[PATCH 1/3] configure.in compiler and enable libtool DLLs

["Richard W.M. Jones" <rjones@xxxxxxxxxx>]

In this patch what I've done is to move the checks for C compiler and 
checks for programs apart from each other.  We check for the C compiler 
first, then check for external programs later.  This is just a cleanup.

I've added AC_LIBTOOL_WIN32_DLL which enables DLL support in libtool 
(but shouldn't affect any other platform).

I've added AM_PROG_CC_STDC which appears to be required by the above.

I've added AC_C_CONST which is needed because libvirt uses 'const' 
without taking any special precautions for ancient compilers which don't 
support it.

Rich.

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Index: configure.in
===================================================================
RCS file: /data/cvs/libvirt/configure.in,v
retrieving revision 1.97
diff -u -r1.97 configure.in
--- configure.in	27 Nov 2007 14:39:42 -0000	1.97
+++ configure.in	29 Nov 2007 16:40:05 -0000
@@ -26,34 +26,20 @@
 GNUTLS_REQUIRED="1.0.25"
 AVAHI_REQUIRED="0.6.0"
 
-dnl Checks for programs.
+dnl Checks for C compiler.
 AC_PROG_CC
+AM_PROG_CC_STDC
+AC_C_CONST
 AC_PROG_INSTALL
 AC_PROG_CPP
-AC_PATH_PROG(RM, rm, /bin/rm)
-AC_PATH_PROG(MV, mv, /bin/mv)
-AC_PATH_PROG(TAR, tar, /bin/tar)
-AC_PATH_PROG(XMLLINT, xmllint, /usr/bin/xmllint)
-AC_PATH_PROG(XSLTPROC, xsltproc, /usr/bin/xsltproc)
-
-dnl External programs that we can use if they are available.
-dnl We will hard-code paths to these programs unless we cannot
-dnl detect them, in which case we'll search for the program
-dnl along the $PATH at runtime and fail if it's not there.
-AC_PATH_PROG(DNSMASQ, dnsmasq, dnsmasq,
-	[/sbin:/usr/sbin:/usr/local/sbin:$PATH])
-AC_PATH_PROG(BRCTL, brctl, brctl,
-	[/sbin:/usr/sbin:/usr/local/sbin:$PATH])
-
-AC_DEFINE_UNQUOTED([DNSMASQ],["$DNSMASQ"],
-        [Location or name of the dnsmasq program])
-AC_DEFINE_UNQUOTED([BRCTL],["$BRCTL"],
-        [Location or name of the brctl program (see bridge-utils)])
 
 dnl Make sure we have an ANSI compiler
 AM_C_PROTOTYPES
 test "x$U" != "x" && AC_MSG_ERROR(Compiler not ANSI compliant)
 
+dnl Support building Win32 DLLs (must appear *before* AM_PROG_LIBTOOL)
+AC_LIBTOOL_WIN32_DLL
+
 AM_PROG_LIBTOOL
 
 AM_PROG_CC_C_O
@@ -78,6 +72,27 @@
 		       [$ac_cv_path_RPCGEN -t </dev/null >/dev/null 2>&1])
 fi
 
+dnl Miscellaneous external programs.
+AC_PATH_PROG(RM, rm, /bin/rm)
+AC_PATH_PROG(MV, mv, /bin/mv)
+AC_PATH_PROG(TAR, tar, /bin/tar)
+AC_PATH_PROG(XMLLINT, xmllint, /usr/bin/xmllint)
+AC_PATH_PROG(XSLTPROC, xsltproc, /usr/bin/xsltproc)
+
+dnl External programs that we can use if they are available.
+dnl We will hard-code paths to these programs unless we cannot
+dnl detect them, in which case we'll search for the program
+dnl along the $PATH at runtime and fail if it's not there.
+AC_PATH_PROG(DNSMASQ, dnsmasq, dnsmasq,
+	[/sbin:/usr/sbin:/usr/local/sbin:$PATH])
+AC_PATH_PROG(BRCTL, brctl, brctl,
+	[/sbin:/usr/sbin:/usr/local/sbin:$PATH])
+
+AC_DEFINE_UNQUOTED([DNSMASQ],["$DNSMASQ"],
+        [Location or name of the dnsmasq program])
+AC_DEFINE_UNQUOTED([BRCTL],["$BRCTL"],
+        [Location or name of the brctl program (see bridge-utils)])
+
 dnl Specific dir for HTML output ?
 AC_ARG_WITH(html-dir, AC_HELP_STRING([--with-html-dir=path],
             [path to base html directory, default $datadir/doc/html]),

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