diff options
Diffstat (limited to 'libphobos/m4/druntime/libraries.m4')
| -rw-r--r-- | libphobos/m4/druntime/libraries.m4 | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/libphobos/m4/druntime/libraries.m4 b/libphobos/m4/druntime/libraries.m4 index 9e8e210df5a..957bf98b442 100644 --- a/libphobos/m4/druntime/libraries.m4 +++ b/libphobos/m4/druntime/libraries.m4 @@ -212,3 +212,27 @@ AC_DEFUN([DRUNTIME_LIBRARIES_CLIB], AC_SUBST(DCFG_HAVE_QSORT_R) AC_LANG_POP([C]) ]) + +# DRUNTIME_LIBRARIES_UCONTEXT +# ------------------------------ +# Autodetect and add ucontext library to LIBS if necessary. +# This is only required if fiber_switchContext does not have +# its own internal asm implementation. +AC_DEFUN([DRUNTIME_LIBRARIES_UCONTEXT], +[ + # Keep this in sync with core/thread.d, set druntime_fiber_asm_external to + # "yes" for targets that have 'version = AsmExternal'. + druntime_fiber_asm_external=no + case "$target_cpu" in + aarch64* | \ + arm* | \ + i[[34567]]86|x86_64 | \ + powerpc) + druntime_fiber_asm_external=yes + ;; + esac + if test "$druntime_fiber_asm_external" = no; then + AC_SEARCH_LIBS([swapcontext], [c ucontext], [], + AC_MSG_ERROR([swapcontext required but not found])) + fi +]) |