defineTest(minQtVersion) {
    maj = $$1
    min = $$2
    patch = $$3
    isEqual(QT_MAJOR_VERSION, $$maj) {
        isEqual(QT_MINOR_VERSION, $$min) {
            isEqual(QT_PATCH_VERSION, $$patch) {
                return(true)
            }
            greaterThan(QT_PATCH_VERSION, $$patch) {
                return(true)
            }
        }
        greaterThan(QT_MINOR_VERSION, $$min) {
            return(true)
        }
    }
    greaterThan(QT_MAJOR_VERSION, $$maj) {
        return(true)
    }
    return(false)
}

# Copies the given files to the destination directory
defineTest(copyToDestdir) {
    files = $$1
    DDIR = $$2
    mkpath($$DDIR)

    for(FILE, files) {

        # Replace slashes in paths with backslashes for Windows
        win32{
            FILE ~= s,/,\\,g
            DDIR ~= s,/,\\,g
        }
        QMAKE_POST_LINK += $$QMAKE_COPY $$quote($$FILE) $$quote($$DDIR) $$escape_expand(\\n\\t)
    }

    export(QMAKE_POST_LINK)
}

# We use precompiled headers for more fast compilation source code.
defineReplace(set_PCH){
    macx:clang*{
    # Precompiled headers don't work with clang on macx.
    } else {
        CONFIG += precompile_header # Turn on creation precompiled headers (PCH).
        export(CONFIG) # export value to global variable.

        PRECOMPILED_HEADER = stable.h # Header file with all all static headers: libraries, static local headers.
        export(PRECOMPILED_HEADER) # export value to global variable

        win32-msvc* {
            PRECOMPILED_SOURCE = stable.cpp # MSVC need also cpp file.
            export(PRECOMPILED_SOURCE) # export value to global variable.
        }
    }
    return(true)
}

defineReplace(enable_ccache){
    # ccache support only Unix systems.
    unix {
        # This need for turn on ccache.
        *-g++{
            QMAKE_CC = ccache gcc
            export(QMAKE_CC) # export value to global variable.

            QMAKE_CXX = ccache g++
            export(QMAKE_CXX) # export value to global variable.
        }
        clang*{
            QMAKE_CC = ccache clang
            export(QMAKE_CC) # export value to global variable.

            QMAKE_CXX = ccache clang++
            export(QMAKE_CXX) # export value to global variable.
        }
    }
    return(true)
}

# Default prefix. Use for creation install path.
DEFAULT_PREFIX = /usr

# In debug mode on Unix system we use all usefull for us compilers keys for checking errors.
# Also trying make all possible for speed up build time.
unix {

# Key -isystem disable checking errors in system headers. Mark ignore warnings Qt headers.
ISYSTEM += \
    -isystem "$$[QT_INSTALL_HEADERS]" \
    -isystem "$$[QT_INSTALL_HEADERS]/QtWidgets" \
    -isystem "$$[QT_INSTALL_HEADERS]/QtXml" \
    -isystem "$$[QT_INSTALL_HEADERS]/QtGui" \
    -isystem "$$[QT_INSTALL_HEADERS]/QtXmlPatterns" \
    -isystem "$$[QT_INSTALL_HEADERS]/QtCore"

# Usefull GCC warnings keys.
GCC_DEBUG_CXXFLAGS += \
    -O0 \ # Turn off oprimization.
    $$ISYSTEM \ # Ignore warnings Qt headers.
    # Last gdb doesn't show debug symbols with Qt Creator (issue with Python 3 and debug scripts that use Python 2.7).
    # Solution to use older version gdb, that's why we use old standard of debug information.
    -gdwarf-3 \
    -Wall \
    -Wextra \
    -pedantic \
    -Weffc++ \
    -Woverloaded-virtual \
    -Wctor-dtor-privacy \
    -Wnon-virtual-dtor \
    -Wold-style-cast \
    -Wconversion \
    -Winit-self \
    -Wstack-protector \
    -Wunreachable-code \
    -Wcast-align \
    -Wcast-qual \
    -Wdisabled-optimization \
    -Wfloat-equal \
    -Wformat=2 \
    -Wimport \
    -Wmissing-include-dirs \
    -Wpacked \
    -Wredundant-decls \
    -Winline \
    -Winvalid-pch \
    -Wunsafe-loop-optimizations \
    -Wlong-long \
    -Wmissing-format-attribute \
    -Wswitch-default \
    -Wuninitialized \
    -Wvariadic-macros \
    -Wlogical-op \
    -Wnoexcept \
    -Wmissing-noreturn \
    -Wpointer-arith \
    -Wstrict-null-sentinel \
    -Wstrict-overflow=5 \
    -Wundef \
    -Wno-unused \
    -ftrapv

