bindings/Makefile: Hint the user at --with-perl-bindings.

… in case 'perl Makefile.PL' fails.

Fixes Github issue #290.

Signed-off-by: Florian Forster <octo@collectd.org>

diff --git a/bindings/Makefile.am b/bindings/Makefile.am
index b2ee4c1..07373e8 100644 (file)
--- a/bindings/Makefile.am
+++ b/bindings/Makefile.am
@@ -45,7 +45,13 @@ perl: buildperl/Makefile
 
 buildperl/Makefile: .perl-directory-stamp buildperl/Makefile.PL \
        $(top_builddir)/config.status
-       cd buildperl && @PERL@ Makefile.PL @PERL_BINDINGS_OPTIONS@
+       @# beautify the output a bit
+       @echo 'cd buildperl && @PERL@ Makefile.PL @PERL_BINDINGS_OPTIONS@'
+       @cd buildperl && ( if ! @PERL@ Makefile.PL @PERL_BINDINGS_OPTIONS@; then \
+                       echo ""; \
+                       echo 'Check whether you have set $$PERL_MM_OPT in your environment and try using ./configure --with-perl-bindings=""'; \
+                       echo ""; \
+               fi )
 
 buildperl/Makefile.PL: .perl-directory-stamp $(top_builddir)/config.status