That message isn’t actually an error – it’s just a warning that the file in question isn’t of the right architecture (e.g. 32-bit vs 64-bit, wrong CPU architecture). The linker will keep looking for a library of the right type. Of course, if you’re also getting an error along the lines of can’t find lPI-Http … Read more
Refer to the specifications. Here’s a basic implementation: public static MachineType GetDllMachineType (string dllPath) { // See http://www.microsoft.com/whdc/system/platform/firmware/PECOFF.mspx // Offset to PE header is always at 0x3C. // The PE header starts with “PE\0\0” = 0x50 0x45 0x00 0x00, // followed by a 2-byte machine type field (see the document above for the enum). // … Read more
The JVM architecture in use can be retrieved using the “os.arch” property: System.getProperty(“os.arch”); The “os” part seems to be a bit of a misnomer, or perhaps the original designers did not expect JVMs to be running on architectures they weren’t written for. Return values seem to be inconsistent. The NetBeans Installer team are tackling the … Read more
Running Kubuntu 13.10 (x64) and I used lib32z1, which fixed it for me. sudo apt-get install lib32z1
which factors influence performance of these operations? Probably the compiler and compiler version; but does the operating system or the CPU make/model influence this as well? Mostly the processor architecture (and model – please read model where I mention processor architecture in this section). The compiler may have some influence, but most compilers do pretty … Read more
I’m not sure if it’s the best choice, but here is a hash function for strings: The Practice of Programming (HASH TABLES, pg. 57) /* hash: compute hash value of string */ unsigned int hash(char *str) { unsigned int h; unsigned char *p; h = 0; for (p = (unsigned char*)str; *p != ‘\0’; p++) … Read more
All calculations take place in the registers. When you’re adding (or subtracting, or whatever) variables together in your code, they get loaded from memory into the registers (if they’re not already there, but while you can declare an infinite number of variables, the number of registers is limited). So, having larger registers allows you to … Read more
follow http://support.microsoft.com/kb/896456 To start a 32-bit command prompt, follow these steps: * Click Start, click Run, type %windir%\SysWoW64\cmd.exe, and then click OK. Then type cscript vbscriptfile.vbs
This is known to work on Ubuntu 16.04 through 22.04: sudo apt install gcc-multilib g++-multilib Then a minimal hello world: main.c #include <stdio.h> int main(void) { puts(“hello world”); return 0; } compiles without warning with: gcc -m32 -ggdb3 -O0 -pedantic-errors -std=c89 \ -Wall -Wextra -pedantic -o main.out main.c And ./main.out outputs: hello world And: file … Read more
Negating an (unsuffixed) integer constant: The expression -(-2147483648) is perfectly defined in C, however it may be not obvious why it is this way. When you write -2147483648, it is formed as unary minus operator applied to integer constant. If 2147483648 can’t be expressed as int, then it s is represented as long or long … Read more