[Bug bootstrap/40928] New: build failure w/ -Wl,--as-needed - undefined references in plugin.c

[Bug bootstrap/40928] New: build failure w/ -Wl,--as-needed - undefined references in plugin.c

[dirtyepic at gentoo dot org]

With current trunk (r150327, but has been broken for a couple months at least)
bootstrap fails if LDFLAGS contains -Wl,--as-needed.

x86_64-unknown-linux-gnu-gcc  -O -DIN_GCC   -W -Wall -Wwrite-strings
-Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute
-pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings
-Wold-style-definition -Wc++-compat -fno-common  -DHAVE_CONFIG_H
-Wl,--as-needed -Wl,--hash-style=gnu -o cc1-dummy c-lang.o stub-objc.o
attribs.o c-errors.o c-lex.o c-pragma.o c-decl.o c-typeck.o c-convert.o
c-aux-info.o c-common.o c-opts.o c-format.o c-semantics.o c-ppoutput.o
c-cppbuiltin.o c-objc-common.o c-dump.o c-pch.o c-parser.o i386-c.o
c-gimplify.o tree-mudflap.o c-pretty-print.o c-omp.o \      
   dummy-checksum.o main.o tree-browser.o libbackend.a ../libcpp/libcpp.a
../libdecnumber/libdecnumber.a ../libcpp/libcpp.a   ../libiberty/libiberty.a
../libdecnumber/libdecnumber.a  -Lyes/lib -lcloog -Lyes/lib -lppl_c -lppl
-lgmpxx -lmpc -lmpfr -lgmp -rdynamic
libbackend.a(plugin.o): In function `init_one_plugin':
plugin.c:(.text+0x447): undefined reference to `dlopen'
plugin.c:(.text+0x454): undefined reference to `dlerror'
plugin.c:(.text+0x474): undefined reference to `dlerror'
plugin.c:(.text+0x483): undefined reference to `dlsym'
plugin.c:(.text+0x48d): undefined reference to `dlerror'
plugin.c:(.text+0x4b5): undefined reference to `dlsym'
plugin.c:(.text+0x4bd): undefined reference to `dlerror'
collect2: ld returned 1 exit status
make[3]: *** [cc1-dummy] Error 1
rm gfdl.pod cpp.pod gcc.pod gcov.pod fsf-funding.pod
make[3]: Leaving directory
`/var/tmp/portage/sys-devel/gcc-4.5.0_pre9999/work/build/gcc'
make[2]: *** [all-stage1-gcc] Error 2
make[2]: Leaving directory
`/var/tmp/portage/sys-devel/gcc-4.5.0_pre9999/work/build'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory
`/var/tmp/portage/sys-devel/gcc-4.5.0_pre9999/work/build'
make: *** [bootstrap] Error 2


/var/tmp/portage/sys-devel/gcc-4.5.0_pre9999/work/gcc-4.5.0-9999/configure
--prefix=/usr --bindir=/usr/x86_64-unknown-linux-gnu/gcc-bin/4.5.0-pre9999
--includedir=/usr/lib/gcc/x86_64-unknown-linux-gnu/4.5.0-pre9999/include
--datadir=/usr/share/gcc-data/x86_64-unknown-linux-gnu/4.5.0-pre9999
--mandir=/usr/share/gcc-data/x86_64-unknown-linux-gnu/4.5.0-pre9999/man
--infodir=/usr/share/gcc-data/x86_64-unknown-linux-gnu/4.5.0-pre9999/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-unknown-linux-gnu/4.5.0-pre9999/include/g++-v4
--host=x86_64-unknown-linux-gnu --build=x86_64-unknown-linux-gnu
--disable-altivec --disable-fixed-point --with-ppl --with-cloog --disable-nls
--with-system-zlib --disable-checking --disable-werror --enable-secureplt
--enable-multilib --disable-libmudflap --disable-libssp --enable-libgomp
--enable-cld --disable-libgcj --enable-languages=c,c++ --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--with-bugurl=http://bugs.gentoo.org/ --with-pkgversion=Gentoo SVN


-- 
           Summary: build failure w/ -Wl,--as-needed - undefined references
                    in plugin.c
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dirtyepic at gentoo dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40928

[Bug bootstrap/40928] build failure w/ -Wl,--as-needed - undefined references in plugin.c

[rwild at gcc dot gnu dot org]

------- Comment #1 from rwild at gcc dot gnu dot org  2009-09-27 06:49 -------
Subject: Bug 40928

Author: rwild
Date: Sun Sep 27 06:49:33 2009
New Revision: 152215

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=152215
Log:
Fix library dependencies for -Wl,--as-needed.

gcc/:
        PR bootstrap/40928
        * configure.ac: Use $LIBS for '-ldl', not $LDFLAGS.
        * configure: Regenerate.

libjava/:
        PR libgcj/38298
        * Makefile.am (libgcj_tools_la_LIBADD): Add '-lm'.
        * Makefile.in: Regenerate.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/configure
    trunk/gcc/configure.ac
    trunk/libjava/ChangeLog
    trunk/libjava/Makefile.am
    trunk/libjava/Makefile.in


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40928

[Bug bootstrap/40928] build failure w/ -Wl,--as-needed - undefined references in plugin.c

[rwild at gcc dot gnu dot org]

------- Comment #2 from rwild at gcc dot gnu dot org  2009-09-27 06:53 -------
Fixed


-- 

rwild at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rwild at gcc dot gnu dot org
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40928