Makefile only working with relative paths on MSYS2 (WIndows)

Question

I have a set of programs that compile fine on Ubuntu and I'm working on a setup to compile on Windows as well. I'm using MSYS2.

There is a main Makefile which looks like this:

#### Project main directory

DIR_MAIN=$(shell pwd)

#### Compile all

all:
    @$(MAKE) -C src/Misc DIR_MAIN=$(DIR_MAIN)
    @$(MAKE) -C src/CF_states DIR_MAIN=$(DIR_MAIN)

etcetera. In src/ there are folders each who contain a specific Makefile for that project. They have the following structure:

#### Directories and flags

ifndef $(DIR_MAIN)
  DIR_MAIN=../..
endif

DIR_EXE=$(DIR_MAIN)/Programs
DIR_SRC=$(DIR_MAIN)/src/Misc
DIR_SFMT_SRC=$(DIR_MAIN)/src/sfmt
DIR_BLD=$(DIR_MAIN)/build/Misc
COMP=g++

COMPILE_FLAGS= -std=c++11 -O3 -lstdc++ -msse2
LINK_FLAGS= -O3 -fopenmp -lgsl -lgslcblas -lm -lhdf5_cpp -lhdf5


#### Compile all

all: setup $(DIR_BLD)/input.o $(DIR_BLD)/misc_sphere.o $(DIR_BLD)/misc.o 

setup:
    @mkdir -p $(DIR_BLD)
    @mkdir -p $(DIR_EXE)

#### Misc source

$(DIR_BLD)/input.o: $(DIR_SRC)/input.cpp $(DIR_SRC)/input.h $(DIR_SRC)/misc_sphere.h
    ${COMP} -c input.cpp ${COMPILE_FLAGS} -o $@

$(DIR_BLD)/misc_sphere.o: $(DIR_SRC)/misc_sphere.cpp $(DIR_SRC)/misc_sphere.h $(DIR_SRC)/misc.h
    ${COMP} -c misc_sphere.cpp ${COMPILE_FLAGS} -o $@

$(DIR_BLD)/misc.o: $(DIR_SRC)/misc.cpp $(DIR_SRC)/misc.h
    ${COMP} -c misc.cpp ${COMPILE_FLAGS} -o $@

In this way the specific Makefiles can be run from their folder in src/, using relative paths, or from the main Makefile, using absolute paths.

这在Ubuntu上有效，但在MSYS2上只有相对路径有效，即从其文件夹中运行每个特定的Makefile。当我使用运行主Makefile时

mingw32-make.exe

我得到错误

$ mingw32-make.exe
mingw32-make[1]: Entering directory 'C:/msys64/home/Jorgen/fqhe_mc_sphere/src/Misc'
mingw32-make[1]: *** No rule to make target '/home/Jorgen/fqhe_mc_sphere/src/Misc/input.cpp', needed by '/home/Jorgen/fqhe_mc_sphere/build/Misc/input.o'.  Stop.
mingw32-make[1]: Leaving directory 'C:/msys64/home/Jorgen/fqhe_mc_sphere/src/Misc'
Makefile:8: recipe for target 'all' failed
mingw32-make: *** [all] Error 2

即使文件/home/Jorgen/fqhe_mc_sphere/src/Misc/input.cpp存在，也可以使用检查ls。知道为什么吗？

编辑：

将第一个目标更改为相对路径（结果除外），即

$(DIR_BLD)/input.o: input.cpp input.h misc_sphere.h
    ${COMP} -c input.cpp ${COMPILE_FLAGS} -o $@

输出对象文件出现类似错误：

Fatal error: can't create /home/Jorgen/fqhe_mc_sphere/build/Misc/input.o: No such file or directory

虽然该文件夹/home/Jorgen/fqhe_mc_sphere/build/Misc/确实存在。

我尝试以管理员身份运行MSYS2，但没有帮助。

Answer 1

您正在将POSIX路径与Windows路径混合并运行不了解POSIX路径的mingw32-make。

如user657267所建议，请使用make代替。否则，您可以使用mklink / D来制作技巧，以在Windows上创建与POSIX等效的路径。在这里，您应该最有可能将C：\ home链接到C：\ msys64 \ home。