[binutils-gdb/binutils-2_46-branch] Fix the strrchr error for DOS based filesystem

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=b88558ce1a1c405db0846b938960c22e4ceb41f8

commit b88558ce1a1c405db0846b938960c22e4ceb41f8
Author: H.J. Lu <[email protected]>
Date:   Sun May 3 08:25:28 2026 +0800

    Fix the strrchr error for DOS based filesystem
    
    Fix the strrchr error like:
    
    gprof/source.c:130:28: error: initialization discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
      130 |             char *bslash = strrchr (sf->name, '\\');
    
    binutils/
    
            PR binutils/34125
            * bucomm.c (template_in_dir): Make bslash const char *.
    
    gprof/
    
            PR binutils/34125
            * source.c (annotate_source): Make bslash const char *.
    
    Signed-off-by: H.J. Lu <[email protected]>
    (cherry picked from commit 365fc34606d2d566855e8ba3db9c4f7986ed3bcc)

Diff:
---
 binutils/bucomm.c | 2 +-
 gprof/source.c    | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/binutils/bucomm.c b/binutils/bucomm.c
index 0f25a3c4038..3e8f5907363 100644
--- a/binutils/bucomm.c
+++ b/binutils/bucomm.c
@@ -500,7 +500,7 @@ template_in_dir (const char *path)
 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
   {
     /* We could have foo/bar\\baz, or foo\\bar, or d:bar.  */
-    char *bslash = strrchr (path, '\\');
+    const char *bslash = strrchr (path, '\\');
 
     if (slash == NULL || (bslash != NULL && bslash > slash))
       slash = bslash;
diff --git a/gprof/source.c b/gprof/source.c
index aae55f6d758..4aa7504e8df 100644
--- a/gprof/source.c
+++ b/gprof/source.c
@@ -127,7 +127,7 @@ annotate_source (Source_File *sf, unsigned int max_width,
 	  name_only = strrchr (sf->name, '/');
 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
 	  {
-	    char *bslash = strrchr (sf->name, '\\');
+	    const char *bslash = strrchr (sf->name, '\\');
 	    if (name_only == NULL || (bslash != NULL && bslash > name_only))
 	      name_only = bslash;
 	    if (name_only == NULL && sf->name[0] != '\0' && sf->name[1] == ':')
@@ -184,7 +184,7 @@ annotate_source (Source_File *sf, unsigned int max_width,
       filename = strrchr (sf->name, '/');
 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
 	{
-	  char *bslash = strrchr (sf->name, '\\');
+	  const char *bslash = strrchr (sf->name, '\\');
 	  if (filename == NULL || (bslash != NULL && bslash > filename))
 	    filename = bslash;
 	  if (filename == NULL && sf->name[0] != '\0' && sf->name[1] == ':')