[Libguestfs] [hivex] OS X: Augment pkg-config search path

Hello all, I found OS X still has one remaining issue in the autotools. OS X does not include pkg-config by default, and whatever mechanism installs it places pkg.m4 in some location among: /opt/local/share/aclocal/pkg.m4 /usr/local/share/aclocal/pkg.m4 PKG_CHECK_MODULES isn't defined if pkg.m4 isn't in /usr/share/aclocal, so ./configure dies without augmenting aclocal's search path. My question: What is the proper way to augment this path? I see two options available, one at the top of hivex/Makefile.am: ACLOCAL_AMFLAGS = -I m4 -I /opt/local/share/aclocal And one at the bottom of hivex/bootstrap: AUTOPOINT=true LIBTOOLIZE=true autoreconf --verbose -I /opt/local/share/aclocal --install I just hard-coded one path into those example lines, as I'm simply not sure what the PATH variable I should use is. aclocal dies if a non-existent path component is passed with -I. If I understand correctly, PKG_CONFIG_PATH doesn't appear to be used for finding the base pkg-config macros. I can somewhat find the path in bootstrap with this clunky line: pkgm4dir=$(test -f /opt/local/share/aclocal/pkg.m4 && dirname /opt/local/share/aclocal/pkg.m4)||$(test -f /usr/local/share/aclocal/pkg.m4 && dirname /usr/local/share/aclocal/pkg.m4)||$(test -f /usr/share/aclocal/pkg.m4 && dirname /usr/share/aclocal/pkg.m4) But I suspect there's a better way. Can someone help with what this would be? --Alex