liz/rawTherapee
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Set -ffp-contract=off compiler flag for GCC >= 11

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Replace the previous workaround of setting -fno-tree-loop-vectorize for
a GCC optimization bug.

(#6384)
This commit is contained in:
Lawrence Lee 2022-09-17 23:13:51 -07:00 committed by Lawrence37
parent 2ce5b827c5
commit 2924128311
1 changed files with 5 additions and 1 deletions
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6
CMakeLists.txt
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@ -45,10 +45,14 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION
endif()
# Warning for GCC vectorization issues, which causes problems #5749 and #6384:
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER "10.0" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS "10.2") OR (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "11.0")))
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER "10.0" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS "10.2")
message(STATUS "WARNING: gcc ${CMAKE_CXX_COMPILER_VERSION} is known to miscompile RawTherapee when using -ftree-loop-vectorize, forcing the option to be off")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-tree-loop-vectorize")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-tree-loop-vectorize")
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "11.0")
message(STATUS "WARNING: gcc ${CMAKE_CXX_COMPILER_VERSION} is known to miscompile RawTherapee when using --ffp-contract=fast, forcing the option to be off")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ffp-contract=off")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ffp-contract=off")
endif()
# We might want to build using the old C++ ABI, even when using a new GCC