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| author | Erik de Castro Lopo <erikd@mega-nerd.com> | 2016-05-16 13:59:57 +1000 |
|---|---|---|
| committer | Erik de Castro Lopo <erikd@mega-nerd.com> | 2016-05-17 06:25:16 +1000 |
| commit | 4a037a9a933e043bdc08ae13bfbc846fe0e26ec9 (patch) | |
| tree | 174abb3eae2783d82eacfb6446b76a1f10114ed1 /configure.ac | |
| parent | 781442096b02a3dac7ab5ad6335f07b7edb569ea (diff) | |
| download | haskell-4a037a9a933e043bdc08ae13bfbc846fe0e26ec9.tar.gz | |
Set `USE_MMAP` at configure time
Summary:
The `USE_MMAP` macro is used in the run time linker and was being set with
some really ugly CPP hackery. Setting in the configure script is much
neater.
Reviewers: rwbarton, hvr, austin, simonmar, bgamari
Reviewed By: hvr, bgamari
Subscribers: thomie
Differential Revision: https://phabricator.haskell.org/D2223
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index ff0dc054af..4adf9c5558 100644 --- a/configure.ac +++ b/configure.ac @@ -1062,6 +1062,34 @@ if test "$use_large_address_space" = "yes" ; then AC_DEFINE([USE_LARGE_ADDRESS_SPACE], [1], [Enable single heap address space support]) fi +dnl ** Use MMAP in the runtime linker? +dnl -------------------------------------------------------------- + +case ${TargetOS} in + linux|freebsd|dragonfly|netbsd|openbsd|kfreebsdgnu|gnu|solaris2) + RtsLinkerUseMmap=1 + ;; + darwin) + # Don't use mmap on powerpc/darwin as the mmap there doesn't support + # reallocating. Reallocating is needed to allocate jump islands just + # after each object image. Jumps to these jump islands use relative + # branches which are limited to offsets that can be represented in + # 24-bits. + if test "$TargetArch" != "powerpc" ; then + RtsLinkerUseMmap=1 + else + RtsLinkerUseMmap=0 + fi + ;; + *) + # Windows (which doesn't have mmap) and everything else. + RtsLinkerUseMmap=0 + ;; + esac + +AC_DEFINE_UNQUOTED([RTS_LINKER_USE_MMAP], [$RtsLinkerUseMmap], + [Use mmap in the runtime linker]) + dnl ** Have libdw? dnl -------------------------------------------------------------- AC_ARG_ENABLE(libdw, |