Re: libtool does not add stdc++ when linking on Linux

[Christian Thalinger]

On Thu, 2008-06-19 at 12:16 +0200, Ralf Wildenhues wrote:
> * Christian Thalinger wrote on Thu, Jun 19, 2008 at 11:58:13AM CEST:
> > 
> > Btw. here is the link command of the libvm.a and the libvm.la:
> 
> Is missing '-rpath $(libdir)', thus only a convenience archive.  IOW,
> did you use noinst_LTLIBRARIES instead of lib_LTLIBRARIES?

Yes, that's right, it a convenience library.

> 
> You do mention a real issue however, independently of above.  Please
> post output of
>   ../../libtool --tag=CXX --config
>   : >a.cc
>   g++ -v -o a a.cc

OK, here we go:

$ ../../libtool --tag=CXX --config

# A sed program that does not truncate output.
SED="/bin/sed"

# Sed that helps us avoid accidentally triggering echo(1) options like -n.
Xsed="$SED -e 1s/^X//"

# A grep program that handles long lines.
GREP="/bin/grep"

# An ERE matcher.
EGREP="/bin/grep -E"

# A literal string matcher.
FGREP="/bin/grep -F"

# Which release of libtool.m4 was used?
macro_version=2.2.4
macro_revision=1.2976

# Whether or not to build shared libraries.
build_libtool_libs=yes

# Whether or not to build static libraries.
build_old_libs=no

# What type of objects to build.
pic_mode=default

# Whether or not to optimize for fast installation.
fast_install=yes

# The host system.
host_alias=
host=x86_64-unknown-linux-gnu
host_os=linux-gnu

# The build system.
build_alias=
build=x86_64-unknown-linux-gnu
build_os=linux-gnu

# A BSD- or MS-compatible name lister.
NM="/usr/bin/nm -B"

# Whether we need soft or hard links.
LN_S="ln -s"

# What is the maximum length of a command?
max_cmd_len=98304

# Object file suffix (normally "o").
objext=o

# Executable file suffix (normally "").
exeext=

# whether the shell understands "unset".
lt_unset=unset

# turn spaces into newlines.
SP2NL="tr \\040 \\012"

# turn newlines into spaces.
NL2SP="tr \\015\\012 \\040\\040"

# How to create reloadable object files.
reload_flag=" -r"
reload_cmds="\$LD\$reload_flag -o \$output\$reload_objs"

# Method to check whether dependent libraries are shared objects.
deplibs_check_method="pass_all"

# Command to use when deplibs_check_method == "file_magic".
file_magic_cmd="\$MAGIC_CMD"

# The archiver.
AR="ar"
AR_FLAGS="cru"

# A symbol stripping program.
STRIP="strip"

# Commands used to install an old-style archive.
RANLIB="ranlib"
old_postinstall_cmds="chmod 644 \$oldlib~\$RANLIB \$oldlib"
old_postuninstall_cmds=""

# A C compiler.
LTCC="gcc"

# LTCC compiler flags.
LTCFLAGS=""

# Take the output of nm and produce a listing of raw symbols and C names.
global_symbol_pipe="sed -n -e 's/^.*[    ]\\([ABCDGIRSTW][ABCDGIRSTW]*\\)[      
 ][      ]*\\([_A-Za-z][_A-Za-z0-9]*\\)\$/\\1 \\2 \\2/p'"

# Transform the output of nm in a proper C declaration.
global_symbol_to_cdecl="sed -n -e 's/^T .* \\(.*\\)\$/extern int \\1();/p' -e 
's/^[ABCDGIRSTW]* .* \\(.*\\)\$/extern char \\1;/p'"

# Transform the output of nm in a C name address pair.
global_symbol_to_c_name_address="sed -n -e 's/^: \\([^ ]*\\) \$/  {\\\"\\1\\\", 
(void *) 0},/p' -e 's/^[ABCDGIRSTW]* \\([^ ]*\\) \\([^ ]*\\)\$/  {\"\\2\", 
(void *) \\&\\2},/p'"

