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-rw-r--r--package/flex/Config.in2
1 files changed, 2 insertions, 0 deletions
diff --git a/package/flex/Config.in b/package/flex/Config.in
index f74a0f0e8b..1ecd0c3572 100644
--- a/package/flex/Config.in
+++ b/package/flex/Config.in
@@ -12,5 +12,7 @@ config BR2_PACKAGE_FLEX_BINARY
# needs fork()
depends on BR2_USE_MMU
depends on BR2_PACKAGE_FLEX
+ # runtime dependency
+ select BR2_PACKAGE_M4
help
Install the flex binary tool in the target filesystem.