thr3ads.net - samba - [Samba] how to reduce binary size of SAMBA 4 for embeded device [Aug 2017]

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袁建鹏

2017-Aug-02 09:37 UTC

[Samba] how to reduce binary size of SAMBA 4 for embeded device

Hi, Bartlett

I decided to cut some subsystem by myself,
So I spent several days to study the SAMBA 4 WAF build system and now know the
base steps of build.
but which subsystem can be removed for snmd/nmbd/smbpasswd ?

followings are the full dependencies of these 3 binary

ldd bin/smbpasswd
	libpthread.so.0 => /lib/libpthread.so.0 (0xf7139000)
	libsamba-util.so.0 => /tmp/samba4/lib/libsamba-util.so.0 (0xf70c1000)
	libreplace-samba4.so => /tmp/samba4/lib/private/libreplace-samba4.so
(0xf70b0000)
	libmsrpc3-samba4.so => /tmp/samba4/lib/private/libmsrpc3-samba4.so
(0xf7086000)
	libsamba-errors.so.1 => /tmp/samba4/lib/libsamba-errors.so.1 (0xf6f90000)
	libsmbconf.so.0 => /tmp/samba4/lib/libsmbconf.so.0 (0xf6f27000)
	libtalloc.so.2 => /tmp/samba4/lib/private/libtalloc.so.2 (0xf6f12000)
	libsamba3-util-samba4.so => /tmp/samba4/lib/private/libsamba3-util-samba4.so
(0xf6efb000)
	libsamba-passdb.so.0 => /tmp/samba4/lib/libsamba-passdb.so.0 (0xf6eb6000)
	libdcerpc-samba-samba4.so =>
/tmp/samba4/lib/private/libdcerpc-samba-samba4.so (0xf6d71000)
	libsamba-debug-samba4.so => /tmp/samba4/lib/private/libsamba-debug-samba4.so
(0xf6d5d000)
	liblibsmb-samba4.so => /tmp/samba4/lib/private/liblibsmb-samba4.so
(0xf6cfa000)
	libcliauth-samba4.so => /tmp/samba4/lib/private/libcliauth-samba4.so
(0xf6cdb000)
	libndr-standard.so.0 => /tmp/samba4/lib/libndr-standard.so.0 (0xf6a22000)
	libcli-smb-common-samba4.so =>
/tmp/samba4/lib/private/libcli-smb-common-samba4.so (0xf69f1000)
	libsecrets3-samba4.so => /tmp/samba4/lib/private/libsecrets3-samba4.so
(0xf69d9000)
	libc.so.6 => /lib/libc.so.6 (0xf689b000)
	/lib/ld-linux.so.3 (0xf7162000)
	libtime-basic-samba4.so => /tmp/samba4/lib/private/libtime-basic-samba4.so
(0xf688a000)
	libgenrand-samba4.so => /tmp/samba4/lib/private/libgenrand-samba4.so
(0xf6879000)
	libsocket-blocking-samba4.so =>
/tmp/samba4/lib/private/libsocket-blocking-samba4.so (0xf6868000)
	libtevent.so.0 => /tmp/samba4/lib/private/libtevent.so.0 (0xf684d000)
	librt.so.1 => /lib/librt.so.1 (0xf6836000)
	libtevent-util.so.0 => /tmp/samba4/lib/libtevent-util.so.0 (0xf6824000)
	libsamba-credentials.so.0 => /tmp/samba4/lib/libsamba-credentials.so.0
(0xf6806000)
	libndr-samba-samba4.so => /tmp/samba4/lib/private/libndr-samba-samba4.so
(0xf66f8000)
	libsamba-hostconfig.so.0 => /tmp/samba4/lib/libsamba-hostconfig.so.0
(0xf66cc000)
	libdbwrap-samba4.so => /tmp/samba4/lib/private/libdbwrap-samba4.so
(0xf66b4000)
	libdcerpc-binding.so.0 => /tmp/samba4/lib/libdcerpc-binding.so.0
(0xf668d000)
	libutil-tdb-samba4.so => /tmp/samba4/lib/private/libutil-tdb-samba4.so
(0xf667b000)
	libgse-samba4.so => /tmp/samba4/lib/private/libgse-samba4.so (0xf664a000)
	libsamba-sockets-samba4.so =>
/tmp/samba4/lib/private/libsamba-sockets-samba4.so (0xf6628000)
	libndr.so.0 => /tmp/samba4/lib/libndr.so.0 (0xf6608000)
	libgensec-samba4.so => /tmp/samba4/lib/private/libgensec-samba4.so
(0xf65e7000)
	libsmbregistry-samba4.so => /tmp/samba4/lib/private/libsmbregistry-samba4.so
(0xf65c0000)
	libtalloc-report-samba4.so =>
/tmp/samba4/lib/private/libtalloc-report-samba4.so (0xf65af000)
	libmessages-dgm-samba4.so =>
/tmp/samba4/lib/private/libmessages-dgm-samba4.so (0xf6598000)
	libCHARSET3-samba4.so => /tmp/samba4/lib/private/libCHARSET3-samba4.so
(0xf6586000)
	libsys-rw-samba4.so => /tmp/samba4/lib/private/libsys-rw-samba4.so
(0xf6575000)
	libsamba-security-samba4.so =>
/tmp/samba4/lib/private/libsamba-security-samba4.so (0xf654f000)
