summaryrefslogtreecommitdiff
path: root/scripts/mkmakefile
diff options
context:
space:
mode:
Diffstat (limited to 'scripts/mkmakefile')
-rwxr-xr-xscripts/mkmakefile52
1 files changed, 52 insertions, 0 deletions
diff --git a/scripts/mkmakefile b/scripts/mkmakefile
new file mode 100755
index 000000000..84af27bf0
--- /dev/null
+++ b/scripts/mkmakefile
@@ -0,0 +1,52 @@
+#!/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 convinient build of external modules
+
+# Usage
+# $1 - Kernel src directory
+# $2 - Output directory
+# $3 - version
+# $4 - patchlevel
+
+
+test ! -r $2/Makefile -o -O $2/Makefile || exit 0
+# Only overwrite automatically generated Makefiles
+# (so we do not overwrite kernel 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
+
+VERSION = $3
+PATCHLEVEL = $4
+
+lastword = \$(word \$(words \$(1)),\$(1))
+makedir := \$(dir \$(call lastword,\$(MAKEFILE_LIST)))
+
+ifeq ("\$(origin V)", "command line")
+VERBOSE := \$(V)
+endif
+ifneq (\$(VERBOSE),1)
+Q := @
+endif
+
+MAKEARGS := -C $1
+MAKEARGS += O=\$(if \$(patsubst /%,,\$(makedir)),\$(CURDIR)/)\$(patsubst %/,%,\$(makedir))
+
+MAKEFLAGS += --no-print-directory
+
+.PHONY: __sub-make \$(MAKECMDGOALS)
+
+__sub-make:
+ \$(Q)\$(MAKE) \$(MAKEARGS) \$(MAKECMDGOALS)
+
+\$(filter-out __sub-make, \$(MAKECMDGOALS)): __sub-make
+ @:
+EOF