path: root/Makefile
diff options
authorRich Felker <>2013-08-14 02:50:25 -0400
committerRich Felker <>2013-08-14 02:50:25 -0400
commitfb72a97df9222be61ec582ba7b1e9ce496b65e3e (patch)
tree49e87d623470f496aa4e0c0fdc57db6903a1830c /Makefile
parent4ce6bd83456981081721b2acd8ef48b282cd88ee (diff)
rework makefile subarch logic to allow shared files
instead of subarchs getting their own .s files which are used directly by the makefile to replace the .c file, they now must provide a .sub file whose contents are a pathname, relative to the location of the .sub file, which will substitute for the .c file. essentially these files are acting as symbolic links, but implemented as text files.
Diffstat (limited to 'Makefile')
1 files changed, 12 insertions, 4 deletions
diff --git a/Makefile b/Makefile
index 9206ca02..33c2de1b 100644
--- a/Makefile
+++ b/Makefile
@@ -90,8 +90,16 @@ $(OPTIMIZE_SRCS:%.c=%.o) $(OPTIMIZE_SRCS:%.c=%.lo): CFLAGS += -O3
MEMOPS_SRCS = src/string/memcpy.c src/string/memmove.c src/string/memcmp.c src/string/memset.c
-%.o: $(ARCH)$(ASMSUBARCH)/%.s
- $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
+# This incantation ensures that changes to any subarch asm files will
+# force the corresponding object file to be rebuilt, even if the implicit
+# rule below goes indirectly through a .sub file.
+define mkasmdep
+$(dir $(patsubst %/,%,$(dir $(1))))$(notdir $(1:.s=.o)): $(1)
+$(foreach s,$(wildcard src/*/$(ARCH)*/*.s),$(eval $(call mkasmdep,$(s))))
+%.o: $(ARCH)$(ASMSUBARCH)/%.sub
+ $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $(dir $<)$(shell cat $<)
%.o: $(ARCH)/%.s
$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
@@ -99,8 +107,8 @@ $(MEMOPS_SRCS:%.c=%.o) $(MEMOPS_SRCS:%.c=%.lo): CFLAGS += $(CFLAGS_MEMOPS)
%.o: %.c $(GENH) $(IMPH)
$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
-%.lo: $(ARCH)$(ASMSUBARCH)/%.s
- $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<
+%.lo: $(ARCH)$(ASMSUBARCH)/%.sub
+ $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $(dir $<)$(shell cat $<)
%.lo: $(ARCH)/%.s
$(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<