# Transform the output of nm in a C name address pair when lib prefix is needed.
global_symbol_to_c_name_address_lib_prefix="sed -n -e 's/^: \\([^ ]*\\) \$/  
{\\\"\\1\\\", (void *) 0},/p' -e 's/^[ABCDGIRSTW]* \\([^ ]*\\) \\(lib[^ 
]*\\)\$/  {\"\\2\", (void *) \\&\\2},/p' -e 's/^[ABCDGIRSTW]* \\([^ ]*\\) \\([^ 
]*\\)\$/  {\"lib\\2\", (void *) \\&\\2},/p'"

# The name of the directory that contains temporary libtool files.
objdir=.libs

# Shell to use when invoking shell scripts.
SHELL="/bin/sh"

# An echo program that does not interpret backslashes.
ECHO="echo"

# Used to examine libraries when file_magic_cmd begins with "file".
MAGIC_CMD=file

# Must we lock files when doing compilation?
need_locks="no"

# Tool to manipulate archived DWARF debug symbol files on Mac OS X.
DSYMUTIL=""

# Tool to change global to local symbols on Mac OS X.
NMEDIT=""

# Tool to manipulate fat objects and archives on Mac OS X.
LIPO=""

# ldd/readelf like tool for Mach-O binaries on Mac OS X.
OTOOL=""

# ldd/readelf like tool for 64 bit Mach-O binaries on Mac OS X 10.4.
OTOOL64=""

# Old archive suffix (normally "a").
libext=a

# Shared library suffix (normally ".so").
shrext_cmds=".so"

# The commands to extract the exported symbol list from a shared archive.
extract_expsyms_cmds=""

# Variables whose values should be saved in libtool wrapper scripts and
# restored at link time.
variables_saved_for_relink="PATH LD_LIBRARY_PATH LD_RUN_PATH GCC_EXEC_PREFIX 
COMPILER_PATH LIBRARY_PATH"

# Do we need the "lib" prefix for modules?
need_lib_prefix=no

# Do we need a version for libraries?
need_version=no

# Library versioning type.
version_type=linux

# Shared library runtime path variable.
runpath_var=LD_RUN_PATH

# Shared library path variable.
shlibpath_var=LD_LIBRARY_PATH

# Is shlibpath searched before the hard-coded library search path?
shlibpath_overrides_runpath=no

# Format of library name prefix.
libname_spec="lib\$name"

# List of archive names.  First name is the real one, the rest are links.
# The last name is the one that the linker finds with -lNAME
library_names_spec="\${libname}\${release}\${shared_ext}\$versuffix 
\${libname}\${release}\${shared_ext}\$major \$libname\${shared_ext}"

# The coded name of the library, if different from the real name.
soname_spec="\${libname}\${release}\${shared_ext}\$major"

# Command to use after installation of a shared archive.
postinstall_cmds=""

# Command to use after uninstallation of a shared archive.
postuninstall_cmds=""

# Commands used to finish a libtool library installation in a directory.
finish_cmds="PATH=\\\"\\\$PATH:/sbin\\\" ldconfig -n \$libdir"

# As "finish_cmds", except a single script fragment to be evaled but
# not shown.
finish_eval=""

# Whether we should hardcode library paths into libraries.
hardcode_into_libs=yes

# Compile-time system search path for libraries.
sys_lib_search_path_spec="/usr/lib/gcc/x86_64-linux-gnu/4.1.2 /usr/lib64 /lib64"

# Run-time system search path for libraries.
sys_lib_dlsearch_path_spec="/lib /usr/lib /usr/local/lib /usr/local/lib64 
/usr/local/lib32 /lib/x86_64-linux-gnu /usr/lib/x86_64-linux-gnu "

