install libpthread linker script, when threads are enabled, reported by Oliver

package/uclibc-ng/Makefile

@@ -52,6 +52,10 @@ uclibc-ng-dev-install:
 	${INSTALL_DIR} ${IDIR_UCLIBC_NG_DEV}/usr/lib ${IDIR_UCLIBC_NG_DEV}/$(ADK_TARGET_LIBC_PATH)
 	${CP} ${STAGING_TARGET_DIR}/usr/lib/libc.so ${IDIR_UCLIBC_NG_DEV}/usr/lib
 	${CP} ${STAGING_TARGET_DIR}/usr/lib/uclibc_nonshared.a ${IDIR_UCLIBC_NG_DEV}/usr/lib
+ifeq ($(ADK_TARGET_LIB_WITH_THREADS),y)
+	${CP} ${STAGING_TARGET_DIR}/usr/lib/libpthread.so ${IDIR_UCLIBC_NG_DEV}/usr/lib
+	${CP} ${STAGING_TARGET_DIR}/usr/lib/libpthread_nonshared.a ${IDIR_UCLIBC_NG_DEV}/usr/lib
+endif
 	${CP} ${STAGING_TARGET_DIR}/usr/lib/crt*.o ${IDIR_UCLIBC_NG_DEV}/usr/lib
 	for file in libcrypt libdl libm libresolv libutil libuargp; do \
 		cd $(IDIR_UCLIBC_NG_DEV)/$(ADK_TARGET_LIBC_PATH); ln -sf $$file-$(PKG_VERSION).so $$file.so; \