diff options
Diffstat (limited to 'cmake/external/nanopb.cmake')
| -rw-r--r-- | cmake/external/nanopb.cmake | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/cmake/external/nanopb.cmake b/cmake/external/nanopb.cmake index 5df0cf5..d09c668 100644 --- a/cmake/external/nanopb.cmake +++ b/cmake/external/nanopb.cmake @@ -55,9 +55,14 @@ ExternalProject_Add( # nanopb relies on $PATH for the location of protoc. cmake makes it difficult # to adjust the path, so we'll just patch the build files with the exact # location of protoc. + # + # NB: cmake sometimes runs the patch command multiple times in the same src + # dir, so we need to make sure this is idempotent. (eg 'make && make clean && + # make') PATCH_COMMAND - perl -i -pe s,protoc,${NANOPB_PROTOC_BIN},g - ./CMakeLists.txt ./generator/proto/Makefile + grep ${NANOPB_PROTOC_BIN} ./generator/proto/Makefile + || perl -i -pe s,protoc,${NANOPB_PROTOC_BIN},g + ./CMakeLists.txt ./generator/proto/Makefile UPDATE_COMMAND "" INSTALL_COMMAND "" |