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cmake/Modules/FindJava.cmake

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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#[=======================================================================[.rst:
FindJava
--------
Find Java
This module finds if Java is installed and determines where the
include files and libraries are. The caller may set variable ``JAVA_HOME``
to specify a Java installation prefix explicitly.
See also the :module:`FindJNI` module to find Java Native Interface (JNI).
.. versionadded:: 3.10
Added support for Java 9+ version parsing.
Specify one or more of the following components as you call this find module. See example below.
::
Runtime = Java Runtime Environment used to execute Java byte-compiled applications
Development = Development tools (java, javac, javah, jar and javadoc), includes Runtime component
IdlJ = Interface Description Language (IDL) to Java compiler
JarSigner = Signer and verifier tool for Java Archive (JAR) files
This module sets the following result variables:
::
Java_JAVA_EXECUTABLE = the full path to the Java runtime
Java_JAVAC_EXECUTABLE = the full path to the Java compiler
Java_JAVAH_EXECUTABLE = the full path to the Java header generator
Java_JAVADOC_EXECUTABLE = the full path to the Java documentation generator
Java_IDLJ_EXECUTABLE = the full path to the Java idl compiler
Java_JAR_EXECUTABLE = the full path to the Java archiver
Java_JARSIGNER_EXECUTABLE = the full path to the Java jar signer
Java_VERSION_STRING = Version of java found, eg. 1.6.0_12
Java_VERSION_MAJOR = The major version of the package found.
Java_VERSION_MINOR = The minor version of the package found.
Java_VERSION_PATCH = The patch version of the package found.
Java_VERSION_TWEAK = The tweak version of the package found (after '_')
Java_VERSION = This is set to: $major[.$minor[.$patch[.$tweak]]]
.. versionadded:: 3.4
Added the ``Java_IDLJ_EXECUTABLE`` and ``Java_JARSIGNER_EXECUTABLE``
variables.
The minimum required version of Java can be specified using the
:command:`find_package` syntax, e.g.
.. code-block:: cmake
find_package(Java 1.8)
NOTE: ``${Java_VERSION}`` and ``${Java_VERSION_STRING}`` are not guaranteed to
be identical. For example some java version may return:
``Java_VERSION_STRING = 1.8.0_17`` and ``Java_VERSION = 1.8.0.17``
another example is the Java OEM, with: ``Java_VERSION_STRING = 1.8.0-oem``
and ``Java_VERSION = 1.8.0``
For these components the following variables are set:
::
Java_FOUND - TRUE if all components are found.
Java_<component>_FOUND - TRUE if <component> is found.
Example Usages:
::
find_package(Java)
find_package(Java 1.8 REQUIRED)
find_package(Java COMPONENTS Runtime)
find_package(Java COMPONENTS Development)
#]=======================================================================]
include(${CMAKE_CURRENT_LIST_DIR}/CMakeFindJavaCommon.cmake)
# The HINTS option should only be used for values computed from the system.
set(_JAVA_HINTS)
if(_JAVA_HOME)
list(APPEND _JAVA_HINTS ${_JAVA_HOME}/bin)
endif()
if (WIN32)
macro (_JAVA_GET_INSTALLED_VERSIONS _KIND)
execute_process(COMMAND REG QUERY HKLM\\SOFTWARE\\JavaSoft\\${_KIND}
RESULT_VARIABLE _JAVA_RESULT
OUTPUT_VARIABLE _JAVA_VERSIONS
ERROR_QUIET)
if (NOT _JAVA_RESULT)
string (REGEX MATCHALL "HKEY_LOCAL_MACHINE\\\\SOFTWARE\\\\JavaSoft\\\\${_KIND}\\\\[0-9.]+" _JAVA_VERSIONS "${_JAVA_VERSIONS}")
if (_JAVA_VERSIONS)
# sort versions. Most recent first
## handle version 9 apart from other versions to get correct ordering
set (_JAVA_V9 ${_JAVA_VERSIONS})
list (FILTER _JAVA_VERSIONS EXCLUDE REGEX "${_KIND}\\\\9")
list (SORT _JAVA_VERSIONS)
list (REVERSE _JAVA_VERSIONS)
list (FILTER _JAVA_V9 INCLUDE REGEX "${_KIND}\\\\9")
list (SORT _JAVA_V9)
list (REVERSE _JAVA_V9)
list (APPEND _JAVA_VERSIONS ${_JAVA_V9})
foreach (_JAVA_HINT IN LISTS _JAVA_VERSIONS)
list(APPEND _JAVA_HINTS "[${_JAVA_HINT};JavaHome]/bin")
endforeach()
endif()
endif()
endmacro()
# search for installed versions for version 9 and upper
_JAVA_GET_INSTALLED_VERSIONS("JDK")
_JAVA_GET_INSTALLED_VERSIONS("JRE")
list(APPEND _JAVA_HINTS
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Development Kit\\1.9;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Development Kit\\1.8;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Development Kit\\1.7;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Development Kit\\1.6;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Development Kit\\1.5;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Development Kit\\1.4;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Development Kit\\1.3;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Runtime Environment\\1.9;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Runtime Environment\\1.8;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Runtime Environment\\1.7;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Runtime Environment\\1.6;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Runtime Environment\\1.5;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Runtime Environment\\1.4;JavaHome]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Runtime Environment\\1.3;JavaHome]/bin"
)
endif()
