infix_config.h

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#pragma once
// System Feature Test Macros
#if !defined(_POSIX_C_SOURCE)
#define _POSIX_C_SOURCE 200809L
#endif
#if (defined(__linux__) || defined(__gnu_linux__)) && !defined(_GNU_SOURCE)
#define _GNU_SOURCE
#endif
// Operating System Detection
#if defined(_WIN32)
#define INFIX_OS_WINDOWS
#include <windows.h>  // Included early for common types like SYSTEM_INFO, HANDLE, etc.
// Compatibility shim for POSIX types not present in Clang/MSVC headers.
#if !defined(__CYGWIN__)  // Cygwin provides its own full POSIX environment
#include <stddef.h>       // For ptrdiff_t
#ifndef ssize_t
// Define ssize_t as ptrdiff_t, the standard signed counterpart to size_t.
typedef ptrdiff_t ssize_t;
#endif
#endif
#if defined(__MSYS__)
#define INFIX_ENV_MSYS 1
#elif defined(__CYGWIN__)
#define INFIX_ENV_CYGWIN 1
#define INFIX_ENV_POSIX 1
#elif defined(__MINGW32__) || defined(__MINGW64__)
#define INFIX_ENV_MINGW 1
#endif
#elif defined(__TERMUX__)
#define INFIX_OS_TERMUX
#define INFIX_OS_ANDROID
#define INFIX_OS_LINUX
#define INFIX_ENV_POSIX
#define INFIX_ENV_TERMUX 1
#elif defined(__ANDROID__)
#define INFIX_OS_ANDROID
#define INFIX_OS_LINUX
#define INFIX_ENV_POSIX
#elif defined(__APPLE__)
#define INFIX_ENV_POSIX
#define _DARWIN_C_SOURCE
#include <TargetConditionals.h>
#include <libkern/OSCacheControl.h>
#include <pthread.h>
#if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
#define INFIX_OS_IOS
#elif TARGET_OS_MAC
#define INFIX_OS_MACOS
#else
#error "Unsupported/unknown Apple platform"
#endif
#elif defined(__linux__)
#define INFIX_OS_LINUX
#define INFIX_ENV_POSIX
#elif defined(__FreeBSD__)
#define INFIX_OS_FREEBSD
#define INFIX_ENV_POSIX
#elif defined(__OpenBSD__)
#define INFIX_OS_OPENBSD
#define INFIX_ENV_POSIX
#elif defined(__NetBSD__)
#define INFIX_OS_NETBSD
#define INFIX_ENV_POSIX
#elif defined(__DragonFly__)
#define INFIX_OS_DRAGONFLY
#define INFIX_ENV_POSIX
#elif defined(__sun) && defined(__SVR4)
#define INFIX_OS_SOLARIS
#define INFIX_ENV_POSIX
#elif defined(__HAIKU__)
#define INFIX_OS_HAIKU
#define INFIX_ENV_POSIX
#else
#warning "Unsupported/unknown operating system"
#endif
// Compiler Detection
#if defined(__clang__)
#define INFIX_COMPILER_CLANG
#elif defined(_MSC_VER)
#define INFIX_COMPILER_MSVC
#elif defined(__GNUC__)
#define INFIX_COMPILER_GCC
#else
#warning "Compiler: Unknown compiler detected."
#define INFIX_COMPILER_NFI
#endif
// CPU Architecture Detection
#if defined(__aarch64__) || defined(_M_ARM64)
#define INFIX_ARCH_AARCH64
#elif defined(__x86_64__) || defined(_M_X64)
#define INFIX_ARCH_X64
#else
#error "Unsupported architecture. Only x86-64 and AArch64 are currently supported."
#endif
// Target ABI Logic Selection
#if defined(INFIX_FORCE_ABI_WINDOWS_X64)
#define INFIX_ABI_WINDOWS_X64 1
#define INFIX_ABI_FORCED 1
#elif defined(INFIX_FORCE_ABI_SYSV_X64)
#define INFIX_ABI_SYSV_X64 1
#define INFIX_ABI_FORCED 1
#elif defined(INFIX_FORCE_ABI_AAPCS64)
#define INFIX_ABI_AAPCS64 1
#define INFIX_ABI_FORCED 1
#endif
// Automatic ABI detection if not forced by the user.
#ifndef INFIX_ABI_FORCED
#if defined(INFIX_ARCH_AARCH64)
// All AArch64 platforms (Linux, macOS, Windows) use the same base calling
// convention (AAPCS64), although with minor differences for variadic arguments
// that are handled within the `abi_arm64.c` implementation.
#define INFIX_ABI_AAPCS64
#elif defined(INFIX_ARCH_X64)
#if defined(INFIX_OS_WINDOWS)
// Windows on x86-64 uses the Microsoft x64 calling convention.
#define INFIX_ABI_WINDOWS_X64
#else
// All other x86-64 platforms (Linux, macOS, BSDs, etc.) use the System V AMD64 ABI.
#define INFIX_ABI_SYSV_X64
#endif
#endif
#endif  // INFIX_ABI_FORCED
// Miscellaneous Constants
#define INFIX_TRAMPOLINE_HEADROOM 128