are complete morons: they don't care a shit
-dnl about compatiblilty (which is not so bad by itself) and at the same time
-dnl they don't export the version to the preprocessor so we could kluge around
-dnl incomatiblities. The only reliable way to figure out the version is by
-dnl checking the extern variable rl_library_version at runtime. &#@$%*!
-AC_DEFUN([GINAC_LIB_READLINE_VERSION],
-[AC_CACHE_CHECK([for version of libreadline], ginac_cv_rlversion, [
-AC_TRY_RUN([
-#include <stdio.h>
-#include <sys/types.h>
-#include <readline/readline.h>
-
-int main()
-{
- FILE *fd;
- fd = fopen("conftest.out", "w");
- fprintf(fd, "%s\n", rl_library_version);
- fclose(fd);
- return 0;
-}], [
-dnl Some non-GNU readline implementations have non-numeric rl_library_version
-ginac_cv_rlversion=`sed -e 's/[[^0-9.]]//g' 'conftest.out'`], [ ginac_cv_rlversion='unknown'], [ ginac_cv_rlversion='4.2'])])
-if test -z "$ginac_cv_rlversion"; then
- GINAC_WARNING([Unsupported version of libreadline.])
- ginac_cv_rlversion='unknown'
-fi
-if test "x${ginac_cv_rlversion}" != "xunknown"; then
- AC_DEFINE(REALLY_HAVE_LIBREADLINE, ,[Define if GNU libreadline is installed])
- RL_VERSION_MAJOR=`echo ${ginac_cv_rlversion} | sed -e 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
- AC_DEFINE_UNQUOTED(GINAC_RL_VERSION_MAJOR, $RL_VERSION_MAJOR, [Major version of installed readline library.])
- RL_VERSION_MINOR=`echo ${ginac_cv_rlversion} | sed -e 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`
- AC_DEFINE_UNQUOTED(GINAC_RL_VERSION_MINOR, $RL_VERSION_MINOR, [Minor version of installed readline library.])
+dnl Usage: GINAC_LIBREADLINE
+dnl
+dnl Check if GNU readline library and headers are avialable.
+dnl Defines GINSH_LIBS variable, and HAVE_LIBREADLINE,
+dnl HAVE_READLINE_READLINE_H, HAVE_READLINE_HISTORY_H preprocessor macros.
+dnl
+dnl Note: this macro rejects readline versions <= 4.2 and non-GNU
+dnl implementations.
+dnl
+AC_DEFUN([GINAC_READLINE],[
+AC_REQUIRE([GINAC_TERMCAP])
+GINSH_LIBS=""
+AC_CHECK_HEADERS(readline/readline.h readline/history.h)
+if test "x${ac_cv_header_readline_readline_h}" != "xyes" -o "x${ac_cv_header_readline_history_h}" != "xyes"; then
+ GINAC_WARNING([readline headers could not be found.])
else
- GINAC_WARNING([I could not run a test of libreadline (needed for building ginsh).])
+ AC_CACHE_CHECK([for version of libreadline], [ginac_cv_rl_supported], [
+ ginac_cv_rl_supported="no"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ #include <stdio.h>
+ #include <readline/readline.h>
+ #if !defined(RL_VERSION_MAJOR) || !defined(RL_VERSION_MINOR)
+ #error "Ancient/unsupported version of readline"
+ #endif]])],
+ [ginac_cv_rl_supported="yes"])])
+ if test "x${ginac_cv_rl_supported}" != "xyes"; then
+ GINAC_WARNING([Unsupported version of readline (<= 4.2 or non-GNU).])
+ else
+ save_LIBS="$LIBS"
+ LIBS="$LIBTERMCAP $LIBS"
+ AC_CHECK_LIB(readline, readline)
+ if test "x${ac_cv_lib_readline_readline}" != "xyes"; then
+ GINAC_WARNING([libreadline could not be found.])
+ fi
+ GINSH_LIBS="$LIBS"
+ LIBS="$save_LIBS"
+ fi
fi
-])
-
+AC_SUBST(GINSH_LIBS)])
+
dnl Usage: GINAC_TERMCAP
dnl libreadline is based on the termcap functions.
dnl Some systems have tgetent(), tgetnum(), tgetstr(), tgetflag(), tputs(),