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Re: Enable linknamespace testing for libdl and libcrypt

On 11/16/2016 11:45 PM, Joseph Myers wrote:
On Wed, 16 Nov 2016, Florian Weimer wrote:

On 11/16/2016 08:06 PM, Joseph Myers wrote:
+linknamespace-libs-XPG3 = $(linknamespace-libs-isoc) \
+			  $(common-objpfx)crypt/libcrypt.a

Does the linknamespace test perform a full link, and fails if it encounters
undefined symbols?

No, it has its own emulation of linker logic, and ignores failure to find
a definition of a symbol (for example, libgcc symbols - it doesn't look
for libgcc.a / libgcc_eh.a, so it won't detect namespace issues there).
(If an undefined symbol breaks namespace rules, that will still result in
a test failure unless whitelisted in, whether or not a
definition of that symbol was found.)

Understood.  Then the linknamespace test fails thusly:

[initial] crypt -> [libcrypt.a(crypt-entry.o)] __md5_crypt -> [libcrypt.a(md5-crypt.o)] NSSLOWHASH_Begin [initial] crypt -> [libcrypt.a(crypt-entry.o)] __md5_crypt -> [libcrypt.a(md5-crypt.o)] NSSLOWHASH_Destroy [initial] crypt -> [libcrypt.a(crypt-entry.o)] __md5_crypt -> [libcrypt.a(md5-crypt.o)] NSSLOWHASH_End [initial] crypt -> [libcrypt.a(crypt-entry.o)] __md5_crypt -> [libcrypt.a(md5-crypt.o)] NSSLOWHASH_NewContext [initial] crypt -> [libcrypt.a(crypt-entry.o)] __md5_crypt -> [libcrypt.a(md5-crypt.o)] NSSLOWHASH_Update [initial] crypt -> [libcrypt.a(crypt-entry.o)] __md5_crypt -> [libcrypt.a(md5-crypt.o)] NSSLOW_Init [initial] crypt -> [libcrypt.a(crypt-entry.o)] __md5_crypt -> [libcrypt.a(md5-crypt.o)] NSSLOW_Shutdown

This is, of course, completely correct and expected. I don't know what to do about it. XFAIL it?

I'm trying to get rid of NSS-based crypt downstream, but it's going to take a while (it's already optional in Fedora).


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