It might be helpful starting with the exact compile command line used by “make” on lib/my_library.c, it will have all the right include directory options you are missing from your gcc command line that might have an effect.
Given that your successful gcc line misses all the “-I” directives, I suspect you are not including <config.h> as the first include in your my_library.c? You could start modifying the command line used by make towards your successful one one step at a time to figure out where the problem may be. Hope this helps, Jarno On Aug 5, 2014, at 8:22 AM, Jordi Palà <jordipalas...@gmail.com> wrote: > Dear all, > > We are testing a custom library that we want to include to > openvswitch. This library uses netlink and the -DCONFIG_LIBNL20 > compilation flag. > > We can compile the library standalone and it works, but when we add it > to openvswitch the compilation crashes. > > The way we add the library to openvswicth is the following: > > 1) In lib/automake.mk we add: > > lib_libopenvswitch_la_CFLAGS=-DCONFIG_LIBNL20 > > lib_libopenvswitch_la_SOURCES = \ > ... > lib/my_library.c \ > lib/my_library.h > > 2) However, when compiling we get the following error > > In file included from /usr/include/linux/rtnetlink.h:8:0, > from /usr/include/netlink/netlink.h:26, > from /usr/include/netlink/genl/genl.h:15, > from lib/my_library.h:21, > from lib/my_library.c:1: > /usr/include/linux/neighbour.h:11:2: error: unknown type name '__s32' > > /usr/include/linux/neighbour.h includes /usr/include/linux/types.h who > should be able to find the type __s32. Indeed the chain of includes in > /usr/include/ should be: > > neighbour.h --> <asm/types.h> --> (I assume this translates into > asm-generic/types.h) --> <asm-generic/int-ll64.h> ---> __s32 is > defined here. > > What puzzles me is that if we compile the library outside openvswitch > everything works fine, and /usr/include/linux/neighbour.h can find the > type. This is the compilation command that works from outside > openvswitch: > > gcc -O2 -g -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs > -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration > -DCONFIG_LIBNL20 -c -o my_library.o my_library.c > > Any help is appreciated. > > Best Regards > > Jordi Pala > _______________________________________________ > dev mailing list > dev@openvswitch.org > http://openvswitch.org/mailman/listinfo/dev _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
