perl: Properly override PERL_INC for subdirectory builds

Signed-off-by: Marcel Denia <naoir@gmx.net>

diff --git a/lang/perl/perlmod.mk b/lang/perl/perlmod.mk
index df5de2a724d11359330fbaf016c0cd7771c491a0..a6f4eaaf933eb9ef18b7ff09e54e7791b61d00c0 100644 (file)
--- a/lang/perl/perlmod.mk
+++ b/lang/perl/perlmod.mk
@@ -104,7 +104,7 @@ define perlmod/Configure
                LINKTYPE=dynamic \
                DESTDIR=$(PKG_INSTALL_DIR) \
        );
-       sed 's!^PERL_INC = .*!PERL_INC = $(STAGING_DIR)/usr/lib/perl5/$(PERL_VERSION)/CORE/!' -i $(PKG_BUILD_DIR)/Makefile
+       sed 's!^PERL_INC = .*!PERL_INC = $(STAGING_DIR)/usr/lib/perl5/$(PERL_VERSION)/CORE/!' -i $(if $(3),$(3),$(PKG_BUILD_DIR))/Makefile
 endef
 
 define perlmod/Compile