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| author | Ben Gamari <bgamari.foss@gmail.com> | 2017-02-26 19:28:08 -0500 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2017-02-28 09:26:14 -0500 |
| commit | e94bfb677298de3c4b4e0d1223fbc589849b79be (patch) | |
| tree | 8d08b958316bc74f64f3dd9bc57e4427c7238901 /configure.ac | |
| parent | 36b6e131d252814bca8bf7e684e50466dc12483b (diff) | |
| download | haskell-e94bfb677298de3c4b4e0d1223fbc589849b79be.tar.gz | |
configure: detect whether -lpthreads is necessary for pthreads
Some platforms have pthreads support available without linking against
libpthread (and indeed don't even offer a libpthread to link against).
One example of this is Android's bionic library. Teach the RTS about
this case.
Test Plan: Validate while cross-compiling targetting Android on aarch64
Reviewers: simonmar, austin, hvr, erikd, rwbarton
Subscribers: danharaj, thomie, erikd, snowleopard
Differential Revision: https://phabricator.haskell.org/D3149
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index ec526d8892..3c153c6680 100644 --- a/configure.ac +++ b/configure.ac @@ -946,6 +946,31 @@ AC_TRY_LINK_FUNC(printf\$LDBLStub, [Define to 1 if we have printf$LDBLStub (Apple Mac OS >= 10.4, PPC).]) ]) +dnl Some platforms (e.g. Android's Bionic) have pthreads support available +dnl without linking against libpthread. Check whether -lpthread is necessary +dnl to use pthreads. +dnl +dnl Note that it is important that this happens before we AC_CHECK_LIB(thread) +AC_MSG_CHECKING(whether -lpthread is needed for pthreads) +AC_CHECK_FUNC(pthread_create, + [ + AC_MSG_RESULT(no) + need_lpthread=0 + ], + [ + AC_CHECK_LIB(pthread, pthread_create, + [ + AC_MSG_RESULT(yes) + need_lpthread=1 + ], + [ + AC_MSG_RESULT([no pthreads support found.]) + need_lpthread=0 + ]) + ]) +AC_DEFINE_UNQUOTED([NEED_PTHREAD_LIB], [$need_lpthread], + [Define 1 if we need to link code using pthreads with -lpthread]) + dnl ** pthread_setname_np is a recent addition to glibc, and OS X has dnl a different single-argument version. AC_CHECK_LIB(pthread, pthread_setname_np) |