Without this patch, systems that provide stubs for pthread functions
in libc, but which still require libpthread for full the pthread
implementation are not detected correctly.
Also, some systems require -pthread in CFLAGS for each compilation
unit for a successful link of an mt binary, which is also addressed by
this patch.
---
Makefile | 4 ++++
config.mak.in | 1 +
configure.ac | 17 +++++++++++++++--
3 files changed, 20 insertions(+), 2 deletions(-)
Index: b/Makefile
===================================================================
--- a/Makefile
+++ b/Makefile
@@ -287,6 +287,7 @@ RPMBUILD = rpmbuild
TCL_PATH = tclsh
TCLTK_PATH = wish
PTHREAD_LIBS = -lpthread
+PTHREAD_CFLAGS =
export TCL_PATH TCLTK_PATH
@@ -856,6 +857,8 @@ ifeq ($(uname_S),AIX)
BASIC_CFLAGS += -D_LARGE_FILES
ifeq ($(shell expr "$(uname_V)" : '[1234]'),1)
NO_PTHREADS = YesPlease
+ else
+ PTHREAD_LIBS = -lpthread
endif
endif
ifeq ($(uname_S),GNU)
@@ -1297,6 +1300,7 @@ endif
ifdef NO_PTHREADS
BASIC_CFLAGS += -DNO_PTHREADS
else
+ BASIC_CFLAGS += $(PTHREAD_CFLAGS)
EXTLIBS += $(PTHREAD_LIBS)
LIB_OBJS += thread-utils.o
endif
Index: b/configure.ac
===================================================================
--- a/configure.ac
+++ b/configure.ac
@@ -782,7 +782,11 @@ AC_DEFUN([PTHREADTEST_SRC], [
int main(void)
{
pthread_mutex_t test_mutex;
- return (0);
+ int retcode = 0;
+ retcode |= pthread_mutex_init(&test_mutex,(void*)0);
+ retcode |= pthread_mutex_lock(&test_mutex);
+ retcode |= pthread_mutex_unlock(&test_mutex);
+ return retcode;
}
])
@@ -799,7 +803,8 @@ if test -n "$USER_NOPTHREAD"; then
# handle these separately since PTHREAD_CFLAGS could be '-lpthreads
# -D_REENTRANT' or some such.
elif test -z "$PTHREAD_CFLAGS"; then
- for opt in -pthread -lpthread; do
+ threads_found=no
+ for opt in -mt -pthread -lpthread; do
old_CFLAGS="$CFLAGS"
CFLAGS="$opt $CFLAGS"
AC_MSG_CHECKING([Checking for POSIX Threads with '$opt'])
@@ -807,11 +812,18 @@ elif test -z "$PTHREAD_CFLAGS"; then
[AC_MSG_RESULT([yes])
NO_PTHREADS=
PTHREAD_LIBS="$opt"
+ PTHREAD_CFLAGS="$opt"
+ threads_found=yes
break
],
[AC_MSG_RESULT([no])])
CFLAGS="$old_CFLAGS"
done
+ if test $threads_found != yes; then
+ AC_CHECK_LIB([pthread], [pthread_create],
+ [PTHREAD_LIBS="-lpthread"],
+ [NO_PTHREADS=UnfortunatelyYes])
+ fi
else
old_CFLAGS="$CFLAGS"
CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
@@ -828,6 +840,7 @@ fi
CFLAGS="$old_CFLAGS"
+AC_SUBST(PTHREAD_CFLAGS)
AC_SUBST(PTHREAD_LIBS)
AC_SUBST(NO_PTHREADS)
Index: b/config.mak.in
===================================================================
--- a/config.mak.in
+++ b/config.mak.in
@@ -57,4 +57,5 @@ NO_DEFLATE_BOUND=@NO_DEFLATE_BOUND@
FREAD_READS_DIRECTORIES=@FREAD_READS_DIRECTORIES@
SNPRINTF_RETURNS_BOGUS=@SNPRINTF_RETURNS_BOGUS@
NO_PTHREADS=@NO_PTHREADS@
+PTHREAD_CFLAGS=@PTHREAD_CFLAGS@
PTHREAD_LIBS=@PTHREAD_LIBS@
--
Gary V. Vaughan (gary@xxxxxxxxxxxxxxxxxx)
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