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Makefile: undefine _FORTIFY_SOURCE prior using it

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Currently, we are enforcing the _FORTIFY_SOURCE=2 without any
previous detection if the macro has been already defined, e.g.
by environment, or is just enabled by compiler by default on
some distributions (e.g. Gentoo).

This could result in the error like this:
<command-line>:0:0: error: "_FORTIFY_SOURCE" redefined [-Werror]
<built-in>: note: this is the location of the previous definition

Tracked-On: #2344
Signed-off-by: Tw <wei.tan@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@intel.com>
Acked-by: Yin Fengwei <fengwei.yin@intel.com>
This commit is contained in:
Tw
2018-10-23 15:02:24 +08:00
committed by wenlingz
parent 3b2784ec1b
commit 33ecdd7389
5 changed files with 5 additions and 5 deletions
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2
tools/acrnlog/Makefile
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@@ -8,7 +8,7 @@ LOG_CFLAGS += -DNO_OPENSSL
LOG_CFLAGS += -m64
LOG_CFLAGS += -Wall -ffunction-sections
LOG_CFLAGS += -Werror
LOG_CFLAGS += -O2 -D_FORTIFY_SOURCE=2
LOG_CFLAGS += -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
LOG_CFLAGS += -Wformat -Wformat-security -fno-strict-aliasing
LOG_CFLAGS += -fpie -fpic
LOG_CFLAGS += $(CFLAGS)