ref: d4028fff102a0fd1cd3d522b8483e3b5a2a7254a
dir: /test/asm/deprecated-pi.err/
warning: deprecated-pi.asm(2): [-Wobsolete]
`_PI` is deprecated; use 3.14159
ERROR: deprecated-pi.asm(3):
Built-in symbol '_PI' cannot be purged
error: Assembly aborted (1 errors)!