sdbm can fail if a config.h exists in system directories

diff --git a/ext/SDBM_File/sdbm/Makefile.PL b/ext/SDBM_File/sdbm/Makefile.PL
index 21ad757..50fd83e 100644 (file)
--- a/ext/SDBM_File/sdbm/Makefile.PL
+++ b/ext/SDBM_File/sdbm/Makefile.PL
@@ -7,6 +7,7 @@ WriteMakefile(
     NAME      => 'sdbm', # (doesn't matter what the name is here) oh yes it does
     LINKTYPE  => 'static',
     DEFINE    => $define,
+    INC       => '-I$(PERL_INC)', # force PERL_INC dir ahead of system -I's
     SKIP      => [qw(dynamic dynamic_lib)],
     OBJECT    => '$(O_FILES)',
     clean     => {'FILES' => 'dbu libsdbm.a dbd dba dbe x-dbu *.dir *.pag'},