env: do not fail on non-existing env.in file

If include/generated/env.in does not exist, which is a typical case for
clean build, quiet_cmd_gen_envp command tries to delete this file
unconditionally.

This produces following warning during the build:
  ENVP    include/generated/env.in
rm: cannot remove 'include/generated/env.in': No such file or directory

Add '-f' option to the `rm` command to not complain if file does not
exist.

Fixes: f432eb6d8a9d ("env: Avoid using a leftover text-environment file")
Reviewed-by: Sean Anderson <seanga2@gmail.com>
Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>

diff --git a/Makefile b/Makefile
index 4672147..868445b 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1846,7 +1846,7 @@ quiet_cmd_gen_envp = ENVP    $@
                        -I$(srctree)/arch/$(ARCH)/include \
                        $< -o $@; \
        else \
-               rm $@; \
+               rm -f $@; \
                touch $@ ; \
        fi
 include/generated/env.in: include/generated/env.txt FORCE