Hi, On Wed, Nov 22, 2017 at 09:45:07AM +0100, Felix von Leitner wrote: > Good morning! > > I'm trying to debug an embedded Linux box that does not come with an > strace, so I figured I'd cross compile strace for it. It is not going so > well. Any help appreciated. > > First obstacle: > > mmsghdr.c:97:14: error: 'IOV_MAX' undeclared here (not in a function); did > you mean 'INT_MAX'? > int namelen[IOV_MAX]; > ^~~~~~~ > INT_MAX > > (This is gcc 7.1 for arm-linux-gnueabi, with binutils 2.29 and a freshly > compiled glibc 2.26). > > > So I add an > > #ifndef IOV_MAX > #define IOV_MAX 1024 > #endif > > Same issue in msghdr.c.
IOV_MAX *must* be provided by <limits.h>; if it isn't, then your cross-compiling environment is not quite functional. > So far so good, but the next one is stumping me: > > pathtrace.c: In function 'pathtrace_match_set': > pathtrace.c:166:7: error: 'SEN_dup2' undeclared (first use in this function); > did you mean 'sys_dup2'? > case SEN_dup2: > ^~~~~~~~ > sys_dup2 > pathtrace.c:166:7: note: each undeclared identifier is reported only once for > each function it appears in > pathtrace.c:167:7: error: 'SEN_dup3' undeclared (first use in this function); > did you mean 'SEN_dup2'? > case SEN_dup3: > ^~~~~~~~ > SEN_dup2 > > (and so on for dozens of syscalls). Where are these symbols supposed to come > from? What am I doing wrong? All these constants are generated during build, their definitions should be in sen.h file. > For the record: compiling strace natively for x86_64 works with the same > glibc. > Kernel headers are from Linux 4.14 for both ARM and x86_64. This configuration is among those I tested recently. -- ldv
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