[libc-commits] [libc] [libc] Implement lit-based test execution for Libc (PR #178746)

[Petr Hosek via libc-commits]

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@@ -0,0 +1,85 @@
+#===============================================================================
+# Lit Test Infrastructure for LLVM libc
+#
+# This module provides functions to set up lit-based testing for libc.
+#
+# Lit discovers and runs the test executables created by the
+# add_libc_test() infrastructure. No separate build rules are needed.
+#===============================================================================
+
+# Guard against double inclusion
+if(LIBC_LIT_TEST_RULES_INCLUDED)
+  return()
+endif()
+set(LIBC_LIT_TEST_RULES_INCLUDED TRUE)
+
+# Include LLVM's lit infrastructure
+include(AddLLVM)
+
+#-------------------------------------------------------------------------------
+# configure_libc_lit_site_cfg()
+#
+# Configures the lit.site.cfg.py file from its template.
+# This should be called once from libc/test/CMakeLists.txt.
+#-------------------------------------------------------------------------------
+function(configure_libc_lit_site_cfg)
+  # Set variables for the template
+  set(LIBC_SOURCE_DIR "${LIBC_SOURCE_DIR}")
+  set(LIBC_BINARY_DIR "${LIBC_BUILD_DIR}")
+  
+  # Configure the site config file
+  configure_lit_site_cfg(
+    ${LIBC_SOURCE_DIR}/test/lit.site.cfg.py.in
+    ${LIBC_BUILD_DIR}/test/lit.site.cfg.py
+    MAIN_CONFIG
+    ${LIBC_SOURCE_DIR}/test/lit.cfg.py
+    PATHS
+    "LLVM_SOURCE_DIR"
+    "LLVM_BINARY_DIR"
+    "LLVM_TOOLS_DIR"
+    "LLVM_LIBS_DIR"
+    "LIBC_SOURCE_DIR"
+    "LIBC_BINARY_DIR"
+  )
+endfunction()
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petrhosek wrote:

Is there any specific reason for not inlining this logic directly in `libc/test/CMakeLists.txt`?

https://github.com/llvm/llvm-project/pull/178746