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AX_CC_MAXOPT always overrides CFLAGS #4

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mreineck opened this issue Oct 12, 2021 · 0 comments
Open

AX_CC_MAXOPT always overrides CFLAGS #4

mreineck opened this issue Oct 12, 2021 · 0 comments

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@mreineck
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Maybe I'm doing something wrong, but even when I define CFLAGS before invoking configure, the CFLAGS used for compiling the benchees are always those determined by AX_CC_MAXOPT. The only way I manage to "fix" this is by commenting out AX_CC_MAXOPT in configure.ac and re-running autoreconf etc.

The performance penalty caused by the automatically chosen flags is quite dramatic; more than a factor of 2 for some transforms.

Is there some subtlety I'm missing?
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@mreineck