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piotr5
Tux's lil' helper
Joined: 14 Dec 2012
Posts: 121
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 Posted: Sat Jul 06, 2024 4:06 pm Post subject: clang failed to compile with gcc arguments |
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distcc asks us to figure out what -march=native is doing and give those arguments. I did do that for gcc and wrote the result into CFLAGS in make.conf.
now however the package dev-libs/rocm-device-libs-6.1.1::gentoo failed (configure phase) because clang doesn't support a command-line option:
| Code: | clang: error: unknown argument '-mabm'; did you mean '-marm'?
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is there a way to provide different CFLAGS for clang than for gcc? or was that the fault of the package to make use of CFLAGS in the first place?
needless to say, solution is to disable distcc and compile with -march=native at least for this package. strange though I never experienced this problem before... |
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sedorox
Apprentice
Joined: 13 Feb 2004
Posts: 207
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| Posted: Sat Jul 13, 2024 12:59 am Post subject: |
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I had been fighting this myself, but didn't spend time on it.
Finally did, this is how I got around it:
/etc/portage/package.env/rocm-device-libs:
| Code: |
dev-libs/rocm-device-libs dev-libs/rocm-device-libs.conf |
Then /etc/portage/env/dev-libs/rocm-device-libs.conf
| Code: |
COMMON_FLAGS="-O2 -march=znver2 -pipe
-mmmx -msse -msse2 -msse3 -mssse3 -msse4a -mcx16 -msahf -mmovbe -maes -msha
-mpclmul -mpopcnt -mfma -mbmi -mbmi2 -mwbnoinvd -mavx -mavx2 -msse4.2
-msse4.1 -mlzcnt -mrdrnd -mf16c -mfsgsbase -mrdseed -mprfchw -madx -mfxsr
-mxsave -mxsaveopt -mclflushopt -mxsavec -mxsaves -mclwb -mmwaitx -mclzero
-mrdpid --param l1-cache-size=768 --param l1-cache-line-size=768
--param l2-cache-size=6144 -mtune=znver2 -fforce-addr -fomit-frame-pointer"
CFLAGS="${COMMON_FLAGS}"
CXXFLAGS="${COMMON_FLAGS} -D_FILE_OFFSET_BITS=64 -fPIC"
FCFLAGS="${COMMON_FLAGS}"
FFLAGS="${COMMON_FLAGS}"
LDFLAGS="${LDFLAGS} -Wl,--sort-common"
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Which for rocm-device-libs.conf, it's the same as make.conf, but I removed -mabm. I think it was added at some point when I tried to get the specific flags that march=znver2 would bring in.
After this, I got a clean compile.
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