The following code is perfect valid, int *ia = (int[]){1,3,5,7}; but when I compile the next line of code, char *p = (char[]) "abc"; gcc says test.c:87: error: cast specifies array type It seems they are casted in the same way. Why did the second one get an err msg? As you guys said, "abc" is a pointer, which cannot be conver...
Hi all, I tried to compile sigintr.c in DD-WRT/src/router/rflow with arm-linux-gcc. The problem I encountered is: sigintr.o: In function siginterrupt': sigintr.c:(.text+0x88): undefined reference to_sigintr' collect2: ld returned 1 exit status make[1]: * [rflow] Error 1 I can find '_sigintr' in libc.so, but unfortunately...
In fact, -static gcc flag on Linux doesn't work now. Let me cite from the GNU libc FAQ: 2.22. Even statically linked programs need some shared libraries which is not acceptable for me. What can I do? {AJ} NSS (for details just type `info libc "Name Service Switch"') won't work properly without shared libraries. NSS al...
I'm experimenting with gcov using mingw gcc 4.4.0. I've been getting some interesting but strange results. A common pattern is something like this... 5162: 66: std::string::iterator i = l_Temp.begin (); 5162: 67: std::string::iterator j = l_Temp.end () - 1; -: 68: char ch; -: 69: 20564: 70: wh...
I'm using GCC with the -fomit-frame-pointer and -O2 options. When I looked through the assembly code it generated, push %ebp movl %esp, %ebp at the start and pop %ebp at the end is removed. But some redundant subl/addl instructions to esp is left in - subl $12, %esp at the start and addl $12, %esp at the end. How will I be able to re...
Hello, I am trying to port NewLib for my OS (I am following this tutorial: http://wiki.osdev.org/Porting_Newlib), and I have some questions. Once LibGloss is done and compiled, when exactly I'll have to use the libnosys.a that have been created? Is it when I will compile my main.c? > mipsel-uknown-elf-gcc main.c -Llibnosys.a M...
Hello, I was wondering if there is a way of finding which function called the current function (at runtime) in C. I know you could use __FUNCTION__ in gcc, but is there a way without using the C preprocessor? Probably not. Cheers ...
I observed that there was at some point a <? and >? operator in GCC. How can I use these under GCC 4.5? Have they been removed, and if so, when? Offset block_count = (cpfs->geo.block_size - block_offset) <? count; cpfs.c:473: error: expected expression before ‘?’ token ...
Hello. If I have the following code in Windows VC++: DWORD somevar = 0x12345678; _asm call dword ptr [somevar] How can I make the same thing in GCC inline-assembly, with AT&T syntax? __asm__ __volatile__ ( "call dword ptr [%%edx]" : : "d" (somevar) ); I've tried something like this, but it generates an "junk" error... And ...
I need to compile a standalone .a or .so library in Ubuntu 10.04 from the FFTW source code. I find that the directory layout of the source distribution is so complex that I have no idea where to start. I need to use an older version of gcc as well. ...
Can anyone tell me, why in the blazes GCC (e.g. 4.4.3) does not warn about or error the incorrect call of a nullary function? void hello() { } int main( int argc, char* argv[] ) { int test = 1234; hello(test); return 0; } (see also http://bytes.com/topic/c/answers/893146-gcc-doesnt-warn-about-calling-nullary-function-parameters) ...
This is what I get when trying to compile a simple hello world program with gcc. c:\>gcc hello.c hello.c:9:2: warning: no newline at end of file C:\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\mingw32\bin\ld.exe: cannot open output file a.exe : Permission denied collect2: ld returned 1 exit status Does it have something to do with w...
When compiling Objective-C from the command line (gcc), what are some good flags to use? Many of the standard C flags (-Wall, -ansi, etc) don't play well with Objective-C. I currently just use -lobjc and -frameworkwith various frameworks. ...
Is the way C++ structs are laid out set by the standard, or at least common across compilers? I have a struct where one of its members needs to be aligned on 16 byte boundaries, and this would be easier if I can guarantee the ordering of the fields. Also, for non-virtual classes, is the address of the first element also likely to be th...
Hello, Is there any way to get current function name in C++? I want to track some functions calls order. Is there something like __FILE__ or __LINE__? Thank you! ...
When I try to use boost on an old Linux system, I get the message: Compiler not configured - please reconfigure The version of my gcc is: gcc version 2.9-gnupro-99r1 And in boost's gcc.hpp file I see: // versions check: // we don't know gcc prior to version 2.90: #if (__GNUC__ == 2) && (__GNUC_MINOR__ < 90) # error "Compile...
I have followed the instructions at Cross linux from scratch for powerpc, but I can't get past the gcc-final stage due to an ld error crti.o: no such file or directory. My tool chain is separated into two directories: /opt/builder/tools and /opt/builder/cross-tools, with Linux headers and eglibc in the first and cross-utilities in the ...
Hi, I have created a .c file which is being converted to a .o file along with around 300 other .c files and included in a .a static library. This library, along with many others is being used to create a .so dynamic library. On analyzing both the .a and the .so file with nm, I found that for some reason the symbols defined in the .c fil...
I'm fiddling around with the C/C++ version of Eclipse to build a simple GTK app. However, I can't seem to be able to compile a GTK sample from within Eclipse. I think gtk is installed properly, used the ubuntu Package manager. the code is: #include <gtk-2.0/gtk/gtk.h> int main( int argc, char *argv[] ) { GtkWidget *window; g...
I have a file named gcc.exe and I have a php page... I want to use: gcc test.c And, if there's some compilation error, I want to show it on the php page... But I can't. What happens is: If the file is correct, it generates the .exe file, but if it's wrong, nothing happens. What I want here, again, is to show all errors. Anyone has an...