# Hard-coded guesses should still go in PATHS. This ensures that the user
# environment can always override hard guesses.
set(_JAVA_PATHS
/usr/lib/java/bin
/usr/share/java/bin
/usr/local/java/bin
/usr/local/java/share/bin
/usr/java/j2sdk1.4.2_04
/usr/lib/j2sdk1.4-sun/bin
/usr/java/j2sdk1.4.2_09/bin
/usr/lib/j2sdk1.5-sun/bin
/opt/sun-jdk-1.5.0.04/bin
/usr/local/jdk-1.7.0/bin
/usr/local/jdk-1.6.0/bin
)
find_program(Java_JAVA_EXECUTABLE
NAMES java
HINTS ${_JAVA_HINTS}
PATHS ${_JAVA_PATHS}
)
if(Java_JAVA_EXECUTABLE)
execute_process(COMMAND "${Java_JAVA_EXECUTABLE}" -version
RESULT_VARIABLE res
OUTPUT_VARIABLE var
ERROR_VARIABLE var # sun-java output to stderr
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_STRIP_TRAILING_WHITESPACE)
if( res )
if(var MATCHES "Unable to locate a Java Runtime to invoke|No Java runtime present, requesting install")
set(Java_JAVA_EXECUTABLE Java_JAVA_EXECUTABLE-NOTFOUND)
elseif(${Java_FIND_REQUIRED})
message( FATAL_ERROR "Error executing java -version" )
else()
message( STATUS "Warning, could not run java -version")
endif()
else()
# Extract version components (up to 4 levels) from "java -version" output.
set(_java_version_regex [[(([0-9]+)(\.([0-9]+)(\.([0-9]+)(_([0-9]+))?)?)?.*)]])
if(var MATCHES "java version \"${_java_version_regex}\"")
# Sun, GCJ, older OpenJDK
set(Java_VERSION_STRING "${CMAKE_MATCH_1}")
set(Java_VERSION_MAJOR "${CMAKE_MATCH_2}")
if (CMAKE_MATCH_4)
set(Java_VERSION_MINOR "${CMAKE_MATCH_4}")
else()
set(Java_VERSION_MINOR 0)
endif()
if (CMAKE_MATCH_6)
set(Java_VERSION_PATCH "${CMAKE_MATCH_6}")
else()
set(Java_VERSION_PATCH 0)
endif()
set(Java_VERSION_TWEAK "${CMAKE_MATCH_8}")
elseif(var MATCHES "openjdk version \"${_java_version_regex}\"")
# OpenJDK
set(Java_VERSION_STRING "${CMAKE_MATCH_1}")
set(Java_VERSION_MAJOR "${CMAKE_MATCH_2}")
if (CMAKE_MATCH_4)
set(Java_VERSION_MINOR "${CMAKE_MATCH_4}")
else()
set(Java_VERSION_MINOR 0)
endif()
if (CMAKE_MATCH_6)
set(Java_VERSION_PATCH "${CMAKE_MATCH_6}")
else()
set(Java_VERSION_PATCH 0)
endif()
set(Java_VERSION_TWEAK "${CMAKE_MATCH_8}")
elseif(var MATCHES "openjdk version \"([0-9]+)-[A-Za-z]+\"")
# OpenJDK 9 early access builds or locally built
set(Java_VERSION_STRING "1.${CMAKE_MATCH_1}.0")
set(Java_VERSION_MAJOR "1")
set(Java_VERSION_MINOR "${CMAKE_MATCH_1}")
set(Java_VERSION_PATCH "0")
set(Java_VERSION_TWEAK "")
elseif(var MATCHES "java full version \"kaffe-${_java_version_regex}\"")
# Kaffe style
set(Java_VERSION_STRING "${CMAKE_MATCH_1}")
set(Java_VERSION_MAJOR "${CMAKE_MATCH_2}")
set(Java_VERSION_MINOR "${CMAKE_MATCH_4}")
set(Java_VERSION_PATCH "${CMAKE_MATCH_6}")
set(Java_VERSION_TWEAK "${CMAKE_MATCH_8}")
else()
if(NOT Java_FIND_QUIETLY)
string(REPLACE "\n" "\n " ver_msg "\n${var}")
message(WARNING "Java version not recognized:${ver_msg}\nPlease report.")
