I haven't seen this warning in any AOSP code, but some of our code is
using this header differently than the rest of the build system, and
hits this warning-turned-error:
error: "__USE_MINGW_ANSI_STDIO" is not defined [-Werror=undef]
Change-Id: I3c5a91f107af8bf6078e06f2ce326c5466349b79
With __USE_MINGW_ANSI_STDIO mingw compiler uses its own replacement
printf*/scanf* libraries instead of Microsoft's ones which aren't always
C99 compatible. Declare "archetype" of attribute format to gnu_printf
because the default "printf" in mingw follows MS standard.
One result is that "%z" (a gnu-extension) is accepted w/o warning by
mingw compiler
Change-Id: I3e92f34e2a1e8d664b4f1f55d450f7c2790671f3
Dan Willemsen