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build: Remove outdated comment about -ffile-prefix-map

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The -ffile-prefix-map option is no longer used and it seems fine to
remove the warning about it possibly breaking coverage builds.

If this needs documentation, the dev notes seem like a better place,
because it also affects other places, such as depends. C.f. commit
407062f2ac93624f350e9e8a4f641c882a2aaf2f

Github-Pull: #34413
Rebased-From: fa2e1b85dd6b263a77294566bd361d7873731045
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MarcoFalke 2026-01-26 17:17:05 +01:00 committed by fanquake
parent eda6c979bd
commit 4deda48fa4
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CMakeLists.txt
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@ -479,11 +479,6 @@ configure_file(contrib/filter-lcov.py filter-lcov.py USE_SOURCE_PERMISSIONS COPY
# Don't allow extended (non-ASCII) symbols in identifiers. This is easier for code review.
try_append_cxx_flags("-fno-extended-identifiers" TARGET core_interface SKIP_LINK)
# Avoiding the `-ffile-prefix-map` compiler option because it implies
# `-fcoverage-prefix-map` on Clang or `-fprofile-prefix-map` on GCC,
# which can cause issues with coverage builds, particularly when using
# Clang in the OSS-Fuzz environment due to its use of other options
# and a third party script, or with GCC.
# Set `-fmacro-prefix-map`, so that source file names are expanded without the
# src prefix.
try_append_cxx_flags("-fmacro-prefix-map=A=B" TARGET core_interface SKIP_LINK