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build-sys: Use X="$X ..." rather than X+="..." in configure.ac

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Some configure interpreters do not like X+="...", so we have to
use X="$X ..." instead.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
This commit is contained in:
Stefan Berger 2018-08-29 17:47:19 +00:00
parent 83ca1948bc
commit b6a89b2f55
1 changed files with 3 additions and 3 deletions
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6
configure.ac
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@ -173,14 +173,14 @@ dnl Must not have -O0 but must have a -O for -D_FORTIFY_SOURCE=2
TMP1="$(echo $CFLAGS | sed -n 's/.*\(-O0\).*/\1/p')"
TMP2="$(echo $CFLAGS | sed -n 's/.*\(-O\).*/\1/p')"
if test -z "$TMP1" && test -n "$TPM2"; then
HARDENING_CFLAGS+="-D_FORTIFY_SOURCE=2 "
HARDENING_CFLAGS="$HARDENING_CFLAGS -D_FORTIFY_SOURCE=2 "
fi
dnl Check ld for 'relro' and 'now'
if $LD --help 2>&1 | $GREP '\-z relro ' > /dev/null; then
HARDENING_LDFLAGS+="-Wl,-z,relro "
HARDENING_LDFLAGS="$HARDENING_LDFLAGS -Wl,-z,relro "
fi
if $LD --help 2>&1 | $GREP '\-z now ' > /dev/null; then
HARDENING_LDFLAGS+="-Wl,-z,now "
HARDENING_LDFLAGS="$HARDENING_LDFLAGS -Wl,-z,now "
fi
AC_SUBST([HARDENING_CFLAGS])
AC_SUBST([HARDENING_LDFLAGS])