cmake: add a possibility to set library version

Add a new `ABIVERSION` define which allows to control the SOVERSION used
for the built shared library. This is needed for downstream packaging to
properly track breaking ABI changes when updating to newer versions of
the library.

Suggested-by: Jo-Philipp Wich <jo@mein.io>
Signed-off-by: Petr Štetiar <ynezz@true.cz>

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dcd455c02dfb36df7a52ab035e654af2452ee6d8..1a1b7d52d9a3a08b7a2836fd28b055d0c9a42225 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -92,3 +92,9 @@ IF(EXISTS ${json})
        )
 
 ENDIF()
+
+IF(ABIVERSION)
+       SET_TARGET_PROPERTIES(ubox PROPERTIES VERSION ${ABIVERSION})
+       SET_TARGET_PROPERTIES(json_script PROPERTIES VERSION ${ABIVERSION})
+       SET_TARGET_PROPERTIES(blobmsg_json PROPERTIES VERSION ${ABIVERSION})
+ENDIF()