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-rw-r--r--make/custom/Linux-posix.cfg1
1 files changed, 1 insertions, 0 deletions
diff --git a/make/custom/Linux-posix.cfg b/make/custom/Linux-posix.cfg
index ad78430c6e..22597b84b9 100644
--- a/make/custom/Linux-posix.cfg
+++ b/make/custom/Linux-posix.cfg
@@ -24,6 +24,7 @@ LIBC_DEFINES+=-DRTEMS_UNIXLIB -DRTEMS_UNIX -DMALLOC_PROVIDED -DRTEMS_DEBUG
LIBC_DEFINES += -DWORKSPACE_MB=2
LIBC_DEFINES += -DHEAPSPACE_MB=1
+DEFINES += -D_BSD_SOURCE
# Define this to yes if C++ is included in the development environment
# This requires that at least the GNU C++ compiler and libg++ be installed.