export PATH_TO_BUILDROOT=/home/henry/src/buildroot
export CC=$PATH_TO_BUILDROOT/build_i586/staging_dir/usr/bin/i586-linux-gcc
export LD=$PATH_TO_BUILDROOT/build_i586/staging_dir/usr/bin/i586-linux-ld
export CPPFLAGS=-I$PATH_TO_BUILDROOT/build_i586/staging_dir/usr/include
export LDFLAGS=-L$PATH_TO_BUILDROOT/build_i586/staging_dir/usr/lib
export PATH=$PATH:$PATH_TO_BUILDROOT/build_i586/staging_dir/usr/bin
$CC -v -g pthread_test.c -o pthread_test -lpthread
Using built-in specs.
Target: i586-linux-uclibc
Configured with: /home/henry/src/buildroot/toolchain_build_i586/gcc-4.2.1/configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=i586-linux-uclibc --enable-languages=c --with-sysroot=/home/henry/src/buildroot/build_i586/staging_dir --with-build-time-tools=/home/henry/src/buildroot/build_i586/staging_dir/usr/i586-linux-uclibc/bin --disable-__cxa_atexit --enable-target-optspace --with-gnu-ld --enable-shared --with-gmp=/home/henry/src/buildroot/toolchain_build_i586/gmp --with-mpfr=/home/henry/src/buildroot/toolchain_build_i586/mpfr --disable-nls --enable-threads --disable-multilib --with-arch=i586 --with-tune=i586
Thread model: posix
gcc version 4.2.1
/home/henry/src/buildroot/build_i586/staging_dir/usr/bin/../libexec/gcc/i586-linux-uclibc/4.2.1/cc1 -quiet -v -iprefix /home/henry/src/buildroot/build_i586/staging_dir/usr/bin/../lib/gcc/i586-linux-uclibc/4.2.1/ pthread_test.c -quiet -dumpbase pthread_test.c -mtune=i586 -march=i586 -auxbase pthread_test -g -version -o /tmp/ccwFTh8e.s
ignoring nonexistent directory "/home/henry/src/buildroot/build_i586/staging_dir/usr/bin/../lib/gcc/i586-linux-uclibc/4.2.1/../../../../i586-linux-uclibc/include"
ignoring nonexistent directory "/home/henry/src/buildroot/build_i586/staging_dir/usr/local/include"
ignoring nonexistent directory "/usr/lib/gcc/i586-linux-uclibc/4.2.1/include"
ignoring nonexistent directory "/usr/lib/gcc/../../i586-linux-uclibc/include"
#include "..." search starts here:
#include <...> search starts here:
/home/henry/src/buildroot/build_i586/staging_dir/usr/bin/../lib/gcc/i586-linux-uclibc/4.2.1/include
/home/henry/src/buildroot/build_i586/staging_dir/usr/include
End of search list.
GNU C version 4.2.1 (i586-linux-uclibc)
compiled by GNU C version 4.1.2 20070925 (Red Hat 4.1.2-33).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 0b1243d340343a65a3d063f8a78be63e
/home/henry/src/buildroot/build_i586/staging_dir/usr/bin/../lib/gcc/i586-linux-uclibc/4.2.1/../../../../i586-linux-uclibc/bin/as -V -Qy -o /tmp/ccY3B3Jo.o /tmp/ccwFTh8e.s
GNU assembler version 2.18 (i586-linux-uclibc) using BFD version (GNU Binutils) 2.18
/home/henry/src/buildroot/build_i586/staging_dir/usr/bin/../libexec/gcc/i586-linux-uclibc/4.2.1/collect2 --sysroot=/home/henry/src/buildroot/build_i586/staging_dir --eh-frame-hdr -m elf_i386 -dynamic-linker /lib/ld-uClibc.so.0 -o pthread_test /home/henry/src/buildroot/build_i586/staging_dir/usr/lib/crt1.o /home/henry/src/buildroot/build_i586/staging_dir/usr/lib/crti.o /home/henry/src/buildroot/build_i586/staging_dir/usr/bin/../lib/gcc/i586-linux-uclibc/4.2.1/crtbegin.o -L/home/henry/src/buildroot/build_i586/staging_dir/usr/bin/../lib/gcc/i586-linux-uclibc/4.2.1 -L/home/henry/src/buildroot/build_i586/staging_dir/usr/bin/../lib/gcc -L/home/henry/src/buildroot/build_i586/staging_dir/usr/bin/../lib/gcc/i586-linux-uclibc/4.2.1/../../../../i586-linux-uclibc/lib -L/home/henry/src/buildroot/build_i586/staging_dir/lib -L/home/henry/src/buildroot/build_i586/staging_dir/usr/lib /tmp/ccY3B3Jo.o -lpthread -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /home/henry/src/buildroot/build_i586/staging_dir/usr/bin/../lib/gcc/i586-linux-uclibc/4.2.1/crtend.o /home/henry/src/buildroot/build_i586/staging_dir/usr/lib/crtn.o
GDB session on the target:
gdb /usr/bin/pthread_test
GNU gdb 6.6
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i586-linux-uclibc"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) run
Starting program: /usr/bin/pthread_test
[Thread debugging using libthread_db enabled]
[New Thread 1024 (LWP 796)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1024 (LWP 796)]
0xb7ed14ea in memcpy () from /lib/libc.so.0
(gdb) bt
0 0xb7ed14ea in memcpy () from /lib/libc.so.0
0000001 0xb7edd28c in __libc_pthread_init () from /lib/libc.so.0
2 0xb7eed75c in __pthread_initialize_minimal () from /lib/libpthread.so.0
0000003 0xb7edd381 in __uClibc_init () from /lib/libc.so.0
0000004 0xb7f01393 in _dl_get_ready_to_run () from /lib/ld-uClibc.so.0
0000005 0xb7f016a0 in ?? () from /lib/ld-uClibc.so.0
0000006 0xbfa93490 in ?? ()
0000007 0xb7efe000 in ?? ()
0000008 0xbfa93574 in ?? ()
0000009 0xbfa9360c in ?? ()
0000010 0xbfa93604 in ?? ()
0000011 0xbfa93574 in ?? ()
0000012 0xb7efe000 in ?? ()
0000013 0x00000002 in ?? ()
0000014 0x00000000 in ?? ()
(gdb) q
Also tested this with hello.c:
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[]) {
printf("Hello World!\n");
}
This segfaults (same as pthread_test) if -lpthread is used, but works fine without.
pthread_test.c [^] (877 bytes) 04-04-08 12:08 
