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sipa commented at 9:36 am on November 2, 2014: contributor@theuni it seems -O3 performs significantly better (at least on my system) compared to -O2. Is there a way to make that default?
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gmaxwell commented at 4:07 am on November 23, 2014: contributor
Sure, after AC_INIT but before AC_PROG_CC add a
0if test -z $CFLAGS; then 1 CFLAGS='-O3 -g' 2fi
Prog_CC will only set the default CFLAGS if they’re not already set.
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theuni commented at 6:12 pm on November 24, 2014: contributorNote that it may be worth checking to see if there’s any major feature (or handful) enabled by -O3 that accounts for a majority of the performance boost. If so, we could just enable those and leave the -O alone. Obvious ones to try would include: -ftree-vectorize, -finline-functions
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dcousens commented at 2:48 am on April 16, 2015: contributorSince https://github.com/bitcoin/secp256k1/pull/146 was merged, close this?
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gmaxwell closed this on Apr 16, 2015
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