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)
   }
   return($$LIBRARY_NAME$$qtPlatformTargetSuffix())
}

defineReplace(qt5LibraryTarget) {
   LIBRARY_NAME = $$qtLibraryTarget($$1)
   isEmpty(QMAKE_FRAMEWORK_BUNDLE_NAME) {
       # 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)
}

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) {
            QT += $$var
            export(QT)
            return(true)
        }
    }
    error("No module matching library '$$1' found.")
}

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

# 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=$$shell_quote($$join(value, :))$$infix"
            } else {
                # Escape closing parens when expanding the variable, otherwise cmd confuses itself.
                contains($${env}.CONFIG, prepend): infix = ;%$$name:)=^)%
                else: infix =
                value ~= s,\\),^),g
                val = "(set $$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 = $$resolve_depends(deps, "QT.", ".depends" ".run_depends")
    !isEmpty(deps) {
        ptypes =
        for(dep, deps) {
            isEmpty(3): \
                deppath += $$shell_path($$eval(QT.$${dep}.libs))
            else: \
                deppath += $$system_path($$eval(QT.$${dep}.libs))
            ptypes += $$eval(QT.$${dep}.plugin_types)
        }
        equals(QMAKE_HOST.os, Windows) {
            deppath.name = PATH
        } else:contains(QMAKE_HOST.os, Linux|FreeBSD|OpenBSD|NetBSD|DragonFly|SunOS|HP-UX|QNX|GNU) {
            deppath.name = LD_LIBRARY_PATH
        } else:contains(QMAKE_HOST.os, Haiku) {
            deppath.name = LIBRARY_PATH
        } else:equals(QMAKE_HOST.os, Darwin) {
            contains(QT_CONFIG, qt_framework): \
                deppath.name = DYLD_FRAMEWORK_PATH
            else: \
                deppath.name = DYLD_LIBRARY_PATH
        } else:equals(QMAKE_HOST.os, AIX) {
            deppath.name = LIBPATH
        } else {
            error("Operating system not supported.")
        }
        deppath.value = $$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

        sysroot.name = PKG_CONFIG_SYSROOT_DIR
        sysroot.value = $$PKG_CONFIG_SYSROOT_DIR
        libdir.name = PKG_CONFIG_LIBDIR
        libdir.value = $$PKG_CONFIG_LIBDIR
        qtAddToolEnv(PKG_CONFIG, sysroot libdir, SYS)
    }

    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)
}