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Cygwin: Add initial support for SOURCE_DATE_EPOCH

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If specified, set version timestamp to this value.
Enable deterministic archives for ar and ranlib.
Set cygwin1.dll PE and export table header timestamps to zero.

Signed-off-by: Christian Franke <christian.franke@t-online.de>
This commit is contained in:
Christian Franke 2023-09-05 18:32:49 +02:00 committed by Jon Turney
parent 5bbe0e56c6
commit f5e37b93a0
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GPG Key ID: C7C86F0370285C81
4 changed files with 18 additions and 4 deletions
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6
winsup/cygwin/Makefile.am
View File

@ -572,6 +572,10 @@ toollib_DATA = \
libgmon_a_SOURCES = $(GMON_FILES) libgmon_a_SOURCES = $(GMON_FILES)
libgmon_a_LIBADD = libgmon_a_LIBADD =
# Enable deterministic archives for reproducible builds.
ARFLAGS = cr$${SOURCE_DATE_EPOCH:+D}
override RANLIB := $(RANLIB)$${SOURCE_DATE_EPOCH:+ -D}
# cygserver library # cygserver library
cygserver_blddir = ${target_builddir}/winsup/cygserver cygserver_blddir = ${target_builddir}/winsup/cygserver
LIBSERVER = $(cygserver_blddir)/libcygserver.a LIBSERVER = $(cygserver_blddir)/libcygserver.a
@ -589,12 +593,14 @@ $(LDSCRIPT): $(LDSCRIPT).in
$(AM_V_GEN)$(CC) -E - -P < $^ -o $@ $(AM_V_GEN)$(CC) -E - -P < $^ -o $@
# cygwin dll # cygwin dll
# Set PE and export table header timestamps to zero for reproducible builds.
$(NEW_DLL_NAME): $(LDSCRIPT) libdll.a $(VERSION_OFILES) $(LIBSERVER)\ $(NEW_DLL_NAME): $(LDSCRIPT) libdll.a $(VERSION_OFILES) $(LIBSERVER)\
$(newlib_build)/libm.a $(newlib_build)/libc.a $(newlib_build)/libm.a $(newlib_build)/libc.a
$(AM_V_CXXLD)$(CXX) $(CXXFLAGS) \ $(AM_V_CXXLD)$(CXX) $(CXXFLAGS) \
-mno-use-libstdc-wrappers \ -mno-use-libstdc-wrappers \
-Wl,--gc-sections -nostdlib -Wl,-T$(LDSCRIPT) \ -Wl,--gc-sections -nostdlib -Wl,-T$(LDSCRIPT) \
-Wl,--dynamicbase -static \ -Wl,--dynamicbase -static \
$${SOURCE_DATE_EPOCH:+-Wl,--no-insert-timestamp} \
-Wl,--heap=0 -Wl,--out-implib,cygdll.a -shared -o $@ \ -Wl,--heap=0 -Wl,--out-implib,cygdll.a -shared -o $@ \
-e @DLL_ENTRY@ $(DEF_FILE) \ -e @DLL_ENTRY@ $(DEF_FILE) \
-Wl,-whole-archive libdll.a -Wl,-no-whole-archive \ -Wl,-whole-archive libdll.a -Wl,-no-whole-archive \

6
winsup/cygwin/scripts/mkimport
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@ -92,8 +92,12 @@ for my $f (keys %text) {
} }
} }
# Enable deterministic archives for reproducible builds.
my $opts = 'crs';
$opts .= 'D' if ($ENV{'SOURCE_DATE_EPOCH'} != '');
unlink $libdll; unlink $libdll;
system $ar, 'crus', $libdll, glob('*.o'), @ARGV; system $ar, $opts, $libdll, glob('*.o'), @ARGV;
unlink glob('*.o'); unlink glob('*.o');
exit 1 if $?; exit 1 if $?;

4
winsup/cygwin/scripts/mkvers.sh
View File

@ -56,9 +56,9 @@ parse_preproc_flags $CC
# #
# Load the current date so we can work on individual fields # Load the current date (or SOURCE_DATE_EPOCH) so we can work on individual fields
# #
set -$- $(date -u +"%m %d %Y %H:%M") set -$- $(date ${SOURCE_DATE_EPOCH:+-d @}${SOURCE_DATE_EPOCH} -u +"%m %d %Y %H:%M")
m=$1 d=$2 y=$3 hhmm=$4 m=$1 d=$2 y=$3 hhmm=$4
# #
# Set date into YYYY-MM-DD HH:MM:SS format # Set date into YYYY-MM-DD HH:MM:SS format

6
winsup/cygwin/scripts/speclib
View File

@ -74,7 +74,11 @@ EOF
close $as_fd or exit 1; close $as_fd or exit 1;
system $objcopy, '-j', '.idata$7', $iname_o; system $objcopy, '-j', '.idata$7', $iname_o;
$res = system $ar, 'crus', $lib, sort keys %extract; # Enable deterministic archives for reproducible builds.
my $opts = 'crs';
$opts .= 'D' if ($ENV{'SOURCE_DATE_EPOCH'} != '');
$res = system $ar, $opts, $lib, sort keys %extract;
unlink keys %extract; unlink keys %extract;
die "$0: ar creation of $lib exited with non-zero status\n" if $res; die "$0: ar creation of $lib exited with non-zero status\n" if $res;
exit 0; exit 0;