Source: gcc-13
Version: 13.1.0-2
Severity: normal
Tags: patch
User: reproducible-bui...@lists.alioth.debian.org
Usertags: timestamps
X-Debbugs-Cc: reproducible-b...@lists.alioth.debian.org

The build dates and timestamps are embedded in various files shipped in
documentation.

The attached patches fix this by adding SOURCE_DATE_EPOCH support to the
doxygen scripts used to generate the libstdc++ documentation, and by
adjusting debian/rules2 to remove the leftover _formulas.log files from
the generated package.

According to my local tests, applying these patches should allow gcc-13
to build reproducibly with stable build paths and
DEB_BUILD_OPTIONS="nocheck nolto nopgo".


Thanks for maintaining gcc-13!


live well,
  vagrant
From 41780dfa54abbc7a1d6a1acd744d725b3799eb50 Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagr...@reproducible-builds.org>
Date: Sun, 30 Apr 2023 14:37:31 -0700
Subject: [PATCH 1/2] Patch libstdc++ to support SOURCE_DATE_EPOCH in
 documentation.

https://reproducible-builds.org/docs/source-date-epoch/
---
 ...ripts-run_doxygen-support-SOURCE_DATE_EPOCH.diff | 13 +++++++++++++
 debian/rules.patch                                  |  1 +
 2 files changed, 14 insertions(+)
 create mode 100644 debian/patches/libstdc++-scripts-run_doxygen-support-SOURCE_DATE_EPOCH.diff

diff --git a/debian/patches/libstdc++-scripts-run_doxygen-support-SOURCE_DATE_EPOCH.diff b/debian/patches/libstdc++-scripts-run_doxygen-support-SOURCE_DATE_EPOCH.diff
new file mode 100644
index 0000000..1636c08
--- /dev/null
+++ b/debian/patches/libstdc++-scripts-run_doxygen-support-SOURCE_DATE_EPOCH.diff
@@ -0,0 +1,13 @@
+--- gcc-13.1.0/src/libstdc++-v3/scripts/run_doxygen	2023-04-26 00:09:43.000000000 -0700
++++ gcc-13.1.0/src/libstdc++-v3/scripts/run_doxygen.new	2023-04-30 14:34:47.513318389 -0700
+@@ -130,7 +130,9 @@
+ latex_cmd=
+ enabled_sections=
+ generate_tagfile=
+-DATEtext=`date '+%Y-%m-%d'`
++DATE_FMT="+%Y-%m-%d"
++SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:-$(date +%s)}"
++DATEtext=`date -u -d "@$SOURCE_DATE_EPOCH" "$DATE_FMT" 2>/dev/null || date -u -r "$SOURCE_DATE_EPOCH" "$DATE_FMT" 2>/dev/null || date -u "$DATE_FMT"`
+ 
+ # Show how this script is called.
+ echo run_doxygen $*
diff --git a/debian/rules.patch b/debian/rules.patch
index 89ecbe2..274514d 100644
--- a/debian/rules.patch
+++ b/debian/rules.patch
@@ -39,6 +39,7 @@ debian_patches += \
 	libstdc++-doclink \
 	libstdc++-man-3cxx \
 	libstdc++-test-installed \
+	libstdc++-scripts-run_doxygen-support-SOURCE_DATE_EPOCH \
 	alpha-no-ev4-directive \
 	note-gnu-stack \
 	libgomp-omp_h-multilib \
-- 
2.39.2

From cd27050d2ff32b1ce1f065d8e7ee0c6abffbf8d5 Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagr...@reproducible-builds.org>
Date: Sun, 30 Apr 2023 14:38:34 -0700
Subject: [PATCH 2/2] debian/rules2: Remove _formulas.log files.

These files are artifacts from the documentation creation process and
may embed build dates.
---
 debian/rules2 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/debian/rules2 b/debian/rules2
index 1b431e2..43c077f 100644
--- a/debian/rules2
+++ b/debian/rules2
@@ -2930,6 +2930,7 @@ debian/indep_binaries.all: $(foreach i,$(indep_binaries),$(binary_stamp)-$(i))
 	cat debian/indep_binaries debian/indep_binaries.epoch > debian/indep_binaries.all
 
 binary-indep: $(foreach i,$(indep_binaries),$(binary_stamp)-$(i)) debian/indep_binaries.all
+	find debian -name _formulas.log -delete -print
 	dh_compress $(foreach p,$(shell echo `cat debian/indep_binaries.all`),-p$(p)) \
 	  -X.log.xz -X.sum.xz -X.c -X.txt -X.tag -X.map -XREADME.Bugs
 	dh_fixperms $(foreach p,$(shell echo `cat debian/indep_binaries.all`),-p$(p))
-- 
2.39.2

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