diff options
Diffstat (limited to 'gnu')
| -rw-r--r-- | gnu/local.mk | 2 | ||||
| -rw-r--r-- | gnu/packages/gcc.scm | 4 | ||||
| -rw-r--r-- | gnu/packages/patches/gcc-5-source-date-epoch-1.patch | 190 | ||||
| -rw-r--r-- | gnu/packages/patches/gcc-5-source-date-epoch-2.patch | 353 |
4 files changed, 548 insertions, 1 deletions
diff --git a/gnu/local.mk b/gnu/local.mk index d1efdbdf66..ca14a85577 100644 --- a/gnu/local.mk +++ b/gnu/local.mk @@ -561,6 +561,8 @@ dist_patch_DATA = \ %D%/packages/patches/gcc-strmov-store-file-names.patch \ %D%/packages/patches/gcc-4.9.3-mingw-gthr-default.patch \ %D%/packages/patches/gcc-5.0-libvtv-runpath.patch \ + %D%/packages/patches/gcc-5-source-date-epoch-1.patch \ + %D%/packages/patches/gcc-5-source-date-epoch-2.patch \ %D%/packages/patches/gcc-6-arm-none-eabi-multilib.patch \ %D%/packages/patches/gcc-6-cross-environment-variables.patch \ %D%/packages/patches/gcj-arm-mode.patch \ diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm index 0cdef6dec9..075642ebd1 100644 --- a/gnu/packages/gcc.scm +++ b/gnu/packages/gcc.scm @@ -376,7 +376,9 @@ Go. It also includes runtime support libraries for these languages.") "0fihlcy5hnksdxk0sn6bvgnyq8gfrgs8m794b1jxwd1dxinzg3b0")) (patches (search-patches "gcc-arm-bug-71399.patch" "gcc-strmov-store-file-names.patch" - "gcc-5.0-libvtv-runpath.patch")))))) + "gcc-5.0-libvtv-runpath.patch" + "gcc-5-source-date-epoch-1.patch" + "gcc-5-source-date-epoch-2.patch")))))) (define-public gcc-6 (package diff --git a/gnu/packages/patches/gcc-5-source-date-epoch-1.patch b/gnu/packages/patches/gcc-5-source-date-epoch-1.patch new file mode 100644 index 0000000000..8c94a026b3 --- /dev/null +++ b/gnu/packages/patches/gcc-5-source-date-epoch-1.patch @@ -0,0 +1,190 @@ +Make GCC respect SOURCE_DATE_EPOCH in __DATE__ and __TIME__ macros. + +Patch adapted from upstream source repository: + +https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=e3e8c48c4a494d9da741c1c8ea6c4c0b7c4ff934 + +From e3e8c48c4a494d9da741c1c8ea6c4c0b7c4ff934 Mon Sep 17 00:00:00 2001 +From: doko <doko@138bc75d-0d04-0410-961f-82ee72b054a4> +Date: Thu, 28 Apr 2016 09:12:05 +0000 +Subject: [PATCH] gcc/c-family/ChangeLog: + +diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c +index 1bf5d080034..6f0898a38d7 100644 +--- a/gcc/c-family/c-common.c ++++ b/gcc/c-family/c-common.c +@@ -12318,4 +12318,37 @@ pointer_to_zero_sized_aggr_p (tree t) + return (TYPE_SIZE (t) && integer_zerop (TYPE_SIZE (t))); + } + ++/* Read SOURCE_DATE_EPOCH from environment to have a deterministic ++ timestamp to replace embedded current dates to get reproducible ++ results. Returns -1 if SOURCE_DATE_EPOCH is not defined. */ ++time_t ++get_source_date_epoch () ++{ ++ char *source_date_epoch; ++ long long epoch; ++ char *endptr; ++ ++ source_date_epoch = getenv ("SOURCE_DATE_EPOCH"); ++ if (!source_date_epoch) ++ return (time_t) -1; ++ ++ errno = 0; ++ epoch = strtoll (source_date_epoch, &endptr, 10); ++ if ((errno == ERANGE && (epoch == LLONG_MAX || epoch == LLONG_MIN)) ++ || (errno != 0 && epoch == 0)) ++ fatal_error (UNKNOWN_LOCATION, "environment variable $SOURCE_DATE_EPOCH: " ++ "strtoll: %s\n", xstrerror(errno)); ++ if (endptr == source_date_epoch) ++ fatal_error (UNKNOWN_LOCATION, "environment variable $SOURCE_DATE_EPOCH: " ++ "no digits were found: %s\n", endptr); ++ if (*endptr != '\0') ++ fatal_error (UNKNOWN_LOCATION, "environment variable $SOURCE_DATE_EPOCH: " ++ "trailing garbage: %s\n", endptr); ++ if (epoch < 0) ++ fatal_error (UNKNOWN_LOCATION, "environment variable $SOURCE_DATE_EPOCH: " ++ "value must be nonnegative: %lld \n", epoch); ++ ++ return (time_t) epoch; ++} ++ + #include "gt-c-family-c-common.h" +diff --git a/gcc/c-family/c-common.h b/gcc/c-family/c-common.h +index fdb227f85c3..ba0a5d7df50 100644 +--- a/gcc/c-family/c-common.h ++++ b/gcc/c-family/c-common.h +@@ -1437,4 +1437,10 @@ extern bool contains_cilk_spawn_stmt (tree); + extern tree cilk_for_number_of_iterations (tree); + extern bool check_no_cilk (tree, const char *, const char *, + location_t loc = UNKNOWN_LOCATION); ++ ++/* Read SOURCE_DATE_EPOCH from environment to have a deterministic ++ timestamp to replace embedded current dates to get reproducible ++ results. Returns -1 if SOURCE_DATE_EPOCH is not defined. */ ++extern time_t get_source_date_epoch (void); ++ + #endif /* ! GCC_C_COMMON_H */ +diff --git a/gcc/c-family/c-lex.c b/gcc/c-family/c-lex.c +index bb55be8063e..e68471b9d2b 100644 +--- a/gcc/c-family/c-lex.c ++++ b/gcc/c-family/c-lex.c +@@ -402,6 +402,9 @@ c_lex_with_flags (tree *value, location_t *loc, unsigned char *cpp_flags, + enum cpp_ttype type; + unsigned char add_flags = 0; + enum overflow_type overflow = OT_NONE; ++ time_t source_date_epoch = get_source_date_epoch (); ++ ++ cpp_init_source_date_epoch (parse_in, source_date_epoch); + + timevar_push (TV_CPP); + retry: +diff --git a/gcc/doc/cppenv.texi b/gcc/doc/cppenv.texi +index 100811dc637..3b5317beb53 100644 +--- a/gcc/doc/cppenv.texi ++++ b/gcc/doc/cppenv.texi +@@ -79,4 +79,21 @@ main input file is omitted. + @ifclear cppmanual + @xref{Preprocessor Options}. + @end ifclear ++ ++@item SOURCE_DATE_EPOCH ++ ++If this variable is set, its value specifies a UNIX timestamp to be ++used in replacement of the current date and time in the @code{__DATE__} ++and @code{__TIME__} macros, so that the embedded timestamps become ++reproducible. ++ ++The value of @env{SOURCE_DATE_EPOCH} must be a UNIX timestamp, ++defined as the number of seconds (excluding leap seconds) since ++01 Jan 1970 00:00:00 represented in ASCII, identical to the output of ++@samp{@command{date +%s}}. ++ ++The value should be a known timestamp such as the last modification ++time of the source or package and it should be set by the build ++process. ++ + @end vtable +diff --git a/libcpp/include/cpplib.h b/libcpp/include/cpplib.h +index 1b731d1a3ad..7a5481219be 100644 +--- a/libcpp/include/cpplib.h ++++ b/libcpp/include/cpplib.h +@@ -775,6 +775,9 @@ extern void cpp_init_special_builtins (cpp_reader *); + /* Set up built-ins like __FILE__. */ + extern void cpp_init_builtins (cpp_reader *, int); + ++/* Initialize the source_date_epoch value. */ ++extern void cpp_init_source_date_epoch (cpp_reader *, time_t); ++ + /* This is called after options have been parsed, and partially + processed. */ + extern void cpp_post_options (cpp_reader *); +diff --git a/libcpp/init.c b/libcpp/init.c +index 45a4d13ffa3..a8d00f4628b 100644 +--- a/libcpp/init.c ++++ b/libcpp/init.c +@@ -530,6 +530,13 @@ cpp_init_builtins (cpp_reader *pfile, int hosted) + _cpp_define_builtin (pfile, "__OBJC__ 1"); + } + ++/* Initialize the source_date_epoch value. */ ++void ++cpp_init_source_date_epoch (cpp_reader *pfile, time_t source_date_epoch) ++{ ++ pfile->source_date_epoch = source_date_epoch; ++} ++ + /* Sanity-checks are dependent on command-line options, so