Initial support of curlbuild.h and curlrules.h which allows

to have a curl_off_t data type no longer gated to off_t.

Makefile.am

@@ -1,7 +1,31 @@
-AUTOMAKE_OPTIONS = foreign
+AUTOMAKE_OPTIONS = foreign nostdinc
 
 ACLOCAL_AMFLAGS = -I m4
 
+# Specify our include paths here, and do it relative to $(top_srcdir) and
+# $(top_builddir), to ensure that these paths which belong to the library
+# being currently built and tested are searched before the library which
+# might possibly already be installed in the system.
+#
+# When using the low-level hard-hacking memory leak tracking code from
+# libcurl the generated curl/curlbuild.h file must also be reachable.
+# Using the libcurl lowlevel code from within c-ares library is ugly and
+# only works when c-ares is built and linked with a similarly debug-build
+# libcurl, but we do this anyway for convenience.
+#
+# $(top_builddir)/../include is for libcurl's generated curl/curlbuild.h file
+# $(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$(top_builddir)            \
+           -I$(top_srcdir)
+else
+INCLUDES = -I$(top_builddir) \
+           -I$(top_srcdir)
+endif
+
 lib_LTLIBRARIES = libcares.la
 
 man_MANS = $(MANPAGES)

configure.ac

@@ -122,6 +122,7 @@ AC_HELP_STRING([--disable-debug],[Disable debug options]),
        AC_MSG_RESULT(no)
 )
 AM_CONDITIONAL(DEBUGBUILD, test x$debugbuild = xyes)
+AM_CONDITIONAL(CURLDEBUG, test x$debugbuild = xyes)
 
 dnl skip libtool C++ and Fortran compiler checks
 m4_ifdef([AC_PROG_CXX], [m4_undefine([AC_PROG_CXX])])