Front page > Programming > How can I determine the CPU architecture for which my C/C++ code is being compiled?
How can I determine the CPU architecture for which my C/C++ code is being compiled?
Published on 2024-11-16
Browse:167
Compiling for a Specific CPU Architecture
When writing C or C code, it's often necessary to know the target CPU architecture for which you are compiling. This information can be useful for optimizing code performance or ensuring compatibility with specific hardware. Different compilers utilize various non-standard preprocessor definitions to distinguish CPU architectures (e.g., _M_X86 in MSVS, i386__, and __arm in GCC).
Standard Detection Methods
Unfortunately, there is no universal standard for detecting CPU architecture at compile time. However, the following external function can detect the architecture for a wide range of compilers:
extern "C" {
const char *getBuild() {
#if defined(__x86_64__) || defined(_M_X64)
return "x86_64";
#elif defined(i386) || defined(__i386__) || defined(__i386) || defined(_M_IX86)
return "x86_32";
#elif defined(__ARM_ARCH_2__)
return "ARM2";
#elif defined(__ARM_ARCH_3__) || defined(__ARM_ARCH_3M__)
return "ARM3";
#elif defined(__ARM_ARCH_4T__) || defined(__TARGET_ARM_4T)
return "ARM4T";
#elif defined(__ARM_ARCH_5_) || defined(__ARM_ARCH_5E_)
return "ARM5"
#elif defined(__ARM_ARCH_6T2_) || defined(__ARM_ARCH_6T2_)
return "ARM6T2";
#elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__)
return "ARM6";
#elif defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__)
return "ARM7";
#elif defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__)
return "ARM7A";
#elif defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__)
return "ARM7R";
#elif defined(__ARM_ARCH_7M__)
return "ARM7M";
#elif defined(__ARM_ARCH_7S__)
return "ARM7S";
#elif defined(__aarch64__) || defined(_M_ARM64)
return "ARM64";
#elif defined(mips) || defined(__mips__) || defined(__mips)
return "MIPS";
#elif defined(__sh__)
return "SUPERH";
#elif defined(__powerpc) || defined(__powerpc__) || defined(__powerpc64__) || defined(__POWERPC__) || defined(__ppc__) || defined(__PPC__) || defined(_ARCH_PPC)
return "POWERPC";
#elif defined(__PPC64__) || defined(__ppc64__) || defined(_ARCH_PPC64)
return "POWERPC64";
#elif defined(__sparc__) || defined(__sparc)
return "SPARC";
#elif defined(__m68k__)
return "M68K";
#else
return "UNKNOWN";
#endif
}
}
Latest tutorial
More>
-
Why Are My Bootstrap 4 Columns Vertically Aligned Instead of Horizontally?Bootstrap 4 Column Alignment InconsistenciesIn the transition from Bootstrap 3 to 4, you've noticed that your columns are vertically aligned inste...Programming Published on 2024-11-16 -
How to Determine If a Generator is Empty in PythonDetermining the Emptiness of a GeneratorIn Python, generators are a powerful tool for lazy evaluation and iterating over large datasets. However, dete...Programming Published on 2024-11-16
-
How to Merge Multiple DataFrames Based on a Common Column and Preserve Shared Rows?Merging Multiple Dataframes Based on a Common ColumnYou have multiple dataframes with a common column, 'date', and you need to merge them whil...Programming Published on 2024-11-16
-
How Can I Find Users with Today\'s Birthdays Using MySQL?How to Identify Users with Today's Birthdays Using MySQLDetermining if today is a user's birthday using MySQL involves finding all rows where ...Programming Published on 2024-11-16
-
Why Do Special Characters Appear as Black Diamonds with a Question Mark in PHP?PHP Character Encoding Issue: Little Black Diamonds with a Question MarkUsers frequently encounter a peculiar issue when retrieving data from a databa...Programming Published on 2024-11-16
-
What Happened to Column Offsetting in Bootstrap 4 Beta?Bootstrap 4 Beta: The Removal and Restoration of Column OffsettingBootstrap 4, in its Beta 1 release, introduced significant changes to the way column...Programming Published on 2024-11-16
-
Can CURL Be an Alternative to file_get_contents for Fetching External Links?Using CURL to Fetch External Links (Alternative to file_get_contents)For fetching external links on a specific page, the file_get_contents function is...Programming Published on 2024-11-16
-
How Does Go\'s FileMode Function Handle Octal and Decimal Permissions Conversion?Parsing Permissions for FileMode Function in GoThe os.FileMode function converts permissions from various formats before setting the flags. These form...Programming Published on 2024-11-16
-
## How to Download Files from FTP Servers on Android: Which Java Library is Best?FTP Libraries for AndroidIn search of a reliable Java library that facilitates file downloading and resumption from FTP servers on Android devices? Le...Programming Published on 2024-11-16
-
Why Does Java\'s Modulo Operator Return a Negative Result for Negative Numbers?Negative Modulo Results in JavaWhen performing modulo operations with negative numbers in Java, you may have noticed that the results differ from thos...Programming Published on 2024-11-16
-
Why is TCPDF the best PDF-API for PHP?Determining the Best PDF-API for PHPIn the realm of PDF generation using PHP, multiple options present themselves, each offering its unique strengths ...Programming Published on 2024-11-16
-
How to Join Tables with Comma-Separated Value Fields in SQL?Querying Multiple Join Fields with Comma-Separated ValuesIn SQL, when dealing with tables containing comma-separated-lists (CSVs) in their fields, it ...Programming Published on 2024-11-16
-
Why is Thread.stop() Deprecated in Java: A Look at Safety Concerns and Alternatives?Thread Termination in Java: Why is Thread.stop() Deprecated?Thread.stop() in Java is deprecated due to inherent safety issues. Stopping a thread using...Programming Published on 2024-11-16
-
Here are several possible titles, choose the most appropriate one based on the content of the article: * How to fix \"invalid version: git ls-remote -q origin\" error when using go mod tidy with private GitHub repositories? * Downloading privatgo mod tidy is blocked and cannot download the GitHub private repositoryWhen trying to use go mod tidy to download the GitHub private repository, you ...Programming Published on 2024-11-16
Study Chinese
- 1 How do you say "walk" in Chinese? 走路 Chinese pronunciation, 走路 Chinese learning
- 2 How do you say "take a plane" in Chinese? 坐飞机 Chinese pronunciation, 坐飞机 Chinese learning
- 3 How do you say "take a train" in Chinese? 坐火车 Chinese pronunciation, 坐火车 Chinese learning
- 4 How do you say "take a bus" in Chinese? 坐车 Chinese pronunciation, 坐车 Chinese learning
- 5 How to say drive in Chinese? 开车 Chinese pronunciation, 开车 Chinese learning
- 6 How do you say swimming in Chinese? 游泳 Chinese pronunciation, 游泳 Chinese learning
- 7 How do you say ride a bicycle in Chinese? 骑自行车 Chinese pronunciation, 骑自行车 Chinese learning
- 8 How do you say hello in Chinese? 你好Chinese pronunciation, 你好Chinese learning
- 9 How do you say thank you in Chinese? 谢谢Chinese pronunciation, 谢谢Chinese learning
- 10 How to say goodbye in Chinese? 再见Chinese pronunciation, 再见Chinese learning
