• Modestas Vainius's avatar
    Support building shared libraries or modules without soname (#13155) · e1409ac5
    Modestas Vainius authored
    Add a boolean target property NO_SONAME which may be used to disable
    soname for the specified shared library or module even if the platform
    supports it.  This property should be useful for private shared
    libraries or various plugins which live in private directories and have
    not been designed to be found or loaded globally.
    
    Replace references to <CMAKE_SHARED_LIBRARY_SONAME_${LANG}_FLAG> and
    hard-coded -install_name flags with a conditional <SONAME_FLAG> which is
    expanded to the value of the CMAKE_SHARED_LIBRARY_SONAME_${LANG}_FLAG
    definition as long as soname supports is enabled for the target in
    question.  Keep expanding CMAKE_SHARED_LIBRARY_SONAME_${LANG}_FLAG in
    rules in case third party projects still use it.  Such projects would
    not yet use NO_SONAME so the adjacent <TARGET_SONAME> will always be
    expanded.  Make <TARGET_INSTALLNAME_DIR> NO_SONAME aware as well.  Since
    -install_name is soname on OS X, this should not be a problem if this
    variable is expanded only if soname is enabled.
    
    The Ninja generator performs rule variable substitution only once
    globally per rule to put its own placeholders.  Final substitution is
    performed by ninja at build time.  Therefore we cannot conditionally
    replace the soname placeholders on a per-target basis.  Rather than
    omitting $SONAME from rules.ninja, simply do not write its contents for
    targets which have NO_SONAME.  Since 3 variables are affected by
    NO_SONAME ($SONAME, $SONAME_FLAG, $INSTALLNAME_DIR), set them only if
    soname is enabled.
    e1409ac5
CMakeCXXInformation.cmake 11.1 KB