irqbalance: Misc build enhancements

- Remove AC_CANONICAL_TARGET macro from configure to allow easier cross
  compilation

- Add private implementation of called glib2 functions so that irqbalance can be
  built on systems not supporting a sufficiently recent version of glib2

- Add --without-glib2 configure option to support explicit selection of internal
  glib2 function definitions, overriding automatic selection.

Signed-off-by: Serj Kalichev <serj.kalichev@gmail.com>
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>

.gitignore

@@ -1,6 +1,9 @@
+*.a
 *.o
 *~
 
+.deps
+
 *.diff
 *.patch
 *.orig
@@ -9,6 +12,8 @@
 /INSTALL
 /Makefile
 /Makefile.in
+*/Makefile
+*/Makefile.in
 /aclocal.m4
 /autom4te.cache
 /compile
@@ -25,6 +30,7 @@
 /m4
 /missing
 /stamp-h1
+/depcomp
 
 /irqbalance
 irqbalance-*.tar.*

Makefile.am

@@ -25,7 +25,7 @@ ACLOCAL_AMFLAGS = -I m4
 EXTRA_DIST = README INSTALL COPYING autogen.sh m4/cap-ng.m4 misc/irqbalance.service
  
 INCLUDES = -I${top_srcdir} 
-LIBS = $(CAPNG_LDADD) $(GLIB_LIBS) @LIBS@
+LIBS = $(CAPNG_LDADD) @LIBS@
 AM_CFLAGS = $(GLIB_CFLAGS)
 AM_CPPFLAGS = -W -Wall -Wshadow -Wformat -Wundef -D_GNU_SOURCE
 noinst_HEADERS = bitmap.h constants.h cpumask.h irqbalance.h non-atomic.h \
@@ -33,6 +33,7 @@ noinst_HEADERS = bitmap.h constants.h cpumask.h irqbalance.h non-atomic.h \
 sbin_PROGRAMS = irqbalance
 irqbalance_SOURCES = activate.c bitmap.c classify.c cputree.c irqbalance.c \
 	irqlist.c numa.c placement.c powermode.c procinterrupts.c
+irqbalance_LDADD = $(CAPNG_LDADD) $(GLIB_LIBS)
 dist_man_MANS = irqbalance.1
 
 CONFIG_CLEAN_FILES = debug*.list config/*
@@ -40,3 +41,4 @@ clean-generic:
 	rm -rf autom4te*.cache 
 	rm -f *.rej *.orig *~
 
+SUBDIRS = $(GLIB_SUBDIR)

configure.ac

@@ -36,7 +36,6 @@ AM_CONFIG_HEADER(config.h)
 echo Configuring irqbalance $VERSION
 
 AC_CONFIG_MACRO_DIR([m4])
-AC_CANONICAL_TARGET
 AM_INIT_AUTOMAKE
 AM_PROG_LIBTOOL
 AC_SUBST(LIBTOOL_DEPS)
@@ -70,10 +69,39 @@ AC_C_CONST
 AC_C_INLINE
 AM_PROG_CC_C_O
 
-PKG_CHECK_MODULES([GLIB], [glib-2.0 >= 2.28])
+AC_ARG_WITH([glib2],
+  [AS_HELP_STRING([--without-glib2],
+    [Don't use system glib2 library. Use local implementation instead.])],
+  [],
+  [with_glib2=check])
+
+local_glib2=
+AS_IF(
+  [test "x$with_glib2" = xyes],
+  [PKG_CHECK_MODULES([GLIB], [glib-2.0 >= 2.28])],
+  
+  [test "x$with_glib2" = xno],
+  [local_glib2="yes"],
+
+  [PKG_CHECK_MODULES([GLIB], [glib-2.0 >= 2.28], [], [local_glib2="yes"])]
+)
+
+AS_IF(
+  [test "x$local_glib2" = xyes],
+  [
+  GLIB_CFLAGS=-I./glib-local
+  GLIB_LIBS=glib-local/libglib.a
+  GLIB_SUBDIR=glib-local
+  AC_SUBST(GLIB_CFLAGS)
+  AC_SUBST(GLIB_LIBS)
+  AC_SUBST(GLIB_SUBDIR)
+  AC_MSG_WARN(Using locale implementation of GList functions)
+  ]
+)
+
 LIBCAP_NG_PATH
 
-AC_OUTPUT(Makefile)
+AC_OUTPUT(Makefile glib-local/Makefile)
 
 AC_MSG_NOTICE()
 AC_MSG_NOTICE([irqbalance Version:     $VERSION])

irqbalance.c

@@ -27,6 +27,7 @@
 #include <syslog.h>
 #include <unistd.h>
 #include <signal.h>
+#include <time.h>
 #ifdef HAVE_GETOPT_LONG 
 #include <getopt.h>
 #endif

irqbalance.h

@@ -9,6 +9,7 @@
 #include <stdint.h>
 #include <glib.h>
 #include <syslog.h>
+#include <limits.h>
 
 #include "types.h"
 #ifdef HAVE_NUMA_H