字符串正则表达式替换需要6 args but..MinGW、CMake、w7

Question

我试图在w7中构建一个应用程序，在CentOS 6.5上使用，没有问题，但我需要为CentOS 32位和64位进行编译。这个程序使用RTi库，但是Win库是为VS2010开发的，我将使用MinGW Gcc 4.x.x、CMake 2.8.12和Maven 3.02构建。我纠正了一些数据类型不兼容的问题，但我认为MinGW和Windows7之间的斜杠和正斜杠可能存在一些问题。基类程序编译成功，现在是二进制程序的时候了。当我执行cmake -G "MinGW Makefiles“表达式时，我会得到以下错误。

CMake Error at C:/Workspace/trunk/IB/src/make/IB.Utils.cmake:43 (string):
  string sub-command REGEX, mode REPLACE needs at least 6 arguments total to
  command.
Call Stack (most recent call first):
  C:/Workspace/trunk/IB/src/make/IB.Utils.cmake:116 (RemoveCXXComments)
  C:/Workspace/trunk/IB/src/make/IB.DDS.cmake:12 (HasInterfaces)
  C:/Workspace/trunk/IB/src/make/IB.DDS.cmake:59 (GetDDSGeneratedFiles)
  CMakeLists.txt:6 (GenerateIDLLibrary)


 CMake Error at C:/Workspace/trunk/IB/src/make/IB.Utils.cmake:43 (string):
  string sub-command REGEX, mode REPLACE needs at least 6 arguments total to
  command.
Call Stack (most recent call first):
  C:/Workspace/trunk/IB/src/make/IB.Utils.cmake:65 (RemoveCXXComments)
  C:/Workspace/trunk/IB/src/make/IB.DDS.cmake:74 (FindIncludes)
  CMakeLists.txt:6 (GenerateIDLLibrary)


Includes for 'C:/MinGW/msys/1.0/home/blcoalla/trunk/Example/TestProfiles/TestPayload.idl'        are
CMake Error at C:/Workspace/trunk/IB/src/make/IB.Utils.cmake:43 (string):
  string sub-command REGEX, mode REPLACE needs at least 6 arguments total to
  command.
Call Stack (most recent call first):
  C:/Workspace/trunk/IB/src/make/IB.Utils.cmake:65 (RemoveCXXComments)
  C:/Workspace/trunk/IB/src/make/IB.DDS.cmake:111 (FindIncludes)
  CMakeLists.txt:6 (GenerateIDLLibrary)

以下是utils.cmake的摘录：

Macro to get the content of a file

-----------------------------------------------------------------

宏(GetFileContent OutFile)

  #message("Called GetFileContent '${ARGN}'")
  SET(cat_prog cat)
  IF(WIN32)
    IF(NOT UNIX)
      SET(cat_prog type)
    ELSE(NOT UNIX)
      message (FATAL_ERROR "cannot determine the system to call to proper 'cat/type'     method")
    ENDIF(NOT UNIX)
  ENDIF(WIN32)

  set (Out)
  set (tmp)

  foreach(gfcfile ${ARGN})

    if (NOT EXISTS ${gfcfile})
      message(FATAL_ERROR "Cannot find file '${gfcfile}'")
    endif(NOT EXISTS ${gfcfile})

    EXECUTE_PROCESS(COMMAND ${cat_prog} ${gfcfile}
                    OUTPUT_VARIABLE tmp)
    set (Out ${Out} ${tmp})

  endforeach(gfcfile ${ARGN})

  set(${OutFile} ${Out})
  #message("Leaving GetFileContent")

endmacro(GetFileContent)
#-----------------------------------------------------------------

# Macro to get includes from an IDL file
#-----------------------------------------------------------------
macro (RemoveCXXComments Output Input)

  #message("RemoveCXXComments Input: '${Input}'")
  # Remove single line comments
  string(REGEX REPLACE "(//[^\n]*\n)" "" ${Output} ${Input})
  #message("RemoveCXXComments without single line: '${${Output}}'")

  # Remove several line comments in file
  string(REGEX REPLACE "(/\\*([^*]|[\r\n]|(\\*+([^*/]|[\r\n])))*\\*+/)" "" FileContent         ${FileContent})
  #message("RemoveCXXComments without multi line: '${${Output}}'")

endmacro (RemoveCXXComments)
#-----------------------------------------------------------------






from CMakeLists.txt6:
GenerateIDLLibrary(TestPayload TestPayload.idl)

from IB.DDS.cmake:59:
# Get expected generated files
GetDDSGeneratedFiles(DDSCXXGeneratedFiles DDSHGeneratedFiles ${IdlFile})
# message("CXX Files expected to be generated:     '${DDSCXXGeneratedFiles}'")
#message("H Files expected to be generated:    '${DDSHGeneratedFiles}'")

Answer 1

错误消息是您的一个变量为空的提示。您可以输出变量并检查哪个变量是空的，不应该是空的。我猜Windows的某些地方失败了，并且没有设置变量。如果变量为空或未设置，CMake根本看不到您提供了一个参数。

如果要强制执行正则表达式，可以在参数周围加上引号。然后，CMake知道您给出了正确的参数数，并且它并不抱怨"“作为一个论点。但这并不能解决你真正的问题，而只能平息你当前的问题。我不建议你这样做，直到你真正知道这是可以的。

Answer 2

输出或输入或FileContent都是未定义的。错误必须在其他地方，您可能会使用

if( DEFINED ${Output} )
    message( "Output defined")

来检查它们的一致性。

->作为一个提示，如果您编写了这段代码，您可能会替换

${variable}

使用

"${variable}

为了避免使用未定义的变量(如果"“字符串更可取，则仍然需要解决为什么要使用未定义变量)。