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|
-- | A description of the platform we're compiling for.
-- In the future, this module should be the only one that references
-- the evil #defines for each TARGET_ARCH and TARGET_OS
--
module Platform (
Platform(..),
Arch(..),
OS(..),
defaultTargetPlatform,
target32Bit,
osElfTarget
)
where
import Panic
#include "HsVersions.h"
-- | Contains enough information for the native code generator to emit
-- code for this platform.
data Platform
= Platform
{ platformArch :: Arch
, platformOS :: OS }
-- | Architectures that the native code generator knows about.
-- TODO: It might be nice to extend these constructors with information
-- about what instruction set extensions an architecture might support.
--
data Arch
= ArchUnknown
| ArchX86
| ArchX86_64
| ArchPPC
| ArchPPC_64
| ArchSPARC
deriving (Show, Eq)
-- | Operating systems that the native code generator knows about.
-- Having OSUnknown should produce a sensible default, but no promises.
data OS
= OSUnknown
| OSLinux
| OSDarwin
| OSSolaris2
| OSMinGW32
| OSFreeBSD
| OSOpenBSD
deriving (Show, Eq)
target32Bit :: Platform -> Bool
target32Bit p = case platformArch p of
ArchUnknown -> panic "Don't know if ArchUnknown is 32bit"
ArchX86 -> True
ArchX86_64 -> False
ArchPPC -> True
ArchPPC_64 -> False
ArchSPARC -> True
-- | This predicates tells us whether the OS supports ELF-like shared libraries.
osElfTarget :: OS -> Bool
osElfTarget OSLinux = True
osElfTarget OSFreeBSD = True
osElfTarget OSOpenBSD = True
osElfTarget OSSolaris2 = True
osElfTarget OSDarwin = False
osElfTarget OSMinGW32 = False
osElfTarget OSUnknown = panic "Don't know if OSUnknown is elf"
-- | This is the target platform as far as the #ifdefs are concerned.
-- These are set in includes/ghcplatform.h by the autoconf scripts
defaultTargetPlatform :: Platform
defaultTargetPlatform
= Platform defaultTargetArch defaultTargetOS
-- | Move the evil TARGET_ARCH #ifdefs into Haskell land.
defaultTargetArch :: Arch
#if i386_TARGET_ARCH
defaultTargetArch = ArchX86
#elif x86_64_TARGET_ARCH
defaultTargetArch = ArchX86_64
#elif powerpc_TARGET_ARCH
defaultTargetArch = ArchPPC
#elif powerpc64_TARGET_ARCH
defaultTargetArch = ArchPPC_64
#elif sparc_TARGET_ARCH
defaultTargetArch = ArchSPARC
#else
defaultTargetArch = ArchUnknown
#endif
-- | Move the evil TARGET_OS #ifdefs into Haskell land.
defaultTargetOS :: OS
#if linux_TARGET_OS
defaultTargetOS = OSLinux
#elif darwin_TARGET_OS
defaultTargetOS = OSDarwin
#elif solaris2_TARGET_OS
defaultTargetOS = OSSolaris2
#elif mingw32_TARGET_OS
defaultTargetOS = OSMinGW32
#elif freebsd_TARGET_OS
defaultTargetOS = OSFreeBSD
#elif openbsd_TARGET_OS
defaultTargetOS = OSOpenBSD
#else
defaultTargetOS = OSUnknown
#endif
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