[Bug other/40708] New: libpthread not linked

["xenofears at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

I do believe this to be a regression from gcc 4.4.0. If --enable-threads is
used, pthread references appear to get auto-imported, -lpthread is not passed
to libgcc, and the build fails with undefined references to libpthread in
libgcc. This occurs in 32-bit multilib, as well, despite the presence of 32-bit
libpthread.a or in 64-bit (multilib disabled or not) libpthread.a or
libpthread.dll.a.


For example, in Cygwin, 32-bit libgcc:

gcc   -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -DNATIVE_CROSS  -W -Wall
-Wwrite-stri
ngs -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wmissing-format-attrib
ute -Wold-style-definition -fno-common  -DHAVE_CONFIG_H -Wl,--stack,8388608 -o
c
c1.exe c-lang.o stub-objc.o attribs.o c-errors.o c-lex.o c-pragma.o c-decl.o
c-t
ypeck.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
m
sformat-c.o c-gimplify.o tree-mudflap.o c-pretty-print.o c-omp.o \
          cc1-checksum.o main.o tree-browser.o libbackend.a ../libcpp/libcpp.a
.
./libdecnumber/libdecnumber.a ../libcpp/libcpp.a /usr/lib/libintl.a
/usr/lib/lib
iconv.a  ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a    -lmpc
-lmpfr
 -lgmp
/home/Peter/gcc-trunk/build-149397-20090607/./gcc/xgcc
-B/home/Peter/gcc-trunk/b
uild-149397-20090607/./gcc/
-L/home/Peter/gcc-trunk/build-149397-20090607/x86_64
-w64-mingw32/32/winsup/mingw
-L/home/Peter/gcc-trunk/build-149397-20090607/x86_6
4-w64-mingw32/32/winsup/w32api/lib -isystem
/home/Peter/gcc-trunk/winsup/mingw/i
nclude -isystem /home/Peter/gcc-trunk/winsup/w32api/include
-B/usr/x86_64-w64-mi
ngw32/bin/ -B/usr/x86_64-w64-mingw32/lib/ -isystem
/usr/x86_64-w64-mingw32/inclu
de -isystem /usr/x86_64-w64-mingw32/sys-include  -m32 -dumpspecs > tmp-specs
mv tmp-specs specs
/home/Peter/gcc-trunk/build-149397-20090607/./gcc/xgcc
-B/home/Peter/gcc-trunk/b
uild-149397-20090607/./gcc/
-L/home/Peter/gcc-trunk/build-149397-20090607/x86_64
-w64-mingw32/32/winsup/mingw
-L/home/Peter/gcc-trunk/build-149397-20090607/x86_6
4-w64-mingw32/32/winsup/w32api/lib -isystem
/home/Peter/gcc-trunk/winsup/mingw/i
nclude -isystem /home/Peter/gcc-trunk/winsup/w32api/include
-B/usr/x86_64-w64-mi
ngw32/bin/ -B/usr/x86_64-w64-mingw32/lib/ -isystem
/usr/x86_64-w64-mingw32/inclu
de -isystem /usr/x86_64-w64-mingw32/sys-include  -m32 -O2
-I../../gcc/../winsup/
w32api/include  -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -DNATIVE_CROSS  -W -Wall
-W
write-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-d
efinition  -isystem ./include   -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOA
T_NOT_NEEDED  -g \
                -msse -minline-all-stringops -c \
                ../../gcc/config/i386/crtfastmath.c \
                -o
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw3
2/32/libgcc/crtfastmath.o
make[1]: Leaving directory `/home/Peter/gcc-trunk/build-149397-20090607/gcc'
# Early copyback; see "all" above for the rationale.  The
# early copy is necessary so that the gcc -B options find
# the right startup files when linking shared libgcc.
/bin/sh ../../../../libgcc/../mkinstalldirs ../../.././gcc/32
parts="crtfastmath.o";                          \
        for file in $parts; do                                  \
          rm -f ../../.././gcc/32/$file;                \
          /usr/bin/install -c -m 644 $file ../../.././gcc/32/;  \
        done
{ /home/Peter/gcc-trunk/build-149397-20090607/./gcc/nm -pg _chkstk_s.o
_muldi3_s
.o _negdi2_s.o _lshrdi3_s.o _ashldi3_s.o _ashrdi3_s.o _cmpdi2_s.o _ucmpdi2_s.o
_
clear_cache_s.o _enable_execute_stack_s.o _trampoline_s.o __main_s.o
_absvsi2_s.
o _absvdi2_s.o _addvsi3_s.o _addvdi3_s.o _subvsi3_s.o _subvdi3_s.o _mulvsi3_s.o
_mulvdi3_s.o _negvsi2_s.o _negvdi2_s.o _ctors_s.o _ffssi2_s.o _ffsdi2_s.o
_clz_s
.o _clzsi2_s.o _clzdi2_s.o _ctzsi2_s.o _ctzdi2_s.o _popcount_tab_s.o
_popcountsi
2_s.o _popcountdi2_s.o _paritysi2_s.o _paritydi2_s.o _powisf2_s.o _powidf2_s.o
_
powixf2_s.o _powitf2_s.o _mulsc3_s.o _muldc3_s.o _mulxc3_s.o _multc3_s.o
_divsc3
_s.o _divdc3_s.o _divxc3_s.o _divtc3_s.o _bswapsi2_s.o _bswapdi2_s.o
_fixunssfsi
_s.o _fixunsdfsi_s.o _fixunsxfsi_s.o _fixsfdi_s.o _fixdfdi_s.o _fixxfdi_s.o
_fix
unssfdi_s.o _fixunsdfdi_s.o _fixunsxfdi_s.o _floatdisf_s.o _floatdidf_s.o
_float
dixf_s.o _floatundisf_s.o _floatundidf_s.o _floatundixf_s.o _divdi3_s.o
_moddi3_
s.o _udivdi3_s.o _umoddi3_s.o _udiv_w_sdiv_s.o _udivmoddi4_s.o addtf3_s.o
divtf3
_s.o eqtf2_s.o getf2_s.o letf2_s.o multf3_s.o negtf2_s.o subtf3_s.o
unordtf2_s.o
 fixtfsi_s.o fixunstfsi_s.o floatsitf_s.o floatunsitf_s.o fixtfdi_s.o
fixunstfdi
_s.o floatditf_s.o floatunditf_s.o extendsftf2_s.o extenddftf2_s.o
extendxftf2_s
.o trunctfsf2_s.o trunctfdf2_s.o trunctfxf2_s.o tf-signs_s.o unwind-dw2_s.o
unwi
nd-dw2-fde_s.o unwind-sjlj_s.o gthr-gnat_s.o unwind-c_s.o emutls_s.o; echo %%;
\

