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clang: make code submissive and debuggable

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anna 2021-09-29 04:54:19 +02:00
parent 5c0fa715a4
commit d4ee4e5953
Signed by: fef
GPG key ID: EC22E476DC2D3D84
1 changed files with 9 additions and 2 deletions
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11
CMakeLists.txt
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@ -23,8 +23,15 @@ include("arch/${ARCH}/config/toolchain.cmake")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ffreestanding")
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -D_ASM_SOURCE")
if(DEBUG)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Og -ggdb")
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -Og -ggdb")
# -Og on gcc optimizes for the best debugging experience, but apparently this
# is treated the same as -O1 on clang for some reason. The LLVM manual says
# you're supposed to use -O0 in order to get the most submissive and debuggable
# code instead:
# <https://clang.llvm.org/docs/CommandGuide/clang.html#code-generation-options>
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O0 -ggdb")
# i don't think -O0 does anything for assembly code, but it can't hurt to
# have it in there just in case (somebody check on this at some point plz)
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -O0 -ggdb")
else()
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2")
endif()