Use backslash escape, replacing xargs -0 in test macro-multiline.c

Summary:
xargs supports escaping of newline characters with backslash.
xargs -0 is neither part of POSIX nor the LSB.

This patch removes the -0 option and adjusts the input to xargs
accordingly; that is, the input is a text file not ending in an
incomplete line, and the newline of interest is preceded by a backslash.

Note: The treatment of escaped newline characters is not as clearly
specified by POSIX as for escaped blank characters; however, the same
can be said for escaped backslashes. It is slightly more clear for the
case where the -I option is used; however, -I is also of limited
portability.

Reviewers: bruno

Reviewed By: bruno

Subscribers: bruno, rcraik, cfe-commits

Differential Revision: https://reviews.llvm.org/D41544

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@321828 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Preprocessor/macro-multiline.c b/test/Preprocessor/macro-multiline.c
index 72a5d20e523f3e95217f8f7bd4319f8365a2edde..664c37cd02a48c736b4bf7f033a61a79515c3b1d 100644 (file)
--- a/test/Preprocessor/macro-multiline.c
+++ b/test/Preprocessor/macro-multiline.c
@@ -1,4 +1,4 @@
-// RUN: printf -- "-DX=A\nTHIS_SHOULD_NOT_EXIST_IN_THE_OUTPUT" | xargs -0 %clang -E %s | FileCheck -strict-whitespace %s
+// RUN: printf -- "-DX=A\\\\\nTHIS_SHOULD_NOT_EXIST_IN_THE_OUTPUT\n" | xargs %clang -E %s | FileCheck -strict-whitespace %s
 
 // Per GCC -D semantics, \n and anything that follows is ignored.