On 02/10/2011 12:05 PM, Ralf Wildenhues wrote: > Hello Lyre, > > * Lyre wrote on Thu, Feb 10, 2011 at 04:39:41AM CET: >> php-config --configure-options | sed -n >> 's|.*--with-config-file-scan-dir=\([^ ]*\).*|\1|p' >> >> It works on shell, and outputs "/etc/php5/conf.d/" on opensuse. >> >> And I tired it in configure.ac, as following: >> >> PHPCDIR=`php-config --configure-options | sed -n >> 's|.*--with-config-file-scan-dir=\([^ ]*\).*|\1|p'` > >> After subsitution in Makefile, the PHPCDIR is emptyï meanwhile PHPINC get >> the correct result. > > Probably, m4 eat your [ ] as they are also m4 quotes. To safely protect > them from m4, replace them with @<:@ and @:>@, respectively. See "info > Autoconf Quadrigraphs". Oh, thanks for spotting it! Yes, that's exactly what happened, and what I missed as I was reading it. Another option is to add an extra layer of quoting around raw shell code that should not be subject to m4 processing: [ PHPCDIR=`...[^ ]...` ] instead of resorting to quadrigraphs. It has the added benefit that you retain copy-and-paste capabilities between configure.ac and your shell. -- Eric Blake eblake@xxxxxxxxxx +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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