[PATCH] lib: add library version check macro
Jani Nikula
jani at nikula.org
Wed Nov 6 11:01:41 PST 2013
There have been some plans for making build incompatible changes to
the library API. This is inconvenient, but it is much more so without
a way to easily conditional build against multiple versions of
notmuch.
The macro has been lifted from glib.
---
lib/notmuch.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/lib/notmuch.h b/lib/notmuch.h
index 9dab555..d109a2c 100644
--- a/lib/notmuch.h
+++ b/lib/notmuch.h
@@ -41,6 +41,30 @@ NOTMUCH_BEGIN_DECLS
#define TRUE 1
#endif
+#define NOTMUCH_MAJOR_VERSION 0
+#define NOTMUCH_MINOR_VERSION 17
+#define NOTMUCH_MICRO_VERSION 0
+
+/*
+ * Check the version of the notmuch library being compiled against.
+ *
+ * Return true if the library being compiled against is of the
+ * specified version or above. For example:
+ *
+ * #if NOTMUCH_CHECK_VERSION(0, 18, 0)
+ * (code requiring notmuch 0.18 or above)
+ * #endif
+ *
+ * NOTMUCH_CHECK_VERSION has been defined since version 0.17.0; you
+ * can use #if !defined(NOTMUCH_CHECK_VERSION) to check for versions
+ * prior to that.
+ */
+#define NOTMUCH_CHECK_VERSION (major, minor, micro) \
+ (NOTMUCH_MAJOR_VERSION > (major) || \
+ (NOTMUCH_MAJOR_VERSION == (major) && NOTMUCH_MINOR_VERSION > (minor)) || \
+ (NOTMUCH_MAJOR_VERSION == (major) && NOTMUCH_MINOR_VERSION == (minor) && \
+ NOTMUCH_MICRO_VERSION >= (micro)))
+
typedef int notmuch_bool_t;
/* Status codes used for the return values of most functions.
--
1.8.4.rc3
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