buildrootschalter/support/scripts/mkmakefile
Yann E. MORIN 971faf828d Makefile: fix out-of-tree builds with multiple targets with 'all'
For out-of-tree builds, this use-case fails to build:
    $ make clean all

This is because 'all' is filtered-out in the Makefile wrapper, since
the wrapper itself has a 'all' target.

The 'all' target is just the usual naming for the default target in a
Makefile. In fact, the first target is the default one, so we can name
it whatever we want.

Rename the Makefile wrapper 'all' target to avoid name-clashing.

Fixes #6644.

Reported-by: Ryan Barnett <rjbarnet@rockwellcollins.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Ryan Barnett <rjbarnet@rockwellcollins.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Ryan Barnett <rjbarnet@rockwellcollins.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2013-11-06 23:24:47 +01:00

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#!/bin/sh
# Generates a small Makefile used in the root of the output
# directory, to allow make to be started from there.
# The Makefile also allow for more convenient build of external modules
# Usage
# $1 - Kernel src directory
# $2 - Output directory
test ! -r $2/Makefile -o -O $2/Makefile || exit 0
# Only overwrite automatically generated Makefiles
# (so we do not overwrite buildroot Makefile)
if test -e $2/Makefile && ! grep -q Automatically $2/Makefile
then
exit 0
fi
if [ "${quiet}" != "silent_" ]; then
echo " GEN $2/Makefile"
fi
cat << EOF > $2/Makefile
# Automatically generated by $0: don't edit
lastword = \$(word \$(words \$(1)),\$(1))
makedir := \$(dir \$(call lastword,\$(MAKEFILE_LIST)))
MAKEARGS := -C $1
MAKEARGS += O=\$(if \$(patsubst /%,,\$(makedir)),\$(CURDIR)/)\$(patsubst %/,%,\$(makedir))
MAKEFLAGS += --no-print-directory
.PHONY: all \$(MAKECMDGOALS)
all := \$(filter-out Makefile,\$(MAKECMDGOALS))
_all:
\$(MAKE) \$(MAKEARGS) \$(all)
Makefile:;
\$(all): _all
@:
%/: _all
@:
EOF