用clang和gfortran编译

Compiling with clang and gfortran

本文关键字：编译 gfortran clang      更新时间：2023-10-16

我正在尝试编译一个我最近开始工作的项目，并且被要求用clang而不是gcc编译代码。有一个CMake文件的项目，我试图使用CMake项目

cmake -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ ../src

但是抛出了一个错误，我相信这是因为clang没有Fortran编译器，而项目的一部分有Fortran代码。是否有一种方法可以使它在编译Fortran代码时使用gfortran(以前使用gcc时使用)，其余部分使用clang/clang++ ?

我认为cmake文件中相关的部分是:

enable_language(Fortran)
string(REGEX MATCH gfortran HAVE_GFORTRAN ${CMAKE_Fortran_COMPILER})
string(REGEX MATCH xlf HAVE_XLF ${CMAKE_Fortran_COMPILER})
string(REGEX MATCH pg77 HAVE_PG77 ${CMAKE_Fortran_COMPILER})
string(REGEX MATCH g77 HAVE_G77 ${CMAKE_Fortran_COMPILER})
string(REGEX MATCH ifort HAVE_ifORT ${CMAKE_Fortran_COMPILER})
string(REGEX MATCH f77 HAVE_F77 ${CMAKE_Fortran_COMPILER})
if(HAVE_GFORTRAN)
  set(F_LIBRARY gfortran CACHE string "fortran library")
  find_library(F_LIBRARY NAMES gfortran)
  set(FORTRAN_UNDERSCORE end CACHE string "What type of fortran underscore style - linux,end,none")
  set(DEF_FORTRAN_UNDERSCORE "#define FORTRAN_UNDERSCORE_END")
elseif(HAVE_XLF)
  set(F_LIBRARY xlf90 CACHE string "fortran library")
  find_library(F_LIBRARY NAMES xlf90)
  set(FORTRAN_UNDERSCORE none CACHE string "What type of fortran underscore style - linux,end,none")
  set(DEF_FORTRAN_UNDERSCORE "#define FORTRAN_UNDERSCORE_NONE")
elseif(HAVE_PGF77)
  set(F_LIBRARY pgftnrtl CACHE string "fortran library")
  find_library(F_LIBRARY NAMES pgftnrtl)
  set(FORTRAN_UNDERSCORE end CACHE string "What type of fortran underscore style - linux,end,none")
  set(DEF_FORTRAN_UNDERSCORE "#define FORTRAN_UNDERSCORE_END")
elseif(HAVE_G77)
  set(F_LIBRARY g2c CACHE string "fortran library")
  find_library(F_LIBRARY NAMES g2c)
  set(FORTRAN_UNDERSCORE linux CACHE string "What type of fortran underscore style - linux,end,none")
  set(DEF_FORTRAN_UNDERSCORE "#define FORTRAN_UNDERSCORE_LINUX")
elseif(HAVE_ifort)
  set(F_LIBRARY ifcore CACHE string "fortran library")
  find_library(F_LIBRARY NAMES ifcore)
  set(FORTRAN_UNDERSCORE end CACHE string "What type of fortran underscore style - linux,end,none")
  set(DEF_FORTRAN_UNDERSCORE "#define FORTRAN_UNDERSCORE_END")
elseif(HAVE_F77)
  set(FORTRAN_UNDERSCORE end CACHE string "What type of fortran underscore style - linux,end,none")
  set(FORTRAN_LIBRARY "" CACHE string "fortran library")
  set(DEF_FORTRAN_UNDERSCORE "#define FORTRAN_UNDERSCORE_END")
endif()
# f77 on redstorm currently an exception - doesn't need it 
if(NOT F_LIBRARY AND NOT HAVE_F77)
  message(FATAL_ERROR "Cannot find fortran library")
endif(NOT F_LIBRARY AND NOT HAVE_F77)

终端输出说，当我尝试cmake:

时抛出了一个错误。
message(FATAL_ERROR "Cannot find fortran library")

请让我知道如果我需要张贴任何更多的信息。提前感谢!

为了不留下问题:

变量CMAKE_Fortran_COMPILER必须设置为编译器可执行文件(gfortran)的名称，如果cmake不能自动确定它

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