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| author | Shea Levy <shea@shealevy.com> | 2016-11-15 22:01:20 -0500 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2016-11-15 22:01:37 -0500 |
| commit | a637eeb7a1852adfd99b06d2c0a3496e4f238a0c (patch) | |
| tree | cab7490a0d78ed776c7caadc6a8d779c8f7b50bb | |
| parent | 4a835f0890b4848b32129ab11ceb29cb0a0769f6 (diff) | |
| download | haskell-a637eeb7a1852adfd99b06d2c0a3496e4f238a0c.tar.gz | |
Don't use mmap symbols when !RTS_LINKER_USE_MMAP
Some usages of symbols from sys/mman.h are guarded by
RTS_LINKER_USE_MMAP by C conditionals, not CPP conditionals. Since those
branches are dead anyway when !RTS_LINKER_USE_MMAP, we just stub out the
relevant symbols rather than increasing CPP branching.
Fixes #12839.
Reviewers: simonmar, austin, bgamari, erikd
Reviewed By: simonmar, bgamari, erikd
Subscribers: thomie
Differential Revision: https://phabricator.haskell.org/D2710
GHC Trac Issues: #12839
| -rw-r--r-- | rts/LinkerInternals.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/rts/LinkerInternals.h b/rts/LinkerInternals.h index 60370bbcd2..4806d53a9a 100644 --- a/rts/LinkerInternals.h +++ b/rts/LinkerInternals.h @@ -303,4 +303,14 @@ char *cstring_from_section_name( # define OBJFORMAT_MACHO #endif +/* In order to simplify control flow a bit, some references to mmap-related + definitions are blocked off by a C-level if statement rather than a CPP-level + #if statement. Since those are dead branches when !RTS_LINKER_USE_MMAP, we + just stub out the relevant symbols here +*/ +#if !RTS_LINKER_USE_MMAP +#define munmap(x,y) /* nothing */ +#define MAP_ANONYMOUS 0 +#endif + #endif /* LINKERINTERNALS_H */ |