          cat ../../../../libgcc/../gcc/libgcc-std.ver  \
            | sed -e '/^[       ]*#/d' \
                  -e 's/^%\(if\|else\|elif\|endif\|define\)/#\1/' \
            | /home/Peter/gcc-trunk/build-149397-20090607/./gcc/xgcc
-B/home/Pet
er/gcc-trunk/build-149397-20090607/./gcc/
-L/home/Peter/gcc-trunk/build-149397-2
0090607/x86_64-w64-mingw32/32/winsup/mingw
-L/home/Peter/gcc-trunk/build-149397-
20090607/x86_64-w64-mingw32/32/winsup/w32api/lib -isystem
/home/Peter/gcc-trunk/
winsup/mingw/include -isystem /home/Peter/gcc-trunk/winsup/w32api/include
-B/usr
/x86_64-w64-mingw32/bin/ -B/usr/x86_64-w64-mingw32/lib/ -isystem
/usr/x86_64-w64
-mingw32/include -isystem /usr/x86_64-w64-mingw32/sys-include  -m32 -g -O2
-I../
../gcc/../winsup/w32api/include -g  -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE
-DNATIV
E_CROSS  -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prot
otypes -Wold-style-definition  -isystem ./include   -g -DHAVE_GTHR_DEFAULT
-DIN_
LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../../.././gcc
-I../../../../libgcc
 -I../../../../libgcc/. -I../../../../libgcc/../gcc
-I../../../../libgcc/../incl
ude  -DHAVE_CC_TLS -E -xassembler-with-cpp -; \
        } | gawk -f ../../../../libgcc/../gcc/mkmap-flat.awk  -v
pe_dll=libgcc_s
_sjlj-1.dll > tmp-libgcc.map
mv tmp-libgcc.map libgcc.map
# @multilib_flags@ is still needed because this may use
# /home/Peter/gcc-trunk/build-149397-20090607/./gcc/xgcc
-B/home/Peter/gcc-trunk
/build-149397-20090607/./gcc/
-L/home/Peter/gcc-trunk/build-149397-20090607/x86_
64-w64-mingw32/32/winsup/mingw
-L/home/Peter/gcc-trunk/build-149397-20090607/x86
_64-w64-mingw32/32/winsup/w32api/lib -isystem
/home/Peter/gcc-trunk/winsup/mingw
/include -isystem /home/Peter/gcc-trunk/winsup/w32api/include
-B/usr/x86_64-w64-
mingw32/bin/ -B/usr/x86_64-w64-mingw32/lib/ -isystem
/usr/x86_64-w64-mingw32/inc
lude -isystem /usr/x86_64-w64-mingw32/sys-include  -m32 and -O2
-I../../gcc/../w
insup/w32api/include -g  -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -DNATIVE_CROSS 
-W
 -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wol
d-style-definition  -isystem ./include   -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D_
_GCC_FLOAT_NOT_NEEDED  directly.
# @multilib_dir@ is not really necessary, but sometimes it has
# more uses than just a directory name.
/bin/sh ../../../../libgcc/../mkinstalldirs 32
ln -s -f libgcc.map libgcc.map.def && if [ ! -d 32/shlib ]; then mkdir
32/shlib;
 else true; fi && /home/Peter/gcc-trunk/build-149397-20090607/./gcc/xgcc
-B/home
/Peter/gcc-trunk/build-149397-20090607/./gcc/
-L/home/Peter/gcc-trunk/build-1493
97-20090607/x86_64-w64-mingw32/32/winsup/mingw
-L/home/Peter/gcc-trunk/build-149
397-20090607/x86_64-w64-mingw32/32/winsup/w32api/lib -isystem
/home/Peter/gcc-tr
unk/winsup/mingw/include -isystem /home/Peter/gcc-trunk/winsup/w32api/include
-B
/usr/x86_64-w64-mingw32/bin/ -B/usr/x86_64-w64-mingw32/lib/ -isystem
/usr/x86_64
-w64-mingw32/include -isystem /usr/x86_64-w64-mingw32/sys-include  -m32 -O2
-I..
/../gcc/../winsup/w32api/include -g  -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE
-DNATI
VE_CROSS  -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-pro
totypes -Wold-style-definition  -isystem ./include   -g -DHAVE_GTHR_DEFAULT
