Update for QNX from Kardos, Dr. Andrea
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Bruce Momjian
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PostgresSQL on QNX 4
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--------------------
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PosgresSQL 6.5.2 could be ported to QNX 4.25.
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This port is an important step because PostgreSQL is now the only free
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relational database with full SQL and ODBC support available for QNX 4.
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The only commercial databases available are Empress RDBMS and Velocis
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Database Server (not supported for Digital Unix).
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The most expensive topics where the emulation of System V semaphore sets,
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shared memory and IPC and of some IEEE floating-point functionality. For
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the Watcom compiler spinlocks have been implemented using POSIX semaphores.
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A lot of make files had to be changed because $(LD) doesn't support the
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-r option on QNX 4.
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It is recomended to use the GNU C compiler instead of the Watcom compiler
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because the Watcom compiler doesn't support a int8 datatype (long or
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long long int) and it does not have a C++ frontend.
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It could be managed to build postgres using the Watcom compiler but it crashes
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quite early. These problems probably could be solved. The only advantage would
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be support of Tk and pgaccess. For the Watcom compiler some more modifications
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have to be made which are not described here.
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QNX 4 does not offer native support of shared libraries. Therefore the related
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functionality cannot be used. Shared library support could probably be
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implemented.
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QNX 4 does not support UNIX domain sockets. Connections can only be made
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with TCP/IP sockets. Therefore postmaster must always be started with the
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-i option. Furthermore it would be useful to set the PGHOST variable.
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Prerequisites:
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--------------
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The following prerequisites have been used:
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QNX 4.25
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GNU make
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flex-2.5.4a.tar.gz (flex)
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egcs111-qnx4-r20.tar[.gz] (GNU C)
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perl 5.004_04
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tcl8.0.3.tar.Z (Tcl)
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flex can be built without any problems using the Watcom or GNU C compilers.
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GNU C can be installed by
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/etc/install -u egcs111-qnx4-r20.tar[.gz]
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Although Tcl can be built after some slight code changes using the Watcom
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compiler, the GNU C compiler should be used instead. Otherwise it would be
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impossible to link postgres built with GNU C together with libtcl8.0.a built
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with the Watcom compiler.
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To make unix/tclUnixTest.c compilable uncomment
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#include <sys/resource.h>
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in it or
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touch /usr/include/sys/resource.h
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In unix/Makefile.in replace
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( echo cd $(TOP_DIR)/tests\; source all ) | ./tcltest
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by
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( echo cd ../tests\; source all ) | ./tcltest
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After that Tcl can be built and tested as stated in README.
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Tk cannot be built with GNU C due to the lack of a stack version of the
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X11 library. With the Watcom compiler Tk could be built but this is not useful
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because of the link problems mentioned above.
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Therefore the Tk interface and the pgaccess tool cannot be supported for a GNU C
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version of PostgreSQL on QNX 4.
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PostgreSQL:
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-----------
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On QNX 4 some headers are not in the directories expected. To avoid
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modifications of the code the following links should be made:
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ln -s /usr/local/bin/perl /usr/local/bin/perl5
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ln -s /usr/include/errno.h /usr/include/sys/errno.h
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ln -s /usr/include/ioctl.h /usr/include/sys/ioctl.h
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The sources can be unpacked by
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cd /usr/src
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gunzip -c postgresql-6.5.2.tar.gz | tar xvf -
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mv postgresql-6.5.2 pgsql
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gunzip -c postgresql-6.5.2-qnx4-gcc-patch.tar.gz | tar xvf -
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Furthermore the header files ipc.h, sem.h and shm.h must be installed.
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They are not available on QNX 4. stl_alloc.h must be modified
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(extern "C++" { ... }).
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su
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cd /usr
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gunzip -c qnx4-gcc-header-patch.tar.gz | tar xvf -
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exit
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Possibly the file
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/usr/local/lib/gcc-lib/i386-pc-qnx4/egcs-2.91.60/include/g++/stl_alloc.h
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must be copied to the right path in your environment.
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If this ist the case the path has to be adopted in src/Makefile.custom too
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(CXXFLAGS).
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If all prerequisites are available postgres can be built and installed by
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cd pgsql/src
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./configure --with-tcl --with-perl --with-x
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gmake all > make.log 2>&1
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gmake install > make.install.log 2>&1
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su
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cd interfaces/perl5
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gmake install
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exit
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All other steps can be carried out as stated in the INSTALL file.
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Regression tests:
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-----------------
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The majority of regression tests succeeded. The following tests failed:
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int2, int4:
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Error message "Result too large" instead of "Numerical result out of range".
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Can be ignored.
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int8, float4:
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Exponent expression "e+nnn" instead of "e+nn". Can be ignored.
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float8:
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Exponent expression "e+nnn" instead of "e+nn" and some slight deviation
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in the last digit.
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Can be ignored.
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geometry:
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Some slight deviation in the last digit and "0" instead of "-0".
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Can be ignored.
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datetime, abstime, tinterval, horology:
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Differences for years outside the normal Unix range, e.g. 1968
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instead of 2105
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Can be ignored.
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create_function_2, triggers, misc, plpgsql:
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Error messages due to the lack of shared library support.
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rules:
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Subject of further investigation.
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numeric, numeric_big:
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ERROR: Cannot create unique index. Table contains non-unique values
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Subject of further investigation.
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The reached state of this port should be sufficient for lot of applications.
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Have fun!
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Andreas Kardos
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kardos@repas-aeg.de
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1999-12-09
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@ -7,7 +7,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/arrayfuncs.c,v 1.49 1999/11/22 17:56:29 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/arrayfuncs.c,v 1.50 1999/12/09 15:56:16 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -1832,7 +1832,9 @@ _LOtransfer(char **destfd,
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int isDestLO)
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{
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#define MAX_READ (512 * 1024)
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#if !defined(min)
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#define min(a, b) (a < b ? a : b)
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#endif
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struct varlena *v = NULL;
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int tmp,
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inc,
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@ -6,7 +6,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/Attic/chunk.c,v 1.23 1999/07/17 20:17:54 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/Attic/chunk.c,v 1.24 1999/12/09 15:56:16 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -28,8 +28,12 @@
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#define MANY 10000
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#define MAXPAT 20
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#define quot_ceil(x,y) (((x)+(y)-1)/(y))
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#if !defined(min)
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#define min(x,y) (((x) < (y))? (x) : (y))
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#endif
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#if !defined(max)
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#define max(x,y) (((x) > (y))? (x) : (y))
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#endif
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static CHUNK_INFO cInfo;
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