Add LOGFILE as a define at compile time for pacman

It has always been a bit odd that logfile had to be specified in the config
file, but no other paths did. Add LOGFILE as a preprocessor definition, and
make a call to alpm_option_set_logfile() to set the default location so no
logfile parameter is necessary in pacman.conf.

Signed-off-by: Dan McGee <dan@archlinux.org>

src/pacman/Makefile.am

@@ -2,6 +2,7 @@
 conffile  = ${sysconfdir}/pacman.conf
 dbpath    = ${localstatedir}/lib/pacman/
 cachedir  = ${localstatedir}/cache/pacman/pkg/
+logfile   = ${localstatedir}/log/pacman.log
 
 bin_PROGRAMS = pacman
 
@@ -14,6 +15,7 @@ DEFS = -DLOCALEDIR=\"@localedir@\" \
        -DROOTDIR=\"$(ROOTDIR)\" \
        -DDBPATH=\"$(dbpath)\" \
        -DCACHEDIR=\"$(cachedir)\" \
+       -DLOGFILE=\"$(logfile)\" \
        @DEFS@
 INCLUDES = -I$(top_srcdir)/lib/libalpm
 

src/pacman/pacman.c

@@ -776,9 +776,10 @@ int main(int argc, char *argv[])
 	/* Setup logging as soon as possible, to print out maximum debugging info */
 	alpm_option_set_logcb(cb_log);
 	alpm_option_set_dlcb(cb_dl_progress);
-	/* define root and dbpath to reasonable defaults */
+	/* define paths to reasonable defaults */
 	alpm_option_set_root(ROOTDIR);
 	alpm_option_set_dbpath(DBPATH);
+	alpm_option_set_logfile(LOGFILE);
 
 	/* Priority of options:
 	 * 1. command line