http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46695
Summary: [4.6 regression] failure to build X from darwin to
cris-elf with lto enabled
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: ia...@gcc.gnu.org
with host = i686-darwin9
target = cris-elf
[current trunk = 167198]
configure:
Configured with: ../combined-trunk/configure --prefix=/GCC/cross
--with-libelf=/GCC/libelf/ --target=cris-elf --disable-nls
--enable-version-specific-runtime-libs --build=i686-apple-darwin9
--host=i686-apple-darwin9 --enable-sim
--enable-languages=c,c++,fortran,lto,objc,obj-c++
--with-gmp=/GCC/multiprec-math/x86 --with-mpfr=/GCC/multiprec-math/x86
--with-mpc=/GCC/multiprec-math/x86 CC=/GCC/current/bin/gcc-4.6trunk
CXX=/GCC/current/bin/g++-4.6trunk
fails:
/bin/sh ./libtool --tag=CC --mode=compile /GCC/current/bin/gcc-4.6trunk
-DHAVE_CONFIG_H -I. -I../../combined-trunk/lto-plugin
-I../../combined-trunk/lto-plugin/../include -DHAVE_CONFIG_H -Wall -Werror -g
-O2 -c -o lto-plugin.lo ../../combined-trunk/lto-plugin/lto-plugin.c
libtool: compile: /GCC/current/bin/gcc-4.6trunk -DHAVE_CONFIG_H -I.
-I../../combined-trunk/lto-plugin -I../../combined-trunk/lto-plugin/../include
-DHAVE_CONFIG_H -Wall -Werror -g -O2 -c
../../combined-trunk/lto-plugin/lto-plugin.c -fno-common -DPIC -o
.libs/lto-plugin.o
libtool: compile: /GCC/current/bin/gcc-4.6trunk -DHAVE_CONFIG_H -I.
-I../../combined-trunk/lto-plugin -I../../combined-trunk/lto-plugin/../include
-DHAVE_CONFIG_H -Wall -Werror -g -O2 -c
../../combined-trunk/lto-plugin/lto-plugin.c -o lto-plugin.o >/dev/null 2>&1
/bin/sh ./libtool --tag=CC --mode=link /GCC/current/bin/gcc-4.6trunk -Wall
-Werror -g -O2 -no-undefined -bindir /GCC/cross/libexec/gcc/cris-elf/4.6.0 -o
liblto_plugin.la -rpath /GCC/cross/libexec/gcc/cris-elf/4.6.0 lto-plugin.lo
../libiberty/pic/libiberty.a
*** Warning: Linking the shared library liblto_plugin.la against the
*** static library ../libiberty/pic/libiberty.a is not portable!
libtool: link: /GCC/current/bin/gcc-4.6trunk -dynamiclib -o
.libs/liblto_plugin.0.dylib .libs/lto-plugin.o ../libiberty/pic/libiberty.a
-install_name /GCC/cross/libexec/gcc/cris-elf/4.6.0/liblto_plugin.0.dylib
-compatibility_version 1 -current_version 1.0 -Wl,-single_module
Undefined symbols:
"_environ", referenced from:
_environ$non_lazy_ptr in libiberty.a(pex-unix.o)
_environ$non_lazy_ptr in libiberty.a(xmalloc.o)
ld: symbol(s) not found
collect2: ld returned 1 exit status
make[2]: *** [liblto_plugin.la] Error 1
make[1]: *** [all-lto-plugin] Error 2
make: *** [all] Error 2
===
This is attributed to the inclusion of
liblto_plugin_la_LDFLAGS = -no-undefined -bindir $(libexecsubdir) \
$(if $(wildcard
../libiberty/pic/libiberty.a),,-Wc,../libiberty/libiberty.a)
in lto-plugin/Makefile.am
====
works OK when the link is passed "-undefined dynamic_lookup" so that _environ
can be resolved from crt at load time.
