[cfe-users] thinlto and c++ static initialization analysis

[Jerry Scharf via cfe-users]

I am looking at trying out thinlto on our large c++ programs. We have 
had to do a bunch of careful things to make sure things get linked in 
the right order to get the static initialization to work right.


Two questions:

Will thinlto honor the command line ordering of files that we set?

In theory, with lto one could build the dependency graph of 
initializations and guarantee the correct ordering. Has anyone worked on 
this and are there any plans for this in the future?


thanks in advance,

jerry


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[cfe-users] dumb question about record-command-line

[Jerry Scharf via cfe-users]

Hi,

I have an exceeding dumb question.

If I turn on -frecord-command-line, how do I view it in the object 
files, libraries and executables? No matter what I incant to google, it 
only wants to tell me what the command line arguments are.


thanks in advance,

jerry


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Re: [cfe-users] dumb question about record-command-line

[Jerry Scharf via cfe-users]

for anyone who happens upon this, the incantation is

llvm-readobj -p .GCC.command.line filename

(you can use llvm-readelf or readelf with the same args as well)

jerry

On 11/19/19 11:39 AM, David Blaikie wrote:
Depends on your platform, but probably in some section or another in 
the object/executable. Try running objdump (or llvm-objdump) -h on the 
object or executable with/without the switch and see which new section 
shows up. Then you can use objdump -s (I think it's -s, check the man 
page, etc) to dump the contents of that section.

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