From: Aurélien Reynaud <collectd@wattapower.net>
Date: Tue, 4 May 2010 13:05:12 +0000 (+0200)
Subject: Check for different versions of swapctl() in configure.in
X-Git-Tag: collectd-5.0.0-beta0~120
X-Git-Url: https://git.octo.it/?p=collectd.git;a=commitdiff_plain;h=34eb0428ed2d9f8e9433cc71e43da6761d174e1a

Check for different versions of swapctl() in configure.in

The swapctl() function comes in two flavors. Depending on the OS,
it can take two or three arguments with the following prototypes:

swapctl (int cmd, void *arg, int misc);  (BSD version)
or
swapctl (int cmd, void *arg);            (HP-UX or Solaris version)

This patch adds support for detecting the right version of swapctl()
at configure time.

In addition to HAVE_SWAPCTL, HAVE_SWAPCTL_TWO_ARGS and/or
HAVE_SWAPCTL_THREE_ARGS are defined to reflect the result of the
check.

Signed-off-by: Florian Forster <octo@huhu.verplant.org>
---

diff --git a/configure.in b/configure.in
index 88ff302d..dbb4c32a 100644
--- a/configure.in
+++ b/configure.in
@@ -588,6 +588,55 @@ AC_CHECK_FUNCS(syslog, [have_syslog="yes"], [have_syslog="no"])
 AC_CHECK_FUNCS(getutent, [have_getutent="yes"], [have_getutent="no"])
 AC_CHECK_FUNCS(getutxent, [have_getutxent="yes"], [have_getutxent="no"])
 AC_CHECK_FUNCS(swapctl, [have_swapctl="yes"], [have_swapctl="no"])
+if test "x$have_swapctl" = "xyes"; then
+        AC_CACHE_CHECK([whether swapctl takes two arguments],
+                [c_cv_have_swapctl_two_args],
+                AC_COMPILE_IFELSE(
+                        AC_LANG_PROGRAM([[AC_INCLUDES_DEFAULT
+#if HAVE_SYS_SWAP_H && !defined(_LP64) && _FILE_OFFSET_BITS == 64
+#  undef _FILE_OFFSET_BITS
+#  undef _LARGEFILE64_SOURCE
+#endif
+#include <sys/stat.h>
+#include <sys/swap.h>]],
+                                [[
+                                int num = swapctl(0, NULL);
+                                ]]
+                        ),
+                        [c_cv_have_swapctl_two_args="yes"],
+                        [c_cv_have_swapctl_two_args="no"]
+                )
+        )
+        AC_CACHE_CHECK([whether swapctl takes three arguments],
+                [c_cv_have_swapctl_three_args],
+                AC_COMPILE_IFELSE(
+                        AC_LANG_PROGRAM([[AC_INCLUDES_DEFAULT
+#if HAVE_SYS_SWAP_H && !defined(_LP64) && _FILE_OFFSET_BITS == 64
+#  undef _FILE_OFFSET_BITS
+#  undef _LARGEFILE64_SOURCE
+#endif
+#include <sys/stat.h>
+#include <sys/swap.h>]],
+                                [[
+                                int num = swapctl(0, NULL,0);
+                                ]]
+                        ),
+                        [c_cv_have_swapctl_three_args="yes"],
+                        [c_cv_have_swapctl_three_args="no"]
+                )
+        )
+fi
+# Check for different versions of `swapctl' here..
+if test "x$have_swapctl" = "xyes"; then
+        if test "x$c_cv_have_swapctl_two_args" = "xyes"; then
+                AC_DEFINE(HAVE_SWAPCTL_TWO_ARGS, 1,
+                          [Define if the function swapctl exists and takes two arguments.])
+        fi
+        if test "x$c_cv_have_swapctl_three_args" = "xyes"; then
+                AC_DEFINE(HAVE_SWAPCTL_THREE_ARGS, 1,
+                          [Define if the function swapctl exists and takes three arguments.])
+        fi
+fi
 
 # For load module
 AC_CHECK_FUNCS(getloadavg, [have_getloadavg="yes"], [have_getloadavg="no"])