	libmessages-util-samba4.so =>
/tmp/samba4/lib/private/libmessages-util-samba4.so (0xf653e000)
	libinterfaces-samba4.so => /tmp/samba4/lib/private/libinterfaces-samba4.so
(0xf652c000)
	libserver-id-db-samba4.so =>
/tmp/samba4/lib/private/libserver-id-db-samba4.so (0xf651a000)
	libsamba-cluster-support-samba4.so =>
/tmp/samba4/lib/private/libsamba-cluster-support-samba4.so (0xf6509000)
	libutil-reg-samba4.so => /tmp/samba4/lib/private/libutil-reg-samba4.so
(0xf64f8000)
	libtdb.so.1 => /tmp/samba4/lib/private/libtdb.so.1 (0xf64d7000)
	libsmbd-shim-samba4.so => /tmp/samba4/lib/private/libsmbd-shim-samba4.so
(0xf64c6000)
	libutil-setid-samba4.so => /tmp/samba4/lib/private/libutil-setid-samba4.so
(0xf64b5000)
	libtdb-wrap-samba4.so => /tmp/samba4/lib/private/libtdb-wrap-samba4.so
(0xf64a3000)
	libsmb-transport-samba4.so =>
/tmp/samba4/lib/private/libsmb-transport-samba4.so (0xf648f000)
	libserver-role-samba4.so => /tmp/samba4/lib/private/libserver-role-samba4.so
(0xf647e000)
	libnsl.so.1 => /lib/libnsl.so.1 (0xf645a000)
	libwbclient.so.0 => /tmp/samba4/lib/libwbclient.so.0 (0xf643f000)
	libsamba-modules-samba4.so =>
/tmp/samba4/lib/private/libsamba-modules-samba4.so (0xf642d000)
	libcli-cldap-samba4.so => /tmp/samba4/lib/private/libcli-cldap-samba4.so
(0xf6417000)
	libkrb5samba-samba4.so => /tmp/samba4/lib/private/libkrb5samba-samba4.so
(0xf63fd000)
	libutil-cmdline-samba4.so =>
/tmp/samba4/lib/private/libutil-cmdline-samba4.so (0xf63eb000)
	libcom_err-samba4.so.0 => /tmp/samba4/lib/private/libcom_err-samba4.so.0
(0xf63d9000)
	libasn1util-samba4.so => /tmp/samba4/lib/private/libasn1util-samba4.so
(0xf63c5000)
	libndr-nbt.so.0 => /tmp/samba4/lib/libndr-nbt.so.0 (0xf63a4000)
	libiov-buf-samba4.so => /tmp/samba4/lib/private/libiov-buf-samba4.so
(0xf6393000)
	libldb.so.1 => /tmp/samba4/lib/private/libldb.so.1 (0xf635f000)
	libsamdb-common-samba4.so =>
/tmp/samba4/lib/private/libsamdb-common-samba4.so (0xf632c000)
	libgssapi-samba4.so.2 => /tmp/samba4/lib/private/libgssapi-samba4.so.2
(0xf62f9000)
	libldbsamba-samba4.so => /tmp/samba4/lib/private/libldbsamba-samba4.so
(0xf62c8000)
	libauthkrb5-samba4.so => /tmp/samba4/lib/private/libauthkrb5-samba4.so
(0xf62ab000)
	libkrb5-samba4.so.26 => /tmp/samba4/lib/private/libkrb5-samba4.so.26
(0xf624d000)
	libz-samba4.so => /tmp/samba4/lib/private/libz-samba4.so (0xf622e000)
	libaddns-samba4.so => /tmp/samba4/lib/private/libaddns-samba4.so
(0xf6216000)
	libcli-nbt-samba4.so => /tmp/samba4/lib/private/libcli-nbt-samba4.so
(0xf61fe000)
	libsamdb.so.0 => /tmp/samba4/lib/libsamdb.so.0 (0xf61db000)
	libmsghdr-samba4.so => /tmp/samba4/lib/private/libmsghdr-samba4.so
(0xf61c9000)
	libwinbind-client-samba4.so =>
/tmp/samba4/lib/private/libwinbind-client-samba4.so (0xf61b7000)
	libdl.so.2 => /lib/libdl.so.2 (0xf61a4000)
	libcli-ldap-common-samba4.so =>
/tmp/samba4/lib/private/libcli-ldap-common-samba4.so (0xf618d000)
	libasn1-samba4.so.8 => /tmp/samba4/lib/private/libasn1-samba4.so.8
(0xf6125000)
	libflag-mapping-samba4.so =>
/tmp/samba4/lib/private/libflag-mapping-samba4.so (0xf6114000)
	libroken-samba4.so.19 => /tmp/samba4/lib/private/libroken-samba4.so.19
(0xf60fb000)
	libhcrypto-samba4.so.5 => /tmp/samba4/lib/private/libhcrypto-samba4.so.5
(0xf60c2000)
	libheimbase-samba4.so.1 => /tmp/samba4/lib/private/libheimbase-samba4.so.1
(0xf60af000)
	libndr-krb5pac.so.0 => /tmp/samba4/lib/libndr-krb5pac.so.0 (0xf6095000)
	libauth-sam-reply-samba4.so =>
/tmp/samba4/lib/private/libauth-sam-reply-samba4.so (0xf6082000)
	libhx509-samba4.so.5 => /tmp/samba4/lib/private/libhx509-samba4.so.5
(0xf6040000)
	libwind-samba4.so.0 => /tmp/samba4/lib/private/libwind-samba4.so.0
(0xf6009000)
	libresolv.so.2 => /lib/libresolv.so.2 (0xf5fe5000)