# Whether dlopen is supported.
dlopen_support=yes

# Whether dlopen of programs is supported.
dlopen_self=yes

# Whether dlopen of statically linked programs is supported.
dlopen_self_static=no

# Commands to strip libraries.
old_striplib="strip --strip-debug"
striplib="strip --strip-unneeded"


# The linker used to build libraries.
LD="/usr/bin/ld -m elf_x86_64"

# Commands used to build an old-style archive.
old_archive_cmds="\$AR \$AR_FLAGS \$oldlib\$oldobjs~\$RANLIB \$oldlib"

# A language specific compiler.
CC="gcc"

# Is the compiler the GNU compiler?
with_gcc=yes

# Compiler flag to turn off builtin functions.
no_builtin_flag=" -fno-builtin"

# How to pass a linker flag through the compiler.
wl="-Wl,"

# Additional compiler flags for building library objects.
pic_flag=" -fPIC -DPIC"

# Compiler flag to prevent dynamic linking.
link_static_flag="-static"

# Does compiler simultaneously support -c and -o options?
compiler_c_o="yes"

# Whether or not to add -lc for building shared libraries.
build_libtool_need_lc=no

# Whether or not to disallow shared libs when runtime libs are static.
allow_libtool_libs_with_static_runtimes=no

# Compiler flag to allow reflexive dlopens.
export_dynamic_flag_spec="\${wl}--export-dynamic"

# Compiler flag to generate shared objects directly from archives.
whole_archive_flag_spec="\${wl}--whole-archive\$convenience 
\${wl}--no-whole-archive"

# Whether the compiler copes with passing no objects directly.
compiler_needs_object="no"

# Create an old-style archive from a shared archive.
old_archive_from_new_cmds=""

# Create a temporary old-style archive to link instead of a shared archive.
old_archive_from_expsyms_cmds=""

# Commands used to build a shared archive.
archive_cmds="\$CC -shared \$libobjs \$deplibs \$compiler_flags \${wl}-soname 
\$wl\$soname -o \$lib"
archive_expsym_cmds="echo \\\"{ global:\\\" > \$output_objdir/\$libname.ver~
            cat \$export_symbols | sed -e \\\"s/\\\\(.*\\\\)/\\\\1;/\\\" >> 
\$output_objdir/\$libname.ver~
            echo \\\"local: *; };\\\" >> \$output_objdir/\$libname.ver~
            \$CC -shared \$libobjs \$deplibs \$compiler_flags \${wl}-soname 
\$wl\$soname \${wl}-version-script \${wl}\$output_objdir/\$libname.ver -o \$lib"

# Commands used to build a loadable module if different from building
# a shared archive.
module_cmds=""
module_expsym_cmds=""

# Whether we are building with GNU ld or not.
with_gnu_ld="yes"

# Flag that allows shared libraries with undefined symbols to be built.
allow_undefined_flag=""

# Flag that enforces no undefined symbols.
no_undefined_flag=""

# Flag to hardcode $libdir into a binary during linking.
# This must work even if $libdir does not exist
hardcode_libdir_flag_spec="\${wl}-rpath \${wl}\$libdir"

# If ld is used when linking, flag to hardcode $libdir into a binary
# during linking.  This must work even if $libdir does not exist.
hardcode_libdir_flag_spec_ld=""

# Whether we need a single "-rpath" flag with a separated argument.
hardcode_libdir_separator=""

# Set to "yes" if using DIR/libNAME${shared_ext} during linking hardcodes
# DIR into the resulting binary.
hardcode_direct=no

# Set to "yes" if using DIR/libNAME${shared_ext} during linking hardcodes
# DIR into the resulting binary and the resulting library dependency is
# "absolute",i.e impossible to change by setting ${shlibpath_var} if the
# library is relocated.
hardcode_direct_absolute=no

# Set to "yes" if using the -LDIR flag during linking hardcodes DIR
# into the resulting binary.
hardcode_minus_L=no

# Set to "yes" if using SHLIBPATH_VAR=DIR during linking hardcodes DIR
# into the resulting binary.
hardcode_shlibpath_var=unsupported

# Set to "yes" if building a shared library automatically hardcodes DIR
# into the library and all subsequent libraries and executables linked
# against it.
hardcode_automatic=no

# Set to yes if linker adds runtime paths of dependent libraries
# to runtime path list.
inherit_rpath=no

# Whether libtool must link a program against all its dependency libraries.
link_all_deplibs=unknown

# Fix the shell variable $srcfile for the compiler.
fix_srcfile_path=""

# Set to "yes" if exported symbols are required.
always_export_symbols=no

# The commands to list exported symbols.
export_symbols_cmds="\$NM \$libobjs \$convenience | \$global_symbol_pipe | 
\$SED 's/.* //' | sort | uniq > \$export_symbols"

# Symbols that should not be listed in the preloaded symbols.
exclude_expsyms="_GLOBAL_OFFSET_TABLE_|_GLOBAL__F[ID]_.*"

# Symbols that must always be exported.
include_expsyms=""

# Commands necessary for linking programs (against libraries) with templates.
prelink_cmds=""

# Specify filename containing input files.
file_list_spec=""

# How to hardcode a shared library path into an executable.
hardcode_action=immediate

# The directories searched by this compiler when creating a shared library.
compiler_lib_search_dirs=""

# Dependencies to place before and after the objects being linked to
# create a shared library.
predep_objects=""
postdep_objects=""
predeps=""
postdeps=""

