c-ares's --enable-curldebug configure option decoupled from c-ares's --enable-debug

ares/CHANGES

   Changelog for the c-ares project
 
+* May 26 2009 (Yang Tse)
+- Added --enable-curldebug configure option to enable and disable building
+  with the low-level curl debug memory tracking 'feature' to allow decoupled
+  setting from --enable-debug, allowing again to build c-ares independently
+  out of the CVS tree.
+
 * May 19 2009 (Yang Tse)
 - Introduced ares_library_init() and ares_library_cleanup() functions.
 

ares/Makefile.am

@@ -14,11 +14,13 @@ ACLOCAL_AMFLAGS = -I m4
 # libcurl, but we do this anyway for convenience.
 #
 # $(top_builddir)/../include is for libcurl's generated curl/curlbuild.h file
+# $(top_srcdir)/../include is for libcurl's external include files
 # $(top_builddir) is for c-ares's generated config.h file
 # $(top_srcdir) is for c-ares's lib/setup.h and other "c-ares-private" files
 
 if CURLDEBUG
 INCLUDES = -I$(top_builddir)/../include \
+           -I$(top_srcdir)/../include   \
            -I$(top_builddir)            \
            -I$(top_srcdir)
 else
@@ -33,7 +35,7 @@ man_MANS = $(MANPAGES)
 MSVCFILES = vc/vc.dsw vc/acountry/acountry.dsp vc/adig/adig.dsp \
  vc/ahost/ahost.dsp vc/areslib/areslib.dsp vc/areslib/areslib.dsw
 
-if DEBUGBUILD
+if CURLDEBUG
 PROGS =
 else
 PROGS = ahost adig acountry

ares/RELEASE-NOTES

@@ -8,6 +8,7 @@ Changed:
    either AF_INET6 or AF_INET
  o a build-time configured ares_socklen_t is now used instead of socklen_t
  o new ares_library_init() and ares_library_cleanup() functions
+ o new --enable-curldebug configure option
 
 Fixed:
 

ares/configure.ac

@@ -13,6 +13,7 @@ AM_MAINTAINER_MODE
 CARES_CHECK_OPTION_DEBUG
 CARES_CHECK_OPTION_OPTIMIZE
 CARES_CHECK_OPTION_WARNINGS
+CARES_CHECK_OPTION_CURLDEBUG
 
 CARES_CHECK_PATH_SEPARATOR
 
@@ -94,11 +95,6 @@ esac
 dnl support building of Windows DLLs
 AC_LIBTOOL_WIN32_DLL
 
-CARES_PROCESS_DEBUG_BUILD_OPTS
-
-AM_CONDITIONAL(DEBUGBUILD, test x$want_debug = xyes)
-AM_CONDITIONAL(CURLDEBUG, test x$want_debug = xyes)
-
 dnl force libtool to build static libraries with PIC on AMD64-Linux & FreeBSD
 AC_MSG_CHECKING([if arch-OS host is AMD64-Linux/FreeBSD (to build static libraries with PIC)])
 case $host in
@@ -114,6 +110,10 @@ esac
 dnl libtool setup
 AC_PROG_LIBTOOL
 
+CARES_CHECK_CURLDEBUG
+
+AM_CONDITIONAL(CURLDEBUG, test x$want_curldebug = xyes)
+
 AC_MSG_CHECKING([if we need -no-undefined])
 case $host in
   *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-cegcc*)

ares/m4/cares-compilers.m4

@@ -16,7 +16,7 @@
 #***************************************************************************
 
 # File version for 'aclocal' use. Keep it a single number.
-# serial 51
+# serial 52
 
 
 dnl CARES_CHECK_COMPILER
@@ -1070,36 +1070,88 @@ squeeze() {
 ])
 
