Allow to disable -Werror at 'make' time

Having -Werror enabled all the time when developing can be a nuisance,
allow to disable it by passing E=0 to make, e.g

  $ make E=0 ...

This will set -Wno-error overriding the previously set -Werror.

Co-developed-by: Alejandro Colomar <alx@kernel.org>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/auto/make b/auto/make
index 1d54ab40..6c6d7e94 100644
--- a/auto/make
+++ b/auto/make
@@ -63,6 +63,14 @@ ifeq (\$D,1)
         CFLAGS += -O0
 endif
 
+# Optionally disable -Werror with
+#   make E=0 ...
+E := 1
+
+ifeq (\$E,0)
+        CFLAGS += -Wno-error
+endif
+
 END
 
 fi