# The library search path used internally by the compiler when linking
# a shared library.
compiler_lib_search_path=""

# ### BEGIN LIBTOOL TAG CONFIG: CXX

# The linker used to build libraries.
LD="/usr/bin/ld -m elf_x86_64"

# Commands used to build an old-style archive.
old_archive_cmds="\$AR \$AR_FLAGS \$oldlib\$oldobjs~\$RANLIB \$oldlib"

# A language specific compiler.
CC="g++"

# Is the compiler the GNU compiler?
with_gcc=yes

# Compiler flag to turn off builtin functions.
no_builtin_flag=" -fno-builtin"

# How to pass a linker flag through the compiler.
wl="-Wl,"

# Additional compiler flags for building library objects.
pic_flag=" -fPIC -DPIC"

# Compiler flag to prevent dynamic linking.
link_static_flag="-static"

# Does compiler simultaneously support -c and -o options?
compiler_c_o="yes"

# Whether or not to add -lc for building shared libraries.
build_libtool_need_lc=no

# Whether or not to disallow shared libs when runtime libs are static.
allow_libtool_libs_with_static_runtimes=no

# Compiler flag to allow reflexive dlopens.
export_dynamic_flag_spec="\${wl}--export-dynamic"

# Compiler flag to generate shared objects directly from archives.
whole_archive_flag_spec="\${wl}--whole-archive\$convenience 
\${wl}--no-whole-archive"

# Whether the compiler copes with passing no objects directly.
compiler_needs_object="no"

# Create an old-style archive from a shared archive.
old_archive_from_new_cmds=""

# Create a temporary old-style archive to link instead of a shared archive.
old_archive_from_expsyms_cmds=""

# Commands used to build a shared archive.
archive_cmds="\$CC -shared -nostdlib \$predep_objects \$libobjs \$deplibs 
\$postdep_objects \$compiler_flags \${wl}-soname \$wl\$soname -o \$lib"
archive_expsym_cmds="\$CC -shared -nostdlib \$predep_objects \$libobjs 
\$deplibs \$postdep_objects \$compiler_flags \${wl}-soname \$wl\$soname 
\${wl}-retain-symbols-file \$wl\$export_symbols -o \$lib"

# Commands used to build a loadable module if different from building
# a shared archive.
module_cmds=""
module_expsym_cmds=""

# Whether we are building with GNU ld or not.
with_gnu_ld="yes"

# Flag that allows shared libraries with undefined symbols to be built.
allow_undefined_flag=""

# Flag that enforces no undefined symbols.
no_undefined_flag=""

# Flag to hardcode $libdir into a binary during linking.
# This must work even if $libdir does not exist
hardcode_libdir_flag_spec="\${wl}-rpath \${wl}\$libdir"

# If ld is used when linking, flag to hardcode $libdir into a binary
# during linking.  This must work even if $libdir does not exist.
hardcode_libdir_flag_spec_ld=""

# Whether we need a single "-rpath" flag with a separated argument.
hardcode_libdir_separator=""

# Set to "yes" if using DIR/libNAME${shared_ext} during linking hardcodes
# DIR into the resulting binary.
hardcode_direct=no

# Set to "yes" if using DIR/libNAME${shared_ext} during linking hardcodes
# DIR into the resulting binary and the resulting library dependency is
# "absolute",i.e impossible to change by setting ${shlibpath_var} if the
# library is relocated.
hardcode_direct_absolute=no

# Set to "yes" if using the -LDIR flag during linking hardcodes DIR
# into the resulting binary.
hardcode_minus_L=no

# Set to "yes" if using SHLIBPATH_VAR=DIR during linking hardcodes DIR
# into the resulting binary.
hardcode_shlibpath_var=unsupported

# Set to "yes" if building a shared library automatically hardcodes DIR
# into the library and all subsequent libraries and executables linked
# against it.
hardcode_automatic=no