# Usefull Clang warnings keys.
CLANG_DEBUG_CXXFLAGS += \
    -O0 \ # Turn off oprimization.
    $$ISYSTEM \ # Ignore warnings Qt headers.
    # Last gdb doesn't show debug symbols with Qt Creator (issue with Python 3 and debug scripts that use Python 2.7).
    # Solution to use older version gdb, that's why we use old standard of debug information.
    -gdwarf-3 \
    -fparse-all-comments \
    -Wabi \
    -Wabstract-final-class \
    -Wabstract-vbase-init \
    -Waddress \
    -Waddress-of-array-temporary \
    -Waddress-of-temporary \
    -Waggregate-return \
    -Wall \
    -Wambiguous-macro \
    -Wambiguous-member-template \
    -Wanalyzer-incompatible-plugin \
    -Wanonymous-pack-parens \
    -Warc \
    -Warc-abi \
    -Warc-bridge-casts-disallowed-in-nonarc \
    -Warc-maybe-repeated-use-of-weak \
    -Warc-non-pod-memaccess \
    -Warc-performSelector-leaks \
    -Warc-repeated-use-of-weak \
    -Warc-retain-cycles \
    -Warc-unsafe-retained-assign \
    -Warray-bounds \
    -Warray-bounds-pointer-arithmetic \
    -Wasm \
    -Wasm-operand-widths \
    -Wassign-enum \
    -Watomic-properties \
    -Watomic-property-with-user-defined-accessor \
    -Wattributes \
    -Wauto-import \
    -Wauto-storage-class \
    -Wauto-var-id \
    -Wavailability \
    -Wbackslash-newline-escape \
    -Wbad-array-new-length \
    -Wbad-function-cast \
    -Wbind-to-temporary-copy \
    -Wbitfield-constant-conversion \
    -Wbitwise-op-parentheses \
    -Wbool-conversion \
    -Wbool-conversions \
    -Wbuiltin-macro-redefined \
    -Wbuiltin-requires-header \
    -Wc++-compat \
    -Wc++0x-compat \
    -Wc++0x-extensions \
    -Wc++0x-narrowing \
    -Wc++11-compat \
    -Wc++11-compat-pedantic \
    -Wc++11-compat-reserved-user-defined-literal \
    -Wc++11-extensions \
    -Wc++11-extra-semi \
    -Wc++11-long-long \
    -Wc++11-narrowing \
    -Wc11-extensions \
    -Wcast-align \
    -Wcast-of-sel-type \
    -Wcast-qual \
    -WCFString-literal \
    -Wchar-align \
    -Wchar-subscripts \
    -Wcomment \
    -Wcomments \
    -Wcompare-distinct-pointer-types \
    -Wcomplex-component-init \
    -Wconditional-type-mismatch \
    -Wconditional-uninitialized \
    -Wconfig-macros \
    -Wconstant-conversion \
    -Wconstant-logical-operand \
    -Wconstexpr-not-const \
    -Wconversion \
    -Wconversion-null \
    -Wno-covered-switch-default \
    -Wctor-dtor-privacy \
    -Wcustom-atomic-properties \
    -Wdangling-else \
    -Wdangling-field \
    -Wdangling-initializer-list \
    -Wdeclaration-after-statement \
    -Wdelegating-ctor-cycles \
    -Wdelete-incomplete \
    -Wdelete-non-virtual-dtor \
    -Wdeprecated \
    -Wdeprecated-declarations \
    -Wdeprecated-implementations \
    -Wdeprecated-objc-isa-usage \
    -Wdeprecated-objc-pointer-introspection \
    -Wdeprecated-objc-pointer-introspection-performSelector \
    -Wdeprecated-register \
    -Wdeprecated-writable-strings \
    -Wdirect-ivar-access \
    -Wdisabled-macro-expansion \
    -Wdisabled-optimization \
    -Wdiscard-qual \
    -Wdistributed-object-modifiers \
    -Wdiv-by-zero \
    -Wdivision-by-zero \
    -Wdocumentation \
    -Wdocumentation-deprecated-sync \
    -Wdocumentation-html \
    -Wdollar-in-identifier-extension \
    -Wduplicate-decl-specifier \
    -Wduplicate-enum \
    -Wduplicate-method-arg \
    -Wduplicate-method-match \
    -Wdynamic-class-memaccess \
    -Weffc++ \
    -Wembedded-directive \
    -Wempty-body \
    -Wempty-translation-unit \
