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The script expects each of the symbols that it looks for to
be in one of three sections, which in nm(1) are described as
follows:
T - The symbol is in the text (code) section.
B - The symbol is in the BSS data section. This section
typically contains zero-initialized or uninitialized
data, although the exact behavior is system dependent.
D - The symbol is in the initialized data section.
When building on alpha, however, some of the symbols show up
in one of two additional sections, specifically:
S - The symbol is in an uninitialized or zero-initialized
data section for small objects.
G - The symbol is in an initialized data section for small
objects.
In other words, S is the same as B and G is the same as D,
except with some optimization for small objects that for some
reason is applied on alpha but not on other architectures.
I have confirmed that, for all the symbols that the script
complained about being missing on alpha, the section is the
expected one, that is, symbols that are reported as B on x86
are reported as S on alpha, and symbols that are reported as
D on x86 are reported as G on alpha.
Note that, while the B section doesn't seem to be used at all
on alpha, at least in our case, the D section still is.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
python2 will be end of life by the time of the next
libvirt release. All our supported build targets, including
CentOS7, have a python3 build available.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Commit d30a1ad044 translated the symbol file checker from perl to
python by doing a literal translation in most cases. Unfortunately one
string formatting operation was not really translated into python
leaving users with non-helpful error:
'Symbol $1 is listed twice'
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
As part of a goal to eliminate Perl from libvirt build tools,
rewrite the check-symfile.pl tool in Python.
This was a straight conversion, manually going line-by-line to
change the syntax from Perl to Python. Thus the overall structure
of the file and approach is the same.
Tested-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