endif()
set(Java_VERSION_STRING "")
set(Java_VERSION_MAJOR "")
set(Java_VERSION_MINOR "")
set(Java_VERSION_PATCH "")
set(Java_VERSION_TWEAK "")
endif()
set(Java_VERSION "${Java_VERSION_MAJOR}")
if(NOT "x${Java_VERSION}" STREQUAL "x")
foreach(c MINOR PATCH TWEAK)
if(NOT "x${Java_VERSION_${c}}" STREQUAL "x")
string(APPEND Java_VERSION ".${Java_VERSION_${c}}")
else()
break()
endif()
endforeach()
endif()
endif()
endif()
find_program(Java_JAR_EXECUTABLE
NAMES jar
HINTS ${_JAVA_HINTS}
PATHS ${_JAVA_PATHS}
)
find_program(Java_JAVAC_EXECUTABLE
NAMES javac
HINTS ${_JAVA_HINTS}
PATHS ${_JAVA_PATHS}
)
find_program(Java_JAVAH_EXECUTABLE
NAMES javah
HINTS ${_JAVA_HINTS}
PATHS ${_JAVA_PATHS}
)
find_program(Java_JAVADOC_EXECUTABLE
NAMES javadoc
HINTS ${_JAVA_HINTS}
PATHS ${_JAVA_PATHS}
)
find_program(Java_IDLJ_EXECUTABLE
NAMES idlj
HINTS ${_JAVA_HINTS}
PATHS ${_JAVA_PATHS}
)
find_program(Java_JARSIGNER_EXECUTABLE
NAMES jarsigner
HINTS ${_JAVA_HINTS}
PATHS ${_JAVA_PATHS}
)
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
if(Java_FIND_COMPONENTS)
set(_JAVA_REQUIRED_VARS)
foreach(component ${Java_FIND_COMPONENTS})
# User just want to execute some Java byte-compiled
If(component STREQUAL "Runtime")
list(APPEND _JAVA_REQUIRED_VARS Java_JAVA_EXECUTABLE)
if(Java_JAVA_EXECUTABLE)
set(Java_Runtime_FOUND TRUE)
endif()
elseif(component STREQUAL "Development")
list(APPEND _JAVA_REQUIRED_VARS Java_JAVA_EXECUTABLE Java_JAVAC_EXECUTABLE
Java_JAR_EXECUTABLE Java_JAVADOC_EXECUTABLE)
if(Java_VERSION VERSION_LESS "10")
list(APPEND _JAVA_REQUIRED_VARS Java_JAVAH_EXECUTABLE)
if(Java_JAVA_EXECUTABLE AND Java_JAVAC_EXECUTABLE
AND Java_JAVAH_EXECUTABLE AND Java_JAR_EXECUTABLE AND Java_JAVADOC_EXECUTABLE)
set(Java_Development_FOUND TRUE)
endif()
else()
if(Java_JAVA_EXECUTABLE AND Java_JAVAC_EXECUTABLE
AND Java_JAR_EXECUTABLE AND Java_JAVADOC_EXECUTABLE)
set(Java_Development_FOUND TRUE)
endif()
endif()
elseif(component STREQUAL "IdlJ")
list(APPEND _JAVA_REQUIRED_VARS Java_IDLJ_EXECUTABLE)
if(Java_IDLJ_EXECUTABLE)
set(Java_IdlJ_FOUND TRUE)
endif()
elseif(component STREQUAL "JarSigner")
list(APPEND _JAVA_REQUIRED_VARS Java_JARSIGNER_EXECUTABLE)
if(Java_JARSIGNER_EXECUTABLE)
set(Java_JarSigner_FOUND TRUE)
endif()
else()
message(FATAL_ERROR "Comp: ${component} is not handled")
endif()
endforeach()
list (REMOVE_DUPLICATES _JAVA_REQUIRED_VARS)
find_package_handle_standard_args(Java
REQUIRED_VARS ${_JAVA_REQUIRED_VARS} HANDLE_COMPONENTS
VERSION_VAR Java_VERSION
)
if(Java_FOUND)
foreach(component ${Java_FIND_COMPONENTS})
set(Java_${component}_FOUND TRUE)
endforeach()
endif()
else()
# Check for Development
if(Java_VERSION VERSION_LESS "10")
find_package_handle_standard_args(Java
REQUIRED_VARS Java_JAVA_EXECUTABLE Java_JAR_EXECUTABLE Java_JAVAC_EXECUTABLE
Java_JAVAH_EXECUTABLE Java_JAVADOC_EXECUTABLE
VERSION_VAR Java_VERSION_STRING
)
else()
find_package_handle_standard_args(Java
REQUIRED_VARS Java_JAVA_EXECUTABLE Java_JAR_EXECUTABLE Java_JAVAC_EXECUTABLE
Java_JAVADOC_EXECUTABLE
VERSION_VAR Java_VERSION_STRING
)
endif()
endif()
mark_as_advanced(
Java_JAVA_EXECUTABLE
Java_JAR_EXECUTABLE
Java_JAVAC_EXECUTABLE
Java_JAVAH_EXECUTABLE
Java_JAVADOC_EXECUTABLE
Java_IDLJ_EXECUTABLE
Java_JARSIGNER_EXECUTABLE
)
# LEGACY
set(JAVA_RUNTIME ${Java_JAVA_EXECUTABLE})
set(JAVA_ARCHIVE ${Java_JAR_EXECUTABLE})
set(JAVA_COMPILE ${Java_JAVAC_EXECUTABLE})
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