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"Xiaogeng (Shawn) Jin" wrote: > I tried to use the cross gcc-2.95.3 that I built to compile > busybox-0.60.1 and have a very strange problem. > > I just followed the instructions > (http://billgatliff.com/twiki/bin/view/Crossgcc/BuildToolchainScript) > step by step to build my cross gcc (powerpc-linux). It looks successful. > But when using it to compile busybox-0.60.1's 'mount.c', I encountered > an error message > (http://www.geocities.com/shawnxjin/crossgcc/rs-bb.txt). It complains > that 'PATH_MAX' is not definied, which is defined in <linux/limits.h> ... Have a look at the busybox changlog. They have accepted patches to address this for some of their source files on systems where PATH_MAX is strangely defined not in limits.h but in sys/param.h. Here's the patch I use: http://www.kegel.com/linux/busybox_path_max.patch to get it to compile with Montavista Hard Hat Linux 2.0. If ELDK doesn't need that, great, it's more standards-compliant. > It seems to me that somehow > my cross gcc didn't define '_POSIX_SOURCE' or '_GNU_SOURCE', which is > supposed to be defined by user or compiler. I think you can strike the '... or compiler' from that. I haven't seen any compiler that defines those. > These two macros will turn > on '__USE_POSIX", which in turn includes <bits/posix1_lim.h> in > <limits.h>. The more strange thing is that even if I add > "-D_POSIX_SOURCE" or "_D_GNU_SOURCE", it doesn't work. I notice that busybox 0.60.2 turns on the -D_GNU_SOURCE flag in its Makefile, and I get PATH_MAX as expected. Maybe you should upgrade to the newer busybox... Oddly, when compiling #include <limits.h> echo path_max is PATH_MAX echo line_max is LINE_MAX with gcc -E, I now always get a value for both, even without -D_GNU_SOURCE Not sure why I needed to patch busybox. Oh, well... - Dan ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com
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