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FindMPI: Honor MPI_CXX_SKIP_MPICXX when set as a normal variable

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Express the cache entry with `option()`.  In combination with policies
CMP0077 and CMP0102, this allows project code to control the switch with
a variable:

```
set(MPI_CXX_SKIP_MPICXX TRUE)
find_package(MPI COMPONENTS CXX)
```
This commit is contained in:
Brad King
2021-07-06 19:40:16 -04:00
parent 16d9c317a3
commit 1a9ebd1694
1 changed files with 1 additions and 1 deletions
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2
Modules/FindMPI.cmake
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@@ -1440,7 +1440,7 @@ foreach(LANG IN ITEMS C CXX Fortran)
endif()
if(_MPI_FIND_${LANG})
if( ${LANG} STREQUAL CXX AND NOT MPICXX IN_LIST MPI_FIND_COMPONENTS )
set(MPI_CXX_SKIP_MPICXX FALSE CACHE BOOL "If true, the MPI-2 C++ bindings are disabled using definitions.")
option(MPI_CXX_SKIP_MPICXX "If true, the MPI-2 C++ bindings are disabled using definitions." FALSE)
mark_as_advanced(MPI_CXX_SKIP_MPICXX)
endif()
if(NOT (MPI_${LANG}_LIB_NAMES AND (MPI_${LANG}_INCLUDE_PATH OR MPI_${LANG}_INCLUDE_DIRS OR MPI_${LANG}_COMPILER_INCLUDE_DIRS)))