CODEWITHSUNDEEP
linuxg++build-time
Frank Puck
Frank Puck

Reputation: 539

How can one reduce the number of attempts of g++ to find some particular include file?

I was using

strace -eopen -f g++ ...

in order to see what is happening. I found the number of calls to open() were 13244 with 10880 failing. So I looked at the output and looked at one particular file from boost (noncopyable.hpp) and found that the number of calls to open this file was 18 with the last succeeding.

What are some methods for reducing this?

And yes -- this was supposed to be using precompiled headers and the matching generated file is being opened (.gch).

BTW -- the number of usages of the -I option is 3.

Upvotes: 0

Views: 31

Answers (1)

Frank Puck
Frank Puck

Reputation: 539

One can use the alternative option

-iquote directory

instead of

-I directory

The former applies only to include statements with the filename in double quotes. This reduced the number of failed attempts to find include files from boost dramatically.

Upvotes: 0

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