Question

我正在尝试构建一个静态库并将其用于编译 fortran档案。如果我这样做：

set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})
add_library(mylib STATIC ${lib_src}/mylib.for)
file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
add_executable(bin/out ${PROJECT_SOURCE_DIR}/src/program.f)
target_link_libraries(bin/out mylib)

然后一切正常（请注意该库内置于二进制目录中 root，但是fortran被编译成子目录）;但是，如果我这样做

set(archives ${PROJECT_BINARY_DIR}/lib)
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
add_library(mylib STATIC ${lib_src}/mylib.for)
find_library(mylib NAMES mylib PATHS ${archives})
file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
add_executable(bin/out ${PROJECT_SOURCE_DIR}/src/program.f)
target_link_libraries(bin/out mylib)

运行cmake时出错：

CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:   

mylib linked by target "bin/out" in directory /home/chris/project

如果我遗漏了最后两行，那么归档文件确实会得到写入lib子目录，如预期的那样libmylib.a。如果我做

set(archives ${PROJECT_BINARY_DIR}/lib)
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
add_library(mylib STATIC ${lib_src}/mylib.for)
find_library(mylib NAMES mylib PATHS ${archives})
include_directories(${archives})
set(libs ${libs} ${mylib})
file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
add_executable(bin/out ${PROJECT_SOURCE_DIR}/src/program.f)
target_link_libraries(bin/out {LIBS})

然后cmake命令运行正常，但运行make然后生成编译错误（我知道set命令和target_link_libraries 变量是不同的情况 - 我不明白的事情之一这就是为什么这只在make运行时失败，而不是cmake;如果变量是相同的情况，然后我得到与上面相同的错误。）

那么，我怎样才能让CMake认出我的${PROJECT_BINARY_DIR}/lib 在CMake运行期间创建的文件夹？有人可以指出我的（可能很明显）错误？！

Answer 1

您不应在其中一个目标上使用find_library，请删除该行：

find_library(mylib NAMES mylib PATHS ${archives})

CMake已经知道mylib库，因为它是其目标之一，并且调用find_library阴影mylib变量。

您可以让target_link_libraries调用相同的内容，因为参数可以是库或目标的路径.r

在CMake中查找目录

1 个答案: