configure & compiler warning cleanups
- configure: Use
LT_INIT
from libtool 2 instead of deprecatedAC_PROG_LIBTOOL
- Add X.Org's standard C warning flags to
AM_CFLAGS
- Revert
"exa: Use exaGetPixmapFirstPixel() instead of devPrivate.ptr"
[fixes-Wbad-function-cast
] - Fix
warning: no previous prototype for ‘SavageGetCopyROP’
- Fix
-Wdeclaration-after-statement
warning inSavagePreInit()
- Use C99 named initializers for
XF86ModReqInfo
inSavagePreInit()
- Fix 5
-Wshadow
warnings