it is + called as a subroutine of cpp_read_main_file (). */ + #if ENABLE_CHECKING +diff --git a/libcpp/internal.h b/libcpp/internal.h +index c2d08168945..8507eba1747 100644 +--- a/libcpp/internal.h ++++ b/libcpp/internal.h +@@ -502,6 +502,10 @@ struct cpp_reader + const unsigned char *date; + const unsigned char *time; + ++ /* Externally set timestamp to replace current date and time useful for ++ reproducibility. */ ++ time_t source_date_epoch; ++ + /* EOF token, and a token forcing paste avoidance. */ + cpp_token avoid_paste; + cpp_token eof; +diff --git a/libcpp/macro.c b/libcpp/macro.c +index eb32a6f8c98..3f3b278e97d 100644 +--- a/libcpp/macro.c ++++ b/libcpp/macro.c +@@ -350,13 +350,20 @@ _cpp_builtin_macro_text (cpp_reader *pfile, cpp_hashnode *node) + time_t tt; + struct tm *tb = NULL; + +- /* (time_t) -1 is a legitimate value for "number of seconds +- since the Epoch", so we have to do a little dance to +- distinguish that from a genuine error. */ +- errno = 0; +- tt = time(NULL); +- if (tt != (time_t)-1 || errno == 0) +- tb = localtime (&tt); ++ /* Set a reproducible timestamp for __DATE__ and __TIME__ macro ++ usage if SOURCE_DATE_EPOCH is defined. */ ++ if (pfile->source_date_epoch != (time_t) -1) ++ tb = gmtime (&pfile->source_date_epoch); ++ else ++ { ++ /* (time_t) -1 is a legitimate value for "number of seconds ++ since the Epoch", so we have to do a little dance to ++ distinguish that from a genuine error. */ ++ errno = 0; ++ tt = time (NULL); ++ if (tt != (time_t)-1 || errno == 0) ++ tb = localtime (&tt); ++ } + + if (tb) + { +-- +2.11.0 + diff --git a/gnu/packages/patches/gcc-5-source-date-epoch-2.patch b/gnu/packages/patches/gcc-5-source-date-epoch-2.patch new file mode 100644 index 0000000000..ed2580679a --- /dev/null +++ b/gnu/packages/patches/gcc-5-source-date-epoch-2.patch @@ -0,0 +1,353 @@ +Continuation of the SOURCE_DATE_EPOCH patch. + +Patch adapted from upstream source repository: + +https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=dfa5c0d3f3e23e4fdb14857a42de376d9ff8601c + +From dfa5c0d3f3e23e4fdb14857a42de376d9ff8601c Mon Sep 17 00:00:00 2001 +From: doko <doko@138bc75d-0d04-0410-961f-82ee72b054a4> +Date: Wed, 1 Jun 2016 16:42:41 +0000 +Subject: [PATCH] gcc/c-family/ChangeLog: + +diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c +index 6f0898a38d7..efbc78ef218 100644 +--- a/gcc/c-family/c-common.c ++++ b/gcc/c-family/c-common.c +@@ -12321,8 +12321,9 @@ pointer_to_zero_sized_aggr_p (tree t) + /* Read SOURCE_DATE_EPOCH from environment to have a deterministic + timestamp to replace embedded current dates to get reproducible + results. Returns -1 if SOURCE_DATE_EPOCH is not defined. */ ++ + time_t +-get_source_date_epoch () ++cb_get_source_date_epoch (cpp_reader *pfile ATTRIBUTE_UNUSED) + { + char *source_date_epoch; + long long epoch; +@@ -12334,19 +12335,14 @@ get_source_date_epoch () + + errno = 0; + epoch = strtoll (source_date_epoch, &endptr, 10); +- if ((errno == ERANGE && (epoch == LLONG_MAX || epoch == LLONG_MIN)) +- || (errno != 0 && epoch == 0)) +- fatal_error (UNKNOWN_LOCATION, "environment variable $SOURCE_DATE_EPOCH: " +- "strtoll: %s\n", xstrerror(errno)); +- if (endptr == source_date_epoch) +- fatal_error (UNKNOWN_LOCATION, "environment variable $SOURCE_DATE_EPOCH: " +- "no digits were found: %s\n", endptr); +- if (*endptr != '\0') +- fatal_error (UNKNOWN_LOCATION, "environment variable $SOURCE_DATE_EPOCH: " +- "trailing garbage: %s\n", endptr); +- if (epoch < 0) +- fatal_error (UNKNOWN_LOCATION, "environment variable $SOURCE_DATE_EPOCH: " +- "value must be nonnegative: %lld \n", epoch); ++ if (errno != 0 || endptr == source_date_epoch || *endptr != '\0' ++ || epoch < 0 || epoch > MAX_SOURCE_DATE_EPOCH) ++ { ++ error_at (input_location, "environment variable SOURCE_DATE_EPOCH must " ++ "expand to a non-negative integer less than or equal to %wd", ++ MAX_SOURCE_DATE_EPOCH); ++ return (time_t) -1; ++ } + + return (time_t) epoch; + } +diff --git a/gcc/c-family/c-common.h b/gcc/c-family/c-common.h +index ba0a5d7df50..977ae9df5ea 100644 +--- a/gcc/c-family/c-common.h ++++ b/gcc/c-family/c-common.h +@@ -1063,6 +1063,16 @@ extern vec<tree, va_gc> *make_tree_vector_copy (const vec<tree, va_gc> *); + c_register_builtin_type. */ + extern GTY(()) tree registered_builtin_types; + ++/* Read SOURCE_DATE_EPOCH from environment to have a deterministic ++ timestamp to replace embedded current dates to get reproducible ++ results. Returns -1 if SOURCE_DATE_EPOCH is not defined. */ ++extern time_t cb_get_source_date_epoch (cpp_reader *pfile); ++ ++/* The value (as a unix timestamp) corresponds to date ++ "Dec 31 9999 23:59:59 UTC", which is the latest date that __DATE__ and ++ __TIME__ can store. */ ++#define MAX_SOURCE_DATE_EPOCH HOST_WIDE_INT_C (253402300799) ++ + /* In c-gimplify.c */ + extern void c_genericize (tree); + extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *); +@@ -1438,9 +1448,4 @@ extern tree cilk_for_number_of_iterations (tree); + extern bool check_no_cilk (tree, const char *, const char *, + location_t loc = UNKNOWN_LOCATION); + +-/* Read SOURCE_DATE_EPOCH from environment to have a deterministic +- timestamp to replace embedded current dates to get reproducible +- results. Returns -1 if SOURCE_DATE_EPOCH is not defined. */ +-extern time_t get_source_date_epoch (void); +- + #endif /* ! GCC_C_COMMON_H */ +diff --git a/gcc/c-family/c-lex.c b/gcc/c-family/c-lex.c +index e68471b9d2b..3f78073f640 100644 +--- a/gcc/c-family/c-lex.c ++++ b/gcc/c-family/c-lex.c +@@ -97,6 +97,7 @@ init_c_lex (void) + cb->valid_pch = c_common_valid_pch; + cb->read_pch = c_common_read_pch; + cb->has_attribute = c_common_has_attribute; ++ cb->get_source_date_epoch = cb_get_source_date_epoch; + + /* Set the debug callbacks if we can use them. */ + if ((debug_info_level == DINFO_LEVEL_VERBOSE +@@ -402,9 +403,6 @@ c_lex_with_flags (tree *value, location_t *loc, unsigned char *cpp_flags, + enum cpp_ttype type; + unsigned char add_flags = 0; + enum overflow_type overflow = OT_NONE; +- time_t source_date_epoch = get_source_date_epoch (); +- +- cpp_init_source_date_epoch (parse_in, source_date_epoch); + + timevar_push (TV_CPP); + retry: +diff --git a/gcc/doc/cppenv.texi b/gcc/doc/cppenv.texi +index 3b5317beb53..7b4cf6adc11 100644 +--- a/gcc/doc/cppenv.texi ++++ b/gcc/doc/cppenv.texi +@@ -81,7 +81,6 @@ main input file is omitted. + @end ifclear + + @item SOURCE_DATE_EPOCH +- + If this variable is set, its value specifies a UNIX timestamp to be + used in replacement of the current date and time in the @code{__DATE__} + and @code{__TIME__} macros, so that the embedded timestamps become +@@ -89,8 +88,9 @@ reproducible. + + The value of @env{SOURCE_DATE_EPOCH} must be a UNIX timestamp, + defined as the number of seconds (excluding leap seconds) since +-01 Jan 1970 00:00:00 represented in ASCII, identical