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This package was approved by moderator flcdrg on 12/4/2016.

jom is a clone of nmake to support the execution of multiple independent commands in parallel.
It basically adds the -j command line switch similar to GNU make.

To install jom, run the following command from the command line or from PowerShell:

C:\> choco install jom

To upgrade jom, run the following command from the command line or from PowerShell:

C:\> choco upgrade jom


  • tools\chocolateyinstall.ps1 Show
    $ErrorActionPreference = 'Stop'
    Install-ChocolateyZipPackage `
        -PackageName 'jom' `
        -Url '' `
        -UnzipLocation "$(Split-Path -parent $MyInvocation.MyCommand.Definition)" `
        -Checksum '830CD94ED6518FBE4604A0F5A3322671B4674B87D25A71349C745500D38E85C0FAC4F6995242FC5521EB048E3966BB5EC2A96A06B041343ED8DA9BBA78124F34' `
        -ChecksumType 'sha512'

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This package has no dependencies.

Package Maintainer(s)

Software Author(s)

  • Qt Project


© 2016 The Qt Company Ltd.


Release Notes

This is the changelog for jom 1.1.2, the parallel make tool.

Changes since jom 1.1.1
- Fixed exit code propagation in xgejom.bat and ibjom.bat (QTCREATORBUG-16619).
- Updated the CMake build system to use Qt5.
- Fixed bogus path in error message for failed targets.
- Fixed error "JobClient destroyed while still acquiring." that could be yielded
for failed builds.
- Fixed /k option (QTCREATORBUG-17131).
- Fixed sub-jom detection for chocolatey shims (QTCREATORBUG-15494).

Changes since jom 1.1.0
- Added the special .NOTPARALLEL target that disables parallel build for the
containing makefile.
- Fixed glitches in !include directives. Includes like <""> were not
possible. Includes like "" did not recursively search through parent
makefiles directories.
- Introduced the JOMFLAGS environment variable. This is a MAKEFLAGS pendant.
JOMFLAGS is useful to set up separate flags for nmake and jom.
- Renamed ibjom.cmd to ibjom.bat for consistency.
- Added xgejom.bat, a wrapper for the IncrediBuild XGE interface.
- Fixed wildcard handling for subdirectories (QTCREATORBUG-16499).
- Implemented the "build all targets" option (QTCREATORBUG-16500).

Changes since jom 1.0.16
- Restrict the number of parallel jobs in recursively called instances
similar to GNU make's jobserver (QTCREATORBUG-10846).

Changes since jom 1.0.15
- Fix occasional hang on exit (QTCREATORBUG-14600).

Changes since jom 1.0.14
- Fix potential hang on error in a sub-jom.
- Yield error on missing !endif directives (QTCREATORBUG-14211).
- Fix ignoring exit codes greater than 255.
- Fix $? filename macro for nonexistent targets (QTCREATORBUG-14125).
- Fix quoting of dependencies with spaces (QTCREATORBUG-12296).

Changes since jom 1.0.13
- Fix exit code forwarding. (QTCREATORBUG-11556)
- Fix file name macro modifers for $** and $?. (QTCREATORBUG-6932)
- Fix equal signs in semicolon command syntax. (QTCREATORBUG-7942)
- Fix error line numbers for inline files. (QTCREATORBUG-8451)
- Ignore macro assignments in inline files. (QTCREATORBUG-8452)
- Yield error on unexpected !ENDIF directive.
- Support wildcards in dependency lines. (QTCREATORBUG-10439)
- Use IcrediBuild's BuildConsole instead of the XGE interface in ibjom.

Changes since jom 1.0.12
- Fix spurious "Can't start command" error.
- Fix passing of -j argument to subjoms.
- Sanity check the -j argument.
- Fix regression of non-functional set command in command blocks.
- Fix handling of environment variables that would cause a syntax errors in
- Fix handling of environment variables with lowercase names.

Changes since jom 1.0.11
- Performance improvements.
- Fixed whitespace in command line arguments. (QTCREATORBUG-7428)
- Enhanced responsiveness of subjom output.
- Separate output of stdout and stderr.
- Fix the output of silent commands in /n mode. (QTCREATORBUG-7170)
- Implemented the /U switch for dumping inline files.
- Fix expansion of environment variables.

Changes since jom 1.0.10
- Fix exit code for /k command line switch. (QTCREATORBUG-6987)
- Fix spurious 0x0d characters in process output. (QTCREATORBUG-6986)
- Fix process output ordering and printing of large amounts of output
in recursive jom scenarios.
- Improved performance by caching file time stamps.

Changes since jom 1.0.9
- Fix regression that caused jom to fail on Windows XP.

