in some cases the linker allows multiple modules to define global symbols with the same name?
来源： https://stackoverflow.com/questions/63642665/in-some-cases-the-linker-allows-multiple-modules-to-define-global-symbols-with-t
gnu
Is it possible to override main method using LD_PRELOAD?
问题 This is mostly out of curiosity. I understand that definitions for library functions can be replaced (?) if I LD_PRELOAD my own library with my own definition for the library function. Can I do the same for the main method of an executable? That is, without rebuilding the executable, can I do something to the runtime so that a different main() is called? 回答1: No, you cannot use LD_PRELOAD to override the main function of a binary. LD_PRELOAD A whitespace-separated list of additional, user
Linux randomly deleted my file while compiling what do I do?
问题 gcc -L/root/Desktop - Wall -o prog3.c -pthread -lcopy /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/Scrt1.0: In function '_start': (.text+0x20): undefined reference to 'main' collect2: error: ld returned 1 exit status This is my error code. prog3.c is nowhere to be found, what on earth happened is there any way to get my file back?? The bold is the command I ran and the rest is the resultant console output 回答1: Your problem is here: -o prog3.c . gcc ’s -o option is used to tell
Linux randomly deleted my file while compiling what do I do?
问题 gcc -L/root/Desktop - Wall -o prog3.c -pthread -lcopy /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/Scrt1.0: In function '_start': (.text+0x20): undefined reference to 'main' collect2: error: ld returned 1 exit status This is my error code. prog3.c is nowhere to be found, what on earth happened is there any way to get my file back?? The bold is the command I ran and the rest is the resultant console output 回答1: Your problem is here: -o prog3.c . gcc ’s -o option is used to tell
Is there a nice way of handling multi-line input with GNU readline?
问题 My application has a command line interface, and I'm thinking about using the GNU Readline library to provide history, an editable command line, etc. The hitch is that my commands can be quite long and complex (think SQL) and I'd like to allow users to spread commands over multiple lines to make them more readable in the history. Is it possible to do this in readline (maybe by specifying a difference between a newline and an end of command)? Or would I be better off implementing my own
gnu linker section of non-contiguous memory region
问题 I'm trying to write a linker script to write one section content into two non-contiguous memory regions. I have found an old thread in this mail list about this: "ld linker script and non-contiguous memory region" http://sourceware.org/ml/binutils/2012-01/msg00188.html I know a feature from the C28x Compiler for this problem is spliting the sections across multiple memory segments: (with an or function) SECTIONS { .text: { *(.text) } >> FLASH1| FLASH3 } described here: http://processors.wiki
Makefile executes the same recipe twice when using multiple jobs
问题 I'm looking at the following toy Makefile to track a bug: all: hey bye hey bye: hi cat hi touch hey bye In this scenario, I've created the hi file beforehand. I then run make -j 2 all and get the following output: cat hi cat hi hey touch hey bye hey touch hey bye Whereas if I run it with make -j 1 all , the commands get executed only once. The debug output is pretty verbose, but from what I understand, it's executing it twice because it tried to satisfy hey and bye with two different jobs.
Where is gnu lib math (libm) source code
问题 I want to download and compile the source code for libm (GNU's may library). Can someone point me to the correct location / repository? 回答1: It is contained in the C standard lib: Glibc 来源： https://stackoverflow.com/questions/11550140/where-is-gnu-lib-math-libm-source-code
开放源代码GIS资源集锦
转自 http://www.opensourcegis.org/ ，供不能访问该网址的朋友参考 ------------------------------------------------------- 3map " The planet-earth project is powered by 3map, a Free Software project being built with the support of the Telstra Broadband Fund that provides the client and server capabilities to deliver the Web Augmented Virtual Earth." [ License: ? ] Amein! Main site in German. English version on Directions site. "After the huge success of AveiN! we now also released an interface between ArcMap© and the UMN Mapserver. AmeiN! is integrated as extension into the GUI of ArcMap©. It writes UMN
What does the semicolon do when it is run in a bash command?
问题 For example, when running echo a; echo b in the terminal, its output is: a b It seems to me that the semicolon waits for the first command ( echo a ) to finish, then it starts the second command ( echo b ). Q: Is the semicolon just used for iterating over commands in bash? Q: What does the semicolon do when it is run in a bash command? 回答1: The ; separates the two commands. echo a; echo b It lets the bash know that echo a and echo b are two separate commands and need to be run separately one