    -Wendif-labels \
    -Wenum-compare \
    -Wenum-conversion \
    -Wexplicit-ownership-type \
    -Wextended-offsetof \
    -Wextern-initializer \
    -Wextra \
    -Wextra-semi \
    -Wextra-tokens \
    -Wflexible-array-extensions \
    -Wfloat-equal \
    -Wformat \
    -Wformat-extra-args \
    -Wformat-invalid-specifier \
    -Wformat-non-iso \
    -Wformat-nonliteral \
    -Wformat-security \
    -Wformat-y2k \
    -Wformat-zero-length \
    -Wformat=2 \
    -Wfour-char-constants \
    -Wgcc-compat \
    -Wgnu \
    -Wgnu-array-member-paren-init \
    -Wgnu-designator \
    -Wgnu-static-float-init \
    -Wheader-guard \
    -Wheader-hygiene \
    -Widiomatic-parentheses \
    -Wignored-attributes \
    -Wignored-qualifiers \
    -Wimplicit \
    -Wimplicit-atomic-properties \
    -Wimplicit-conversion-floating-point-to-bool \
    -Wimplicit-exception-spec-mismatch \
    -Wimplicit-fallthrough \
    -Wimplicit-fallthrough-per-function \
    -Wimplicit-function-declaration \
    -Wimplicit-int \
    -Wimplicit-retain-self \
    -Wimport \
    -Wimport-preprocessor-directive-pedantic \
    -Wincompatible-library-redeclaration \
    -Wincompatible-pointer-types \
    -Wincompatible-pointer-types-discards-qualifiers \
    -Wincomplete-implementation \
    -Wincomplete-module \
    -Wincomplete-umbrella \
    -Winherited-variadic-ctor \
    -Winit-self \
    -Winitializer-overrides \
    -Winline \
    -Wint-conversion \
    -Wint-conversions \
    -Wint-to-pointer-cast \
    -Wint-to-void-pointer-cast \
    -Winteger-overflow \
    -Winvalid-constexpr \
    -Winvalid-iboutlet \
    -Winvalid-noreturn \
    -Winvalid-offsetof \
    -Winvalid-pch \
    -Winvalid-pp-token \
    -Winvalid-source-encoding \
    -Winvalid-token-paste \
    -Wknr-promoted-parameter \
    -Wlanguage-extension-token \
    -Wlarge-by-value-copy \
    -Wliteral-conversion \
    -Wliteral-range \
    -Wlocal-type-template-args \
    -Wlogical-not-parentheses \
    -Wlogical-op-parentheses \
    -Wlong-long \
    -Wloop-analysis \
    -Wmain \
    -Wmain-return-type \
    -Wmalformed-warning-check \
    -Wmethod-signatures \
    -Wmicrosoft \
    -Wmicrosoft-exists \
    -Wmismatched-parameter-types \
    -Wmismatched-return-types \
    -Wmismatched-tags \
    -Wmissing-braces \
    -Wmissing-declarations \
    -Wmissing-field-initializers \
    -Wmissing-format-attribute \
    -Wmissing-include-dirs \
    -Wmissing-method-return-type \
    -Wmissing-noreturn \
    -Wmissing-prototypes \
    -Wmissing-selector-name \
    -Wmissing-sysroot \
    -Wmissing-variable-declarations \
    -Wmodule-conflict \
    -Wmost \
    -Wmultichar \
    -Wnarrowing \
    -Wnested-externs \
    -Wnewline-eof \
    -Wnon-gcc \
    -Wnon-literal-null-conversion \
    -Wnon-pod-varargs \
    -Wnon-virtual-dtor \
    -Wnonnull \
    -Wnonportable-cfstrings \
    -WNSObject-attribute \
    -Wnull-arithmetic \
    -Wnull-character \
    -Wnull-conversion \
    -Wnull-dereference \
    -Wodr \
    -Wold-style-cast \
    -Wold-style-definition \
    -Wout-of-line-declaration \
    -Wover-aligned \
    -Woverflow \
    -Woverlength-strings \
    -Woverloaded-shift-op-parentheses \
    -Woverloaded-virtual \
    -Woverriding-method-mismatch \
    -Wpacked \
    -Wparentheses \
    -Wparentheses-equality \
    -Wpedantic \
    -Wpointer-arith \
    -Wpointer-sign \
    -Wpointer-to-int-cast \
    -Wpointer-type-mismatch \
    -Wpredefined-identifier-outside-function \
    -Wprivate-extern \
