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-rw-r--r--Makeconfig8
1 files changed, 7 insertions, 1 deletions
diff --git a/Makeconfig b/Makeconfig
index 2d4343b604..a0abc2239b 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -888,7 +888,7 @@ host-test-program-cmd = $(host-built-program-cmd)
 endif
 
 # Extra flags to pass to GCC.
-+gccwarn := -Wall -Wwrite-strings -Wundef
++gccwarn := -Wall -Wwrite-strings -Wundef $(cc-option-wimplicit-fallthrough)
 ifeq ($(enable-werror),yes)
 +gccwarn += -Werror
 endif
@@ -1011,6 +1011,12 @@ else
 +cflags += $(no-fortify-source)
 endif
 
+# Filter out LFS flags if compiler defines it by default.
++cflags += $(no-file-offset-bits-source)
+
+# Filter out 64 bit time_t flags if compiler defines it by default.
++cflags += $(no-time-bits-source)
+
 # Each sysdeps directory can contain header files that both will be
 # used to compile and will be installed.  Each can also contain an
 # include/ subdirectory, whose header files will be used to compile