| # -*- Python -*- |
| """Skylark macros for system libraries. |
| """ |
| |
| SYSTEM_LIBS_ENABLED = %{syslibs_enabled} |
| |
| SYSTEM_LIBS_LIST = [ |
| %{syslibs_list} |
| ] |
| |
| |
| def if_any_system_libs(a, b=[]): |
| """Conditional which evaluates to 'a' if any system libraries are configured.""" |
| if SYSTEM_LIBS_ENABLED: |
| return a |
| else: |
| return b |
| |
| |
| def if_system_lib(lib, a, b=[]): |
| """Conditional which evaluates to 'a' if we're using the system version of lib""" |
| |
| if SYSTEM_LIBS_ENABLED and lib in SYSTEM_LIBS_LIST: |
| return a |
| else: |
| return b |
| |
| |
| def if_not_system_lib(lib, a, b=[]): |
| """Conditional which evaluates to 'a' if we're using the system version of lib""" |
| |
| return if_system_lib(lib, b, a) |
