When the header files are modified, the compiled objects are not going
to be recompiled because the header files are not marked as a dependency
for the objects.
- Instruct the compiler to generate dependency files.
- Include those files from src/Makefile. Ensure if any changes are
made, files that depend on the changes are recompiled.
Suggested-by: Ammar Faizi <ammarfaizi2@xxxxxxxxxxx>
Signed-off-by: Alviro Iskandar Setiawan <alviro.iskandar@xxxxxxxxxxx>
---
v2 -> v3:
- Add dependency files to .gitignore.
- Remove dependency files when running "make clean".
.gitignore | 1 +
src/Makefile | 13 ++++++-------
2 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/.gitignore b/.gitignore
index c9dc77f..9b74880 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
*~
/*.patch
+*.d
*.o
*.o[ls]
diff --git a/src/Makefile b/src/Makefile
index f19d45e..0e04986 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -43,19 +43,20 @@ else
liburing_srcs += syscall.c
endif
+override CPPFLAGS += -MT "$@" -MMD -MP -MF "$@.d"
liburing_objs := $(patsubst %.c,%.ol,$(liburing_srcs))
liburing_sobjs := $(patsubst %.c,%.os,$(liburing_srcs))
-$(liburing_srcs): syscall.h lib.h
-
-$(liburing_objs) $(liburing_sobjs): include/liburing/io_uring.h
-
%.os: %.c
$(QUIET_CC)$(CC) $(CPPFLAGS) $(SO_CFLAGS) -c -o $@ $<
%.ol: %.c
$(QUIET_CC)$(CC) $(CPPFLAGS) $(L_CFLAGS) -c -o $@ $<
+# Include compiler generated dependency files.
+-include $(liburing_objs:%=%.d)
+-include $(liburing_sobjs:%=%.d)
+
AR ?= ar
RANLIB ?= ranlib
liburing.a: $(liburing_objs)
@@ -78,11 +79,9 @@ ifeq ($(ENABLE_SHARED),1)
ln -sf $(relativelibdir)$(libname) $(libdevdir)/liburing.so
endif
-$(liburing_objs): include/liburing.h
-
clean:
@rm -f $(all_targets) $(liburing_objs) $(liburing_sobjs) $(soname).new
- @rm -f *.so* *.a *.o
+ @rm -f *.so* *.a *.o *.d
@rm -f include/liburing/compat.h
@# When cleaning, we don't include ../config-host.mak,
--
2.25.1
