C++ version of system header files cannot be found [closed]
with "... after adding sqlite.c in project" I should continue, because every thing was fine. Headers like cassert, cerrno, cstdio, let say, c* do exist and normally compiler do see them and...
View ArticleExplicit iteration counter privatisation with OMP parallel for
I have a few questions about parallelisation using OMP.Say I have a program, within which there is a nested for loop. From my understanding of the directive #pragma omp parallel for, the outer...
View ArticleLFS 9.1, step 6.9 (glibc-2.31) , breaks gcc
I'm stuck os step 6.9 of LFS.After launching make, the following command breaks gcc functionalitycase $(uname -m) in i?86) ln -sfnv $PWD/elf/ld-linux.so.2 /lib ;; x86_64) ln -sfnv...
View ArticleIs there something similar to the -trimpath command in go that I can use...
I saw this post while searching around the forums: Remove file paths from TEXT directives in go binaries and that is my exact problem. However I'd rather not use go if I don't have to.Currently using...
View ArticleMinGW GCC compiler in Dymola seems to be unable to load external DLLs
I am working with Modelica models in the Modelica Buildings Library that call an external DLL containing C code. When using a Visual Studio compiler in Dymola, the models compile and simulate...
View ArticleAllowing struct field to overflow to the next field
Consider the following simple example:struct __attribute__ ((__packed__)) { int code[1]; int place_holder[100];} s;void test(int n){ int i; for (i = 0; i < n; i++) { s.code[i] = 1; }}The for-loop is...
View ArticleGCC cross compiler for DOS produces linker errors for simple "Hello world!" in C
I've tried to configure GCC 9.3.0 to produce executable files for DOS. However, for a simple "Hello world!" program in C, it...
View ArticleDoes a compiler always produce an assembly code?
From Thinking in C++ - Vol 1:In the second pass, the code generator walks through the parse tree and generates either assembly language code or machine code for the nodes of the tree.Well at least in...
View ArticleWhy is my C++ program's assembly output full of .ascii with no assembly code?
I am compiling a C++ file into a static library with CMake and I am modifying the Makefile that CMake generates by adding the -S -fverbose-asm flags to the gcc command to get the assembly output,...
View ArticleWhat is __libc_start_main and _start?
From the past few days I have been trying to understand what happens behind the curtain when we execute a C program. However even after reading numerous posts I cannot find a detailed and accurate...
View ArticleWhy is scanf() causing infinite loop in this code?
I've a small C-program which just reads numbers from stdin, one at each loop cycle. If the user inputs some NaN, an error should be printed to the console and the input prompt should return again. On...
View ArticleBuilding against ancient C Object
I have a project I'm working on that has code from 1988 and is on Solaris Sparc machines.I'm not a C programmer, but there is a header file and object file for the old code but no sourcecode.I can live...
View ArticleWhy does gcovr generate empty coverage statistics?
I'm confused about how to use gcov. I've got a cmake project that has two test executables which use googletest. I've added the required flags to my cmake script:set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}...
View ArticleExpected compiler error when sorting std::list with -fconcepts on gcc trunk?
First, the source:#include <list>#include <algorithm>using namespace std;int main(int argc, const char* argv[]) { list<int> l = {3,-1,10}; sort(begin(l), end(l)); return 0;}Following...
View ArticleVS Code task template for compiling/linking codes of multiple units
I have a multi-unit project that involves 1) compiling multiple .c, .cpp and .cu (CUDA) source code units and 2) linking those into a single executable. To show the overall building tasks, the cmake...
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Issue when debugging with gdb after compiling with the MSYS2 MinGW-w64 gcc...
I'm having this "issue" with gcc and gdb, which by itself isn't a real problem but it still annoys me and I want to understand why it's happening and how to solve it. First I want to apologize because...
View ArticleCompilation fails with "relocation R_X86_64_32 against `.rodata.str1.8' can...
I'm trying to compile this source code from the makefile in a VPS, but its not working. The VPS is a 64 Cent OSHere's the full error# makegcc -c -O3 -w -DLINUX -I../SDK/amx/ ../SDK/amx/*.cg++ -c -O3 -w...
View Article"sprintf" error in esp-idf. gcc version 9.1.0 in msys2
I was using msys2 earlier with gcc 6.4.0 and was working for my project. I upgraded the toolchain and gcc to 9.1.0. Now I am getting this error:small part of code: memset(payload, 0, 8192);...
View ArticlePop Push Using Arm GNU assembler
I am using TM4C123 evaluation board(cortex M4f Based) and trying to compile the project using different toolchains.GCC assembler generates an error for these instructions which I couldn't resolve or...
View ArticleWhy does clang handle exceptions for this trivial std::variant code?
If we have code like this:#include <variant>int main(){ using V = std::variant<int, double>; V a = 5; V b = 5.6; a.swap(b);}https://gcc.godbolt.org/z/oqGiHsIf you compile with clang, it...
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