defineReplace(qtPlatformTargetSuffix) {
    ios:CONFIG(iphonesimulator, iphonesimulator|iphoneos): \
        suffix = _iphonesimulator
    else: \
        suffix =

    CONFIG(debug, debug|release) {
        !debug_and_release|build_pass {
            mac: return($${suffix}_debug)
            win32: return($${suffix}d)
        }
    }
    return($$suffix)
}

defineReplace(qtLibraryTarget) {
   LIBRARY_NAME = $$1
   mac:CONFIG(shared, static|shared):contains(QT_CONFIG, qt_framework) {
      QMAKE_FRAMEWORK_BUNDLE_NAME = $$LIBRARY_NAME
      export(QMAKE_FRAMEWORK_BUNDLE_NAME)
   } else {
       # insert the major version of Qt in the library name
       # unless it's a framework build
       LIBRARY_NAME ~= s,^Qt,Qt$$QT_MAJOR_VERSION,
   }
   return($$LIBRARY_NAME$$qtPlatformTargetSuffix())
}

defineTest(qtAddLibrary) {
    warning("qtAddLibrary() is deprecated. Use QT+= instead.")

    # Reverse-engineer the module name from the library name.
    for(var, QT_MODULES) {
        isEqual(QT.$${var}.name, $$1) {
            qtAddModule($$var, LIBS)
            return(true)
        }
    }
    error("No module matching library '$$1' found.")
}

# target variable, flag source variable
defineTest(qtProcessModuleFlags) {
    for(flag, $$2) {
        contains(flag, ^-.*): \
            $$1 -= $$replace(flag, ^-, )
        else: \
            $$1 += $$flag
    }
    export($$1)
}

# qt module
defineTest(qtHaveModule) {
    !isEmpty(QT.$$replace(1, -, _).name): \
        return(true)
    return(false)
}

# qt module, libs variable
defineTest(qtAddModule) {
    MODULE_NAME = $$eval(QT.$${1}.name)
    MODULE_INCLUDES = $$eval(QT.$${1}.includes)
    MODULE_LIBS = $$eval(QT.$${1}.libs)
    MODULE_CONFIG = $$eval(QT.$${1}.module_config)

    contains(MODULE_CONFIG, internal_module) {
        using_privates = true
        export(using_privates)
    }

    qtProcessModuleFlags(CONFIG, QT.$${1}.CONFIG)
    qtProcessModuleFlags(DEFINES, QT.$${1}.DEFINES)

    MODULE_INCLUDES -= $$QMAKE_DEFAULT_INCDIRS
    MODULE_LIBS_ADD = $$MODULE_LIBS
    MODULE_LIBS_ADD -= $$QMAKE_DEFAULT_LIBDIRS

    unset(LINKAGE)
    mac:contains(MODULE_CONFIG, lib_bundle) {
          FRAMEWORK_INCLUDE = $${MODULE_LIBS}/$${MODULE_NAME}.framework/Headers
          !qt_no_framework_direct_includes:exists($$FRAMEWORK_INCLUDE) {
               INCLUDEPATH *= $$FRAMEWORK_INCLUDE
          }
          contains(MODULE_CONFIG, internal_module): \
               INCLUDEPATH += \
                    $$FRAMEWORK_INCLUDE/$$eval(QT.$${1}.VERSION) \
                    $$FRAMEWORK_INCLUDE/$$eval(QT.$${1}.VERSION)/$$MODULE_NAME
          QMAKE_FRAMEWORKPATH *= $${MODULE_LIBS}
          export(QMAKE_FRAMEWORKPATH)
          !contains(MODULE_CONFIG, no_link): \
               LINKAGE += -framework $${MODULE_NAME}$${QT_LIBINFIX}
    } else {
          INCLUDEPATH *= $$MODULE_INCLUDES
    }
    export(INCLUDEPATH)

    # Only link to this module if a libs directory is set, else this is just a module
    # to give access to sources or include files, and not for linking.
    !isEmpty(MODULE_LIBS):!contains(MODULE_CONFIG, no_link) {

        # Re-insert the major version in the library name (cf qtLibraryTarget above)
        # unless it's a framework build
        !mac|!contains(MODULE_CONFIG, lib_bundle): \
            MODULE_NAME ~= s,^Qt,Qt$$QT_MAJOR_VERSION,

        win32 {
            # Make sure the version number isn't appended again to the lib name
            ver_var    = QMAKE_$${upper($$MODULE_NAME$$QT_LIBINFIX)}_VERSION_OVERRIDE
            dver_var   = QMAKE_$${upper($$MODULE_NAME$$QT_LIBINFIX)}D_VERSION_OVERRIDE
            $$ver_var  = 0
            $$dver_var = 0
            export($$ver_var)
            export($$dver_var)
        }

        isEmpty(LINKAGE) {
            !isEmpty(MODULE_LIBS_ADD): \
                LINKAGE = -L$$MODULE_LIBS_ADD
            lib = $${MODULE_NAME}$${QT_LIBINFIX}$$qtPlatformTargetSuffix()
            LINKAGE += -l$$lib

            contains(QT_CONFIG, rpath) {
                QMAKE_RPATHDIR *= $$eval(QT.$${1}.rpath)
                export(QMAKE_RPATHDIR)
            }

            contains(MODULE_CONFIG, staticlib) {
                PRE_TARGETDEPS *= $$MODULE_LIBS/$${QMAKE_PREFIX_STATICLIB}$${lib}.$${QMAKE_EXTENSION_STATICLIB}
                export(PRE_TARGETDEPS)
            }
        }

        $$2 += $$LINKAGE
        export($$2)

