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| author | David M Peixotto <dmp@rice.edu> | 2011-06-28 15:31:42 -0500 |
|---|---|---|
| committer | David M Peixotto <dmp@rice.edu> | 2011-10-07 16:48:34 -0500 |
| commit | dba7254566b121408e7167200d0223a531b66e8b (patch) | |
| tree | 0a3bfcb739b35123822cb644db93081b46c54fca /includes/Stg.h | |
| parent | 29a97fded4010bd01aa0a17945c84258e285d421 (diff) | |
| download | haskell-dba7254566b121408e7167200d0223a531b66e8b.tar.gz | |
Enable pthread_getspecific() tls for LLVM compiler
LLVM does not support the __thread attribute for thread
local storage and may generate incorrect code for global
register variables. We want to allow building the runtime with
LLVM-based compilers such as llvm-gcc and clang,
particularly for MacOS.
This patch changes the gct variable used by the garbage
collector to use pthread_getspecific() for thread local
storage when an llvm based compiler is used to build the
runtime.
Diffstat (limited to 'includes/Stg.h')
| -rw-r--r-- | includes/Stg.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/includes/Stg.h b/includes/Stg.h index 5665018d93..5b3b20d4d6 100644 --- a/includes/Stg.h +++ b/includes/Stg.h @@ -49,7 +49,10 @@ # define _BSD_SOURCE #endif -#if IN_STG_CODE == 0 +#if IN_STG_CODE == 0 || defined(llvm_CC_FLAVOR) +// C compilers that use an LLVM back end (clang or llvm-gcc) do not +// correctly support global register variables so we make sure that +// we do not declare them for these compilers. # define NO_GLOBAL_REG_DECLS /* don't define fixed registers */ #endif |