ldd sbin/nmbd
	libpthread.so.0 => /lib/libpthread.so.0 (0xf73b6000)
	libpopt-samba3-samba4.so => /tmp/samba4/lib/private/libpopt-samba3-samba4.so
(0xf73a2000)
	libsamba-util.so.0 => /tmp/samba4/lib/libsamba-util.so.0 (0xf732a000)
	liblibsmb-samba4.so => /tmp/samba4/lib/private/liblibsmb-samba4.so
(0xf72c7000)
	libsamba-errors.so.1 => /tmp/samba4/lib/libsamba-errors.so.1 (0xf71d1000)
	libtevent.so.0 => /tmp/samba4/lib/private/libtevent.so.0 (0xf71b6000)
	libreplace-samba4.so => /tmp/samba4/lib/private/libreplace-samba4.so
(0xf71a5000)
	libsamba-security-samba4.so =>
/tmp/samba4/lib/private/libsamba-security-samba4.so (0xf717f000)
	libsmbconf.so.0 => /tmp/samba4/lib/libsmbconf.so.0 (0xf7116000)
	libtalloc.so.2 => /tmp/samba4/lib/private/libtalloc.so.2 (0xf7101000)
	libsys-rw-samba4.so => /tmp/samba4/lib/private/libsys-rw-samba4.so
(0xf70f0000)
	libutil-tdb-samba4.so => /tmp/samba4/lib/private/libutil-tdb-samba4.so
(0xf70de000)
	libsamba3-util-samba4.so => /tmp/samba4/lib/private/libsamba3-util-samba4.so
(0xf70c7000)
	libsocket-blocking-samba4.so =>
/tmp/samba4/lib/private/libsocket-blocking-samba4.so (0xf70b6000)
	libsamba-sockets-samba4.so =>
/tmp/samba4/lib/private/libsamba-sockets-samba4.so (0xf7094000)
	libndr.so.0 => /tmp/samba4/lib/libndr.so.0 (0xf7074000)
	libpopt-samba4.so => /tmp/samba4/lib/private/libpopt-samba4.so (0xf705e000)
	libsamba-debug-samba4.so => /tmp/samba4/lib/private/libsamba-debug-samba4.so
(0xf704a000)
	libcli-cldap-samba4.so => /tmp/samba4/lib/private/libcli-cldap-samba4.so
(0xf7034000)
	libcli-smb-common-samba4.so =>
/tmp/samba4/lib/private/libcli-smb-common-samba4.so (0xf7003000)
	libgse-samba4.so => /tmp/samba4/lib/private/libgse-samba4.so (0xf6fd2000)
	libtdb.so.1 => /tmp/samba4/lib/private/libtdb.so.1 (0xf6fb1000)
	libCHARSET3-samba4.so => /tmp/samba4/lib/private/libCHARSET3-samba4.so
(0xf6f9f000)
	libsmbregistry-samba4.so => /tmp/samba4/lib/private/libsmbregistry-samba4.so
(0xf6f78000)
	libndr-nbt.so.0 => /tmp/samba4/lib/libndr-nbt.so.0 (0xf6f57000)
	libcli-nbt-samba4.so => /tmp/samba4/lib/private/libcli-nbt-samba4.so
(0xf6f3f000)
	libc.so.6 => /lib/libc.so.6 (0xf6e01000)
	/lib/ld-linux.so.3 (0xf73df000)
	libutil-cmdline-samba4.so =>
/tmp/samba4/lib/private/libutil-cmdline-samba4.so (0xf6def000)
	libsamba-hostconfig.so.0 => /tmp/samba4/lib/libsamba-hostconfig.so.0
(0xf6dc3000)
	libtime-basic-samba4.so => /tmp/samba4/lib/private/libtime-basic-samba4.so
(0xf6db2000)
	libgenrand-samba4.so => /tmp/samba4/lib/private/libgenrand-samba4.so
(0xf6da1000)
	librt.so.1 => /lib/librt.so.1 (0xf6d8a000)
	libcliauth-samba4.so => /tmp/samba4/lib/private/libcliauth-samba4.so
(0xf6d6b000)
	libkrb5samba-samba4.so => /tmp/samba4/lib/private/libkrb5samba-samba4.so
(0xf6d51000)
	libgensec-samba4.so => /tmp/samba4/lib/private/libgensec-samba4.so
(0xf6d30000)
	libcom_err-samba4.so.0 => /tmp/samba4/lib/private/libcom_err-samba4.so.0
(0xf6d1e000)
	libasn1util-samba4.so => /tmp/samba4/lib/private/libasn1util-samba4.so
(0xf6d0a000)
	libtevent-util.so.0 => /tmp/samba4/lib/libtevent-util.so.0 (0xf6cf8000)
	libsmb-transport-samba4.so =>
/tmp/samba4/lib/private/libsmb-transport-samba4.so (0xf6ce4000)
	libsamba-credentials.so.0 => /tmp/samba4/lib/libsamba-credentials.so.0
(0xf6cc6000)
	libtalloc-report-samba4.so =>
/tmp/samba4/lib/private/libtalloc-report-samba4.so (0xf6cb5000)
	libmessages-dgm-samba4.so =>