-DIN
_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED  -shared -nodefaultlibs libgcc.map.def
-Wl,--o
ut-implib,32/shlib/libgcc_s.a.tmp -o 32/shlib/libgcc_s_sjlj-1.dll.tmp -g -B./
_c
hkstk_s.o _muldi3_s.o _negdi2_s.o _lshrdi3_s.o _ashldi3_s.o _ashrdi3_s.o
_cmpdi2
_s.o _ucmpdi2_s.o _clear_cache_s.o _enable_execute_stack_s.o _trampoline_s.o
__m
ain_s.o _absvsi2_s.o _absvdi2_s.o _addvsi3_s.o _addvdi3_s.o _subvsi3_s.o
_subvdi
3_s.o _mulvsi3_s.o _mulvdi3_s.o _negvsi2_s.o _negvdi2_s.o _ctors_s.o
_ffssi2_s.o
 _ffsdi2_s.o _clz_s.o _clzsi2_s.o _clzdi2_s.o _ctzsi2_s.o _ctzdi2_s.o
_popcount_
tab_s.o _popcountsi2_s.o _popcountdi2_s.o _paritysi2_s.o _paritydi2_s.o
_powisf2
_s.o _powidf2_s.o _powixf2_s.o _powitf2_s.o _mulsc3_s.o _muldc3_s.o _mulxc3_s.o
_multc3_s.o _divsc3_s.o _divdc3_s.o _divxc3_s.o _divtc3_s.o _bswapsi2_s.o
_bswap
di2_s.o _fixunssfsi_s.o _fixunsdfsi_s.o _fixunsxfsi_s.o _fixsfdi_s.o
_fixdfdi_s.
o _fixxfdi_s.o _fixunssfdi_s.o _fixunsdfdi_s.o _fixunsxfdi_s.o _floatdisf_s.o
_f
loatdidf_s.o _floatdixf_s.o _floatundisf_s.o _floatundidf_s.o _floatundixf_s.o
_
divdi3_s.o _moddi3_s.o _udivdi3_s.o _umoddi3_s.o _udiv_w_sdiv_s.o
_udivmoddi4_s.
o addtf3_s.o divtf3_s.o eqtf2_s.o getf2_s.o letf2_s.o multf3_s.o negtf2_s.o
subt
f3_s.o unordtf2_s.o fixtfsi_s.o fixunstfsi_s.o floatsitf_s.o floatunsitf_s.o
fix
tfdi_s.o fixunstfdi_s.o floatditf_s.o floatunditf_s.o extendsftf2_s.o
extenddftf
2_s.o extendxftf2_s.o trunctfsf2_s.o trunctfdf2_s.o trunctfxf2_s.o tf-signs_s.o
unwind-dw2_s.o unwind-dw2-fde_s.o unwind-sjlj_s.o gthr-gnat_s.o unwind-c_s.o
emu
tls_s.o -lmingw32 -lmingwex -lmoldname -lmsvcrt -luser32 -lkernel32 -ladvapi32
-
lshell32 && if [ -f 32/shlib/libgcc_s_sjlj-1.dll ]; then mv -f
32/shlib/libgcc_s
_sjlj-1.dll 32/shlib/libgcc_s_sjlj-1.dll.backup; else true; fi && mv
32/shlib/li
bgcc_s_sjlj-1.dll.tmp 32/shlib/libgcc_s_sjlj-1.dll && mv
32/shlib/libgcc_s.a.tmp
 32/shlib/libgcc_s.a
Creating library file: 32/shlib/libgcc_s.a.tmp
unwind-dw2-fde_s.o: In function `__gthread_mutex_lock':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:758: undefined reference to
`__imp__pthread_mute
x_lock'
unwind-dw2-fde_s.o: In function `__gthread_mutex_unlock':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:790: undefined reference to
`__imp__pthread_mute
x_unlock'
unwind-dw2-fde_s.o: In function `__gthread_mutex_lock':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:758: undefined reference to
`__imp__pthread_mute
x_lock'
unwind-dw2-fde_s.o: In function `__gthread_mutex_unlock':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:790: undefined reference to
`__imp__pthread_mute
x_unlock'
unwind-dw2-fde_s.o: In function `__gthread_mutex_lock':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:758: undefined reference to
`__imp__pthread_mute
x_lock'
unwind-dw2-fde_s.o: In function `__gthread_mutex_unlock':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:790: undefined reference to
`__imp__pthread_mute
x_unlock'
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:790: undefined reference to
`__imp__pthread_mute
x_unlock'
unwind-dw2-fde_s.o: In function `__gthread_mutex_lock':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:758: undefined reference to
`__imp__pthread_mute
x_lock'
