Fix ModuleManager failing when:

- LWP::Simple is not installed.
- Crypt::SSLeay or IO::Socket::SSL are not installed.

This fixes #154.

1 files changed, 8 insertions, 1 deletions

diff --git a/make/configure.pm b/make/configure.pm
index b8e39598a..606483e98 100644
--- a/make/configure.pm
+++ b/make/configure.pm
@@ -31,7 +31,7 @@ use warnings FATAL => qw(all);
 use Exporter 'import';
 use POSIX;
 use make::utilities;
-our @EXPORT = qw(promptnumeric dumphash is_dir getmodules getrevision getcompilerflags getlinkerflags getdependencies nopedantic resolve_directory yesno showhelp promptstring_s);
+our @EXPORT = qw(promptnumeric dumphash is_dir getmodules getrevision getcompilerflags getlinkerflags getdependencies nopedantic resolve_directory yesno showhelp promptstring_s module_installed);
 
 my $no_git = 0;
 
@@ -193,6 +193,13 @@ sub promptnumeric($$)
 	}
 }
 
+sub module_installed($)
+{
+	my $module = shift;
+	eval("use $module;");
+	return !$@;
+}
+
 sub promptstring_s($$)
 {
 	my ($prompt,$default) = @_;