For debugging purpose I need own build cygwin.dll.
I use snapshot cygwin-src-20100707.tar.bz2
When I go through build process ( as noticed at page
http://cygwin.com/faq/faq-nochunks.html#faq.programming.building-cygwin )
some questions arises.
1) I run command 'make check' and following error appear:
running gcc -L/oss/build/i686-pc-cygwin/winsup
-L/oss/build/i686-pc-cygwin/winsup/testsuite
-L/oss/build/i686-pc-cygwin/winsup/w32api/lib -isystem
/usr/src/cygwin-1.7.5-1/winsup/include -isystem
/usr/src/cygwin-1.7.5-1/winsup/testsuite/include -isystem
/usr/src/cygwin-1.7.5-1/winsup/w32api/include
-B/oss/build/i686-pc-cygwin/newlib/ -isystem
/oss/build/i686-pc-cygwin/newlib/targ-include -isystem
/usr/src/cygwin-1.7.5-1/newlib/libc/include
-I/usr/lib/gcc/i686-pc-cygwin/4.3.4/include -nodefaultlibs -mwin32 -g
-DDEBUGGING -MD -I/usr/src/cygwin-1.7.5-1/winsup/testsuite/libltp/include -Wall
-Wstrict-aliasing -Wwrite-strings -fno-common -pipe -fbuiltin
-fmessage-length=0 -I. -I/usr/src/cygwin-1.7.5-1/winsup/cygwin/include
-I/usr/src/cygwin-1.7.5-1/winsup/cygwin
-I/usr/src/cygwin-1.7.5-1/winsup/w32api/include
/usr/src/cygwin-1.7.5-1/winsup/testsuite/winsup.api/ltp/chown01.c
-I/usr/src/cygwin-1.7.5-1/winsup/testsuite/libltp/include
/oss/build/i686-pc-cygwin/winsup/testsuite/libltp.a
/oss/build/i686-pc-cygwin/winsup/testsuite/../cygwin/binmode.o -lgcc
/oss/build/i686-pc-cygwin/winsup/testsuite/../cygwin/libcygwin0.a -lkernel32
-luser32 -o ltp-chown01.exe
/usr/lib/gcc/i686-pc-cygwin/4.3.4/crtbegin.o:cygming-crtbegin.c:(.data+0x0):
undefined reference to `___register_frame_info'
/usr/lib/gcc/i686-pc-cygwin/4.3.4/crtbegin.o:cygming-crtbegin.c:(.data+0x4):
undefined reference to `___deregister_frame_info'
FAIL: ltp/chown01.c (compile)
How to determine where libriaries with symbols ___deregister_frame_info are
placed?
2) When I run command ./configure I palce enviroment variable
CFLAGS=-DDEBUGGING. This is enough for switch on debug code ?
There is mention about option --enable-debuggin in file
how-to-debug-cygwin.txt, but when I try use it debug code do not insert in
binary file.
3) Where I can find debug messages?
From source code i see that messages go to syslog. So I install and
configure syslog-ng.
But nothing appear in /var/log/messages.
What I may try to do?
4) Do I need a file /dev/kmsg for debugging output?
There is no kmsg file in my /dev/ directory.
Any help would be appreciated.
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