Import pthread <sys/types.h> compatibility check.

CHANGES

@@ -22,6 +22,7 @@ Changes included in OpenLDAP 1.1.x
 	Build environment
 		Added DB2 patch information
 		Added distclean target
+		Added pthread sys/types.h compatibility check
 		Fixed doc/man reinstall bug
 		Fixed make clean
 		Fixed --disable-slurpd

configure.in

@@ -788,6 +788,22 @@ if test $ol_with_threads = auto -o $ol_with_threads = yes \
 			if test $ol_with_yielding_select = auto ; then
 				ol_with_yielding_select=yes
 			fi
+
+			AC_CACHE_CHECK([for misplaced posix thread in headers],
+				[ol_cv_header_misplaced_pthreads], [
+				AC_TRY_COMPILE([
+#include <sys/types.h>
+typedef double pthread_t;
+				], [
+				pthread_t thread = 0.0;
+				],
+				[ol_cv_header_misplaced_pthreads=no],
+				[ol_cv_header_misplaced_pthreads=yes])
+			])
+
+			if test "$ol_cv_header_misplaced_pthreads" = yes ; then
+				AC_MSG_ERROR([pthread types are misplaced, use --with-threads=posix]);
+			fi
 		fi
 	fi
 
@@ -870,6 +886,22 @@ if test $ol_link_threads = no ; then
 		ol_with_threads=no
 	fi
 
+	AC_CACHE_CHECK([for misplaced posix thread in headers],
+		[ol_cv_header_misplaced_pthreads], [
+		AC_TRY_COMPILE([
+#include <sys/types.h>
+typedef double pthread_t;
+			], [
+				pthread_t thread = 0.0;
+			],
+			[ol_cv_header_misplaced_pthreads=no],
+			[ol_cv_header_misplaced_pthreads=yes])
+	])
+
+	if test "$ol_cv_header_misplaced_pthreads" = yes ; then
+		AC_MSG_ERROR([pthread types are misplaced, use --with-threads=posix]);
+	fi
+
 	AC_DEFINE(NO_THREADS,1)
 	LTHREAD_LIBS=""
 fi