I have a cmake project that uses a header installed in /usr/include
, let's call it freeglut.h
. When I use find_package(GLUT)
I get ${GLUT_INCLUDE_DIR}
pointing to /usr/include
. All's well.
我有一个cmake项目,它使用安装在/usr/include中的header,我们称它为freeglut.h。当我使用find_package(供过于求)时,我得到${GLUT_INCLUDE_DIR}指向/usr/ include_dir)。终成眷属。
Now, I'm adding CUDA, which keeps its own copies of these and other headers in one of the paths included with find_package(CUDA)
. Normally I would resolve this by placing ${GLUT_INCLUDE_DIR}
before ${CUDA_INCLUDE_DIRS}
in include_directories()
. However, on Unix systems cmake, in UnixPaths.cmake
, maintains a list
called CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES
, which contains /usr/include
and apparently keeps cmake from emitting -I<dir>
arguments for the compiler for the directory /usr/include
, meaning that the compiler searches the CUDA path first, and uses the freeglut.h
header found there.
现在,我添加CUDA,它在find_package(CUDA)包含的路径中保留自己的这些和其他头部的副本。通常,我将${GLUT_INCLUDE_DIR}放在${CUDA_INCLUDE_DIRS}中的include_directory()中来解决这个问题。但是,在Unix系统cmake中,在UnixPaths中。cmake维护一个名为cmake_cxx_implicit_include_directory的列表,该列表包含/usr/include,并且很明显地防止cmake为目录/usr/include的编译器发出-I
I have tried using list(REMOVE_ITEM ...
to remove /usr/include
from the CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES
list, but that didn't change the compiler commands that cmake made.
我试过使用list(REMOVE_ITEM…)从cmake_cxx_implicit_include_directory列表中删除/usr/include,但这并没有改变cmake所生成的编译器命令。
I could of course start hacking around with the CUDA installation, delete the headers I don't want, or modify the CUDA_INCLUDE_DIRS
variable, but is there a clean way to tell cmake to use the system header files first, if they exist?
我当然可以开始使用CUDA安装,删除我不想要的头文件,或者修改CUDA_INCLUDE_DIRS变量,但是是否有一种干净的方法可以让cmake首先使用系统头文件,如果它们存在的话?
1 个解决方案
#1
3
I suppose the -idirafter
flag should help you:
我想-idirafter旗帜应该对您有所帮助:
-idirafter dir
-idirafter dir
Search dir for header files, but do it after all directories specified with -I and the standard system directories have been exhausted. dir is treated as a system include directory.
为头文件搜索dir,但在使用-I和标准系统目录指定的所有目录都已耗尽之后再执行。dir被视为系统包含目录。
https://gcc.gnu.org/onlinedocs/gcc/Preprocessor-Options.html
https://gcc.gnu.org/onlinedocs/gcc/Preprocessor-Options.html
You can use it like this to lower CUDA include dirs priority:
你可以用它来降低CUDA包含dirs优先级:
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -idirafter /usr/include/<CUDA_includes>")
#1
3
I suppose the -idirafter
flag should help you:
我想-idirafter旗帜应该对您有所帮助:
-idirafter dir
-idirafter dir
Search dir for header files, but do it after all directories specified with -I and the standard system directories have been exhausted. dir is treated as a system include directory.
为头文件搜索dir,但在使用-I和标准系统目录指定的所有目录都已耗尽之后再执行。dir被视为系统包含目录。
https://gcc.gnu.org/onlinedocs/gcc/Preprocessor-Options.html
https://gcc.gnu.org/onlinedocs/gcc/Preprocessor-Options.html
You can use it like this to lower CUDA include dirs priority:
你可以用它来降低CUDA包含dirs优先级:
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -idirafter /usr/include/<CUDA_includes>")