On Thu, 2006-09-21 at 21:36 +0800, Tzu-Chien Chiu wrote: > Thank you. You're right. It has nothing to do with multilib. > > I've read configure.ac and Makefile.am of texinfo. I am not familiar with texinfo's sources
> Here is how it works. > When cross-compiling, the same configure script is run twice for all > sub-directories of source directory. Makefile.am, however, selectively only > builds some or all of these sub-directories depending upon if set TOOLS_ONLY > is set by the configure script. When building native tools, the variables > CC, AR, and RANLIB copied from the their BUILD_* environment variable > counterparts. > > The users have to manually set BUILD_CC, BUILD_AR, BUILD_RANLIB before > running 'configure', right? I thought there would be AC_PROG_*-like macros > for these? This is not the standard autoconf way to do it - I guess, it's the way texinfo's authors implemented it. Normally with autoconf/automake, you need 2 different build-directories, each individually being configured for one host, because autoconf/automake only support one host at a time per configure script. To be able to support this, you'll need to implement a toptevel configure script, which configures sub-directories this way. This is the way, most complex packages handle multiple host building. Ralf
