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require 'mkmf'
dir_config("dbm")
if dblib = with_config("dbm-type", nil)
dblib = dblib.split(/[ ,]+/)
else
dblib = %w(libc db db2 db1 db5 db4 db3 dbm gdbm gdbm_compat qdbm)
end
headers = {
"libc" => ["ndbm.h"], # 4.4BSD libc contains Berkeley DB 1.
"db" => ["db.h"],
"db1" => ["db1/ndbm.h", "db1.h", "ndbm.h"],
"db2" => ["db2/db.h", "db2.h", "db.h"],
"db3" => ["db3/db.h", "db3.h", "db.h"],
"db4" => ["db4/db.h", "db4.h", "db.h"],
"db5" => ["db5/db.h", "db5.h", "db.h"],
"dbm" => ["ndbm.h"], # traditional ndbm (4.3BSD)
"gdbm" => ["gdbm-ndbm.h", "ndbm.h", "gdbm/ndbm.h"], # gdbm until 1.8.0
"gdbm_compat" => ["gdbm-ndbm.h", "ndbm.h", "gdbm/ndbm.h"], # gdbm since 1.8.1
"qdbm" => ["relic.h", "qdbm/relic.h"],
}
class << headers
attr_accessor :found
attr_accessor :defs
end
headers.found = []
headers.defs = nil
def headers.db_check(db, hdr)
old_libs = $libs.dup
old_defs = $defs.dup
result = db_check2(db, hdr)
if !result
$libs = old_libs
$defs = old_defs
end
result
end
def have_libvar(var, headers = nil, opt = "", &b)
checking_for checking_message([*var].compact.join(' '), headers, opt) do
try_libvar(var, headers, opt, &b)
end
end
def try_libvar(var, headers = nil, opt = "", &b)
var, type = *var
if try_link(<<"SRC", opt, &b)
#{cpp_include(headers)}
/*top*/
int main(int argc, char *argv[]) {
typedef #{type || 'int'} conftest_type;
extern conftest_type #{var};
conftest_type *conftest_var = &#{var};
return 0;
}
SRC
$defs.push(format("-DHAVE_LIBVAR_%s", var.tr_cpp))
true
else
false
end
end
def headers.db_check2(db, hdr)
db_prefix = ''
have_gdbm = false
hsearch = nil
case db
when /^db[2-5]?$/
db_prefix = "__db_n"
hsearch = "-DDB_DBM_HSEARCH"
when "gdbm"
have_gdbm = true
when "gdbm_compat"
have_gdbm = true
have_library("gdbm") or return false
end
if (have_library(db, db_prefix+"dbm_open") || have_func(db_prefix+"dbm_open")) and
hdr = self.fetch(db, ["ndbm.h"]).find {|h| have_type("DBM", h, hsearch)} or
hdr = self.fetch(db, ["ndbm.h"]).find {|h| have_type("DBM", ["db.h", h], hsearch)}
have_func(db_prefix+"dbm_clearerr") unless have_gdbm
$defs << hsearch if hsearch
case db
when /\Adb\d?\z/
have_func('db_version')
when /\Agdbm/
have_var("gdbm_version", hdr)
# gdbm_version is not declared by ndbm.h until gdbm 1.8.3.
# We can't include ndbm.h and gdbm.h because they both define datum type.
# ndbm.h includes gdbm.h and gdbm_version is declared since gdbm 1.9.
have_libvar(["gdbm_version", "char *"], hdr)
when /\Aqdbm\z/
have_var("dpversion", hdr)
end
if hsearch
$defs << hsearch
@defs = hsearch
end
$defs << '-DDBM_HDR="<'+hdr+'>"'
@found << hdr
true
else
false
end
end
if dblib.any? {|db| headers.fetch(db, ["ndbm.h"]).any? {|hdr| headers.db_check(db, hdr) } }
have_header("cdefs.h")
have_header("sys/cdefs.h")
create_makefile("dbm")
end
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