15.12 Programming for Multiple X Releases
In R5 and later, Xlib defines the symbol
XlibSpecificationRelease
with the release number as
the value (i.e., 5). This can be used to allow an application to
successfully compile with more than one release of Xlib (assuming of
course it depends only on features present in the releases which it will
be compiled). Example 15-4 shows a code
segment into which R4, R5 and R6 code could be inserted:
Example 15-4. Using the XlibSpecificationRelease symbol
#ifdef XlibSpecificationRelease if (XlibSpecificationRelease == 5) ;/* R5 */ else if (XlibSpecificationRelease == 6) ;/* R6 */ else ;/* R7 or error */ #elseif /* R4 */ #endif
Get XLIB Programming Manual, Rel. 5, Third Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.