Add doxygen support

Makefile.am

@@ -1,2 +1,6 @@
 SUBDIRS = src . tests
+CLEANFILES = 
 #ACLOCAL_AMFLAGS = -I m4
+if HAVE_DOXYGEN
+SUBDIRS += docs
+endif

configure.ac

@@ -32,6 +32,20 @@ AM_PROG_CC_C_O
 AC_PROG_MAKE_SET
 AC_PROG_RANLIB
 
+AC_CHECK_PROGS([DOXYGEN], [doxygen])
+if test -z "$DOXYGEN";
+	then AC_MSG_WARN([Doxygen not found - continuing without Doxygen support])
+fi
+
+AC_CHECK_PROGS([DOXYGEN], [doxygen])
+if test -z "$DOXYGEN";
+	then AC_MSG_WARN([Doxygen not found - continuing without Doxygen support])
+fi
+AC_CHECK_PROGS([GIT], [git])
+if test -z "$DOXYGEN";
+	then AC_MSG_WARN([git not found - continuing without Doxygen support])
+fi
+
 # Checks for libraries.
 AC_SEARCH_LIBS([dlopen], [dl dld], [], [
 	AC_MSG_ERROR([unable to find the dlopen() function])
@@ -71,4 +85,8 @@ AC_CONFIG_FILES([Makefile
 		src/Makefile
 		tests/Makefile])
 
+AM_CONDITIONAL([HAVE_DOXYGEN],
+[test -n "$DOXYGEN"])AM_COND_IF([HAVE_DOXYGEN], [AC_CONFIG_FILES([docs/Doxyfile
+docs/Makefile])])
+
 AC_OUTPUT

docs/Makefile.am

@@ -0,0 +1,19 @@
+if HAVE_DOXYGEN
+CLEANFILES = doxyfile.stamp
+directory = $(top_srcdir)/docs/man/man3/
+dist_man_MANS = $(directory)/man_page_1.3 $(directory)/man_page_2.3
+
+$(directory)/man_page_1.3: doxyfile.stamp
+$(directory)/man_page_2.3: doxyfile.stamp
+
+doxyfile.stamp:
+	$(DOXYGEN) Doxyfile
+	echo Timestamp > doxyfile.stamp
+
+
+all-local: doxyfile.stamp doc
+doc: doxyfile.stamp
+
+clean-local:
+	-rm -rf $(top_srcdir)/docs/html $(top_srcdir)/docs/man $(top_srcdir)/docs/doxygen_sqlite3.db
+endif

tests/ttail_init_check.c

@@ -37,6 +37,7 @@ START_TEST (test_init_nonexist_logfilename)
 {
 	char *fname;
 	int ret;
+	/** @todo replace by mkstemp */
 	fname = tempnam(NULL, "ttail_check");
 
 	ret = ttail_add_logfile(ttail, fname);