c++在我的 makefile 中包含 eigen
这似乎是我的问题的正确答案，但是我认为这更像是我编写 makefile 的方式，因为我已经有了下面链接中描述的步骤（我知道如何构建东西）。
如何为使用 Eigen（线性代数的 C++ 模板库）的 C++ 项目编写 makefile？
错误：
SASAGeometry.h:6:22: error: Eigen/Core: No such file or directory
SASAGeometry.h:7:20: error: Eigen/LU: No such file or directory
我的头文件中有问题的行很简单：
#include <Eigen/Core>
#include <Eigen/LU>
所以这是 makefile（我知道 INCLUDE 行中的内容有点过分）：
CC = g++
BIN = .
INCLUDE = -I/usr/local/include/eigen2/ -I. -I/usr/local/include/eigen2/Eigen/ -I/home/mark/Applications/eigen/Eigen/src/ -I /usr/local/include
CFLAGS = -pipe
LFLAGS = -lm
GeomTest_OBJS = geomTest.o SASAGeometry.o
geomTest_source = SASAGeometry.cpp SASAGeometry.h sasa_transformMatrix.cpp sasa_transformMatrix.h geomSetup.cpp
geomTest : $(GeomTest_OBJS) makefile
$(CC) -o geomTest.o -o SASAGeometry.o $(LIBS) $(INCLUDE) $(CFLAGS) $(geomTest_source) $(LFLAGS)
$(CC) $(LIBS) $(INCLUDE) $(CFLAGS) -o $(BIN)/geomTest geomTest.o SASAGeometry.o $(LFLAGS)
clean : \rm *.o *~ p1
有什么想法吗？
提前致谢！
This seems to be the correct answer to my problem, however I think it's more the way I am writing my makefile as I already have the steps described in the link below (I know how to build things).
Error:
SASAGeometry.h:6:22: error: Eigen/Core: No such file or directory
SASAGeometry.h:7:20: error: Eigen/LU: No such file or directory
The problematic lines in my header file are simply :
#include <Eigen/Core>
#include <Eigen/LU>
So here is the makefile (am on overkill in the INCLUDE line, I know):
CC = g++
BIN = .
INCLUDE = -I/usr/local/include/eigen2/ -I. -I/usr/local/include/eigen2/Eigen/ -I/home/mark/Applications/eigen/Eigen/src/ -I /usr/local/include
CFLAGS = -pipe
LFLAGS = -lm
GeomTest_OBJS = geomTest.o SASAGeometry.o
geomTest_source = SASAGeometry.cpp SASAGeometry.h sasa_transformMatrix.cpp sasa_transformMatrix.h geomSetup.cpp
geomTest : $(GeomTest_OBJS) makefile
$(CC) -o geomTest.o -o SASAGeometry.o $(LIBS) $(INCLUDE) $(CFLAGS) $(geomTest_source) $(LFLAGS)
$(CC) $(LIBS) $(INCLUDE) $(CFLAGS) -o $(BIN)/geomTest geomTest.o SASAGeometry.o $(LFLAGS)
clean : \rm *.o *~ p1
any thoughts?
Thanks in advance!
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（注意，阅读评论以获取最终解决方案的要点。当我从问题的原始发布者那里得到澄清时，我会更新答案。）
有时这是显而易见的，很容易被忽略。请检查您的用户是否具有 /usr/local/include/eigen2 和 /usr/local/include/eigen2/Eigen 中所有文件和目录的读取权限。还要仔细检查您要包含的文件是否实际存在于 /usr/local/include/eigen2/Eigen 中。
额外的：
听起来安装是直接部署到 /usr/include/eigen2 中的，而不是像文档假设的那样部署到 /usr/include/Eigen 中。这意味着教程想要的头文件位于 /usr/include/eigen2 中。你的 -I 需要指向
/usr/include/（我认为这是 GNU GCC 中默认的）。您的源代码不正确，应该是#include和#include。在您的系统上安装 eigen 的人更改了文档中指定的根目录的名称。(Note, read comments to get gist of the final solution. I will update the answer when I have clarification from the original poster of the question.)
Sometimes it is the obvious, which is easy to miss. Please check that your user has read permissions for all files and directories in /usr/local/include/eigen2 and /usr/local/include/eigen2/Eigen. Also double check the files you are including actually exist in /usr/local/include/eigen2/Eigen.
Additional:
It sounds like the install was deployed directly into /usr/include/eigen2 and NOT /usr/include/Eigen like the documentation assumes. That means the header files the tutorials want are in /usr/include/eigen2. Your -I needs to point to
/usr/include/(I think thats by default in GNU GCC). Your source code is incorrect, it should be#include <eigen2/Core>and#include <eigen2/LU>. Whoever installed eigen on your system changed the name of the root directory specified in the documentations.您链接到的问题有正确答案。您只需要使用正确的
-I标志来指向 Eigen 标头。对于所有 Eigen 标头，您应该只需要一个-I。The question you link to has the correct answer. You just need to use the proper
-Iflag to point to the Eigen headers. You should only need one-Ifor all of the Eigen headers.