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lib: add library version check macro

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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.
This commit is contained in:
Jani Nikula 2013-11-06 21:01:41 +02:00 committed by David Bremner
parent 3cf926463e
commit 060990db14
1 changed files with 24 additions and 0 deletions
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24
lib/notmuch.h
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@ -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.