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| author | Nick Clifton <nickc@redhat.com> | 2009-01-03 10:00:58 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2009-01-03 10:00:58 +0000 |
| commit | c8d1c0af8062b171426f9dc64e895a39eb255146 (patch) | |
| tree | 8b541adfe444e76efd15884ba399d59e04c29cb2 | |
| parent | 4d78a120893392ff5feac12480e2bf94e3cc0dbb (diff) | |
| download | gdb-c8d1c0af8062b171426f9dc64e895a39eb255146.zip gdb-c8d1c0af8062b171426f9dc64e895a39eb255146.tar.gz gdb-c8d1c0af8062b171426f9dc64e895a39eb255146.tar.bz2 | |
PR 7099
* gprof.texi (Compiling): Mention the need for using
-static-libgcc on shared library systems.
| -rw-r--r-- | gprof/ChangeLog | 6 | ||||
| -rw-r--r-- | gprof/gprof.texi | 14 |
2 files changed, 20 insertions, 0 deletions
diff --git a/gprof/ChangeLog b/gprof/ChangeLog index 1d1f596..50b2ab2 100644 --- a/gprof/ChangeLog +++ b/gprof/ChangeLog @@ -1,3 +1,9 @@ +2009-01-03 Nick Clifton <nickc@redhat.com> + + PR 7099 + * gprof.texi (Compiling): Mention the need for using + -static-libgcc on shared library systems. + 2009-01-02 Nick Clifton <nickc@redhat.com> * po/id.po: Updated Indonesian translation. 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 |