[build] Honor --disable-symvers (PR bootstrap/48135)

[Rainer Orth]

Paolo Bonzini <bonzini@gnu.org> writes:

> On 03/21/2011 12:34 PM, Rainer Orth wrote:
>> Prompted by PR bootstrap/48135, I found that only libstdc++-v3 honors
>> --disable-symvers.  The following patch corrects this, but also notices
>> again the mess we've created by having at least 3 different sets of
>> checks for symbol versioning, each with its own variations ;-(  But this
>> is not the time to correct this (yet).
>>
>> Tested by a i386-pc-solaris2.11 bootstrap and checking that all
>> libraries were still versioned by default.  Then I removed and
>> configured/built the affected libraries again and checked that
>> versioning was correctly disabled.
>>
>> The patch below was created with -w to hide indentation changes.
>>
>> Ok for mainline now and perhaps 4.6.1?
>
> Ok for 4.7, RMs should decide about 4.6.1.

Applied, thanks.  It would be nice to get into 4.6 (even 4.6.1) since
otherwise install.texi which claims --disable-symvers as a workaround
lies :-)

	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University