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| author | Sebastian Parborg <darkdefende@gmail.com> | 2021-01-14 19:32:21 +0300 |
|---|---|---|
| committer | Sebastian Parborg <darkdefende@gmail.com> | 2021-01-14 19:32:21 +0300 |
| commit | 406d74769597e318117ad5b3837e7283d9fd2aa5 (patch) | |
| tree | b35b05ac925f7c25723cf919c0356f4df6c03a38 /intern | |
| parent | 9131c697ddda0ad640167d9f52e97bb697e187d0 (diff) | |
Fix automated tests when building with GCC and march=native
When building with more aggressive optimization flags, GCC will add FMA
(Fused Multiply Add) instructions that will slightly alter the floating
point operation results.
This causes some automated tests to fail in blender.
In clang and the intel compiler ffp-contract is set to off per default
it seems from my research. (They do not have the exact same setting,
but the default seems to match the off behavior)
Reviewed By: Brecht
Differential Revision: http://developer.blender.org/D9047
Diffstat (limited to 'intern')
| -rw-r--r-- | intern/cycles/CMakeLists.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/intern/cycles/CMakeLists.txt b/intern/cycles/CMakeLists.txt index b1bb1d3654d..8167576a177 100644 --- a/intern/cycles/CMakeLists.txt +++ b/intern/cycles/CMakeLists.txt @@ -379,6 +379,9 @@ endif() # Subdirectories if(WITH_CYCLES_BLENDER) + # Not needed to make cycles automated tests pass with -march=native. + # However Blender itself needs this flag. + remove_cc_flag("-ffp-contract=off") add_definitions(-DWITH_BLENDER_GUARDEDALLOC) add_subdirectory(blender) endif() |