/tmp/samba4/lib/private/libmessages-dgm-samba4.so (0xf6c9e000)
	libmessages-util-samba4.so =>
/tmp/samba4/lib/private/libmessages-util-samba4.so (0xf6c8d000)
	libinterfaces-samba4.so => /tmp/samba4/lib/private/libinterfaces-samba4.so
(0xf6c7b000)
	libserver-id-db-samba4.so =>
/tmp/samba4/lib/private/libserver-id-db-samba4.so (0xf6c69000)
	libdbwrap-samba4.so => /tmp/samba4/lib/private/libdbwrap-samba4.so
(0xf6c51000)
	libsamba-cluster-support-samba4.so =>
/tmp/samba4/lib/private/libsamba-cluster-support-samba4.so (0xf6c40000)
	libutil-reg-samba4.so => /tmp/samba4/lib/private/libutil-reg-samba4.so
(0xf6c2f000)
	libsmbd-shim-samba4.so => /tmp/samba4/lib/private/libsmbd-shim-samba4.so
(0xf6c1e000)
	libutil-setid-samba4.so => /tmp/samba4/lib/private/libutil-setid-samba4.so
(0xf6c0d000)
	libtdb-wrap-samba4.so => /tmp/samba4/lib/private/libtdb-wrap-samba4.so
(0xf6bfb000)
	libserver-role-samba4.so => /tmp/samba4/lib/private/libserver-role-samba4.so
(0xf6bea000)
	libndr-standard.so.0 => /tmp/samba4/lib/libndr-standard.so.0 (0xf6931000)
	libnsl.so.1 => /lib/libnsl.so.1 (0xf690d000)
	libiov-buf-samba4.so => /tmp/samba4/lib/private/libiov-buf-samba4.so
(0xf68fc000)
	libldb.so.1 => /tmp/samba4/lib/private/libldb.so.1 (0xf68c8000)
	libcli-ldap-common-samba4.so =>
/tmp/samba4/lib/private/libcli-ldap-common-samba4.so (0xf68b2000)
	libkrb5-samba4.so.26 => /tmp/samba4/lib/private/libkrb5-samba4.so.26
(0xf6854000)
	libaddns-samba4.so => /tmp/samba4/lib/private/libaddns-samba4.so
(0xf683c000)
	libgssapi-samba4.so.2 => /tmp/samba4/lib/private/libgssapi-samba4.so.2
(0xf6809000)
	libsecrets3-samba4.so => /tmp/samba4/lib/private/libsecrets3-samba4.so
(0xf67f1000)
	libauthkrb5-samba4.so => /tmp/samba4/lib/private/libauthkrb5-samba4.so
(0xf67d4000)
	libndr-samba-samba4.so => /tmp/samba4/lib/private/libndr-samba-samba4.so
(0xf66c6000)
	libasn1-samba4.so.8 => /tmp/samba4/lib/private/libasn1-samba4.so.8
(0xf665e000)
	libwbclient.so.0 => /tmp/samba4/lib/libwbclient.so.0 (0xf6643000)
	libsamba-modules-samba4.so =>
/tmp/samba4/lib/private/libsamba-modules-samba4.so (0xf6631000)
	libsamdb.so.0 => /tmp/samba4/lib/libsamdb.so.0 (0xf660e000)
	libsamdb-common-samba4.so =>
/tmp/samba4/lib/private/libsamdb-common-samba4.so (0xf65db000)
	libldbsamba-samba4.so => /tmp/samba4/lib/private/libldbsamba-samba4.so
(0xf65a9000)
	libmsghdr-samba4.so => /tmp/samba4/lib/private/libmsghdr-samba4.so
(0xf6598000)
	libdl.so.2 => /lib/libdl.so.2 (0xf6585000)
	libheimbase-samba4.so.1 => /tmp/samba4/lib/private/libheimbase-samba4.so.1
(0xf6572000)
	libhx509-samba4.so.5 => /tmp/samba4/lib/private/libhx509-samba4.so.5
(0xf6530000)
	libhcrypto-samba4.so.5 => /tmp/samba4/lib/private/libhcrypto-samba4.so.5
(0xf64f8000)
	libroken-samba4.so.19 => /tmp/samba4/lib/private/libroken-samba4.so.19
(0xf64df000)
	libwind-samba4.so.0 => /tmp/samba4/lib/private/libwind-samba4.so.0
(0xf64a8000)
	libresolv.so.2 => /lib/libresolv.so.2 (0xf6484000)
	libndr-krb5pac.so.0 => /tmp/samba4/lib/libndr-krb5pac.so.0 (0xf6469000)
	libauth-sam-reply-samba4.so =>
/tmp/samba4/lib/private/libauth-sam-reply-samba4.so (0xf6456000)
	libz-samba4.so => /tmp/samba4/lib/private/libz-samba4.so (0xf6437000)
	libwinbind-client-samba4.so =>
/tmp/samba4/lib/private/libwinbind-client-samba4.so (0xf6425000)
	libflag-mapping-samba4.so =>
/tmp/samba4/lib/private/libflag-mapping-samba4.so (0xf6413000)

