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File reproducible.patch of Package xmgrace
PATCH-FIX-UPSTREAM -- ToDo Author: Bernhard M. Wiedemann <bwiedemann@suse.de> Date: Thu May 4 13:15:15 2017 +0200 Allow to override the build date using the SOURCE_DATE_EPOCH env var to make package 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 use gmtime instead of localtime to not be dependent on locale Index: grace-5.1.25/src/buildinfo.c =================================================================== --- grace-5.1.25.orig/src/buildinfo.c +++ grace-5.1.25/src/buildinfo.c @@ -52,6 +52,7 @@ static void VersionInfo(FILE *outfile) struct utsname u_info; time_t time_info; char *ctime_string; + char *source_date_epoch; fprintf(outfile, "#define BI_VERSION_ID %d\n", MAJOR_REV*10000 + MINOR_REV*100 + PATCHLEVEL); @@ -104,8 +105,9 @@ static void VersionInfo(FILE *outfile) fprintf(outfile, "#define BI_SYSTEM \"%s %s %s %s\"\n", u_info.sysname, u_info.version, u_info.release, u_info.machine); - time_info = time(NULL); - ctime_string = ctime(&time_info); + if ((source_date_epoch = getenv("SOURCE_DATE_EPOCH")) == NULL || (time_info = (time_t)strtol(source_date_epoch, NULL, 10)) <= 0) + time_info = time(NULL); + ctime_string = asctime(gmtime(&time_info)); if (ctime_string[strlen(ctime_string) - 1] == '\n') { ctime_string[strlen(ctime_string) - 1] = '\0'; }
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