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-rw-r--r--external/db_drivers/CMakeLists.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/external/db_drivers/CMakeLists.txt b/external/db_drivers/CMakeLists.txt
index 13f70aa40..d537ec029 100644
--- a/external/db_drivers/CMakeLists.txt
+++ b/external/db_drivers/CMakeLists.txt
@@ -32,3 +32,6 @@ message(STATUS "Using ${ARCH_WIDTH}-bit LMDB from source tree")
add_subdirectory(liblmdb)
set(LMDB_INCLUDE "${CMAKE_CURRENT_SOURCE_DIR}/liblmdb" CACHE STRING "LMDB Include path")
set(LMDB_LIBRARY "lmdb" CACHE STRING "LMDB Library name")
+if(CMAKE_SYSTEM_NAME MATCHES "NetBSD")
+ set_property(TARGET lmdb APPEND_STRING PROPERTY COMPILE_FLAGS " -D_SEM_SEMUN_UNDEFINED")
+endif()