ldd sbin/smbd
	libpthread.so.0 => /lib/libpthread.so.0 (0xf7086000)
	libsamba-util.so.0 => /tmp/samba4/lib/libsamba-util.so.0 (0xf700e000)
	libsmbd-base-samba4.so => /tmp/samba4/lib/private/libsmbd-base-samba4.so
(0xf6d56000)
	libsamba-debug-samba4.so => /tmp/samba4/lib/private/libsamba-debug-samba4.so
(0xf6d42000)
	libgenrand-samba4.so => /tmp/samba4/lib/private/libgenrand-samba4.so
(0xf6d31000)
	libtalloc.so.2 => /tmp/samba4/lib/private/libtalloc.so.2 (0xf6d1c000)
	libsocket-blocking-samba4.so =>
/tmp/samba4/lib/private/libsocket-blocking-samba4.so (0xf6d0b000)
	libtevent.so.0 => /tmp/samba4/lib/private/libtevent.so.0 (0xf6cf0000)
	libsmbregistry-samba4.so => /tmp/samba4/lib/private/libsmbregistry-samba4.so
(0xf6cc9000)
	libtevent-util.so.0 => /tmp/samba4/lib/libtevent-util.so.0 (0xf6cb7000)
	libndr-samba-samba4.so => /tmp/samba4/lib/private/libndr-samba-samba4.so
(0xf6ba9000)
	libsamba-errors.so.1 => /tmp/samba4/lib/libsamba-errors.so.1 (0xf6ab3000)
	libsys-rw-samba4.so => /tmp/samba4/lib/private/libsys-rw-samba4.so
(0xf6aa2000)
	libsamba3-util-samba4.so => /tmp/samba4/lib/private/libsamba3-util-samba4.so
(0xf6a8b000)
	libsamba-passdb.so.0 => /tmp/samba4/lib/libsamba-passdb.so.0 (0xf6a46000)
	libcliauth-samba4.so => /tmp/samba4/lib/private/libcliauth-samba4.so
(0xf6a27000)
	libpopt-samba3-samba4.so => /tmp/samba4/lib/private/libpopt-samba3-samba4.so
(0xf6a13000)
	libauth-samba4.so => /tmp/samba4/lib/private/libauth-samba4.so (0xf69e6000)
	libsmbconf.so.0 => /tmp/samba4/lib/libsmbconf.so.0 (0xf697d000)
	libsamba-cluster-support-samba4.so =>
/tmp/samba4/lib/private/libsamba-cluster-support-samba4.so (0xf696c000)
	libsamba-sockets-samba4.so =>
/tmp/samba4/lib/private/libsamba-sockets-samba4.so (0xf694a000)
	libsmbd-shim-samba4.so => /tmp/samba4/lib/private/libsmbd-shim-samba4.so
(0xf6939000)
	libndr-standard.so.0 => /tmp/samba4/lib/libndr-standard.so.0 (0xf6680000)
	libsecrets3-samba4.so => /tmp/samba4/lib/private/libsecrets3-samba4.so
(0xf6668000)
	libsamba-hostconfig.so.0 => /tmp/samba4/lib/libsamba-hostconfig.so.0
(0xf663c000)
	libpopt-samba4.so => /tmp/samba4/lib/private/libpopt-samba4.so (0xf6626000)
	libc.so.6 => /lib/libc.so.6 (0xf64e8000)
	/lib/ld-linux.so.3 (0xf70af000)
	libtime-basic-samba4.so => /tmp/samba4/lib/private/libtime-basic-samba4.so
(0xf64d7000)
	libreplace-samba4.so => /tmp/samba4/lib/private/libreplace-samba4.so
(0xf64c6000)
	librt.so.1 => /lib/librt.so.1 (0xf64af000)
	libprinting-migrate-samba4.so =>
/tmp/samba4/lib/private/libprinting-migrate-samba4.so (0xf648d000)
	libmessages-dgm-samba4.so =>
/tmp/samba4/lib/private/libmessages-dgm-samba4.so (0xf6476000)
	libsamba-security-samba4.so =>
/tmp/samba4/lib/private/libsamba-security-samba4.so (0xf6450000)
	libnetapi.so.0 => /tmp/samba4/lib/libnetapi.so.0 (0xf63f2000)
	libsmbd-conn-samba4.so => /tmp/samba4/lib/private/libsmbd-conn-samba4.so
(0xf63e0000)
	libutil-tdb-samba4.so => /tmp/samba4/lib/private/libutil-tdb-samba4.so
(0xf63ce000)
	libnpa-tstream-samba4.so => /tmp/samba4/lib/private/libnpa-tstream-samba4.so
(0xf63b7000)
	libtdb.so.1 => /tmp/samba4/lib/private/libtdb.so.1 (0xf6396000)
	liblibsmb-samba4.so => /tmp/samba4/lib/private/liblibsmb-samba4.so
(0xf6333000)
	libmsrpc3-samba4.so => /tmp/samba4/lib/private/libmsrpc3-samba4.so
(0xf6309000)
	libserver-id-db-samba4.so =>
/tmp/samba4/lib/private/libserver-id-db-samba4.so (0xf62f7000)
	libdbwrap-samba4.so => /tmp/samba4/lib/private/libdbwrap-samba4.so
(0xf62df000)
	libiov-buf-samba4.so => /tmp/samba4/lib/private/libiov-buf-samba4.so
(0xf62ce000)
	libkrb5samba-samba4.so => /tmp/samba4/lib/private/libkrb5samba-samba4.so
(0xf62b4000)
	libdcerpc-samba-samba4.so =>
/tmp/samba4/lib/private/libdcerpc-samba-samba4.so (0xf616f000)
	libndr.so.0 => /tmp/samba4/lib/libndr.so.0 (0xf614f000)
	libutil-reg-samba4.so => /tmp/samba4/lib/private/libutil-reg-samba4.so
(0xf613e000)
	libcli-spoolss-samba4.so => /tmp/samba4/lib/private/libcli-spoolss-samba4.so
(0xf612a000)
	libcom_err-samba4.so.0 => /tmp/samba4/lib/private/libcom_err-samba4.so.0
(0xf6118000)
