makefile

问题 I am trying to write a C++ file in Android Studio and I would like to use OpenCV in my project. However, when I try to use the following includes, I get an error saying Cannot Find 'opencv2' . #include <opencv2/core.hpp> #include <opencv2/imgproc.hpp> #include <opencv2/features2d.hpp> To set up OpenCV in Android, you have to take the following steps, found here, to use the Java part of OpenCV in Android Studio. To the best of my knowledge to use the C++ part of OpenCV in Android Studio, you

问题 I am trying to write a C++ file in Android Studio and I would like to use OpenCV in my project. However, when I try to use the following includes, I get an error saying Cannot Find 'opencv2' . #include <opencv2/core.hpp> #include <opencv2/imgproc.hpp> #include <opencv2/features2d.hpp> To set up OpenCV in Android, you have to take the following steps, found here, to use the Java part of OpenCV in Android Studio. To the best of my knowledge to use the C++ part of OpenCV in Android Studio, you

问题 I am porting code that compiled on Ubuntu 14.04 to 16.04 . I have cloned my git repo, installed dependencies and tried the usual make command, soon I hit a g++: internal compiler error: Segmentation fault (program cc1plus) ... yet I am not sure where to start to diagnose and resolve this issue. I will share as much as I can, see if someone can guide me through a resolution. Ubuntu $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.2 LTS Release: 16

问题 I am writing python scripts and execute them in a Makefile. The python script is used to process data in a pipeline. I would like Makefile to execute the script every time I make a change to my python scripts. Does anyone have an idea of how to do this? 回答1: That's not a lot of information, so this answer is a bit vague. The basic principle of Makefiles is to list dependencies for each target; in this case, your target (let's call it foo) depends on your python script (let's call it do-foo.py

问题 I am writing python scripts and execute them in a Makefile. The python script is used to process data in a pipeline. I would like Makefile to execute the script every time I make a change to my python scripts. Does anyone have an idea of how to do this? 回答1: That's not a lot of information, so this answer is a bit vague. The basic principle of Makefiles is to list dependencies for each target; in this case, your target (let's call it foo) depends on your python script (let's call it do-foo.py

问题 I am writing python scripts and execute them in a Makefile. The python script is used to process data in a pipeline. I would like Makefile to execute the script every time I make a change to my python scripts. Does anyone have an idea of how to do this? 回答1: That's not a lot of information, so this answer is a bit vague. The basic principle of Makefiles is to list dependencies for each target; in this case, your target (let's call it foo) depends on your python script (let's call it do-foo.py

问题 I've been working on a c++ project for a while now, but would like to port it over to my arm processor. I already have all of my cross-compile tools (I'm using CodeSourcery) and thought I could just change my makefile to point to that compiler. It compiles fine using the default g++, but When try a make pointing to the cross-compiler I get relocation errors: /home/oryan/CodeSourcery/bin/../lib/gcc/arm-none-linux-gnueabi/4.5.2/../../../../arm-none-linux-gnueabi/bin/ld: ServerSocket.o:

问题 I can set number of threads for the build process using -j argument. For example, I have 4 cores +4 virtual. When I write: make -j8 the speed increases 4 times. Is it possible to set that value as default? (For example, in Linux Gentoo, in config file, it's possible to set this default value). p.s. I have Arch Linux 回答1: Your question is not about threads, but processes (jobs) executed by make. The simple, way to set this, when make is used from the console is adding: alias make="/usr/bin

问题 I can set number of threads for the build process using -j argument. For example, I have 4 cores +4 virtual. When I write: make -j8 the speed increases 4 times. Is it possible to set that value as default? (For example, in Linux Gentoo, in config file, it's possible to set this default value). p.s. I have Arch Linux 回答1: Your question is not about threads, but processes (jobs) executed by make. The simple, way to set this, when make is used from the console is adding: alias make="/usr/bin

问题 This is my first Makefile, and I can't figure out some of the syntax used. The questions are marked below: C := gcc CFLAGS := -Wall -Werror -std= PROG := program_1\ program_2\ program_3 SRCS := program_1.c \ program_2.c \ program_3.c OBJS := ${SRCS:.c=.o} all: ${OBJS} ${CC} ${OBJS} -o ${PROG} clean: rm -f ${PROG} ${OBJS} .c.o: ${CC} ${CFLAGS} -c $< What does .c=.o mean? in OBJS := ${SRCS:.c=.o} Not sure what $< means here, and .c.o ? .c.o: ${CC} ${CFLAGS} -c $< 回答1: First of all, your