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Makefile: switch to POSIX mode to handle errors
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> .POSIX
>
> The application shall ensure that this special target is specified without prerequisites
> or commands. If it appears as the first non-comment line in the makefile, make shall
> process the makefile as specified by this section; otherwise, the behavior of make is
> unspecified.

Running the makefile with `.POSIX` runs shells with the `-e` options, which helps with
handling errors; without this, make can complet "succesfully", even if shell commands
in a target fail.

Note that this patch does not change behavior on macOS, which runs an older version of
GNU make that does not support these options.

Signed-off-by: Sebastiaan van Stijn <[email protected]>
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@thaJeztah
thaJeztah committed Dec 2, 2020
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Expand Up @@ -12,6 +12,8 @@
# See the License for the specific language governing permissions and
# limitations under the License.

.POSIX:

include common/common.mk

BUILD_IMAGE=centos:7
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