	libads-samba4.so => /tmp/samba4/lib/private/libads-samba4.so (0xf60fe000)
	libwbclient.so.0 => /tmp/samba4/lib/libwbclient.so.0 (0xf60e3000)
	libutil-setid-samba4.so => /tmp/samba4/lib/private/libutil-setid-samba4.so
(0xf60d2000)
	liblibcli-lsa3-samba4.so => /tmp/samba4/lib/private/liblibcli-lsa3-samba4.so
(0xf60bf000)
	libcli-smb-common-samba4.so =>
/tmp/samba4/lib/private/libcli-smb-common-samba4.so (0xf608e000)
	libgse-samba4.so => /tmp/samba4/lib/private/libgse-samba4.so (0xf605d000)
	libgensec-samba4.so => /tmp/samba4/lib/private/libgensec-samba4.so
(0xf603c000)
	libdcerpc-binding.so.0 => /tmp/samba4/lib/libdcerpc-binding.so.0
(0xf6015000)
	libndr-samba4.so => /tmp/samba4/lib/private/libndr-samba4.so (0xf5f02000)
	libCHARSET3-samba4.so => /tmp/samba4/lib/private/libCHARSET3-samba4.so
(0xf5ef0000)
	libauthkrb5-samba4.so => /tmp/samba4/lib/private/libauthkrb5-samba4.so
(0xf5ed3000)
	libsmb-transport-samba4.so =>
/tmp/samba4/lib/private/libsmb-transport-samba4.so (0xf5ebf000)
	libsamba-modules-samba4.so =>
/tmp/samba4/lib/private/libsamba-modules-samba4.so (0xf5ead000)
	libasn1util-samba4.so => /tmp/samba4/lib/private/libasn1util-samba4.so
(0xf5e99000)
	libndr-nbt.so.0 => /tmp/samba4/lib/libndr-nbt.so.0 (0xf5e78000)
	libz-samba4.so => /tmp/samba4/lib/private/libz-samba4.so (0xf5e59000)
	libsamba-credentials.so.0 => /tmp/samba4/lib/libsamba-credentials.so.0
(0xf5e3b000)
	libtdb-wrap-samba4.so => /tmp/samba4/lib/private/libtdb-wrap-samba4.so
(0xf5e29000)
	libutil-cmdline-samba4.so =>
/tmp/samba4/lib/private/libutil-cmdline-samba4.so (0xf5e17000)
	liblibcli-netlogon3-samba4.so =>
/tmp/samba4/lib/private/liblibcli-netlogon3-samba4.so (0xf5e03000)
	libndr-krb5pac.so.0 => /tmp/samba4/lib/libndr-krb5pac.so.0 (0xf5de9000)
	libauth-sam-reply-samba4.so =>
/tmp/samba4/lib/private/libauth-sam-reply-samba4.so (0xf5dd6000)
	libnsl.so.1 => /lib/libnsl.so.1 (0xf5db1000)
	libcrypt.so.1 => /lib/libcrypt.so.1 (0xf5d72000)
	libtalloc-report-samba4.so =>
/tmp/samba4/lib/private/libtalloc-report-samba4.so (0xf5d61000)
	libmessages-util-samba4.so =>
/tmp/samba4/lib/private/libmessages-util-samba4.so (0xf5d50000)
	libinterfaces-samba4.so => /tmp/samba4/lib/private/libinterfaces-samba4.so
(0xf5d3e000)
	libserver-role-samba4.so => /tmp/samba4/lib/private/libserver-role-samba4.so
(0xf5d2c000)
	libmsghdr-samba4.so => /tmp/samba4/lib/private/libmsghdr-samba4.so
(0xf5d1b000)
	libtrusts-util-samba4.so => /tmp/samba4/lib/private/libtrusts-util-samba4.so
(0xf5d08000)
	libflag-mapping-samba4.so =>
/tmp/samba4/lib/private/libflag-mapping-samba4.so (0xf5cf6000)
	libcli-cldap-samba4.so => /tmp/samba4/lib/private/libcli-cldap-samba4.so
(0xf5ce0000)
	libkrb5-samba4.so.26 => /tmp/samba4/lib/private/libkrb5-samba4.so.26
(0xf5c82000)
	libasn1-samba4.so.8 => /tmp/samba4/lib/private/libasn1-samba4.so.8
(0xf5c19000)
	libaddns-samba4.so => /tmp/samba4/lib/private/libaddns-samba4.so
(0xf5c01000)
	libwinbind-client-samba4.so =>
/tmp/samba4/lib/private/libwinbind-client-samba4.so (0xf5bef000)
	libgssapi-samba4.so.2 => /tmp/samba4/lib/private/libgssapi-samba4.so.2
(0xf5bbb000)
	libcli-nbt-samba4.so => /tmp/samba4/lib/private/libcli-nbt-samba4.so
(0xf5ba3000)
	libsamdb.so.0 => /tmp/samba4/lib/libsamdb.so.0 (0xf5b80000)
	libdl.so.2 => /lib/libdl.so.2 (0xf5b6d000)
	libldb.so.1 => /tmp/samba4/lib/private/libldb.so.1 (0xf5b38000)
	libsamdb-common-samba4.so =>
/tmp/samba4/lib/private/libsamdb-common-samba4.so (0xf5b05000)
	libldbsamba-samba4.so => /tmp/samba4/lib/private/libldbsamba-samba4.so
(0xf5ad4000)
	libcli-ldap-common-samba4.so =>
/tmp/samba4/lib/private/libcli-ldap-common-samba4.so (0xf5abe000)
	libheimbase-samba4.so.1 => /tmp/samba4/lib/private/libheimbase-samba4.so.1
(0xf5aaa000)
	libhx509-samba4.so.5 => /tmp/samba4/lib/private/libhx509-samba4.so.5
(0xf5a69000)
	libhcrypto-samba4.so.5 => /tmp/samba4/lib/private/libhcrypto-samba4.so.5
(0xf5a31000)
	libroken-samba4.so.19 => /tmp/samba4/lib/private/libroken-samba4.so.19
(0xf5a18000)
	libwind-samba4.so.0 => /tmp/samba4/lib/private/libwind-samba4.so.0
(0xf59e1000)
	libresolv.so.2 => /lib/libresolv.so.2 (0xf59bc000)

