configure & compiler warning cleanups
- configure: Use
LT_INIT
from libtool 2 instead of deprecatedAC_PROG_LIBTOOL
- Fix
-Wdiscarded-qualifiers
warning in init_dac_flags() - Add X.Org's standard C warning flags to
AM_CFLAGS
- Quiet
warning: redundant redeclaration of ‘timingsafe_memcmp’
- Fix
warning: no previous prototype for ‘FFB_InitDGA’ [-Wmissing-prototypes]
- Fix
warning: no previous prototype for ‘FFBi2cInit’ [-Wmissing-prototypes]
- Fix
-Wunused-function
warnings in ffb_ddc.c - Fix
warning: variable ‘pFfb’ set but not used [-Wunused-but-set-variable]