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These patches make threading optional in LLVM. The configuration scripts are now
modified to accept a --disable-threads switch. If this is used, the Mutex class
will be implemented with all functions as no-op. Furthermore, linking against
libpthread will not be done. Finally, the ParallelJIT example needs libpthread
so its makefile was changed to always add -lpthread to the link line.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23003 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2005-08-24 10:07:20 +00:00
parent 6ef4949a0b
commit 0a262ba7c3
6 changed files with 259 additions and 194 deletions
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28
autoconf/configure.ac
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@@ -230,6 +230,18 @@ case "$enableval" in
*) AC_MSG_ERROR([Invalid setting for --enable-doxygen. Use "yes" or "no"]) ;;
esac
dnl Allow disablement of threads
AC_ARG_ENABLE(threads,
AS_HELP_STRING([--enable-threads],
[Use threads if available (default is YES)]),,
enableval=yes)
case "$enableval" in
yes) AC_SUBST(ENABLE_THREADS,[1]) ;;
no) AC_SUBST(ENABLE_THREADS,[0]) ;;
*) AC_MSG_ERROR([Invalid setting for --enable-threads. Use "yes" or "no"]) ;;
esac
AC_DEFINE_UNQUOTED([ENABLE_THREADS],$ENABLE_THREADS,[Define if threads enabled])
dnl Allow specific targets to be specified for building (or not)
TARGETS_TO_BUILD=""
AC_ARG_ENABLE([targets],AS_HELP_STRING([--enable-target],
@@ -447,10 +459,12 @@ AC_SEARCH_LIBS(mallinfo,malloc,AC_DEFINE([HAVE_MALLINFO],[1],
dnl pthread locking functions are optional - but llvm will not be thread-safe
dnl without locks.
AC_CHECK_LIB(pthread,pthread_mutex_init)
AC_SEARCH_LIBS(pthread_mutex_lock,pthread,
AC_DEFINE([HAVE_PTHREAD_MUTEX_LOCK],[1],
[Have pthread_mutex_lock]))
if test "$ENABLE_THREADS" -eq 1 ; then
AC_CHECK_LIB(pthread,pthread_mutex_init)
AC_SEARCH_LIBS(pthread_mutex_lock,pthread,
AC_DEFINE([HAVE_PTHREAD_MUTEX_LOCK],[1],
[Have pthread_mutex_lock]))
fi
dnl===-----------------------------------------------------------------------===
dnl===
@@ -470,10 +484,12 @@ AC_HEADER_SYS_WAIT
AC_HEADER_TIME
AC_CHECK_HEADERS([dlfcn.h execinfo.h fcntl.h inttypes.h limits.h link.h])
AC_CHECK_HEADERS([malloc.h pthread.h signal.h stdint.h unistd.h utime.h])
AC_CHECK_HEADERS([windows.h])
AC_CHECK_HEADERS([malloc.h signal.h stdint.h unistd.h utime.h windows.h])
AC_CHECK_HEADERS([sys/mman.h sys/param.h sys/resource.h sys/time.h sys/types.h])
AC_CHECK_HEADERS([rw/stdex/hash_map.h rw/stdex/hash_set.h])
if test "$ENABLE_THREADS" -eq 1 ; then
AC_CHECK_HEADERS(pthread.h)
fi
dnl===-----------------------------------------------------------------------===
dnl===