set -e for e9compile.sh

It is easier to debug when the script does not fall through errors.

The grep invocation is moved inside the predicate to not fail
when there is no match.

Author: McSinyx

e9compile.sh

@@ -15,6 +15,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+set -e
+
 if [ -t 1 ]
 then
     RED="\033[31m"
@@ -95,8 +97,7 @@ then
     exit 1
 fi
 
-RELOCS=`readelf -r "$BASENAME" | head -n 10 | grep 'R_X86_64_'`
-if [ ! -z "$RELOCS" ]
+if readelf -r "$BASENAME" | head -n 10 | grep -q 'R_X86_64_'
 then
     echo >&2
     echo "${RED}warning${OFF}: the generated file (${YELLOW}$BASENAME${OFF}) contains relocations" >&2