Thanks very much.
> -----原始邮件-----
> 发件人: "Andrew Bartlett via samba" <samba at lists.samba.org>
> 发送时间: 2017-07-30 16:17:30 (星期日)
> 收件人: "yuanjp at hust.edu.cn" <yuanjp at hust.edu.cn>, samba
<samba at lists.samba.org>
> 抄送: 
> 主题: Re: [Samba] how to reduce binary size of SAMBA 4 for embeded device
> 
> On Sun, 2017-07-30 at 15:18 +0800, yuanjp--- via samba wrote:
> > Hi Bartlett
> > 
> > as far as I know, lots of soho router still use SAMBA 3
> > I think the binary size is the main consideration.
> > does Samba team have a plan for --with-tiny-smbd?
> > We look forward to it.
> 
> Not that I'm aware of.  I had expected interest when I posted my
> efforts with link-time-optimisation, but nothing went anywhere.  
> 
> So from here, I suggest you either dig into the build system (patches
> most welcome!), or contract a Samba development shop[1] to look into
> this for you.
> 
> If you do dig into the build system, look at how the MIT KDC and
> without-ad-dc options are implemented, using the enabled flag on each
> subsystem.
> 
> Thanks,
> 
> Andrew Bartlett
> [1] https://www.samba.org/samba/support/globalsupport.html
> 
> -- 
> Andrew Bartlett                       http://samba.org/~abartlet/
> Authentication Developer, Samba Team  http://samba.org
> Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba
> 
> 
> -- 
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/options/samba

