Notes for gmp - reproducible builds result

Version annotated: 2:6.1.2+dfsg-1
Identified issues:
Identifier: build_path_captured_in_assembly_objects
URL https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93371
Description This is issue has been fixed for GCC 13 on 2022-11-02.
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Before GNU as didn't support BUILD_PATH_PREFIX_MAP, so objects compiled from
assembly sources captured the build path.
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Before GNU "as" only supported --debug-prefix-map=BUILDPATH=. which can
sometimes be passed via ASMFLAGS, ASFLAGS, or similar variables.
Identifier: captures_build_path_via_assert
Description Absolute paths to source file names are embedded through assert(), which
embeds the value of the __FILE__ macro in the .data section, or via
filenames in debug symbols, which shows in the .text and .debug_str sections.
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We have a pending patch to GCC to fix this in one central place.
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https://gcc.gnu.org/ml/gcc-patches/2016-11/msg00182.html
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If/when this is accepted, this issue should be fixed for all packages and
you should not need to fix it specifically in your package.
.
For more background information see:
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• https://alioth-lists.debian.net/pipermail/reproducible-builds/Week-of-Mon-20160822/006788.html
• https://alioth-lists.debian.net/pipermail/reproducible-builds/Week-of-Mon-20160905/006984.html
• https://alioth-lists.debian.net/pipermail/reproducible-builds/Week-of-Mon-20160912/007076.html
Identifier: records_build_flags
Description Records $CFLAGS, which vary intentionally due to the «-fdebug-prefix-map=${BUILDPATH}=.»,
«-ffile-prefix-map=${BUILDPATH}=.» or «-fmacro-prefix-map=${BUILDPATH}=.» flags.
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We have a patch pending to GCC to fix this issue centrally:
.
https://gcc.gnu.org/ml/gcc-patches/2016-11/msg00182.html
.
Though the patch is currently unlikely to be merged. If/when this
is accepted, this issue should be fixed for all packages and you
should not need to fix it specifically in your package.
.
There is also a work-in-progress patch to dpkg that could address this issue:
.
https://bugs.debian.org/985553
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For more background information see:
.
• https://alioth-lists.debian.net/pipermail/reproducible-builds/Week-of-Mon-20160822/006788.html
• https://alioth-lists.debian.net/pipermail/reproducible-builds/Week-of-Mon-20160905/006984.html
• https://alioth-lists.debian.net/pipermail/reproducible-builds/Week-of-Mon-20160912/007076.html
 

Our notes about issues affecting packages are stored in notes.git and are targeted at packages in Debian in 'unstable/amd64' (unless they say otherwise).