 
-dnl CARES_PROCESS_DEBUG_BUILD_OPTS
+dnl CARES_CHECK_CURLDEBUG
 dnl -------------------------------------------------
-dnl Settings which depend on configure's debug given
-dnl option, and further configure the build process.
-dnl Don't use this macro for compiler dependant stuff.
-
-AC_DEFUN([CARES_PROCESS_DEBUG_BUILD_OPTS], [
-  AC_REQUIRE([CARES_CHECK_OPTION_DEBUG])dnl
+dnl Settings which depend on configure's curldebug given
+dnl option, and other additional configure pre-requisites.
+dnl Using the curl debug memory tracking feature in c-ares
+dnl is a hack that actually can only be used/enabled when
+dnl c-ares is built as a static library directly in curl's
+dnl CVS tree along with an equally configured libcurl.
+
+AC_DEFUN([CARES_CHECK_CURLDEBUG], [
   AC_REQUIRE([CARES_SHFUNC_SQUEEZE])dnl
-  AC_BEFORE([$0],[AC_PROG_LIBTOOL])dnl
+  cares_builddir=`pwd`
+  supports_curldebug="unknown"
+  if test "$want_curldebug" = "yes"; then
+    if test "x$enable_shared" != "xno" &&
+      test "x$enable_shared" != "xyes"; then
+      AC_MSG_WARN([unknown enable_shared setting.])
+      supports_curldebug="no"
+    fi
+    if test "x$enable_static" != "xno" &&
+      test "x$enable_static" != "xyes"; then
+      AC_MSG_WARN([unknown enable_static setting.])
+      supports_curldebug="no"
+    fi
+    if test "$supports_curldebug" != "no"; then
+      if test "$enable_shared" != "no"; then
+        AC_MSG_WARN([configured to build shared library.])
+        supports_curldebug="no"
+      fi
+      if test "$enable_static" != "yes"; then
+        AC_MSG_WARN([configured to build no static library.])
+        supports_curldebug="no"
+      fi
+      if test ! -f "$srcdir/../include/curl/curlbuild.h.dist"; then
+        AC_MSG_WARN([source not embedded in curl's CVS tree.])
+        supports_curldebug="no"
+      elif test ! -f "$srcdir/../include/curl/Makefile.in"; then
+        AC_MSG_WARN([curl's buildconf has not been run.])
+        supports_curldebug="no"
+      elif test ! -f "$cares_builddir/../libcurl.pc" ||
+        test ! -f "$cares_builddir/../include/curl/curlbuild.h"; then
+        AC_MSG_WARN([curl's configure has not been run.])
+        supports_curldebug="no"
+      elif test ! -f "$cares_builddir/../lib/config.h"; then
+        AC_MSG_WARN([libcurl's config.h is missing.])
+        supports_curldebug="no"
+      elif test ! -f "$cares_builddir/../config.status"; then
+        AC_MSG_WARN([curl's config.status is missing.])
+        supports_curldebug="no"
+      fi
+      if test "$supports_curldebug" != "no"; then
+        grep '^#define USE_ARES' "$cares_builddir/../lib/config.h" >/dev/null
+        if test "$?" -ne "0"; then
+          AC_MSG_WARN([libcurl configured without c-ares support.])
+          supports_curldebug="no"
+        fi
+      fi
+      if test "$supports_curldebug" != "no"; then
+        grep 'CPPFLAGS.*CURLDEBUG' "$cares_builddir/../config.status" >/dev/null
+        if test "$?" -ne "0"; then
+          AC_MSG_WARN([libcurl configured without curldebug support.])
+          supports_curldebug="no"
+        fi
+      fi
+    fi
+  fi
   #
-  if test "$want_debug" = "yes"; then
-
-    dnl when doing the debug stuff, use static library only
-    AC_DISABLE_SHARED
-
-    debugbuild="yes"
-
-    dnl the entire --enable-debug is a hack that lives and runs on top of
-    dnl libcurl stuff so this BUILDING_LIBCURL is not THAT much uglier
+  if test "$want_curldebug" = "yes"; then
+    AC_MSG_CHECKING([if curl debug memory tracking can be enabled])
+    test "$supports_curldebug" = "no" || supports_curldebug="yes"
+    AC_MSG_RESULT([$supports_curldebug])
+    if test "$supports_curldebug" = "no"; then
+      AC_MSG_WARN([cannot enable curl debug memory tracking.])
+      want_curldebug="no"
+    fi
+  fi
+  #
+  if test "$want_curldebug" = "yes"; then
     AC_DEFINE(BUILDING_LIBCURL, 1, [when building as static part of libcurl])
-
     CPPFLAGS="$CPPFLAGS -DCURLDEBUG"
-
-    dnl CHECKME: Do we still need so specify this include path here?
-    CPPFLAGS="$CPPFLAGS -I$srcdir/../include"
-
     squeeze CPPFLAGS
   fi
-  #
 ])
 
