Application Rebuilding
In addition to migrating data, you must rebuild all applications that connect locally to an existing Ingres installation.
The following compilers have been tested and are known to work with Ingres for OpenVMS.
VSI BASIC
VSI C
VSI COBOL
VSI C++
VSI Pascal
VSI Fortran
For the latest information, see the Readme.
Modifications Required For C Applications
To build C applications byte-aligned with Ingres, a number of files require modification. Any modifications made may need to be re-applied following the installation of an Ingres patch.
The first files to modify are the C header files supplied in the following directories:
II_SYSTEM:[INGRES.DEMO.API.ASC]
II_SYSTEM:[INGRES.DEMO.UDADTS]
II_SYSTEM:[INGRES.FILES]
At this time, the only header files that contain Ingres structure definitions need modification, these are:
II_SYSTEM:[INGRES.DEMO.API.ASC]ASC.H
II_SYSTEM:[INGRES.DEMO.UDADTS]UDT.H
II_SYSTEM:[INGRES.FILES]ABFURTS.H,
II_SYSTEM:[INGRES.FILES]EQSQLCA.H,
II_SYSTEM:[INGRES.FILES]EQSQLDA.H,
II_SYSTEM:[INGRES.FILES]FRAME2.H,
II_SYSTEM:[INGRES.FILES]FRAME60.H,
II_SYSTEM:[INGRES.FILES]FRAME61.H,
II_SYSTEM:[INGRES.FILES]IIADD.H,
II_SYSTEM:[INGRES.FILES]IIAPI.H,
II_SYSTEM:[INGRES.FILES]OSLHDR.H,
II_SYSTEM:[INGRES.FILES]RAAT.H,
II_SYSTEM:[INGRES.FILES]SPATIAL.H
On the first line in each of the above files add:
#pragma member_alignment save
#pragma member_alignment
On the last line in each of the above files add:
#pragma member_alignment restore
Note: The "#" of the #pragma instruction must be the first character on the line.
The purpose of these pragmas is to direct the compiler to naturally align the elements of the defined structures, then to restore the alignment strategy used before the header file was included.
One further change is required to allow Application-By-Forms and Vision applications to successfully build with unaligned code. In II_SYSTEM:[INGRES.FILES]DCC.COM, replace the line
$ cc/standard=vaxc/float=ieee_float/nooptimize/nolist
with:
$ cc/NOMEMBER_ALIGNMENT/GRANULARITY=BYTE -
/standard=vaxc/float=ieee_float/nooptimize/nolist
Modifications Required For COBOL Applications
To achieve the same result for embedded COBOL applications, the following statements must be added to these files:
II_SYSTEM:[INGRES.FILES]EQSQLCA.COB, II_SYSTEM:[INGRES.FILES]ESQLDA.COB
On the first line of the above files, add:
*DC SET ALIGNMENT
On the last line of the above files, add:
*DC END-SET ALIGNMENT
The II_SYSTEM:[INGRES.FILES]UTCOM.DEF file requires the removal of the qualifier "/alignment=padding" from the COBOL compile statements.
Last modified date: 11/28/2023