2009-03-09 08:28:20 A problem when compiling multi-threads programs in uclinux

xiaofeng xu (CHINA)

Message: 70605

I have a problem when compiling multi-threads programs. This is the error information when I compiled the "threaddemos" which is in "/home/eflag-bfin/uClinux-dist/user/threaddemos" (I have not made any changes.) :

make[2]: Entering directory `/home/eflag-bfin/uClinux-dist/user/threaddemos'

bfin-elf-gcc -nostartfiles -Wl,-elf2flt /home/eflag-bfin/uClinux-dist/lib/uClibc/lib/crt0.o -o thdm thdm.o -lpthread -L/home/eflag-bfin/uClinux-dist/lib/uClibc/. -L/home/eflag-bfin/uClinux-dist/lib/uClibc/lib -L/home/eflag-bfin/uClinux-dist/lib/uClibc/libm -L/home/eflag-bfin/uClinux-dist/lib/libnet -L/home/eflag-bfin/uClinux-dist/lib/libdes -L/home/eflag-bfin/uClinux-dist/lib/libaes -L/home/eflag-bfin/uClinux-dist/lib/libpcap -L/home/eflag-bfin/uClinux-dist/lib/zlib -L/home/eflag-bfin/uClinux-dist/lib/libssl -L/home/eflag-bfin/uClinux-dist/lib/uClibc/libc -L/home/eflag-bfin/uClinux-dist/lib/uClibc/libcrypt

/home/eflag-bfin/install/bfin-elf/lib/gcc/bfin-elf/3.4.4/../../../../bfin-elf/bin/ld.real: cannot find -lpthread

collect2: ld returned 1 exit status

make[2]: *** [thdm] Error 1

make[2]: Leaving directory `/home/eflag-bfin/uClinux-dist/user/threaddemos'

make[1]: *** [all] Error 2

make[1]: Leaving directory `/home/eflag-bfin/uClinux-dist/user'

make: *** [subdirs] Error 1

I think there may be something wrong with the "multi-thread" library. I notice that when I use "make" to install the uClibc, nothing is done to build the libthread.a, the detailed information is as follows:

make -C libm

make[3]: Entering directory `/home/eflag-bfin/uClinux-dist/uClibc/libm' (install libm.a)

bfin-elf-ar r libm.a e_acos.o e_acosh.o e_asin.o e_atan2.o e_atanh.o e_cosh.o e_exp.o e_fmod.o e_gamma.o e_gamma_r.o e_hypot.o e_j0.o e_j1.o e_jn.o e_lgamma.o e_lgamma_r.o e_log.o e_log10.o e_pow.o e_remainder.o e_rem_pio2.o e_scalb.o e_sinh.o e_sqrt.o k_cos.o k_rem_pio2.o k_sin.o k_standard.o k_tan.o s_asinh.o s_atan.o s_cbrt.o s_ceil.o s_copysign.o s_cos.o s_erf.o s_expm1.o s_fabs.o s_finite.o s_floor.o s_frexp.o s_ilogb.o s_ldexp.o s_lib_version.o s_log1p.o s_logb.o s_matherr.o s_modf.o s_nextafter.o s_rint.o s_scalbn.o s_signgam.o s_significand.o s_sin.o s_tan.o s_tanh.o w_acos.o w_acosh.o w_asin.o w_atan2.o w_atanh.o w_cabs.o w_cosh.o w_drem.o w_exp.o w_fmod.o w_gamma.o w_gamma_r.o w_hypot.o w_j0.o w_j1.o w_jn.o w_lgamma.o w_lgamma_r.o w_log.o w_log10.o w_pow.o w_remainder.o w_scalb.o w_sinh.o w_sqrt.o w_sqrtf.o fpmacros.o nan.o s_ceilf.o s_floorf.o

+ install -d ../lib

+ rm -f ../lib/libm.a

+ install -m 644 libm.a ../lib

make[3]: Leaving directory `/home/eflag-bfin/uClinux-dist/uClibc/libm'

make -C libpthread

make[3]: Entering directory `/home/eflag-bfin/uClinux-dist/uClibc/libpthread' (install nothing)

make[3]: Leaving directory `/home/eflag-bfin/uClinux-dist/uClibc/libpthread'

Not building shared libraries...

Finally finished compiling...

How to build the "multi-thread" library? Is there anything needs to be revised in the default "makefile" file ?

Thank you very much.

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2009-03-09 08:47:33 Re: A problem when compiling multi-threads programs in uclinux

Phil Wilshire (UNITED STATES)

Message: 70609

Using the 2008R1 release I get the following

after this

make user/threaddemos_clean

then this

make user/threaddemos_only

make[1]: Entering directory `/home/student-10/work/uClinux-dist/user'

touch threaddemos/.sgbuilt_user && make -j1 -C threaddemos

make[2]: Entering directory `/home/student-10/work/uClinux-dist/user/threaddemos'

bfin-linux-uclibc-gcc -pipe -Wall -O0 -g -mcpu=bf537-0.2 -DEMBED -D__uClinux__ -I/home/student-10/work/uClinux-dist -mcpu=bf537-0.2 -c -o thdm.o thdm.c

bfin-linux-uclibc-gcc -mcpu=bf537-0.2 -o thdm thdm.o -lpthread

bfin-linux-uclibc-gcc -pipe -Wall -O0 -g -mcpu=bf537-0.2 -DEMBED -D__uClinux__ -I/home/student-10/work/uClinux-dist -mcpu=bf537-0.2 -c -o mtdm.o mtdm.c

bfin-linux-uclibc-gcc -mcpu=bf537-0.2 -o mtdm mtdm.o -lpthread

bfin-linux-uclibc-gcc -pipe -Wall -O0 -g -mcpu=bf537-0.2 -DEMBED -D__uClinux__ -I/home/student-10/work/uClinux-dist -mcpu=bf537-0.2 -c -o bcdm.o bcdm.c

bfin-linux-uclibc-gcc -mcpu=bf537-0.2 -o bcdm bcdm.o -lpthread

make[2]: Leaving directory `/home/student-10/work/uClinux-dist/user/threaddemos'

make[1]: Leaving directory `/home/student-10/work/uClinux-dist/user'

You seem to be using an older version of the system

/home/eflag-bfin/install/bfin-elf/lib/gcc/bfin-elf/3.4.4/../../../../bfin-elf/bin/ld.real: cannot find -lpthread

And possibly the wrong compiler "bfin-elf-gcc"

Try a later system

Phil Wilshire

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2009-03-09 16:43:28 Re: A problem when compiling multi-threads programs in uclinux

Mike Frysinger (UNITED STATES)

Message: 70625