PING^1 [PATCH] cpp/remap: Only override if string matched

[Torbjorn SVENSSON via Gcc-patches]

Hi,

Ping, https://gcc.gnu.org/pipermail/gcc-patches/2022-October/604062.html

Ok for trunk?

Kind regards,
Torbjörn

On 2022-10-20 22:48, Torbjörn SVENSSON wrote:

For systems with HAVE_DOS_BASED_FILE_SYSTEM set, only override the
pointer if the backslash pattern matches.

Output without this patch:
.../gcc/testsuite/gcc.dg/cpp/pr71681-2.c:5:10: fatal error: a/t2.h: No such 
file or directory

With patch applied, no output and the test case succeeds.

libcpp/ChangeLog

        * files.cc: Ensure pattern matches before use.

Signed-off-by: Torbjörn SVENSSON <torbjorn.svens...@foss.st.com>
---
  libcpp/files.cc | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libcpp/files.cc b/libcpp/files.cc
index 24208f7b0f8..a18b1caf48d 100644
--- a/libcpp/files.cc
+++ b/libcpp/files.cc
@@ -1833,7 +1833,7 @@ remap_filename (cpp_reader *pfile, _cpp_file *file)
  #ifdef HAVE_DOS_BASED_FILE_SYSTEM
        {
        const char *p2 = strchr (fname, '\\');
-       if (!p || (p > p2))
+       if (!p || (p2 && p > p2))
          p = p2;
        }
  #endif