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Diffstat (limited to 'gprof/gprof.texi')
| -rw-r--r-- | gprof/gprof.texi | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gprof/gprof.texi b/gprof/gprof.texi index f389087..1f86383 100644 --- a/gprof/gprof.texi +++ b/gprof/gprof.texi @@ -325,6 +325,20 @@ example: ld -o myprog /lib/gcrt0.o myprog.o utils.o -lc_p @end example +If you are running the program on a system which supports shared +libraries you may run into problems with the profiling support code in +a shared library being called before that library has been fully +initialised. This is usually detected by the program encountering a +segmentation fault as soon as it is run. The solution is to link +against a static version of the library containing the profiling +support code, which for @code{gcc} users can be done via the +@samp{-static} or @samp{-static-libgcc} command line option. For +example: + +@example +gcc -g -pg -static-libgcc myprog.c utils.c -o myprog +@end example + If you compile only some of the modules of the program with @samp{-pg}, you can still profile the program, but you won't get complete information about the modules that were compiled without @samp{-pg}. The only information |