another curiosity related to my current travels through the initramfs code, i noticed this git commit from back in 2013: $ git show 7ac1815683 commit 7ac181568342ec618d4da1ab03c2babcaa7ee84f Author: Jan Beulich <JBeulich@suse.com> Date: Wed Dec 18 17:08:57 2013 -0800 fix build with make 3.80 According to Documentation/Changes, make 3.80 is still being supported for building the kernel, hence make files must not make (unconditional) use of features introduced only in newer versions. Commit 1bf49dd4be0b ("./Makefile: export initial ramdisk compression config option") however introduced "else ifeq" constructs which make 3.80 doesn't understand. Replace the logic there with more conventional (in the kernel build infrastructure) list constructs (except that the list here is intentionally limited to exactly one element). Signed-off-by: Jan Beulich <jbeulich@suse.com> Cc: P J P <ppandit@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> diff --git a/Makefile b/Makefile index 858a147..89cee86 100644 --- a/Makefile +++ b/Makefile @@ -732,19 +732,13 @@ export mod_strip_cmd # Select initial ramdisk compression format, default is gzip(1). # This shall be used by the dracut(8) tool while creating an initramfs image. # -INITRD_COMPRESS=gzip -ifeq ($(CONFIG_RD_BZIP2), y) - INITRD_COMPRESS=bzip2 -else ifeq ($(CONFIG_RD_LZMA), y) - INITRD_COMPRESS=lzma -else ifeq ($(CONFIG_RD_XZ), y) - INITRD_COMPRESS=xz -else ifeq ($(CONFIG_RD_LZO), y) - INITRD_COMPRESS=lzo -else ifeq ($(CONFIG_RD_LZ4), y) - INITRD_COMPRESS=lz4 -endif -export INITRD_COMPRESS +INITRD_COMPRESS-y := gzip +INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 +INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma +INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz +INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo +INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 +export INITRD_COMPRESS := $(INITRD_COMPRESS-y) ... etc etc ... now, Documentation/Changes currently does indeed state: Current Minimal Requirements ============================ ... snip ... o GNU make 3.80 # make --version but i did a quick grep to find: $ grep -r "else ifeq" * lib/raid6/test/Makefile:else ifeq ($(HAS_NEON),yes) $ so would that single test not violate the rule just described above? is Documentation/Changes entirely up to date with respect to minimal requirements? rday -- ======================================================================== Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ========================================================================