        !isEmpty(QMAKE_LSB) {
            !isEmpty(MODULE_LIBS_ADD): \
                QMAKE_LFLAGS *= --lsb-libpath=$$MODULE_LIBS_ADD
            QMAKE_LFLAGS *= --lsb-shared-libs=$${MODULE_NAME}$${QT_LIBINFIX}
            QMAKE_LIBDIR *= /opt/lsb/lib
            export(QMAKE_LFLAGS)
            export(QMAKE_LIBDIR)
        }
    }
}

# qt variable, libs variable
defineTest(qtAddModules) {
    # qmake variables cannot contain dashes, so normalize the names first
    $$1 = $$replace($$1, -private$, _private)
    # Topological resolution of modules based on their QT.<module>.depends variable
    $$1 = $$resolve_depends($$1, "QT.")
    # Finally actually add the modules
    unset(BAD_QT)
    for(QTLIB, $$1) {
        QTLIBNAME = $$eval(QT.$${QTLIB}.name)
        isEmpty(QTLIBNAME) {
            BAD_QT += $$QTLIB
            next()
        }

        target_qt:isEqual(TARGET, $$QTLIBNAME) {
            warning("$$TARGET cannot have a $$1 of $$QTLIB")
            next()
        }

        qtAddModule($$QTLIB, $$2)
    }
    !isEmpty(BAD_QT):error("Unknown module(s) in $$1: $$replace(BAD_QT, _private$, -private)")
}

defineTest(qtAddRpathLink) {
    # -rpath-link is used by the linker to find dependencies of dynamic
    # libraries which were NOT specified on the command line.
    # This means that paths of direct dependencies (QT & QT_PRIVATE)
    # don't need to appear here. However, their private dependencies'
    # paths OTOH need to be put there.
    pubqt = $$replace(1, -private$, _private)
    pubdep = $$resolve_depends(pubqt, "QT.")
    privdep = $$resolve_depends(pubqt, "QT.", ".depends" ".private_depends" ".run_depends")
    privdep -= $$pubdep
    rpaths =
    for(dep, privdep): \
        rpaths += $$eval(QT.$${dep}.libs)
    QMAKE_RPATHLINKDIR *= $$unique(rpaths)
    export(QMAKE_RPATHLINKDIR)
}

# variable, default, [suffix for variable for system() use], [prepare primary variable for system() use]
defineTest(qtPrepareTool) {
    cmd = $$eval(QT_TOOL.$${2}.binary)
    isEmpty(cmd) {
        cmd = $$[QT_HOST_BINS]/$$2
        exists($${cmd}.pl) {
            cmd = perl -w $$system_path($${cmd}.pl)
        } else: contains(QMAKE_HOST.os, Windows) {
            cmd = $$system_path($${cmd}.exe)
        } else:contains(QMAKE_HOST.os, Darwin) {
            BUNDLENAME = $${cmd}.app/Contents/MacOS/$$2
            exists($$BUNDLENAME) {
                cmd = $$BUNDLENAME
            }
        }
    }
    QT_TOOL_ENV += $$eval(QT_TOOL.$${2}.envvars)
    !isEmpty(3)|!isEmpty(4) {
        $$1$$3 =
        for (arg, cmd): \
            $$1$$3 += $$system_quote($$arg)
        qtAddTargetEnv($$1$$3, QT_TOOL.$${2}.depends, system)
    }
    isEmpty(4) {
        $$1 =
        for (arg, cmd): \
            $$1 += $$shell_quote($$arg)
        qtAddTargetEnv($$1, QT_TOOL.$${2}.depends, )
    }
}

# target variable, list of env var names, [non-empty: prepare for system(), not make]
defineTest(qtAddToolEnv) {
    isEmpty(3): \
        ds = $$QMAKE_DIR_SEP
    else: \
        ds = $$DIR_SEPARATOR
    for(env, 2) {
        value = $$eval($${env}.value)
        !isEmpty(value) {
            name = $$eval($${env}.name)
            equals(ds, /) {
                contains($${env}.CONFIG, prepend): infix = \${$$name:+:\$$$name}
                else: infix =
                val = "$$name=$$join(value, :)$$infix"
            } else {
                # Escape closing parens when expanding the variable, otherwise cmd confuses itself.
                contains($${env}.CONFIG, prepend): infix = ;%$$name:)=^)%
                else: infix =
                val = "(set $$name=$$join(value, ;)$$infix) &"
            }
            isEmpty(3): !contains(TEMPLATE, vc.*) {
                contains(MAKEFILE_GENERATOR, MS.*): val ~= s,%,%%,g
                val ~= s,\\\$,\$\$,g
            }
            $$1 = "$$val $$eval($$1)"
        }
    }
    export($$1)
}

