ACE_TAO
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tao_idl treats `-g path` as a folder
Version
ACE 7.0.11 (with CMake additions)
Host machine and operating system
Win11
Compiler name and version (including patch level)
VS2019 / MSVC
The $ACE_ROOT/ace/config.h file
#include "ace/config-windows.h"
The $ACE_ROOT/include/makeinclude/platform_macros.GNU file
None. Building with CMake / MSBuild.
Contents of $ACE_ROOT/bin/MakeProjectCreator/config/default.features
Unchanged.
AREA/CLASS/EXAMPLE AFFECTED:
Invoking tao_idl
to process IDL files.
The problem effects:
ACE/TAO and my application's IDL files.
Synopsis
When tao_idl.exe
and ace_gperf.exe
are successfully built out-of-source (which is required for multi-target/config support), and tao_idl
is invoked with -g path/to/gperf
, tao_idl
merely reports that GPERF could not be executed
and falls back to dynamic hashing (even if I've ordered it not to fall back using -H perfect_hash
.
Description
C:\Users\Dev\Git\test\Test_Interface>C:/Users/Dev/Git/test/build/opt/ACE_wrappers/TAO/src/Debug/ace_gperf.exe -h
Usage: C:/Users/Dev/Git/test/build/opt/ACE_wrappers/TAO/src/Debug/ace_gperf.exe [-abBcCdDef[num]gGhH<hashname>i<init>IjJk<keys>K<keyname>lL<language>mMnN<function name>oOprs<size>S<switches>tTvVZ<class name>].
(type C:/Users/Dev/Git/test/build/opt/ACE_wrappers/TAO/src/Debug/ace_gperf.exe -h for help)
-a Generate ANSI standard C output code, i.e., function prototypes.
-b Generate code for Linear Search.
-B Generate code for Binary Search.
-c Generate comparison code using strncmp rather than strcmp.
-C Make the contents of generated lookup tables constant, i.e., readonly.
-d Enables the debugging option (produces verbose output to the standard
error).
-D Handle keywords that hash to duplicate values. This is useful
for certain highly redundant keyword sets.
-e Allow user to provide a string containing delimiters used to separate
keywords from their attributes. Default is ",\n"
-E Define constant values using an enum local to the lookup function
rather than with defines
-f Generate the gen-perf.hash function ``fast.'' This decreases GPERF's
running time at the cost of minimizing generated table-size.
The numeric argument represents the number of times to iterate when
resolving a collision. `0' means ``iterate by the number of keywords.''
-F Provided expression will be used to assign default values in keyword
table, i.e., the fill value. Default is "".
-g Make generated routines use ``inline'' to remove function overhead.
-G Generate the static table of keywords as a static global variable,
rather than hiding it inside of the lookup function (which is the
default behavior).
-h Prints this message.
-H Allow user to specify name of generated hash function. Default
is `hash'.
-i Provide an initial value for the associate values array. Default is 0.
-I Generate comparison code using case insensitive string comparison, e.g.,
strncasecmp or strcasecmp.
Setting this value larger helps inflate the size of the final table.
-j Affects the ``jump value,'' i.e., how far to advance the associated
character value upon collisions. Must be an odd number, default is 5.
-J Skips '#include "ace/OS_NS_string.h"' part in the output.
-k Allows selection of the key positions used in the hash function.
The allowable choices range between 1-126, inclusive. The positions
are separated by commas, ranges may be used, and key positions may
occur in any order. Also, the meta-character '*' causes the generated
hash function to consider ALL key positions, and $ indicates the
``final character'' of a key, e.g., $,1,2,4,6-10.
-K Allow use to select name of the keyword component in the keyword
structure.
-l Compare key lengths before trying a string comparison. This helps
cut down on the number of string comparisons made during the lookup.
-L Generates code in the language specified by the option's argument.
Languages handled are currently C++ and C. The default is C.
-m Avoids the warning about identical hash values. This is valid
only if the -D option is enabled.
