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-rw-r--r--ext/dbm/extconf.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/dbm/extconf.rb b/ext/dbm/extconf.rb
index 55dadc2601..9ce235a2b5 100644
--- a/ext/dbm/extconf.rb
+++ b/ext/dbm/extconf.rb
@@ -6,6 +6,7 @@ if have_library("gdbm", "dbm_open")
end
gdbm or have_library("db", "dbm_open") or have_library("dbm", "dbm_open")
have_header("cdefs.h")
+have_header("sys/cdefs.h")
if have_header("ndbm.h") and have_func("dbm_open")
have_func("dbm_clearerr") unless gdbm
create_makefile("dbm")