# Set to yes if linker adds runtime paths of dependent libraries
# to runtime path list.
inherit_rpath=no

# Whether libtool must link a program against all its dependency libraries.
link_all_deplibs=unknown

# Fix the shell variable $srcfile for the compiler.
fix_srcfile_path=""

# Set to "yes" if exported symbols are required.
always_export_symbols=no

# The commands to list exported symbols.
export_symbols_cmds="\$NM \$libobjs \$convenience | \$global_symbol_pipe | 
\$SED 's/.* //' | sort | uniq > \$export_symbols"

# Symbols that should not be listed in the preloaded symbols.
exclude_expsyms="_GLOBAL_OFFSET_TABLE_|_GLOBAL__F[ID]_.*"

# Symbols that must always be exported.
include_expsyms=""

# Commands necessary for linking programs (against libraries) with templates.
prelink_cmds=""

# Specify filename containing input files.
file_list_spec=""

# How to hardcode a shared library path into an executable.
hardcode_action=immediate

# The directories searched by this compiler when creating a shared library.
compiler_lib_search_dirs="/usr/lib/gcc/x86_64-linux-gnu/4.1.2 
/usr/lib/gcc/x86_64-linux-gnu/4.1.2 
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../lib64 /lib/../lib64 
/usr/lib/../lib64"

# Dependencies to place before and after the objects being linked to
# create a shared library.
predep_objects="/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../lib64/crti.o 
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/crtbeginS.o"
postdep_objects="/usr/lib/gcc/x86_64-linux-gnu/4.1.2/crtendS.o 
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../lib64/crtn.o"
predeps=""
postdeps="-lstdc++ -lm -lgcc_s -lc -lgcc_s"

# The library search path used internally by the compiler when linking
# a shared library.
compiler_lib_search_path="-L/usr/lib/gcc/x86_64-linux-gnu/4.1.2 
-L/usr/lib/gcc/x86_64-linux-gnu/4.1.2 
-L/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../lib64 -L/lib/../lib64 
-L/usr/lib/../lib64"

# ### END LIBTOOL TAG CONFIG: CXX



$ : > a.cc
$ g++ -v -o a a.cc
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v 
--enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr 
--enable-shared --with-system-zlib --libexecdir=/usr/lib 
--without-included-gettext --enable-threads=posix --enable-nls 
--program-suffix=-4.1 --enable-__cxa_atexit --enable-clocale=gnu 
--enable-libstdcxx-debug --enable-mpfr --enable-checking=release 
x86_64-linux-gnu
Thread model: posix
gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)
 /usr/lib/gcc/x86_64-linux-gnu/4.1.2/cc1plus -quiet -v -D_GNU_SOURCE a.cc 
-quiet -dumpbase a.cc -mtune=k8 -auxbase a -version -o /tmp/ccK1goHH.s
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory 
"/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../x86_64-linux-gnu/include"
ignoring nonexistent directory "/usr/include/x86_64-linux-gnu"
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../include/c++/4.1.2
 
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../include/c++/4.1.2/x86_64-linux-gnu
 /usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../include/c++/4.1.2/backward
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/4.1.2/include
 /usr/include
End of search list.
GNU C++ version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21) (x86_64-linux-gnu)
        compiled by GNU C version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 632603bce5ef3f84603416b58939d0f7
 as -V -Qy -o /tmp/ccsJOFli.o /tmp/ccK1goHH.s
GNU assembler version 2.17 (x86_64-linux-gnu) using BFD version 2.17 Debian 
GNU/Linux
 /usr/lib/gcc/x86_64-linux-gnu/4.1.2/collect2 --eh-frame-hdr -m elf_x86_64 
-dynamic-linker /lib64/ld-linux-x86-64.so.2 -o a 
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../lib64/crt1.o 
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../lib64/crti.o 
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/crtbegin.o 
-L/usr/lib/gcc/x86_64-linux-gnu/4.1.2 -L/usr/lib/gcc/x86_64-linux-gnu/4.1.2 
-L/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../lib64 -L/lib/../lib64 
-L/usr/lib/../lib64 /tmp/ccsJOFli.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s 
-lgcc /usr/lib/gcc/x86_64-linux-gnu/4.1.2/crtend.o 
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../lib64/crtn.o
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../lib64/crt1.o: In function 
`_start':
../sysdeps/x86_64/elf/start.S:109: undefined reference to `main'
collect2: ld returned 1 exit status