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[libc++] Remap headers in the debug info when building the library #143004

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Jun 9, 2025
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[libc++] Remap headers in the debug info when building the library #143004

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5 changes: 5 additions & 0 deletions libcxx/include/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -1706,6 +1706,11 @@ add_dependencies(cxx-headers generate-cxx-headers)
target_include_directories(cxx-headers INTERFACE ${LIBCXX_GENERATED_INCLUDE_TARGET_DIR}
${LIBCXX_GENERATED_INCLUDE_DIR})

# Make sure to map the generated include directory back to libc++'s actual source directory when generating
# debug information. Otherwise, the debug information will refer to generated headers which are created during
# the build and generally not persistent.
target_add_compile_flags_if_supported(cxx-headers INTERFACE "-fdebug-prefix-map=${LIBCXX_GENERATED_INCLUDE_DIR}=${LIBCXX_SOURCE_DIR}/include")

if (LIBCXX_INSTALL_HEADERS)
foreach(file ${files})
get_filename_component(dir ${file} DIRECTORY)
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