From 185294a0f9a689a231d3d0d8cde1864d4b0bdaa0 Mon Sep 17 00:00:00 2001
From: Jonathan Beck
Date: Thu, 29 Jan 2009 18:35:38 +0100
Subject: Add more warning flags and remove useless libxml2 dependency.

---
 configure.ac           |  4 +++-
 dev/Makefile.am        |  4 ++--
 m4/as-compiler-flag.m4 | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/Makefile.am        |  4 ++--
 4 files changed, 69 insertions(+), 5 deletions(-)
 create mode 100644 m4/as-compiler-flag.m4

diff --git a/configure.ac b/configure.ac
index 87ed8dc..71bab50 100644
--- a/configure.ac
+++ b/configure.ac
@@ -20,7 +20,6 @@ AC_PROG_CC
 AM_PROG_CC_C_O
 
 # Checks for libraries.
-PKG_CHECK_MODULES(libxml2, libxml-2.0 >= 2.6.30)
 PKG_CHECK_MODULES(libusb, libusb >= 0.1.12)
 PKG_CHECK_MODULES(libglib2, glib-2.0 >= 2.14.1)
 PKG_CHECK_MODULES(libgthread2, gthread-2.0 >= 2.14.1)
@@ -66,4 +65,7 @@ if test "$no_debug_code" = true; then
 	AC_DEFINE(STRIP_DEBUG_CODE,1,[Strip debug reporting code])
 fi
 
+AS_COMPILER_FLAGS(GLOBAL_CFLAGS, "-Wall -Wextra -Wmissing-declarations -Wredundant-decls -Wshadow -Wpointer-arith  -Wwrite-strings -Wswitch-default -Wno-unused-parameter")
+AC_SUBST(GLOBAL_CFLAGS)
+
 AC_OUTPUT(Makefile src/Makefile include/Makefile fdi/Makefile dev/Makefile swig/Makefile libiphone-1.0.pc)
diff --git a/dev/Makefile.am b/dev/Makefile.am
index 7ca7e99..f976ccc 100644
--- a/dev/Makefile.am
+++ b/dev/Makefile.am
@@ -1,7 +1,7 @@
 INCLUDES = -I$(top_srcdir)/include
 
-AM_CFLAGS = $(libxml2_CFLAGS) $(libusb_CFLAGS) $(libglib2_CFLAGS) $(libgnutls_CFLAGS) $(libtasn1_CFLAGS) $(libgthread2_CFLAGS) -g
-AM_LDFLAGS = $(libxml2_LIBS) $(libusb_LIBS) $(libglib2_LIBS) $(libgnutls_LIBS) $(libtasn1_LIBS) $(libgthread2_LIBS)
+AM_CFLAGS = $(GLOBAL_CFLAGS) $(libusb_CFLAGS) $(libglib2_CFLAGS) $(libgnutls_CFLAGS) $(libtasn1_CFLAGS) $(libgthread2_CFLAGS) -g
+AM_LDFLAGS = $(libusb_LIBS) $(libglib2_LIBS) $(libgnutls_LIBS) $(libtasn1_LIBS) $(libgthread2_LIBS)
 
 bin_PROGRAMS = iphoneclient lckd-client afccheck msyncclient
 
diff --git a/m4/as-compiler-flag.m4 b/m4/as-compiler-flag.m4
new file mode 100644
index 0000000..0f660cf
--- /dev/null
+++ b/m4/as-compiler-flag.m4
@@ -0,0 +1,62 @@
+dnl as-compiler-flag.m4 0.1.0
+
+dnl autostars m4 macro for detection of compiler flags
+
+dnl David Schleef <ds@schleef.org>
+
+dnl $Id: as-compiler-flag.m4,v 1.1 2005/12/15 23:35:19 ds Exp $
+
+dnl AS_COMPILER_FLAG(CFLAGS, ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED])
+dnl Tries to compile with the given CFLAGS.
+dnl Runs ACTION-IF-ACCEPTED if the compiler can compile with the flags,
+dnl and ACTION-IF-NOT-ACCEPTED otherwise.
+
+AC_DEFUN([AS_COMPILER_FLAG],
+[
+  AC_MSG_CHECKING([to see if compiler understands $1])
+
+  save_CFLAGS="$CFLAGS"
+  CFLAGS="$CFLAGS $1"
+
+  AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no])
+  CFLAGS="$save_CFLAGS"
+
+  if test "X$flag_ok" = Xyes ; then
+    m4_ifvaln([$2],[$2])
+    true
+  else
+    m4_ifvaln([$3],[$3])
+    true
+  fi
+  AC_MSG_RESULT([$flag_ok])
+])
+
+dnl AS_COMPILER_FLAGS(VAR, FLAGS)
+dnl Tries to compile with the given CFLAGS.
+
+AC_DEFUN([AS_COMPILER_FLAGS],
+[
+  list=$2
+  flags_supported=""
+  flags_unsupported=""
+  AC_MSG_CHECKING([for supported compiler flags])
+  for each in $list
+  do
+    save_CFLAGS="$CFLAGS"
+    CFLAGS="$CFLAGS $each"
+    AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no])
+    CFLAGS="$save_CFLAGS"
+
+    if test "X$flag_ok" = Xyes ; then
+      flags_supported="$flags_supported $each"
+    else
+      flags_unsupported="$flags_unsupported $each"
+    fi
+  done
+  AC_MSG_RESULT([$flags_supported])
+  if test "X$flags_unsupported" != X ; then
+    AC_MSG_WARN([unsupported compiler flags: $flags_unsupported])
+  fi
+  $1="$$1 $flags_supported"
+])
+
diff --git a/src/Makefile.am b/src/Makefile.am
index 1b97f45..039632f 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,7 +1,7 @@
 INCLUDES = -I$(top_srcdir)/include
 
-AM_CFLAGS = $(libxml2_CFLAGS) $(libusb_CFLAGS) $(libglib2_CFLAGS) $(libgnutls_CFLAGS) $(libtasn1_CFLAGS) $(libgthread2_CFLAGS) $(libplist_CFLAGS) -g -Wall
-AM_LDFLAGS = $(libxml2_LIBS) $(libusb_LIBS) $(libglib2_LIBS) $(libgnutls_LIBS) $(libtasn1_LIBS) $(libgthread2_LIBS) $(libplist_LIBS)
+AM_CFLAGS = $(GLOBAL_CFLAGS) $(libusb_CFLAGS) $(libglib2_CFLAGS) $(libgnutls_CFLAGS) $(libtasn1_CFLAGS) $(libgthread2_CFLAGS) $(libplist_CFLAGS) -g
+AM_LDFLAGS = $(libusb_LIBS) $(libglib2_LIBS) $(libgnutls_LIBS) $(libtasn1_LIBS) $(libgthread2_LIBS) $(libplist_LIBS)
 
 bin_PROGRAMS = libiphone-initconf
 
-- 
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