build system: fix for older GNU make

Commit 992387539 (build system: more clang/llvm tweaks) added a
test in scripts/Makefile.build which used the intcmp function.
This isn't present in GNU make prior to 4.4.

Rewrite the test so it works with older versions of GNU make.

1 files changed, 9 insertions, 3 deletions

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 2a9f451f3..cd5592b34 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -265,11 +265,17 @@ else
 # zero or one object files.  In the latter case copy the object to
 # the target.  This avoids the need to use the linker:  the llvm
 # linker doesn't support the -r option.
-cmd_link_o_target = $(intcmp $(words $(obj-y)),1,\
-                rm -f $@; $(AR) rcs $@,\
-                cp $(obj-y) $@,\
+ifeq ($(words $(obj-y)),0)
+cmd_link_o_target = rm -f $@; $(AR) rcs $@
+else
+ifeq ($(words $(obj-y)),1)
+cmd_link_o_target = cp $(obj-y) $@
+else
+cmd_link_o_target = \
                 $(LD) -nostdlib $(ld_flags) -r -o $@ $(filter $(obj-y), $^))
 endif
+endif
+endif
 
 $(builtin-target): $(obj-y) FORCE
         $(call if_changed,link_o_target)