# target variable, dependency var name, [non-empty: prepare for system(), not make]
defineTest(qtAddTargetEnv) {
    deps = $$replace($$2, -private$, _private)
    deps = $$resolve_depends(deps, "QT.", ".depends" ".private_depends" ".run_depends")
    !isEmpty(deps) {
        ptypes =
        for(dep, deps) {
            isEmpty(3): \
                deppath += $$shell_path($$eval(QT.$${dep}.libs))
            else: \
                deppath += $$system_path($$eval(QT.$${dep}.libs))
            ptypes += $$eval(QT.$${dep}.plugin_types)
        }
        equals(QMAKE_HOST.os, Windows) {
            deppath.name = PATH
        } else:contains(QMAKE_HOST.os, Linux|FreeBSD|OpenBSD|NetBSD|DragonFly|SunOS|HP-UX|QNX|GNU) {
            deppath.name = LD_LIBRARY_PATH
        } else:equals(QMAKE_HOST.os, Darwin) {
            contains(QT_CONFIG, qt_framework): \
                deppath.name = DYLD_FRAMEWORK_PATH
            else: \
                deppath.name = DYLD_LIBRARY_PATH
        } else:equals(QMAKE_HOST.os, AIX) {
            deppath.name = LIBPATH
        } else {
            error("Operating system not supported.")
        }
        deppath.value = $$unique(deppath)
        deppath.CONFIG = prepend

        pluginpath.value =
        ppaths = $$[QT_INSTALL_PLUGINS/get]
        for(qplug, QT_PLUGINS): \
            contains(ptypes, QT_PLUGIN.$${qplug}.TYPE): \
                ppaths += $$eval(QT_PLUGIN.$${qplug}.PATH)
        ppaths = $$unique(ppaths)
        for(qplug, ppaths) {
            isEmpty(3): \
                pluginpath.value += $$shell_path($$qplug)
            else: \
                pluginpath.value += $$system_path($$qplug)
        }
        pluginpath.name = QT_PLUGIN_PATH

        QT_TOOL_ENV += deppath pluginpath
    }
    qtAddToolEnv($$1, $$QT_TOOL_ENV, $$3)
}

defineReplace(pkgConfigExecutable) {
    isEmpty(PKG_CONFIG) {
        PKG_CONFIG = pkg-config

        !isEmpty(PKG_CONFIG_SYSROOT_DIR) {
            win32:isEmpty(MINGW_IN_SHELL):PKG_CONFIG = set PKG_CONFIG_SYSROOT_DIR=$$PKG_CONFIG_SYSROOT_DIR& $$PKG_CONFIG
            else:PKG_CONFIG = PKG_CONFIG_SYSROOT_DIR=\"$$PKG_CONFIG_SYSROOT_DIR\" $$PKG_CONFIG
        }

        !isEmpty(PKG_CONFIG_LIBDIR) {
            win32:isEmpty(MINGW_IN_SHELL):PKG_CONFIG = set PKG_CONFIG_LIBDIR=$$PKG_CONFIG_LIBDIR& $$PKG_CONFIG
            else:PKG_CONFIG = PKG_CONFIG_LIBDIR=\"$$PKG_CONFIG_LIBDIR\" $$PKG_CONFIG
        }
    }

    equals(QMAKE_HOST.os, Windows): \
        PKG_CONFIG += 2> NUL
    else: \
        PKG_CONFIG += 2> /dev/null

    return($$PKG_CONFIG)
}

defineTest(packagesExist) {
    contains(QT_CONFIG, no-pkg-config):return(false)

    # this can't be done in global scope here because qt_functions is loaded
    # before the .pro is parsed, so if the .pro set PKG_CONFIG, we wouldn't know it
    # yet. oops.
    pkg_config = $$pkgConfigExecutable()

    for(package, ARGS) {
        !system($$pkg_config --exists $$package):return(false)
    }

    return(true)
}

# Prepares target that will iterate through all subdirs (except those
# with no_default_target or no_{name_of_target}_target. The prepared
# target must still be manually added to QMAKE_EXTRA_TARGETS.
defineTest(prepareRecursiveTarget) {
    target = $$1
    no_$${target}_target: return()

    for(subdir, SUBDIRS) {
        subdir_config = $$eval($${subdir}.CONFIG)
        contains(subdir_config, no_default_target): next()
        contains(subdir_config, no_$${target}_target): next()

        $${target}.recurse += $$subdir
    }

    # Set up the recurse target only when there
    # is something to recurse into.
    isEmpty($${target}.recurse): return()

    $${target}.CONFIG = recursive
    $${target}.recurse_target = $${target}

    export($${target}.recurse)
    export($${target}.CONFIG)
    export($${target}.recurse_target)
}