I'm working on a shared library, and would like to build it with
-fprofile-generate information generated from tests that are built with the
library, so I can apply it with -fprofile-use. However, when I build the
library with CFLAGS='-O2 -g -fprofile-generate', it fails to link the tests
with the library:
gcc -pthread -I/opt/gnome/include/glib-2.0 -I/opt/gnome/lib/glib-2.0/include
-Wall -I../flow -O2 -g -Wall -Wextra -Wno-unused-parameter -Wmissing-prototypes
-Wstrict-prototypes -fprofile-generate -o .libs/benchmark-propagation
benchmark-propagation.o ../flow/.libs/libflow.so -L/opt/gnome/lib
/opt/gnome/lib/libgobject-2.0.so /opt/gnome/lib/libgthread-2.0.so -lpthread
/opt/gnome/lib/libglib-2.0.so
/usr/lib/gcc/i586-suse-linux/4.1.0/../../../../i586-suse-linux/bin/ld:
.libs/benchmark-propagation: hidden symbol `__gcov_init' in
/usr/lib/gcc/i586-suse-linux/4.1.0/libgcov.a(_gcov.o) is referenced by DSO
/usr/lib/gcc/i586-suse-linux/4.1.0/../../../../i586-suse-linux/bin/ld: final
link failed: Nonrepresentable section on output
collect2: ld returned 1 exit status
I've tried this with the GCC version 4.1.0 on Fedora Core 4 with the same
result. If profiling DSOs is impossible, maybe the documentation for
-fprofile-generate should state that.
--
Summary: Cannot generate profile information for DSO
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov/profile
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: hpj at copyleft dot no
GCC build triplet: i686-suse-linux
GCC host triplet: i686-suse-linux
GCC target triplet: i686-suse-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27545
