syslog support; bitwise logior and logand functions become variadic.

* Makefile: Use -iquote to restrict our #include search paths from being
processed for #include <...>.  Add syslog.o to OBJS-y if have_syslog is y.

* configure (have_syslog): New variable, set by detecting syslog API.

* eval.c (eval_init): logand and logior registrations changed to
go to variadic versions. New syslog variables and functions registered.

* lib.c (logandv, logiorv): New functions.

* lib.h (logandv, logiorv): Declared.

* txr.c (main): Call syslog_init.

* syslog.c: New file.

* syslog.h: New file.

1 files changed, 27 insertions, 0 deletions

diff --git a/configure b/configure
index 1e7bd517..44b5ed3b 100755
--- a/configure
+++ b/configure
@@ -100,6 +100,7 @@ have_quilt=
 have_patch=
 have_unistd=
 have_timegm=
+have_syslog=
 need_svid_source=
 need_bsd_source=
 
@@ -573,6 +574,9 @@ compiler_prefix := $compiler_prefix
 # prefix for non-compiler toolchain commands
 tool_prefix := $tool_prefix
 
+# do we compile in syslog support?
+have_syslog := $have_syslog
+
 # do we compile in debug support?
 debug_support := $debug_support
 
@@ -1406,6 +1410,29 @@ else
   have_unistd=y
 fi
 
+printf "Checking for syslog ... "
+
+cat > conftest.c <<!
+#include <syslog.h>
+
+int main(void)
+{
+  openlog("foo", LOG_CONS, LOG_DAEMON);
+  syslog(LOG_EMERG, "bar %d\n", 3);
+  setlogmask(0);
+  closelog();
+  return 0;
+}
+!
+rm -f conftest
+if ! $make conftest > conftest.err 2>&1 || ! [ -x conftest ] ; then
+  printf "no\n"
+else
+  printf "yes\n"
+  printf "#define HAVE_SYSLOG 1\n" >> config.h
+  have_syslog=y
+fi
+
 #
 # Dependent variables
 #