我的现有资料包括：我的代码（简单的main.cpp），第三方库EnvVar的头文件（TPLIB_INCLUDE），二进制库（位于TPLIB_BINARY_PATH中的若干.a文件）以及以下CMakeLists.txt：
# current source directory: CMAKE_CURRENT_SOURCE_DIR
# current binary directory: CMAKE_CURRENT_BINARY_DIR
# require 2.6 to get support for the simple IF construct
CMAKE_MINIMUM_REQUIRED(VERSION 2.6.0)
PROJECT( simpleapp)
SET( PROGNAME simpleapp )
SET( CMAKE_COLOR_MAKEFILE ON )
SET( CMAKE_VERBOSE_MAKEFILE ON )
SET( CMAKE_INCLUDE_CURRENT_DIR TRUE )
# the actual .cpp files go here
SET(project_SOURCES
main.cpp
)
# add here all files that need processing by Qt's MOC if there are any
set(project_MOC_SOURCES
# files would go here
)
# add here all files that will be processed by Qt's UIC
set(project_UIS
# all .ui files would go here
)
# additional Qt resources go here
set(project_RCCS
# all .qrc files would go here
)
# setup Qt
FIND_PACKAGE(Qt4 REQUIRED)
INCLUDE(${QT_USE_FILE})
QT4_WRAP_CPP(test_MOCS ${project_MOC_SOURCES})
QT4_WRAP_UI(test_UIS_H ${project_UIS})
QT4_WRAP_CPP(test_MOC_UI ${project_UIS_H})
QT4_ADD_RESOURCES(test_RCC_SRCS ${project_RCCS})
include_directories( ${CMAKE_BINARY_DIR} $ENV{TPLIB_INCLUDE})
ADD_EXECUTABLE( ${PROGNAME} ${project_SOURCES} ${test_MOCS} ${test_RCC_SRCS} ${test_MOC_UI} )
link_directories($ENV{TPLIB_BINARY_PATH})
TARGET_LINK_LIBRARIES(${PROGNAME} ${QT_LIBRARIES} lib_misc lib_tools)
make工程创建main.cpp.o一切正常。这样CMake就可以找到第三方头文件了。但是在链接时，ld会抱怨找不到-llib_misc和-llib_tools。
删除"link_directories"行或指定库的绝对名称会导致"No rule to make target /path/to/lib_misc.a"。
那么如何告诉CMake只使用这些库进行链接呢？