CMake: use a custom linker
I want to setup a custom toolchain with cmake. I've set the compiler but I don't know how to set the linker. This error is reported because cmake try to use the compiler to link:The C compiler...
View ArticleHow to compile many projects in one makefile
Simple question but I couldn't find any full answer online.I have 3 projects, my desire outcome is that I run make and all 3 programs are transformed into executable files.gcc -o server server.cgcc -o...
View ArticleIs lazy binding really the default for ld?
man ld has the following to say about -z lazy:...tell the dynamic linker to defer function call resolution to the point when the function is called ... Lazy binding is the default.On the other hand,...
View ArticleDockerfile build distutils.errors.DistutilsExecError: command 'gcc' failed...
Using docker to test and develop an ETL data pipeline with Airflow and AWS glue. I'm currently using this blog post as a guide to launch the containers:...
View ArticleConfusion about virtual address space and position indepedent code (PIC)
While reading this blogpost, I came across the following while the author tries to justify the need of PIC for shared libraries.If your shared library is built to only work when loaded at one...
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Wrong .rodata address offset , memory corrupted , linker being naughty
I'm programming my kernel (32 bits x86) , and I am cursed with a problem I can't see how to solve.It's the first time I am confronted with such an issue , usually , I program in user space , so , here...
View ArticleLink against bionic libc on ARM executable
I have a simple Hello World C program:#include <stdio.h>int main() { printf("Hello World!"); return 0;}And I am able to cross-compile it for my Android smartphone using the following...
View ArticleI have made recurrence relation which finds the longest contiguous common...
int lcs(int i, int j, int count) { if (i == 0 || j == 0) return count; if (X[i-1] == Y[j-1]) { count = lcs(i - 1, j - 1, count + 1); } count = max(count, max(lcs( i, j - 1, 0), lcs( i - 1, j, 0)));...
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String doesn't display to console. Wrong .rodata address offset? Memory...
I'm programming my kernel (32 bits x86), and I am cursed with a problem I can't see how to solve.It's the first time I am confronted with such an issue, usually, I program in user space, so, here it...
View ArticleGCC section attribute on function implementation
Can I use __attribute__((section("name"))) on a function implementation like this:int __attribute__((section("name"))) Foo( void ){ return 1;}This works on arm compiler, see this link...
View ArticleGCC x64 on Windows
I tried installing CygWin64, but I cannot find any executables to build my code with in the C:\cygwin64 directory created.I tried Win-Builds but the setup doesn't load with any mirror I give it. It...
View Article__attribute__((io)), __attribute__((address)) in gcc for AVR don't seem to...
I am trying to use variable attributes specifically provided by AVR flavor of gcc (https://gcc.gnu.org/onlinedocs/gcc/AVR-Variable-Attributes.html#AVR-Variable-Attributes).The manual says that these...
View ArticleHow to create a executable hex from elf file format
I am very very new to this, I have elf file input.out and need to create hex executable from it. I am using objcopy to create executable in intel hex format as followsobjcopy -O ihex input.out...
View Articleerror: unsupported size for integer register
I'm using i686 gcc on windows. When I built the code with separate asm statements, it worked. However, when I try to combine it into one statement, it doesn't build and gives me a error: unsupported...
View ArticleAssembly: Unable to read sectors after the first track
As part of my operating system I wrote this read sector function.It takes a sector address to read from a BIOS device id. But when I set to read from sector 19 (Head: 0, Track: 1, Sector 2) the result...
View Articlehow to use gcc to compile .asm file?
I have some .asm files that use the Intel Assembly format, but I want to compile them by using GCC. Does anyone know how to do this in GCC? I know NASM and YASM are options for this question, but can...
View Articleerror: conflicting types for ‘recdisp’ void recdisp(struct node* p)
void recdisp(struct node* p);struct node{int data;struct node* link;};struct node* head;int main(){recdisp(head);return 0;}void recdisp(struct node* p){if(p==NULL)return; recdisp(p->link);printf("%d...
View ArticleUsing gcc on multiple file objects
In an exam I took I found myself in front of this question:What's the result following this command?gcc file1.o file2.o file3.oA)Nothing, it's using the wrong syntaxB)Links the file objects but won't...
View ArticleHow to trace specific functions/files in C?
I have already known that the GCC's argument -finstrument-functions can hook the functions and the argument -finstrument-functions-exclude-file(functions)-list can exclude some files/functions to be...
View ArticleHow to update GCC in MinGW on Windows?
I'm used to manually install GCC from source before on Ubuntu and it was a painful process. So I really don't want to do repeat this process. Currently, I have MinGW and GCC (4.6.2) installed on my...
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