autogen.sh: Drop obsolete MinGW/MSYS items. For Windows builds (which require MinGW-w64) we currently support: - cross-builds using MXE (mxe.cc) and possibly other cross-compile setups - native builds using MSYS2 (sf.net/projects/msys2/) Neither of those require explicitly specifying ACLOCAL_DIR.
sr/srd/cli: Fix compiling with Homebrew. Add ACLOCAL_DIR setting and AM_PROG_AR macro for compiling with Homebrew under Mac OS X. Applies essentially the same change to {libsigrok,libsigrokdecode,sigrok-cli}/{autogen.sh,configure.ac} It may be that the same fix is needed for the other autogen.sh and/or configure.ac files, but that hasn't been tested and therefore not in this commit.