Recent questions tagged gcc

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gcc - Does the order of -l and -L options in the GNU linker matter?

The -l option tells the linker to search the libraries in the standard dirs. And with -L, we can specify ... L will be given preference first? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - When __builtin_memcpy is replaced with libc's memcpy

There is a version of C99/posix memcpy function in GCC: __builtin_memcpy. Sometimes it can be replaced ... __builtin_memcpy over plain memcpy? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - Linker error on a C project using Eclipse

I want create a project for the STM32F217IG microcontroller. So I installed Eclipse and the GNU for ARM embedded ... the .elf file creation? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - Use -isystem instead of -I with CMake

Is there any way in CMake to force a path specified via include_directories (or perhaps through a different function) to ... on -I and -isystem. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - x86 spinlock using cmpxchg

I'm new to using gcc inline assembly, and was wondering if, on an x86 multi-core machine, a spinlock (without ... : lock mov 0 [lock_addr] ret See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - Make C floating point literals float (rather than double)

It is well known that in C, floating point literals (e.g. 1.23) have type double. As a consequence, any ... compiler is gcc, by the way. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - Ansible Installation -clang: error: unknown argument: '-mno-fused-madd'

So, I've found some other clang error's on here that appear to be somewhat similar, however, the fixes ... starting to get fairly frustrating. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - Macro to replace C++ operator new

Is it possible to create macros to replace all forms of operator new with overloads that include additional args.. ... obvious that I'm missing? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - How can I print stack trace for caught exceptions in C++ & code injection in C++

I want to have stack trace not for my exceptions only but also for any descendants of std::exception As I ... It can use c++0x features See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - What does __asm__ __volatile__ do in C?

I looked into some C code from http://www.mcs.anl.gov/~kazutomo/rdtsc.html They use stuff like ... /gcc.gnu.org/wiki/DontUseInlineAsm) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - Strange behaviour of macros C/C++

I'm using some macros, and observing some strange behaviour. I've defined PI as a constant, and then used it ... why I'm getting this behaviour? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - Why C standards allow you not to return a value from a function?

I have successfully compiled and executed the following code in gcc: #include <stdio.h> int foo() { } int main( ... conform to any C standard)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - clang (LLVM) inline assembly - multiple constraints with useless spills / reloads

clang / gcc : Some inline assembly operands can be satisfied with multiple constraints, e.g., "rm", when ... joining project discussions, etc. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - 'Reverse' a collection of C preprocessor macros easily

I have a lot of preprocessor macro definitions, like this: #define FOO 1 #define BAR 2 #define BAZ 3 In the real ... gcc 6.3 on Windows 10. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - MinGW 4.8.1 C++11 thread support

I downloaded the version of MinGW from the official website: http://sourceforge.net/projects/mingw/files/ and ... 'm getting this error. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - C++ uniform_int_distribution always returning min() on first invocation

In at least one implementation of the standard library, the first invocation of a std::uniform_int_distribution<> ... clearly non-random value? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - How to repair warning: missing braces around initializer?

The warning is produced by the c code generated by vala. warning: missing braces around initializer The code works but the ... a way to fix it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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468 views

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gcc - C++ handling of excess precision

I'm currently looking at code which does multi-precision floating-point arithmetic. To work correctly, that code ... I'm still curious. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - Undefined reference to `omp_get_max_threads_'

I'm getting the following errors trying to compile a project: (fortran, using gfortran) undefined reference to ` ... suppose to support OpenMP. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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632 views

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gcc - Hiding symbol names in library

I want to hide symbol names which are not relevant to the last user and make visible only APIs in my shared ... in list outputted by nm command. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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637 views

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gcc - Why would one use #include_next in a project?

To quote the iOS Documentation on Wrapper Headers: #include_next does not distinguish between <file> and "file" inclusion, ... need to use it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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754 views

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gcc - CMake and Static Linking

I'm using CMake in a project, and I'm trying to statically link some libraries. I've set: set(BUILD_SHARED_LIBS ... find much info on the net. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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545 views

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gcc - How to compile and run C in sublime text 3?

I would like to compile and run C program in sublime text 3 on ubuntu 14.04. Currently the program is being ... and run with a single command. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - How do I link object files in C? Fails with "Undefined symbols for architecture x86_64"

So I'm trying trying to use a function defined in another C (file1.c) file in my file (file2.c). I'm ... I have no clue what that means :( See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - Creating a C function without compiler generated prologue/epilogue & RET instruction?

Consider this function: void foo(){ //do something } In assembly it would look something like this (not ... Interrupt Service Routines (ISR). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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gcc - Errors that refer to a bunch of unresolved OpenSSL symbols that clearly exist?

I am building a shared library (we'll call it "foo") that makes use of another library (we'll call ... of OpenSSL symbols that clearly exist? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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718 views

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gcc - How to get value of variable defined in ld linker script from C

I am writing a program to run bare metal. I am trying to get a variable from a custom linker script ... variable defined in the linker script? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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706 views

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gcc - C code with undefined results, compiler generates invalid code (with -O3)

I know that when you do certain things in a C program, the results are undefined. However, the compiler ... generating a ud2 instruction... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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