 

ares/m4/cares-confopts.m4

 #***************************************************************************
 # $Id$
 #
-# Copyright (C) 2008 by Daniel Stenberg et al
+# Copyright (C) 2008 - 2009 by Daniel Stenberg et al
 #
 # Permission to use, copy, modify, and distribute this software and its
 # documentation for any purpose and without fee is hereby granted, provided
@@ -16,7 +16,46 @@
 #***************************************************************************
 
 # File version for 'aclocal' use. Keep it a single number.
-# serial 3
+# serial 4
+
+
+dnl CARES_CHECK_OPTION_CURLDEBUG
+dnl -------------------------------------------------
+dnl Verify if configure has been invoked with option
+dnl --enable-curldebug or --disable-curldebug, and set
+dnl shell variable want_curldebug value as appropriate.
+
+AC_DEFUN([CARES_CHECK_OPTION_CURLDEBUG], [
+  AC_BEFORE([$0],[CARES_CHECK_CURLDEBUG])dnl
+  AC_MSG_CHECKING([whether to enable curl debug memory tracking requested])
+  OPT_CURLDEBUG_BUILD="default"
+  AC_ARG_ENABLE(curldebug,
+AC_HELP_STRING([--enable-curldebug],[Enable curl debug memory tracking])
+AC_HELP_STRING([--disable-curldebug],[Disable curl debug memory tracking]),
+  OPT_CURLDEBUG_BUILD=$enableval)
+  case "$OPT_CURLDEBUG_BUILD" in
+    no)
+      dnl --disable-curldebug option used
+      want_curldebug="no"
+      ;;
+    default)
+      dnl configure option not specified
+      want_curldebug="no"
+      ;;
+    *)
+      dnl --enable-curldebug option used.
+      dnl The use of this option value is a request to enable curl's
+      dnl debug memory tracking for the c-ares library. This is a big
+      dnl hack that can only be done when a whole bunch of requisites
+      dnl are simultaneously satisfied. Later on, these requisites are
+      dnl verified and if they are not fully satisfied the option will
+      dnl be ignored and act as if --disable-curldebug had been given
+      dnl setting shell variable want_curldebug to 'no'.
+      want_curldebug="yes"
+      ;;
+  esac
+  AC_MSG_RESULT([$want_curldebug])
+])
 
 
 dnl CARES_CHECK_OPTION_DEBUG
@@ -28,6 +67,7 @@ dnl variable want_debug value as appropriate.
 AC_DEFUN([CARES_CHECK_OPTION_DEBUG], [
   AC_BEFORE([$0],[CARES_CHECK_OPTION_WARNINGS])dnl
   AC_BEFORE([$0],[CARES_CHECK_PROG_CC])dnl
+  AC_BEFORE([$0],[CARES_CHECK_CURLDEBUG])dnl
   AC_MSG_CHECKING([whether to enable debug build options])
   OPT_DEBUG_BUILD="default"
   AC_ARG_ENABLE(debug,

configure.ac

@@ -2530,6 +2530,10 @@ squeeze CURL_LIBS
 squeeze LIBCURL_LIBS
 squeeze TEST_SERVER_LIBS
 
+if test "x$want_debug" = "xyes" && test "x$HAVE_ARES" = "x1"; then
+  ac_configure_args="$ac_configure_args --enable-curldebug"
+fi
+
 AC_CONFIG_FILES([Makefile \
            docs/Makefile \
            docs/examples/Makefile \