Changes since jom 1.0.8
- The GNU Make option -w is now supported to print the current working
directory before and after other processing.
- Fix crash when specifying a target for an empty makefile.
- Fix lookup for targets in the Makefile's directory. (QTCREATORBUG-6546)
- Fix handling of environment variables. (QTCREATORBUG-6578)
- Specifying an exit code with the '-' command modifier was fixed.
- Fix command modifiers in inference rules. (QTCREATORBUG-6742)
- Fix parsing of the "ignore exit code" command modifier.
- Fix (very rare) deadlock and zombie processes.
- The preprocessor directive !include <file> now looks up files in the
include directories correctly. (QTCREATORBUG-6869)

Changes since jom 1.0.7
- Fix spawning of child processes that expect a valid stdin handle.
E.g. xcopy couldn't be called anymore.
- CMakeList.txt was fixed (thanks to Ryan Pavlik).

Changes since jom 1.0.6
- Fix blank lines in output. (QTCREATORBUG-3974)
- Small performance improvement due to compilation with
- Ctrl-C handling has been revisited. Much simpler and more correct.
Before the compiler jobs didn't get a Ctrl-C but were terminated.
- Special .SYNC dependents implemented. See README for a small description.
- Handle quoted dollar signs in inline files correctly. (QTCREATORBUG-2875)
- Respect the MAKEFLAGS environment variable. (QTCREATORBUG-5028)
- Complete detection of cmd builtins. This fixes annoying warnings when building
with IncrediBuild.

Changes since jom 1.0.5
- Fix mean monster spawn issue.

Changes since jom 1.0.4
- Fix out of date check for pseudotargets. (QTCREATORBUG-3909)

Changes since jom 1.0.3
- Fix that -j1 wasn't passed to sub jom calls. (QTCREATORBUG-3729)
- /KEEPTEMPFILES was added for debugging purposes. (QTCREATORBUG-3852)
- Performance boost for incremental builds.
- Improved Ctrl-C handling for recursive make.

Changes since jom 1.0.2
- Support variable names with underscores. (QTCREATORBUG-3235)
- Keep order of dependencies on build. This is important for makefiles
lacking complete dependencies. These might fail in parallel builds
- Fix issues wrt environment variables. (QTCREATORBUG-3108)

Changes since jom 1.0.1
- Make target names case insensitive. (QTCREATORBUG-3037)
- Fix reading of include files without newline at the end.
- Repair the cmake project file for jom.

Changes since jom 1.0.0
- Cleaner and faster determination of targets that must be built.
- Fix incomplete up-to-date check for inference rule targets.
- Don't filter comments in inline files. (QTCREATORBUG-2874)

Changes since jom 0.9.4
- Inference rule batch mode implemented.
This improves performance for makefiles that make heavy use of the batch
mode, e.g. qmake generated makefiles.
- Improved command execution. No more batch file writing.
- Macro substitution implemented. Macro expansions like
$(TARGET:suffix=d) are now possible.
- .SUFFIXES content is handled properly.
- Fixed several bugs in file name macro expansion.
- Output of concurrent processes is explicitely separated.

Changes since jom 0.9.3
- Opening files from volume mounted to NTFS directory fixed.
- Output buffering issue fixed. (QTBUG-10798)

Changes since jom 0.9.2
- Support for multiple inline files per command line added.
- Its now possible to use "." as target name. (QTCREATORBUG-1131)
- Support file name macros in the file name part of inline file defitions.
- Multiple file name macros per command line are possible now.
- Single name macro invocation was added.
They can be invoked like this: $A instead of $(A).
- Several bugs related to file name macros have been fixed.
- Handle quoted arguments from command files correctly.

Changes since jom 0.9.1
- Fixed conditionals in preprocessor expressions. (QTCREATORBUG-1091)
- Improved parser error messages. Now we see the file, in which the
error occurred. (QTCREATORBUG-1114)

Changes since jom 0.9.0
- Having too many rules for a target is now a warning and not an error.
- Fixed several bugs in the preprocessor expression parser, e.g.

Changes since jom 0.8.9
- Reset the ERRORLEVEL to zero, if command's exit code should be ignored.
- Command files can be used to pass command line options to jom.
Usage: jom @commands.txt
- ANTLR isn't used anymore. We're using QLALR to generate the parser for
preprocessor expressions now. This makes building jom much easier.

Version History

Version Downloads Last updated Status
jom 1.1.1 592 Friday, July 8, 2016 approved
jom 1.1.0 1186 Saturday, October 3, 2015 approved
jom 1.0.16 219 Friday, July 10, 2015 approved

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