Qt创建生成pkg-config工程库的方法

1、文件：qmake-example.pro

## We get the PREFIX, QMAKE_EXAMPLE_MAJOR_VERSION, QMAKE_EXAMPLE_SOVERSION,
## QMAKE_EXAMPLE_MINOR_VERSION, QMAKE_EXAMPLE_PATCH_VERSION,
## QMAKE_EXAMPLE_CURRENT_VERSION, QMAKE_EXAMPLE_REVISION_VERSION,
## QMAKE_EXAMPLE_VERSION and QMAKE_EXAMPLE_AGE_VERSION from this project-wide
## qmake-example.pri include file.

include(../../../qmake-example.pri)

## In qmake we have to remove qt explicitly if we don't want to link against it

CONFIG -= qt

## We will use the standard lib template of qmake

TEMPLATE = lib

# In qmake you need to use this VERSION variable for libtool's -version-info

VERSION = $${QMAKE_EXAMPLE_VERSION}

## We will therefor also make ourselves a semver-version, to be put in
## the config.h as a VERSION #define.

SEMVER_VERSION = $${QMAKE_EXAMPLE_MAJOR_VERSION}"."$