diff options
| -rw-r--r-- | configure.ac | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 3054abee6ba4..d24ebd5d8439 100644 --- a/configure.ac +++ b/configure.ac @@ -122,7 +122,15 @@ AC_PATH_PROG(bison, bison, false) NEED_PROG(perl, perl) NEED_PROG(tar, tar) AC_PATH_PROG(dot, dot) - + +# Test that Perl has the open/fork feature (Perl 5.8.0 and beyond). +AC_MSG_CHECKING([whether Perl is recent enough]) +if ! $perl -e 'open(FOO, "-|", "true"); while (<FOO>) { print; }; close FOO or die;'; then + AC_MSG_RESULT(no) + AC_MSG_ERROR([Your Perl version is too old. Nix requires Perl 5.8.0 or newer.]) +fi +AC_MSG_RESULT(yes) + NEED_PROG(cat, cat) AC_ARG_WITH(coreutils-bin, AC_HELP_STRING([--with-coreutils-bin=PATH], [path of cat, mkdir, etc.]), |