5

我正在尝试在同一个 CMakeLists.txt 文件中为 32 位和 64 位编译一些代码。我认为最简单的方法是使用函数。编译中使用的（静态）库也构建在 CMakeLists.txt 文件中。然而，尽管将它们构建在不同的目录中，CMake 抱怨说：

add_library cannot create target "mylib" because another target with
the same name already exists.  The existing target is a static library
created in source directory "/home/chris/proj".

问题代码是：

cmake_minimum_required (VERSION 2.6 FATAL_ERROR)

enable_language(Fortran)
project(myproj)

set(libfolder ${PROJECT_SOURCE_DIR}/lib/)

function(build bit)

  message("Build library")
  set(BUILD_BINARY_DIR ${PROJECT_BINARY_DIR}/rel-${bit})
  set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${BUILD_BINARY_DIR}/bin)
  add_library(mylib STATIC ${libfolder}/mylib.for)
  set(CMAKE_Fortran_FLAGS "-m${bit}")

endfunction()

build(32)
build(64)

我确定我遗漏了一些明显的东西，但看不到问题...

4

2 回答 2

3

正如我在评论中所说，这是我们如何做到这一点的一个例子。

if( CMAKE_SIZEOF_VOID_P EQUAL 8 )
    MESSAGE( "64 bits compiler detected" )
    SET( EX_PLATFORM 64 )
    SET( EX_PLATFORM_NAME "x64" )
else( CMAKE_SIZEOF_VOID_P EQUAL 8 ) 
    MESSAGE( "32 bits compiler detected" )
    SET( EX_PLATFORM 32 )
    SET( EX_PLATFORM_NAME "x86" )
endif( CMAKE_SIZEOF_VOID_P EQUAL 8 )

... 

IF( EX_PLATFORM EQUAL 64 )
MESSAGE( "Outputting to lib64 and bin64" )

# ---------- Setup output Directories -------------------------
SET (CMAKE_LIBRARY_OUTPUT_DIRECTORY
   ${YourSoftwarePath}/lib64
   CACHE PATH
   "Single Directory for all Libraries"
   )

# --------- Setup the Executable output Directory -------------
SET (CMAKE_RUNTIME_OUTPUT_DIRECTORY
   ${YourSoftwarePath}/bin64
   CACHE PATH
   "Single Directory for all Executables."
   )

# --------- Setup the Executable output Directory -------------
SET (CMAKE_ARCHIVE_OUTPUT_DIRECTORY
   ${YourSoftwarePath}/lib64
   CACHE PATH
   "Single Directory for all static libraries."
   )
ELSE( EX_PLATFORM EQUAL 64 )
# ---------- Setup output Directories -------------------------
SET (CMAKE_LIBRARY_OUTPUT_DIRECTORY
   ${YourSoftwarePath}/lib
   CACHE PATH
   "Single Directory for all Libraries"
   )

# --------- Setup the Executable output Directory -------------
SET (CMAKE_RUNTIME_OUTPUT_DIRECTORY
   ${YourSoftwarePath}/bin
   CACHE PATH
   "Single Directory for all Executables."
   )

# --------- Setup the Executable output Directory -------------
SET (CMAKE_ARCHIVE_OUTPUT_DIRECTORY
   ${YourSoftwarePath}/lib
   CACHE PATH
   "Single Directory for all static libraries."
   )
ENDIF( EX_PLATFORM EQUAL 64 )

...


add_library(YourSoftware SHARED
    ${INCLUDES}
    ${SRC}
)

即使在我们的生产过程中，它对我们也很有效。

它允许我们为 32 位和 64 位准备好我们的配置。之后，我们必须在两个平台上进行构建。

于 2013-06-26T10:28:02.143 回答
1

<name>指定的 in对应add_library于逻辑目标名称，并且在项目中必须是全局唯一的。因此，您定义相同的目标 (mylib) 两次，这是被禁止的。但是，您可以定义两个不同的目标并指定目标的输出名称以再次产生相同的库名称：

add_library(mylib${bit} STATIC ${libfolder}/mylib.for)
set_target_properties(mylib${bit} PROPERTIES OUTPUT_NAME mylib)

http://www.cmake.org/cmake/help/v3.0/command/add_library.html http://www.cmake.org/cmake/help/v3.0/command/set_target_properties.html

于 2015-08-20T08:15:37.403 回答