-M Skips class definition in the output. This is valid only in C++ mode.
-n Do not include the length of the keyword when computing the hash
function.
-N Allow user to specify name of generated lookup function. Default
name is `in_word_set.'
-o Reorders input keys by frequency of occurrence of the key sets.
This should decrease the search time dramatically.
-O Optimize the generated lookup function by assuming that all input
keywords are members of the keyset from the keyfile.
-p Changes the return value of the generated function ``in_word_set''
from its default boolean value (i.e., 0 or 1), to type ``pointer
to wordlist array'' This is most useful when the -t option, allowing
user-defined structs, is used.
-r Utilizes randomness to initialize the associated values table.
-s Affects the size of the generated hash table. The numeric argument
for this option indicates ``how many times larger or smaller'' the
associated value range should be, in relationship to the number of
keys, e.g. a value of 3 means ``allow the maximum associated value
to be about 3 times larger than the number of input keys.''
Conversely, a value of -3 means ``make the maximum associated
value about 3 times smaller than the number of input keys. A
larger table should decrease the time required for an unsuccessful
search, at the expense of extra table space. Default value is 1.
-S Causes the generated C code to use a switch statement scheme, rather
than an array lookup table. This can lead to a reduction in both
time and space requirements for some keyfiles. The argument to
this option determines how many switch statements are generated.
A value of 1 generates 1 switch containing all the elements, a value
of 2 generates 2 tables with 1/2 the elements in each table, etc.
This is useful since many C compilers cannot correctly generate code
for large switch statements.
-t Allows the user to include a structured type declaration for
generated code. Any text before %% is consider part of the type
declaration. Key words and additional fields may follow this, one
group of fields per line.
-T Prevents the transfer of the type declaration to the output file.
Use this option if the type is already defined elsewhere.
-v Prints out the current version number and exits with a value of 0
-V Exits silently with a value of 0.
-Z Allow user to specify name of generated C++ class. Default
name is `Perfect_Hash.'
However TAO_IDL prints no information on why it thinks GPERF could not be executed
, and its documentation does not mention any diagnostic options.
C:\Users\Dev\Git\test\Test_Interface>"C:\Program Files\CMake\bin\cmake.exe" -E env TAO_ROOT=C:/Users/Dev/Git/test/opt/ACE_wrappers/TAO "PATH=C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30133\bin\Hostx64\x64;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files\Git\cmd;C:\Program Files\CMake\bin;C:\Program Files\dotnet\;C:\Perl64\bin;C:\Perl\bin;C:\Users\Dev\AppData\Local\Microsoft\WindowsApps;C:\Users\Dev\AppData\Local\Programs\Microsoft VS Code\bin;C:\Users\Dev\.dotnet\tools" C:/Users/Dev/Git/test/build/opt/ACE_wrappers/TAO/TAO_IDL/Debug/tao_idl.exe -g C:\Users\Dev\Git\test\build\opt\ACE_wrappers\TAO\src\Debug\ace_gperf.exe -Sp -Sd -Sg -Wb,pre_include=ace/pre.h -Wb,post_include=ace/post.h --idl-version 4 -as --unknown-annotations ignore -IC:/Users/Dev/Git/test/opt/ACE_wrappers/TAO -IC:/Users/Dev/Git/test/Test_Interface C:/Users/Dev/Git/test/Test_Interface/vp_core.idl -H perfect_hash
TAO_IDL: warning, GPERF could not be executed
Perfect Hashing or Binary/Linear Search cannot be done without GPERF
Now, using Dynamic Hashing..
To use Perfect Hashing or Binary/Linear Search strategy
-Build gperf at $ACE_ROOT/apps/gperf/src
-Set the environment variable $ACE_ROOT appropriately or add $ACE_ROOT/bin to the PATH
-Refer to Operation Lookup section in the TAO IDL User Guide ($TAO_ROOT/docs/compiler.html) for more details
tao-idli_zBLwo5.cpp