    -Wprotocol \
    -Wprotocol-property-synthesis-ambiguity \
    -Wreadonly-iboutlet-property \
    -Wreceiver-expr \
    -Wreceiver-forward-class \
    -Wreceiver-is-weak \
    -Wredundant-decls \
    -Wreinterpret-base-class \
    -Wreorder \
    -Wrequires-super-attribute \
    -Wreserved-user-defined-literal \
    -Wreturn-stack-address \
    -Wreturn-type \
    -Wreturn-type-c-linkage \
    -Wsection \
    -Wselector \
    -Wselector-type-mismatch \
    -Wself-assign \
    -Wself-assign-field \
    -Wsemicolon-before-method-body \
    -Wsentinel \
    -Wsequence-point \
    -Wserialized-diagnostics \
    -Wshadow-ivar \
    -Wshift-count-negative \
    -Wshift-count-overflow \
    -Wshift-op-parentheses \
    -Wshift-overflow \
    -Wshift-sign-overflow \
    -Wshorten-64-to-32 \
    -Wsign-compare \
    -Wsign-conversion \
    -Wsign-promo \
    -Wsizeof-array-argument \
    -Wsizeof-array-decay \
    -Wsizeof-pointer-memaccess \
    -Wsometimes-uninitialized \
    -Wsource-uses-openmp \
    -Wstack-protector \
    -Wstatic-float-init \
    -Wstatic-in-inline \
    -Wstatic-local-in-inline \
    -Wstatic-self-init \
    -Wstrict-aliasing \
    -Wstrict-aliasing=0 \
    -Wstrict-aliasing=1 \
    -Wstrict-aliasing=2 \
    -Wstrict-overflow \
    -Wstrict-overflow=0 \
    -Wstrict-overflow=1 \
    -Wstrict-overflow=2 \
    -Wstrict-overflow=3 \
    -Wstrict-overflow=4 \
    -Wstrict-overflow=5 \
    -Wstrict-prototypes \
    -Wstrict-selector-match \
    -Wstring-compare \
    -Wstring-conversion \
    -Wstring-plus-int \
    -Wstrlcpy-strlcat-size \
    -Wstrncat-size \
    -Wsuper-class-method-mismatch \
    -Wswitch \
    -Wswitch-default \
    -Wsynth \
    -Wtautological-compare \
    -Wtautological-constant-out-of-range-compare \
    -Wtentative-definition-incomplete-type \
    -Wthread-safety \
    -Wthread-safety-analysis \
    -Wthread-safety-attributes \
    -Wthread-safety-beta \
    -Wthread-safety-precise \
    -Wtrigraphs \
    -Wtype-limits \
    -Wtype-safety \
    -Wtypedef-redefinition \
    -Wtypename-missing \
    -Wundeclared-selector \
    -Wundef \
    -Wundefined-inline \
    -Wundefined-internal \
    -Wundefined-reinterpret-cast \
    -Wunicode \
    -Wunicode-whitespace \
    -Wuninitialized \
    -Wunknown-warning-option \
    -Wunnamed-type-template-args \
    -Wunneeded-internal-declaration \
    -Wunneeded-member-function \
    -Wunsequenced \
    -Wunsupported-visibility \
    -Wunused \
    -Wunused-argument \
    -Wunused-command-line-argument \
    -Wunused-comparison \
    -Wunused-exception-parameter \
    -Wunused-function \
    -Wunused-label \
    -Wunused-member-function \
    -Wunused-parameter \
    -Wunused-private-field \
    -Wunused-result \
    -Wunused-sanitize-argument \
    -Wunused-value \
    -Wunused-variable \
    -Wunused-volatile-lvalue \
    -Wuser-defined-literals \
    -Wvarargs \
    -Wvariadic-macros \
    -Wvector-conversion \
    -Wvector-conversions \
    -Wvexing-parse \
    -Wvisibility \
    -Wvla \
    -Wvla-extension \
    -Wvolatile-register-var \
    -Wweak-template-vtables \
    -Wweak-vtables \
    -Wwrite-strings \
    -Wzero-length-array \
    -Qunused-arguments \
    -fcolor-diagnostics
} else {
# Don't use additional GCC and Clang keys on Windows system.
# Can't find way mark ignore Qt header on Windows.
GCC_DEBUG_CXXFLAGS += \
    -O0 \
    -Wall \
    -Wextra \
    -pedantic \

CLANG_DEBUG_CXXFLAGS += \
    -O0 \
    -Wall \
    -Wextra \
    -pedantic \
}