Andrew Bartlett

2017-Aug-06 05:03 UTC

head link

[Samba] how to reduce binary size of SAMBA 4 for embeded device

On Wed, 2017-08-02 at 17:37 +0800, 袁建鹏 wrote:> Hi, Bartlett
> 
> I decided to cut some subsystem by myself,
> So I spent several days to study the SAMBA 4 WAF build system and now know
the base steps of build.
> but which subsystem can be removed for snmd/nmbd/smbpasswd ?
That is, essentially, your task.  You could compile it under
callcatcher, or use some other symbol dependency tracker to work out
what libraries are linked but not used.

The real problem however is when a binary like smbd links against a
library, a, which uses b.  However often the way that smbd uses a does
not require b, but it remains a useless dependency.  

The classic example of this is also the easiest one to start solving,
which is that smbd links against libndr-standard and libndr-samba-
samba4.  However, most of those libs are not used: sometimes the only
link in is via the ndr_table which lists all our generated IDL by UUID.

A re-structure of this code so that we have one library that is just
what a minimal smbd needs, and other for larger tasks like the client
tools and the AD DC, would be quite handy. 

A starting point would be to disable subsystems for a minimal build,
that simply wouldn't compile the unused elements, followed by code
changes to make other currently 'used' elements that are not strictly
needed for the file server alone become unused, then disabled.  

It isn't easy, but it will be worthwhile.

Andrew Bartlett
-- 
Andrew Bartlett                       http://samba.org/~abartlet/
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba

Andrew Bartlett

2019-Nov-15 02:20 UTC

head link

[Samba] how to reduce binary size of SAMBA 4 for embeded device

On Sun, 2017-08-06 at 17:03 +1200, Andrew Bartlett via samba
wrote:> On Wed, 2017-08-02 at 17:37 +0800, ??? wrote:
> > Hi, Bartlett
> > 
> > I decided to cut some subsystem by myself,
> > So I spent several days to study the SAMBA 4 WAF build system and
> > now know the base steps of build.
> > but which subsystem can be removed for snmd/nmbd/smbpasswd ?
> 
> That is, essentially, your task.  You could compile it under
> callcatcher, or use some other symbol dependency tracker to work out
> what libraries are linked but not used.
> 
> The real problem however is when a binary like smbd links against a
> library, a, which uses b.  However often the way that smbd uses a
> does
> not require b, but it remains a useless dependency.  
> 
> The classic example of this is also the easiest one to start solving,
> which is that smbd links against libndr-standard and libndr-samba-
> samba4.  However, most of those libs are not used: sometimes the only
> link in is via the ndr_table which lists all our generated IDL by
> UUID.
I had a go at this recently, and re-posted the results here:

https://lists.samba.org/archive/samba-technical/2019-November/134539.html

Changing "-O2" to "-Os -s" I got Samba to a 9152kb smbd. 
Still much
more than I know you are hoping for, and I had to cut some important
functionality to make this proof of concept compile, but it shows what
is possible.

Andrew Bartlett
 
-- 
Andrew Bartlett
https://samba.org/~abartlet/
Authentication Developer, Samba Team         https://samba.org
Samba Development and Support, Catalyst IT   
https://catalyst.net.nz/services/samba

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