[haochengxia]

What does this PR do?

cachesim fails to build with GCC 14 on glibc 2.37 or earlier, e.g. RHEL/Alma/Rocky 9
with gcc-toolset-14:

cache_init.h:76:9: error: implicit declaration of function 'strcasestr';
did you mean 'strcasecmp'? [-Wimplicit-function-declaration]

strcasestr is a GNU extension: glibc 2.37 and earlier declare it only under _GNU_SOURCE (2.38 moved it to the default set). _GNU_SOURCE takes effect only if it is defined before a file's first system header.

Type of change

• Bug fix
• New eviction / admission / prefetch algorithm
• New trace reader or trace format
• Performance improvement
• Documentation
• Build / CI
• Other:

How was it tested?

	develop	this PR
AlmaLinux 9 (glibc 2.34), GCC 14.2, aarch64	cachesim fails to build	builds; ctest 15/15
Arch (glibc 2.44), GCC 16, x86_64	builds	builds; testOracleTrace and testCLI pass

[chatgpt-codex-connector]

Codex Review Summary: ✅ Completed

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-11-08T00:56:14.632432Z	05c9564	PR opened

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