Re: [PATCH] lib: add library version check macro

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+From: Tomi Ollila <tomi.ollila@iki.fi>\r
+To: Jani Nikula <jani@nikula.org>, notmuch@notmuchmail.org\r
+Subject: Re: [PATCH] lib: add library version check macro\r
+In-Reply-To: <1383764501-18973-1-git-send-email-jani@nikula.org>\r
+References: <1383764501-18973-1-git-send-email-jani@nikula.org>\r
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+Date: Thu, 07 Nov 2013 15:13:59 +0200\r
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+\r
+On Wed, Nov 06 2013, Jani Nikula <jani@nikula.org> wrote:\r
+\r
+> There have been some plans for making build incompatible changes to\r
+> the library API. This is inconvenient, but it is much more so without\r
+> a way to easily conditional build against multiple versions of\r
+> notmuch.\r
+>\r
+> The macro has been lifted from glib.\r
+\r
++1\r
+\r
+Tomi\r
+\r
+\r
+> ---\r
+>  lib/notmuch.h | 24 ++++++++++++++++++++++++\r
+>  1 file changed, 24 insertions(+)\r
+>\r
+> diff --git a/lib/notmuch.h b/lib/notmuch.h\r
+> index 9dab555..d109a2c 100644\r
+> --- a/lib/notmuch.h\r
+> +++ b/lib/notmuch.h\r
+> @@ -41,6 +41,30 @@ NOTMUCH_BEGIN_DECLS\r
+>  #define TRUE 1\r
+>  #endif\r
+>  \r
+> +#define NOTMUCH_MAJOR_VERSION       0\r
+> +#define NOTMUCH_MINOR_VERSION       17\r
+> +#define NOTMUCH_MICRO_VERSION       0\r
+> +\r
+> +/*\r
+> + * Check the version of the notmuch library being compiled against.\r
+> + *\r
+> + * Return true if the library being compiled against is of the\r
+> + * specified version or above. For example:\r
+> + *\r
+> + * #if NOTMUCH_CHECK_VERSION(0, 18, 0)\r
+> + *     (code requiring notmuch 0.18 or above)\r
+> + * #endif\r
+> + *\r
+> + * NOTMUCH_CHECK_VERSION has been defined since version 0.17.0; you\r
+> + * can use #if !defined(NOTMUCH_CHECK_VERSION) to check for versions\r
+> + * prior to that.\r
+> + */\r
+> +#define NOTMUCH_CHECK_VERSION (major, minor, micro)                 \\r
+> +    (NOTMUCH_MAJOR_VERSION > (major) ||                                     \\r
+> +     (NOTMUCH_MAJOR_VERSION == (major) && NOTMUCH_MINOR_VERSION > (minor)) || \\r
+> +     (NOTMUCH_MAJOR_VERSION == (major) && NOTMUCH_MINOR_VERSION == (minor) && \\r
+> +      NOTMUCH_MICRO_VERSION >= (micro)))\r
+> +\r
+>  typedef int notmuch_bool_t;\r
+>  \r
+>  /* Status codes used for the return values of most functions.\r
+> -- \r
+> 1.8.4.rc3\r
+>\r
+> _______________________________________________\r
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