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-rw-r--r--src/make.code.defn2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/make.code.defn b/src/make.code.defn
index 240ca2c..6326bab 100644
--- a/src/make.code.defn
+++ b/src/make.code.defn
@@ -5,7 +5,7 @@
SRCS = Startup.c DumpUtils.c DumpVar.c RecoverVar.c
# Extend CFLAGS if HDF5 library was built with LFS support
-LFS_support := $(shell grep _LARGEFILE_SOURCE $(strip $(HDF5_LIB_DIRS))/libhdf5.settings)
+LFS_support := $(shell grep -s _LARGEFILE_SOURCE $(strip $(HDF5_LIB_DIRS))/libhdf5.settings)
ifneq ($(strip $(LFS_support)),)
CFLAGS += -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64