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added -ffp-contract=off and took out -ffast-math

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took out `-ffast-math` because according to the gcc optimize documentation it could bring:
> incorrect output for programs that depend on an exact implementation of IEEE or ISO rules/specifications for math functions.
https://gcc.gnu.org/onlinedocs/gcc-11.1.0/gcc/Optimize-Options.html#index-ffast-math

and put in `-ffp-contract=off` because at optimization levels of `-O2` and higher the operations of multiply and summing  are not handled correctly and give wrong values, breaking in our case the Cross product of the vector math:
https://gcc.gnu.org/onlinedocs/gcc-11.1.0/gcc/Optimize-Options.html#index-ffp-contract
This commit is contained in:
Biel Bestué de Luna 2021-06-01 14:24:08 +02:00 committed by GitHub
parent 4ce0f587cb
commit fb31e404a4
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 3 deletions
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6
neo/CMakeLists.txt
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@ -192,9 +192,9 @@ if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -ggdb -D_DEBUG -O0")
#set(CMAKE_C_FLAGS_DEBUGALL "${CMAKE_C_FLAGS_DEBUGALL} -g -ggdb -D_DEBUG")
#set(CMAKE_C_FLAGS_PROFILE "${CMAKE_C_FLAGS_PROFILE} -g -ggdb -D_DEBUG -O1 -fno-omit-frame-pointer")
set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O3 -ffast-math -fno-unsafe-math-optimizations -fomit-frame-pointer")
set(CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} -g -O3 -ffast-math -fno-unsafe-math-optimizations -fomit-frame-pointer")
set(CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL} -Os -ffast-math -fno-unsafe-math-optimizations -fomit-frame-pointer")
set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O3 -ffp-contract=off -fno-unsafe-math-optimizations -fomit-frame-pointer")
set(CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} -g -O3 -ffp-contract=off -fno-unsafe-math-optimizations -fomit-frame-pointer")
set(CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL} -Os -ffp-contract=off -fno-unsafe-math-optimizations -fomit-frame-pointer")
set(CMAKE_CXX_FLAGS_DEBUG ${CMAKE_C_FLAGS_DEBUG})
#set(CMAKE_CXX_FLAGS_DEBUGALL ${CMAKE_C_FLAGS_DEBUGALL})