On 11 May 2021 21:24:55 Segher Boessenkool <seg...@kernel.crashing.org> wrote:
Hi!
On Tue, May 11, 2021 at 02:48:12PM +1000, Alexey Kardashevskiy wrote:
--- a/arch/powerpc/kernel/vdso32/Makefile
+++ b/arch/powerpc/kernel/vdso32/Makefile
@@ -44,7 +44,7 @@ asflags-y := -D__VDSO32__ -s
obj-y += vdso32_wrapper.o
targets += vdso32.lds
-CPPFLAGS_vdso32.lds += -P -C -Upowerpc
+CPPFLAGS_vdso32.lds += -C
# link rule for the .so file, .lds has to be first
$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32)
$(obj)/vgettimeofday.o FORCE
--- a/arch/powerpc/kernel/vdso64/Makefile
+++ b/arch/powerpc/kernel/vdso64/Makefile
@@ -30,7 +30,7 @@ ccflags-y := -shared -fno-common -fno-builtin -nostdlib \
asflags-y := -D__VDSO64__ -s
targets += vdso64.lds
-CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
+CPPFLAGS_vdso64.lds += -C
# link rule for the .so file, .lds has to be first
$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64)
$(obj)/vgettimeofday.o FORCE
Why are you removing -P and -Upowerpc here? "powerpc" is a predefined
macro on powerpc-linux (no underscores or anything, just the bareword).
This is historical, like "unix" and "linux". If you use the C
preprocessor for things that are not C code (like the kernel does here)
you need to undefine these macros, if anything in the files you run
through the preprocessor contains those words, or funny / strange / bad
things will happen. Presumably at some time in the past it did contain
"powerpc" somewhere.
-P is to inhibit line number output. Whatever consumes the
preprocessor output will have to handle line directives if you remove
this flag. Did you check if this will work for everything that uses
$(CPP)?
i don't know about everything for sure but i checked few configs and in all
cases (except vdso) $CPP was receiving cflags.
In any case, please mention the reasoning (and the fact that you are
removing these flags!) in the commit message. Thanks!
but i did mention this, the last paragraph... they are duplicated.
Segher
