parser: improve error reporting a little bit.

[ginac.git] / acinclude.m4

diff --git a/acinclude.m4 b/acinclude.m4
index 11c80399c6b4200c18d8f1879a3a46f29b7e78c4..dd7299c08ebea595232594d3c224e39918fe1015 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -26,7 +26,7 @@ int main()
     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'])])
+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'