From: Huang Rui <vowstar@gmail.com>
Date: Wed, 11 Dec 2025 00:00:00 +0000
Subject: [PATCH] Fix strcasestr return type to match glibc

The glibc declaration of strcasestr returns 'char *' while drmemory
declared it as returning 'const char *'. This causes a conflicting
types error with GCC 15. Fix by matching the standard library signature
and updating the implementation to use non-const internal pointers.

--- a/common/utils.h
+++ b/common/utils.h
@@ -1011,7 +1011,7 @@
 #define MAX_OPTION_LEN DR_MAX_OPTIONS_LENGTH

 #if !defined(MACOS) && !defined(ANDROID) && !defined(NOLINK_STRCASESTR)
-const char *
+char *
 strcasestr(const char *text, const char *pattern);
 #endif

--- a/common/utils_shared.c
+++ b/common/utils_shared.c
@@ -51,12 +51,13 @@
  * want a libc dependence.
  */
 #if !defined(MACOS) && !defined(ANDROID) && !defined(NOLINK_STRCASESTR)
-const char *
+char *
 strcasestr(const char *text, const char *pattern)
 {
-    const char *cur_text, *cur_pattern, *root;
+    const char *cur_text, *cur_pattern;
+    char *root;
     cur_text = text;
-    root = text;
+    root = (char *)text;
     cur_pattern = pattern;
     while (true) {
         if (*cur_pattern == '\0')