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 gdbm_compat gdbm qdbm)
end
headers = {
"libc" => ["ndbm.h"], "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"],
"gdbm_compat" => ["gdbm-ndbm.h", "gdbm/ndbm.h", "ndbm.h"], "gdbm" => ["gdbm-ndbm.h", "gdbm/ndbm.h", "ndbm.h"], "qdbm" => ["qdbm/relic.h", "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_declared_libvar(var, headers = nil, opt = "", &b)
checking_for checking_message([*var].compact.join(' '), headers, opt) do
try_declared_libvar(var, headers, opt, &b)
end
end
def try_declared_libvar(var, headers = nil, opt = "", &b)
if try_link(<<"SRC", opt, &b)
#{cpp_include(headers)}
/*top*/
int main(int argc, char *argv[]) {
void *conftest_var = &#{var};
return 0;
}
SRC
$defs.push(format("-DHAVE_DECLARED_LIBVAR_%s", var.tr_cpp))
true
else
false
end
end
def have_undeclared_libvar(var, headers = nil, opt = "", &b)
checking_for checking_message([*var].compact.join(' '), headers, opt) do
try_undeclared_libvar(var, headers, opt, &b)
end
end
def try_undeclared_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_UNDECLARED_LIBVAR_%s", var.tr_cpp))
true
else
false
end
end
def have_empty_macro_dbm_clearerr(headers = nil, opt = "", &b)
checking_for checking_message('empty macro of dbm_clearerr(foobarbaz)',
headers, opt) do
try_toplevel('dbm_clearerr(foobarbaz)', headers, opt, &b)
end
end
def try_toplevel(src, headers = nil, opt = "", &b)
if try_compile(<<"SRC", opt, &b)
#{cpp_include(headers)}
/*top*/
#{src}
SRC
true
else
false
end
end
def headers.db_check2(db, hdr)
$defs.push(%{-DRUBYDBM_DBM_HEADER='"#{hdr}"'})
$defs.push(%{-DRUBYDBM_DBM_TYPE='"#{db}"'})
hsearch = nil
case db
when /^db[2-5]?$/
hsearch = "-DDB_DBM_HSEARCH"
when "gdbm_compat"
have_library("gdbm") or return false
end
if !have_type("DBM", hdr, hsearch)
return false
end
if !(db == 'libc' ? have_func('dbm_open("", 0, 0)', hdr, hsearch) :
have_library(db, 'dbm_open("", 0, 0)', hdr, hsearch))
return false
end
if !have_func('dbm_clearerr((DBM *)0)', hdr, hsearch)
return false
end
have_db_header = have_macro('DBM_SUFFIX', hdr, hsearch)
have_gdbm_header1 = have_empty_macro_dbm_clearerr(hdr, hsearch)
have_gdbm_header2 = have_macro('_GDBM_H_', hdr, hsearch)
have_ndbm_header = have_macro('_DBM_IOERR', hdr, hsearch)
if have_gdbm_header2 && db == 'gdbm'
return false
end
if have_db_header
$defs.push('-DRUBYDBM_DB_HEADER')
end
have_gdbm_header = have_gdbm_header1 | have_gdbm_header2
if have_gdbm_header
$defs.push('-DRUBYDBM_GDBM_HEADER')
end
if hdr == 'ndbm.h' && db != 'libc' && db != 'ndbm'
if /\Adb\d?\z/ !~ db && have_db_header
return false
end
if /\Agdbm/ !~ db && have_gdbm_header
return false
end
if have_ndbm_header
return false
end
end
have_func('db_version((int *)0, (int *)0, (int *)0)', hdr, hsearch)
have_gdbm_version = have_declared_libvar("gdbm_version", hdr, hsearch)
have_gdbm_version |= have_undeclared_libvar(["gdbm_version", "char *"], hdr, hsearch)
have_var("dpversion", hdr, hsearch)
if have_gdbm_header && !have_gdbm_version
return false
end
if have_db_header
have_type("DBC", hdr, hsearch)
end
if hsearch
$defs << hsearch
@defs = hsearch
end
$defs << '-DDBM_HDR="<'+hdr+'>"'
@found << hdr
puts "header: #{hdr}"
puts "library: #{db}"
true
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")
have_func("dbm_pagfno((DBM *)0)", headers.found, headers.defs)
have_func("dbm_dirfno((DBM *)0)", headers.found, headers.defs)
convertible_int("datum.dsize", headers.found, headers.defs)
create_makefile("dbm")
end