Hello,

Reference:  BLFS Book, v2015-01-22

In the Firefox source,

'./configure --help' reads

 "--enable-optimize=[OPT]  Specify compiler optimization flags [OPT=-O]"

 which, the way I interpret it, implies the build uses O as the default.

In Note (... gcc versions ranging from 4.8 to 4.9.1 ...), the command

 test $(uname -m) = "i686" && sed -i 's/enable-optimize/&=-O2/' mozconfig \
  || true

seem to force optimization to O2 (again, if I interpret it correctly).

O2 is to optimize even more (i.e., higher level) than O (= O1)
which appears to contradict the statement:

"... [please] reduce the level of optimization with:
 [the above command]".

Am I wrong (again)?

Thanks,
-- Alex
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