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make safe_flag check compatible with POSIX sh

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This commit is contained in:
Daniel Micay 2018-10-23 15:55:45 -04:00
parent 59def67979
commit 9d1567ce16
1 changed files with 1 additions and 1 deletions
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2
Makefile
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@ -3,7 +3,7 @@ CONFIG_UBSAN := false
CONFIG_SEAL_METADATA := false
define safe_flag
$(shell $(CC) -E $1 - </dev/null &>/dev/null && echo $1)
$(shell $(CC) -E $1 - </dev/null >/dev/null 2>&1 && echo $1)
endef
CPPFLAGS := -D_GNU_SOURCE