vcpkg/ports/boost-cmake/fix-mpi.diff

diff --git a/include/BoostInstall.cmake b/include/BoostInstall.cmake
index 47f3eb756e..49c0086fea 100644
--- a/include/BoostInstall.cmake	
+++ b/include/BoostInstall.cmake
@@ -336,6 +336,13 @@ function(boost_install_target)
 
         string(APPEND CONFIG_FILE_CONTENTS "find_dependency(zstd CONFIG)\n")
 
+      elseif(dep STREQUAL "MPI::MPI_C")
+
+        # COMPONENTS requires 3.9, but the imported target also requires 3.9
+        string(APPEND CONFIG_FILE_CONTENTS "enable_language(C)\n")
+        string(APPEND CONFIG_FILE_CONTENTS "find_dependency(MPI COMPONENTS C)\n")
+
+
       elseif(dep STREQUAL "MPI::MPI_CXX")
 
         # COMPONENTS requires 3.9, but the imported target also requires 3.9