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Commit 5f1a335ab66f1abcf6363bfe634913de09c665c8

Authored by Bernhard M. Wiedemann
1 parent 20286076
Exists in v5.2

Allow to override build date with SOURCE_DATE_EPOCH 

in order to make builds reproducible.
See https://reproducible-builds.org/ for why this is good
and https://reproducible-builds.org/specs/source-date-epoch/
for the definition of this variable.

Also switch to UTC to be independent of timezone.

Note: This date call is designed to work with different flavors
of date (GNU, BSD and others).
If only GNU (Linux) support is needed, the patch can be simplified.

This PR was done while working on reproducible builds for openSUSE.
Showing 1 changed file with 8 additions and 1 deletions   Show diff stats
src/libpw3270cpp/Makefile.in
  Diff comments   View file @5f1a335
... ... @@ -61,6 +61,13 @@ VALGRIND=@VALGRIND@
61 61 INSTALL_DATA=@INSTALL_DATA@
62 62 INSTALL_PROGRAM=@INSTALL_PROGRAM@
63 63  
  64 +DATE_FMT = +%Y%m%d
  65 +ifdef SOURCE_DATE_EPOCH
  66 + BUILD_DATE ?= $(shell date -u -d "@$(SOURCE_DATE_EPOCH)" "$(DATE_FMT)" 2>/dev/null || date -u -r "$(SOURCE_DATE_EPOCH)" "$(DATE_FMT)" 2>/dev/null || date -u "$(DATE_FMT)")
  67 +else
  68 + BUILD_DATE ?= $(shell date "$(DATE_FMT)")
  69 +endif
  70 +
64 71 CFLAGS= \
65 72 @CFLAGS@ \
66 73 -Wno-deprecated-declarations \
... ... @@ -102,7 +109,7 @@ $(OBJRLS)/%.o: \
102 109 @$(MKDIR) `dirname $@`
103 110 @$(CC) $(CFLAGS) \
104 111 @RLS_CFLAGS@ \
105   - -DBUILD_DATE=`date +"%Y%m%d"` \
  112 + -DBUILD_DATE=$(BUILD_DATE) \
106 113 -o $@ -c $<
107 114  
108 115 $(POTDIR)/%.pot: %.c
... ...