On 01/02/13 16:51, Rob Herring wrote: > On 02/01/2013 03:01 AM, Srinivas KANDAGATLA wrote: >> Hi Stephen, >> Not sure if you have already noticed this but, >> I did try this patch on my 3.8, and it looks like the intermediate dts >> file replaces all instances of linux with 1 because of predefined macros >> in gcc. >> As a result >> linux,stdout-path = "/soc/stm-asc2"; >> is changed to. >> 1,stdout-path = "/soc/stm-asc2"; >> >> On my version of compiler(gcc version 4.6.3) I have >> >> armv7-linux-gcc -E -dM - < /dev/null | grep -v _ >> #define unix 1 >> #define linux 1 >> >> Which might be true with most compiler versions aswell. >> As we are using linux as prefix for some device tree properties it makes >> sense to undef the linux gcc define. >> Adding -Ulinux to cmd_dtc_cpp should fix it. >> >> -cmd_dtc_cpp = $(CPP) $(cpp_flags) -D__DTS__ -x assembler-with-cpp -o >> $(dtc-tmp) $< ; \ >> +cmd_dtc_cpp = $(CPP) $(cpp_flags) -D__DTS__ -Ulinux -x >> assembler-with-cpp -o $(dtc-tmp) $< ; \ >> $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) $(dtc-tmp) > That's a hackish solution that seems fragile as well. Is there no way to > turn off all built-in defines? Yes, there is another option to turn of system-specific options and keep macros like __ASSEMBLER__
|-undef||(|Do not predefine any system-specific or GCC-specific macros. The standard predefined macros remain defined. See Standard Predefined Macros <http://gcc.gnu.org/onlinedocs/cpp/Standard-Predefined-Macros.html#Standard-Predefined-Macros>.) This option also worked for me. --srini > > Rob > _______________________________________________ > devicetree-discuss mailing list > [email protected] > https://lists.ozlabs.org/listinfo/devicetree-discuss >
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