unwind-dw2-fde_s.o: In function `__gthread_mutex_unlock':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:790: undefined reference to
`__imp__pthread_mute
x_unlock'
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:790: undefined reference to
`__imp__pthread_mute
x_unlock'
unwind-sjlj_s.o: In function `__gthread_once':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:716: undefined reference to
`__imp__pthread_once
'
unwind-sjlj_s.o: In function `__gthread_key_create':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:724: undefined reference to
`__imp__pthread_key_
create'
unwind-sjlj_s.o: In function `__gthread_setspecific':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:742: undefined reference to
`__imp__pthread_sets
pecific'
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:742: undefined reference to
`__imp__pthread_sets
pecific'
unwind-sjlj_s.o: In function `__gthread_getspecific':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:736: undefined reference to
`__imp__pthread_gets
pecific'
unwind-sjlj_s.o: In function `__gthread_setspecific':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:742: undefined reference to
`__imp__pthread_sets
pecific'
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:742: undefined reference to
`__imp__pthread_sets
pecific'
unwind-sjlj_s.o: In function `__gthread_getspecific':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:736: undefined reference to
`__imp__pthread_gets
pecific'
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:736: undefined reference to
`__imp__pthread_gets
pecific'
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:736: undefined reference to
`__imp__pthread_gets
pecific'
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:736: undefined reference to
`__imp__pthread_gets
pecific'
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:736: undefined reference to
`__imp__pthread_gets
pecific'
emutls_s.o: In function `__gthread_key_create':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:724: undefined reference to
`__imp__pthread_key_
create'
emutls_s.o: In function `__gthread_getspecific':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:736: undefined reference to
`__imp__pthread_gets
pecific'
emutls_s.o: In function `__gthread_once':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:716: undefined reference to
`__imp__pthread_once
'
emutls_s.o: In function `__gthread_mutex_lock':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:758: undefined reference to
`__imp__pthread_mute
x_lock'
emutls_s.o: In function `__gthread_mutex_unlock':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:790: undefined reference to
`__imp__pthread_mute
x_unlock'
emutls_s.o: In function `__gthread_setspecific':
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:742: undefined reference to
`__imp__pthread_sets
pecific'
/home/Peter/gcc-trunk/build-149397-20090607/x86_64-w64-mingw32/32/libgcc/../../.
./../libgcc/../gcc/gthr-posix.h:742: undefined reference to
`__imp__pthread_sets
pecific'
collect2: ld returned 1 exit status
make: *** [libgcc_s.dll] Error 1


-- 
           Summary: libpthread not linked
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: xenofears at gmail dot com
GCC target triplet: x86_64-w64-mingw32


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40708