I am writing a gui wrapper for gcc for a jailbroken iphone, etc. and it is almost done. However, I get this output when it is run ld: can't open output file for writing : a.out, errno=1 collect2:ld return 1 exit status. I believe this has to do with the privelages the app runs with. I have tried the setuid trick in the cydia developer fa...
Hello, I am getting this error whenever I try to run GCC outside of it's installation directory (E:\MinGW\bin). So, lets say I am in E:\code and have a file called one.c. Running: gcc one.c -o one.exe will give me this error: gcc: CreateProcess: No such file or directory The only workaround is to navigate to it's installation direc...
GCC complains if i do this: #define M(obj,met, ..., contents) obj##_##met(const void * self, __VA_ARGS__) { \ contents \ } Giving me these 2 reasons: error: missing ')' in macro parameter list warning: __VA_ARGS__ can only appear in the expansion of a C99 variadic macro Apparently, C99 - style variadic macros expect the clos...
We had just migrated our software to CentOS 5 platform, from RedHat 9. We're now compiling our C programs on CentOS 5 using gcc v4.1.2 and everything works fine on CentOS, but these new binaries will not run on RedHat 9 anymore (kernel 2.4.1). Any suggestions on how we can compile a binary that can run on both of these platforms? ...
I'm having a real strange problem using GCC for ARM with the optimizations turned on. Compiling my C++ application without the optimizations produces an executable that at runtime outputs the expected results. As soon as I turn on the optimizations - that is -O1 - my application fails to produce the expected results. I tried for a cou...
Hmm... Title is a bit of a mouthful, but I'm really not sure which part of this is causing issues, I've run through it a ton of times, and can't pinpoint why... The idea is for a single Choice instance to be able to store any one value of any of the types passed in to it's template list... It's kind of like a union, except it keeps trac...
Under Linux, C++, and GCC, can I get a physical address for a given virtual address? I know I won't be able to manipulate the physical address as a physical address. ...
I am trying to run a program compiled from C code from an unknown source. I want to make sure that the program does not harm my system in anyway. Like for instance, the program might have soemthing like system("rm -rf /") in the source, which is un-detectable, unless the code is thoroughly examined. I thought of the following 2 ways ...
I have written some code in C++ with a corresponding C interface (i.e C-function wrappers around the classes) that a friend wants to use in an iPhone application. Since I heard you can compile C++ for the plattform, but not use the iPhone sdk at the same time (sic) I thought that compiling all the code into a static library that my frie...
I'm trying to forward declare a class with the _may_alias attribute, but GCC gives an error when I attempt to do so: struct __attribute__((__may_alias__)) MyType; MyType* foo(); typedef struct __attribute__((__may_alias__)) MyType { ... } MyType; MyType* foo() {} Gives the error: testc.c:4: error: redefinition of typedef ‘A’ ...
I have four arrays of data (3072 bytes each.) I want to point to one of these arrays, so if a function were passed a pointer to these arrays, it could manipulate them, and the pointers could be s So initially I thought of pointers-to-pointers: uint16_t *buffer0_level[BUFF_WORDS] FAR; uint16_t *buffer0_mask[BUFF_WORDS] FAR; uint16_t *bu...
When using va_start(), va_arg() and va_end() to read parameters passed to a method, is there a way to count how many arguments there are? According to the man page if you call va_arg() too many times you get "random errors": If there is no next argument, or if type is not compatible with the type of the actual next argument (as ...
In GCC, I'm able to do this: (CachedPath){ino} inode->data = (struct Data)DATA_INIT; where: struct CachedPath { Ino ino; }; typedef int8_t Depth; struct Data { Offset size; Blkno root; Depth depth; }; #define DATA_INIT {0, -1, 0} MSVC gives the following error for these kind of casts: error C2143: syntax error : m...
I have an application which links to a number of libraries, most of them are available as both static as well as dynamic library on my machine. Below is the output of the ldd command. linux-gate.so.1 => (0xffffe000) libssl.so.0.9.8 => /usr/lib/libssl.so.0.9.8 (0xb782c000) libc.so.6 => /lib/libc.so.6 (0xb76cc000) libcrypto.so.0.9.8 => /...
Hi, I am loading a DLL from an application and I want the DLL to be able to use a function implemented in the application. The definition of the function is put in a header and is included in the DLL. Can anyone tell me what I am doing wrong here or whether this can't be done? Thanks for any help. App: include <API.h> extern "C" in...
The following little program is very awkward using GCC version 4.2.1 (Apple Inc. build 5664) on a Mac. #include <stdio.h> int main(){ int x = 1 << 32; int y = 32; int z = 1 << y; printf("x:%d, z: %d\n", x, z); } The result is x:0, z: 1. Any idea why the values of x and z are different? Thanks a lot. ...
Context: I am not certain whether this is my problem or the problem of the server this is running on. I am trying to compile and run a small utility, to become a cron job, that uses the mysql libraries. The program compiles successfully with the following command, no errors or warnings: gcc my_program.c -o my_program -I /usr/include/mys...
Is it possible to run a compiled program on a shared hosting account?I dont think I have permission to run gcc, but I can compile it elsewhere and download it - would that work? ...
How do I forward declare FILE * in C? I normally do this using struct MyType;, but naturally this doesn't appear to be possible. If behaviour differs between C standards or compilers and with C++, this is also of interest. Update0 Why I want to do this aside: What I'm asking is how to forward declare a non-struct/"typedef'd struct" ty...
How can I enable for loop initialization when compiling in c89 or gnu89 mode using GCC and Clang? ...