expand() before integer_content()

[ginac.git] / acinclude.m4

diff --git a/acinclude.m4 b/acinclude.m4
index 157d7b854fd096872900a477338df08c2b755aec..09d71cb3b2fa84fe7c49ba3e5d1e7c63c8e68748 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -4,13 +4,44 @@ dnl additions' names with AC_ but with GINAC_ in order to steer clear of
 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.  &#@$%*!
+AC_DEFUN([GINAC_LIB_READLINE_VERSION],
+[AC_CACHE_CHECK([for version of libreadline], ginac_cv_rlversion, [
+AC_TRY_RUN([
+#include <stdio.h>
+#include <sys/types.h>
+#include <readline/readline.h>
+
+int main()
+{
+    FILE *fd;
+    fd = fopen("conftest.out", "w");
+    fprintf(fd, "%s\n", rl_library_version);
+    fclose(fd);
+    return 0;
+}], ginac_cv_rlversion=`cat 'conftest.out'`, ginac_cv_rlversion='unknown', ginac_cv_rlversion='4.2')])
+if test "x${ginac_cv_rlversion}" != "xunknown"; then
+  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, $RL_VERSION_MINOR, [Minor version of installed readline library.])
+else
+  GINAC_WARNING([I could not run a test of libreadline (needed for building ginsh).])
+fi
+])
+
 dnl Usage: GINAC_TERMCAP
 dnl libreadline is based on the termcap functions.
 dnl Some systems have tgetent(), tgetnum(), tgetstr(), tgetflag(), tputs(),
 dnl tgoto() in libc, some have it in libtermcap, some have it in libncurses.
 dnl When both libtermcap and libncurses exist, we prefer the latter, because
 dnl libtermcap is being phased out.
-AC_DEFUN(GINAC_TERMCAP,
+AC_DEFUN([GINAC_TERMCAP],
 [LIBTERMCAP=
 AC_CHECK_FUNCS(tgetent)
 if test "x$ac_cv_func_tgetent" = "xyes"; then
@@ -27,7 +58,7 @@ AC_SUBST(LIBTERMCAP)
 dnl Usage: GINAC_ERROR(message)
 dnl This macro displays the warning "message" and sets the flag ginac_error
 dnl to yes.
-AC_DEFUN(GINAC_ERROR,[
+AC_DEFUN([GINAC_ERROR],[
 ginac_error_txt="$ginac_error_txt
 ** $1
 "
@@ -36,17 +67,17 @@ ginac_error=yes])
 dnl Usage: GINAC_WARNING(message)
 dnl This macro displays the warning "message" and sets the flag ginac_warning
 dnl to yes.
-AC_DEFUN(GINAC_WARNING,[
+AC_DEFUN([GINAC_WARNING],[
 ginac_warning_txt="$ginac_warning_txt
 == $1
 "
 ginac_warning=yes])
 
 dnl Usage: GINAC_CHECK_ERRORS
-dnl (preferably to be put at end of configure.in)
+dnl (must be put at end of configure.in, because it exits on error)
 dnl This macro displays a warning message if GINAC_ERROR or GINAC_WARNING 
 dnl has occured previously.
-AC_DEFUN(GINAC_CHECK_ERRORS,[
+AC_DEFUN([GINAC_CHECK_ERRORS],[
 if test "x${ginac_error}" = "xyes"; then
     echo "**** The following problems have been detected by configure."
     echo "**** Please check the messages below before running \"make\"."
@@ -55,14 +86,17 @@ if test "x${ginac_error}" = "xyes"; then
     if test "x${ginac_warning_txt}" != "x"; then
         echo "${ginac_warning_txt}"
     fi
-    echo "deleting cache ${cache_file}"
-    rm -f $cache_file
-    else 
-        if test x$ginac_warning = xyes; then
-            echo "=== The following minor problems have been detected by configure."
-            echo "=== Please check the messages below before running \"make\"."
-            echo "=== (see the section 'Common Problems' in the INSTALL file)"
-            echo "$ginac_warning_txt"
-        fi
+    if test "x$cache_file" != "x/dev/null"; then
+        echo "deleting cache ${cache_file}"
+        rm -f $cache_file
+    fi
+    exit 1
+else 
+    if test "x${ginac_warning}" = "xyes"; then
+        echo "=== The following minor problems have been detected by configure."
+        echo "=== Please check the messages below before running \"make\"."
+        echo "=== (see the section 'Common Problems' in the INSTALL file)"
+        echo "$ginac_warning_txt"
+    fi
     echo "Configuration of GiNaC $VERSION done. Now type \"make\"."
 fi])