added configure option for reproducible builds (static values in BUILDDATE and BUILDSTR)

configure.ac

@@ -58,6 +58,7 @@ dnl	28-May-2017	tries	going for CentOS7 as development platform,
 dnl				lots of cleanup needed for autoconf (2.69),
 dnl				automake (1.13.4), libtool/libltdl (2.4.2)
 dnl	25-Aug-2020	tries	releae 0.8.3
+dnl	17-Feb-2022	tries	add option for reproducible builds
 dnl
 dnl
 
@@ -389,6 +390,23 @@ dnl    --with-custom-fwmodule
       AC_MSG_RESULT($FWLIBS), AC_MSG_RESULT(no))
 
 
+dnl
+dnl add
+dnl    --enable-reproducible-build
+   reproducible_build="no"
+   AC_MSG_CHECKING(whether to enable a reproducible build)
+   AC_ARG_ENABLE(reproducible-build,
+      [  --enable-reproducible-build
+                          enable reproducible build (default is no)],
+      [  if test "x$enableval" = "xyes"; then
+           reproducible_build="yes"
+           AC_MSG_RESULT(yes)
+         else
+           AC_MSG_RESULT(no)
+         fi
+      ], [AC_MSG_RESULT(no)])
+   AM_CONDITIONAL(REPRODUCIBLE_BUILD, test "x$reproducible_build" = "xyes")
+
 dnl
 dnl Checks for header files.
 dnl

src/Makefile.am

@@ -1,5 +1,5 @@
 #
-#    Copyright (C) 2002-2017  Thomas Ries <tries@gmx.net>
+#    Copyright (C) 2002-2022  Thomas Ries <tries@gmx.net>
 #
 #    This file is part of Siproxd.
 #    
@@ -19,10 +19,18 @@
 #
 
 
+if REPRODUCIBLE_BUILD
+BUILDDATE="\"unknown\""
+BUILDSTR="\"none\""
+else
+BUILDDATE="\"`date -u '+%Y-%m-%dT%H:%M:%S'`\""
+BUILDSTR="\"`cat .buildno`\""
+endif
+
 AM_CFLAGS = -D_GNU_SOURCE $(LTDLDEF) \
             -Werror-implicit-function-declaration \
-            -DBUILDSTR="\"`cat .buildno`\"" \
-            -DBUILDDATE="\"`date -u '+%Y-%m-%dT%H:%M:%S'`\""
+            -DBUILDSTR=$(BUILDSTR) \
+            -DBUILDDATE=$(BUILDDATE)
 #&&&INCLUDES = $(LTDLINCL)
 AM_CPPFLAGS = $(LTDLINCL)