I did some optimization testing by bootstrapping with "--with-arch=native --with-tune=native" on an AMD Threadripper system, that's "znver2".
I got a lot of additional testsuite failures especially in the jit testsuite. The log shows a lot of failures of the following form: libgccjit.so: error: bad value 'native' for '-march=' switch libgccjit.so: note: valid arguments to '-march=' switch are: nocona core2 nehalem corei7 westmere sandybridge corei7-avx ivybridge core-avx-i haswell core-avx2 broadwell skylake skylake-avx512 cannonlake icelake-client rocketlake icelake-server cascadelake tigerlake cooperlake sapphirerapids emeraldrapids alderlake raptorlake meteorlake graniterapids bonnell atom silvermont slm goldmont goldmont-plus tremont sierraforest grandridge knl knm x86-64 x86-64-v2 x86-64-v3 x86-64-v4 eden-x2 nano nano-1000 nano-2000 nano-3000 nano-x2 eden-x4 nano-x4 lujiazui k8 k8-sse3 opteron opteron-sse3 athlon64 athlon64-sse3 athlon-fx amdfam10 barcelona bdver1 bdver2 bdver3 bdver4 znver1 znver2 znver3 znver4 btver1 btver2 native DISCARDED exp6 : libgccjit.so: error: bad value 'native' for '-march=' switch DISCARDED exp6 : libgccjit.so: note: valid arguments to '-march=' switch are: nocona core2 nehalem corei7 westmere sandybridge corei7-avx ivybridge core-avx-i haswell core-avx2 broadwell skylake skylake-avx512 cannonlake icelake-client rocketlake icelake-server cascadelake tigerlake cooperlake sapphirerapids emeraldrapids alderlake raptorlake meteorlake graniterapids bonnell atom silvermont slm goldmont goldmont-plus tremont sierraforest grandridge knl knm x86-64 x86-64-v2 x86-64-v3 x86-64-v4 eden-x2 nano nano-1000 nano-2000 nano-3000 nano-x2 eden-x4 nano-x4 lujiazui k8 k8-sse3 opteron opteron-sse3 athlon64 athlon64-sse3 athlon-fx amdfam10 barcelona bdver1 bdver2 bdver3 bdver4 znver1 znver2 znver3 znver4 btver1 btver2 native Assembler messages: Error: can't open /tmp/libgccjit-uacKEw/fake.s for reading: No such file or directory DISCARDED exp6 : Assembler messages: DISCARDED exp6 : Error: can't open /tmp/libgccjit-uacKEw/fake.s for reading: No such file or directory libgccjit.so: error: error invoking gcc driver DISCARDED exp6 : libgccjit.so: error: error invoking gcc driver So, the "-march" switch in libgccjit.so is wrong! I can open a PR if neccessary. Rainer
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