[Bug other/42756] New: Build fails if gold is used as linker and some libraries reside is /usr/local/lib

["aanisimov at inbox dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

I have PPL and CLooG installed in /usr/local/lib.

The configure script finds these two libraries and generates makefiles that
link with them simply by adding -lppl_c -lppl -lcloog. For example,

i686-slackware-linux-gcc  -g -fkeep-inline-functions -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   -DHAVE_CONFIG_H 
-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  libbackend.a ../libcpp/libcpp.a
../libdecnumber/libdecnumber.a ../libcpp/libcpp.a   ../libiberty/libiberty.a
../libdecnumber/libdecnumber.a  -lcloog  -lppl_c -lppl -lgmpxx
-L/home/artem/testing/gcc-build/./gmp/.libs
-L/home/artem/testing/gcc-build/./mpfr/.libs -lmpc -lmpfr -lgmp -rdynamic -ldl 
-lz -lelf

This works well when GNU ld is used, because it can be taught to look for
libraries in /usr/local/bin by editing /etc/ld.so.conf.

However, GNU gold doesn't have such an option and requires that all library
paths be passed in the command line explicitly (at least a brief look at
options.cc shows no other way to specify additional library paths).

The program can be partially resolved by saying LDFLAGS=-L/usr/local/lib
../gcc/configure ......, which makes stage1 compiler to build successfully.
However, building stage2 compiler fails because -L/usr/local/lib does not get
added to the command line during compilation of stage2.

I used the following options to configure GCC:

../gcc/configure --prefix=/usr/local/gcc-current
--libdir=/usr/local/gcc-current/lib --enable-shared --enable-bootstrap
--enable-languages=c,c++ --enable-threads=posix --enable-checking=release
--with-system-zlib --disable-libunwind-exceptions --enable-__cxa_atexit
--enable-libssp --enable-gold --enable-lto --verbose --with-arch=i686
--target=i686-slackware-linux --build=i686-slackware-linux
--host=i686-slackware-linux


-- 
           Summary: Build fails if gold is used as linker and some libraries
                    reside is /usr/local/lib
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: aanisimov at inbox dot ru
 GCC build triplet: i686-slackware-linux
  GCC host triplet: i686-slackware-linux
GCC target triplet: i686-slackware-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42756