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## <a name="API_Limitations_of_the_GNU_syste"> </a> API Limitations of the GNU system
----
Sometimes building or running a program will fail due to bugs in the system API implementation (in Glibc and the Hurd). Make sure you check this list and know them before porting, otherwise you'll end up debugging something just to find out its an already known bug.
Taken from the bug lists in debian BTS. If you find more of them (and it is clear in the bug log that it is a bug), please add them to the list below. See:
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<p> [ <a href="http://bugs.debian.org/hurd" target="_top">http://bugs.debian.org/hurd</a> | <a href="http://bugs.debian.org/hurd-dev" target="_top">http://bugs.debian.org/hurd-dev</a> | <a href="http://bugs.debian.org/libc0.3" target="_top">http://bugs.debian.org/libc0.3</a> | <a href="http://bugs.debian.org/libc0.3-dev" target="_top">http://bugs.debian.org/libc0.3-dev</a> ] </p>
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These are the known system API limits that have porting implications.
#190732: hurd: non-priviledged user may crash filesystem
breaks: coreutils
error: mv command crashes fs (Computer bought the farm)
#47998: msgget IPC not implemented
#184344: extern inlines in libpthread are not ansi compliant
breaks: xfree86 (when compiled with pthreads)
error: "gcc -ansi" gets parse error with "inline"
status: patch sent
#177486: POSIX semaphore
breaks: gnome-libs?
error: missing <semaphore.h>
status: patch sent (but looks like it needs more work)
#184565: libc0.3: missing shm* functions (from <sys/shm.h>)
breaks: cdrtools
error: warning: shm* is not implemented and will always fail
#184573: missing res_search in -lresolv
breaks: krb5
status: actualy this should be in PortingIssues (see bug log)
#190581: nice() doesn't work
breaks: coreutils
error: nice() doesn't take effect on some situations
#171022: libc0.3: missing tmpfile64 function
breaks: python2.2
error: linker can't find "tmpfile64". this can be manifested
in code that calls "tmpfile" when `_FILE_OFFSET_BITS == 64'
status: pending upload
#187391: libc0.3-dev: sockaddr_un.sun_path can't be assigned a "const char *" when compiling with g++
breaks: fam, gail
status: maybe this should be in PortingIssues (see _long_ bug log)
#190367: libc0.3-dev: fcntl F_GETLK not implemented (ENOSYS)
breaks: gnome-session (and others) from running
error: misc lock-related errors
-- [[Main/RobertMillan]] - 01 May 2003
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