Reworked shared library versioning

README.md

@@ -93,6 +93,7 @@ Added Visual Studio support for wolfPKCS11. Fixes for cast warnings and portabil
 * Fixed portability issues with `WOLFPKCS11_USER_SETTINGS`. (PR #28)
 * Added Visual Studio support for wolfPKCS11. (PR #28)
   - This includes wolfTPM support with Windows TBS interface
+* Reworked shared library versioning. (PR #29)
 
 
 ### wolfPKCS11 Release 1.2 (Dec 26, 2023)

configure.ac

@@ -32,18 +32,25 @@ AC_ARG_PROGRAM
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_HEADERS([wolfpkcs11/config.h])
 
-WOLFPKCS11_LIBRARY_VERSION=3:1:0
-#                        | | |
-#                 +------+ | +---+
-#                 |        |     |
-#                current:revision:age
-#                 |        |     |
-#                 |        |     +- increment if interfaces have been added
-#                 |        |        set to zero if interfaces have been removed
-#                 |        |        or changed
-#                 |        +- increment if source code has changed
-#                 |           set to zero if current is incremented
-#                 +- increment if interfaces have been added, removed or changed
+# shared library versioning
+# The three numbers in the libpkcs11.so.*.*.* file name. Unfortunately
+
+# increment if interfaces have been removed or changed
+WOLFPKCS11_LIBRARY_VERSION_FIRST=3
+
+# increment if interfaces have been added
+# set to zero if WOLFPKCS11_LIBRARY_VERSION_FIRST is incremented
+WOLFPKCS11_LIBRARY_VERSION_SECOND=1
+
+# increment if source code has changed
+# set to zero if WOLFPKCS11_LIBRARY_VERSION_FIRST is incremented or
+# WOLFPKCS11_LIBRARY_VERSION_SECOND is incremented
+WOLFPKCS11_LIBRARY_VERSION_THIRD=0
+
+WOLFPKCS11_LIBRARY_VERSION=${WOLFPKCS11_LIBRARY_VERSION_FIRST}:${WOLFPKCS11_LIBRARY_VERSION_SECOND}:${WOLFPKCS11_LIBRARY_VERSION_THIRD}
+AC_SUBST([WOLFPKCS11_LIBRARY_VERSION_FIRST])
+AC_SUBST([WOLFPKCS11_LIBRARY_VERSION_SECOND])
+AC_SUBST([WOLFPKCS11_LIBRARY_VERSION_THIRD])
 AC_SUBST([WOLFPKCS11_LIBRARY_VERSION])
 
 

src/include.am

@@ -12,7 +12,7 @@ src_libwolfpkcs11_la_SOURCES = \
 
 src_libwolfpkcs11_la_CFLAGS       = -DBUILDING_WOLFPKCS11 $(AM_CFLAGS)
 src_libwolfpkcs11_la_CPPFLAGS     = -DBUILDING_WOLFPKCS11 $(AM_CPPFLAGS)
-src_libwolfpkcs11_la_LDFLAGS      = ${AM_LDFLAGS} -no-undefined -version-info ${WOLFPKCS11_LIBRARY_VERSION} 
+src_libwolfpkcs11_la_LDFLAGS      = ${AM_LDFLAGS} -no-undefined -version-number ${WOLFPKCS11_LIBRARY_VERSION}
 
 #src_libwolfpkcs11_la_DEPENDENCIES =
 #EXTRA_DIST +=