diff options
Diffstat (limited to 'infra/cmake/modules/TargetRequire.cmake')
| -rw-r--r-- | infra/cmake/modules/TargetRequire.cmake | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/infra/cmake/modules/TargetRequire.cmake b/infra/cmake/modules/TargetRequire.cmake new file mode 100644 index 000000000..801600dd9 --- /dev/null +++ b/infra/cmake/modules/TargetRequire.cmake @@ -0,0 +1,45 @@ +# TargetRequire_Check(NAME t1 t2 t3 ...) +# +# TargetRequire_Check(NAME ...) sets "NAME" as TRUE if all the required targets are +# available, and FALSE otherwise. +function(TargetRequire_Check VARNAME) + set(${VARNAME} TRUE PARENT_SCOPE) + foreach(REQUIRED_TARGET IN ITEMS ${ARGN}) + if(NOT TARGET ${REQUIRED_TARGET}) + set(${VARNAME} FALSE PARENT_SCOPE) + return() + endif(NOT TARGET ${REQUIRED_TARGET}) + endforeach(REQUIRED_TARGET) +endfunction(TargetRequire_Check) + +# TargetRequire_Assert(t1 t2 t3 ...) +# +# TargetRequire_Assert(...) stops CMake immediately if there is a target required but unavailable. +function(TargetRequire_Assert) + unset(MISSING_TARGETS) + + foreach(REQUIRED_TARGET IN ITEMS ${ARGN}) + if(NOT TARGET ${REQUIRED_TARGET}) + list(APPEND MISSING_TARGETS ${REQUIRED_TARGET}) + endif(NOT TARGET ${REQUIRED_TARGET}) + endforeach(REQUIRED_TARGET) + + list(LENGTH MISSING_TARGETS MISSING_COUNT) + + if(NOT MISSING_COUNT EQUAL 0) + message(FATAL_ERROR "${MISSING_TARGETS} are required, but unavailable") + endif(NOT MISSING_COUNT EQUAL 0) +endfunction(TargetRequire_Assert) + +# TargetRequire_Return(t1 t2 t3 ...) +# +# TargetRequire_Return(...) returns immediately if there is a target required but unavailable. +# +# NOTE "macro" is inevitable to make "return" inside affect the caller. +macro(TargetRequire_Return) + foreach(REQUIRED_TARGET IN ITEMS ${ARGN}) + if(NOT TARGET ${REQUIRED_TARGET}) + return() + endif(NOT TARGET ${REQUIRED_TARGET}) + endforeach(REQUIRED_TARGET) +endmacro(TargetRequire_Return) |