3

---

Working With 32 and 64-bit Applications

---

The Dracula directory structure is as follows:

• The wrappers are stored in:
  

  tools/dracula/bin

• 64-bit executables(if exist) are stored in:
  

  tools/dracula/bin/64bit

• 32-bit executables with or without 64-bit equivalent are stored in:
  

  tool/dracula/bin/32bit

By default  Dracula uses 32-bit application binaries.

To enable 64-bit applications use the following UNIX environment variable

CDS_AUTO_64BIT {ALL | NONE | "INCLUDE:list" | "EXCLUDE:list"| "list"}

This environment variable enables you to select 32-bit or 64-bit executables using the following values:

• ALL Invokes all applications as 64-bit, where available. The list of executables available is in your install_dir/bin/64bit
• NONE Invokes all applications as 32-bit.
• "INCLUDE:list" Invokes all applications in the list as 64-bit, where available.
• "EXCLUDE:list" Invokes all applications as 64-bit, where possible, except the applications in the list.
• "list" Invokes only the executables included in the list, if available, as 64-bit. "list" is a list of case-sensitive executable names delimited by a semi-colon(;) or a colon(:). Providing the list without a preceding keyword works the same as using the keyword INCLUDE.

Examples:

setenv CDS_AUTO_64BIT "pipo;layout.exe"

setenv CDS_AUTO_64BIT "EXCLUDE:si"

All 64-bit executables are controlled by a wrapper executable. The wrapper invokes the 32-bit or 64-bit executables depending on how the CDS_AUTO_64BIT environment variable is set, or whether the 64-bit executable is installed. The wrapper also adjusts the paths before invoking the 32-bit or 64-bit executables.

If you do not set the CDS_AUTO_64BIT environment variable then the 32-bit executable is invoked by default.

However, Dracula uses a separate environment variable called DRACULA_AUTO_64BIT to enable 64-bit mode. This environment variable specifies the addressing mode only for Dracula, and overrides the ALL or NONE settings of the CDS_AUTO_64BIT environment variable for Dracula. DRACULA_AUTO_64BIT recognizes the following variable values:

• ALL Invokes all applications as 64-bit, where available. The list of executables available is in your install_dir/bin/64bit
• NONE Invokes all applications as 32-bit.
• "INCLUDE:list" Invokes all applications in the list as 64-bit, where available.
• "EXCLUDE:list" Invokes all applications as 64-bit, where possible, except the applications in the list.
• "list" Invokes only the executables included in the list, if available, as 64-bit. "list" is a list of case-sensitive executable names delimited by a semi-colon(;) or a colon(:). Providing the list without a preceding keyword works the same as using the keyword INCLUDE.

Example:

setenv DRACULA_AUTO_64BIT "PDRACULA;LOGLVS"

setenv DRACULA_AUTO_64BIT "EXCLUDE:LPEPRO"

• • Users must not include directories containing the associated "real," non-wrapper executables in their UNIX path
  • There is a consistent use model in both 32 bit and "automatic high capacity" modes (for example, the same UNIX path)
  • Prevents pilot errors (for example, attempting to run a 64-bit executable in a 32-bit environment)
  • Consistent with Solaris 7 32 or 64-bit model
  • Requires the same licenses for a 32-bit or 64-bit operation