to the output of +-@samp{@command{date +%s}}. ++01 Jan 1970 00:00:00 represented in ASCII; identical to the output of ++@samp{@command{date +%s}} on GNU/Linux and other systems that support the ++@code{%s} extension in the @code{date} command. + + The value should be a known timestamp such as the last modification + time of the source or package and it should be set by the build +diff --git a/gcc/gcc.c b/gcc/gcc.c +index d956c36b151..2709f295734 100644 +--- a/gcc/gcc.c ++++ b/gcc/gcc.c +@@ -3328,6 +3328,29 @@ save_switch (const char *opt, size_t n_args, const char *const *args, + n_switches++; + } + ++/* Set the SOURCE_DATE_EPOCH environment variable to the current time if it is ++ not set already. */ ++ ++static void ++set_source_date_epoch_envvar () ++{ ++ /* Array size is 21 = ceil(log_10(2^64)) + 1 to hold string representations ++ of 64 bit integers. */ ++ char source_date_epoch[21]; ++ time_t tt; ++ ++ errno = 0; ++ tt = time (NULL); ++ if (tt < (time_t) 0 || errno != 0) ++ tt = (time_t) 0; ++ ++ snprintf (source_date_epoch, 21, "%llu", (unsigned long long) tt); ++ /* Using setenv instead of xputenv because we want the variable to remain ++ after finalizing so that it's still set in the second run when using ++ -fcompare-debug. */ ++ setenv ("SOURCE_DATE_EPOCH", source_date_epoch, 0); ++} ++ + /* Handle an option DECODED that is unknown to the option-processing + machinery. */ + +@@ -3628,6 +3651,7 @@ driver_handle_option (struct gcc_options *opts, + else + compare_debug_opt = arg; + save_switch (compare_debug_replacement_opt, 0, NULL, validated, true); ++ set_source_date_epoch_envvar (); + return true; + + case OPT_fdiagnostics_color_: +diff --git a/gcc/testsuite/gcc.dg/cpp/source_date_epoch-1.c b/gcc/testsuite/gcc.dg/cpp/source_date_epoch-1.c +new file mode 100644 +index 00000000000..f6aa1a360ff +--- /dev/null ++++ b/gcc/testsuite/gcc.dg/cpp/source_date_epoch-1.c +@@ -0,0 +1,11 @@ ++/* { dg-do run } */ ++/* { dg-set-compiler-env-var SOURCE_DATE_EPOCH "630333296" } */ ++ ++int ++main(void) ++{ ++ __builtin_printf ("%s %s\n", __DATE__, __TIME__); ++ return 0; ++} ++ ++/* { dg-output "^Dec 22 1989 12:34:56\n$" } */ +diff --git a/gcc/testsuite/gcc.dg/cpp/source_date_epoch-2.c b/gcc/testsuite/gcc.dg/cpp/source_date_epoch-2.c +new file mode 100644 +index 00000000000..ae18362ae87 +--- /dev/null ++++ b/gcc/testsuite/gcc.dg/cpp/source_date_epoch-2.c +@@ -0,0 +1,12 @@ ++/* { dg-do compile } */ ++/* { dg-set-compiler-env-var SOURCE_DATE_EPOCH "AAA" } */ ++ ++/* Make sure that SOURCE_DATE_EPOCH is only parsed once */ ++ ++int ++main(void) ++{ ++ __builtin_printf ("%s %s\n", __DATE__, __TIME__); /* { dg-error "SOURCE_DATE_EPOCH must expand" } */ ++ __builtin_printf ("%s %s\n", __DATE__, __TIME__); ++ return 0; ++} +diff --git a/gcc/testsuite/lib/gcc-dg.exp b/gcc/testsuite/lib/gcc-dg.exp +index 4fa433d9954..7656b2254a1 100644 +--- a/gcc/testsuite/lib/gcc-dg.exp ++++ b/gcc/testsuite/lib/gcc-dg.exp +@@ -324,6 +324,38 @@ proc restore-target-env-var { } { + } + } + ++proc dg-set-compiler-env-var { args } { ++ global set_compiler_env_var ++ global saved_compiler_env_var ++ if { [llength $args] != 3 } { ++ error "dg-set-compiler-env-var: need two arguments" ++ return ++ } ++ set var [lindex $args 1] ++ set value [lindex $args 2] ++ if [info exists ::env($var)] { ++ lappend saved_compiler_env_var [list $var 1 $::env($var)] ++ } else { ++ lappend saved_compiler_env_var [list $var 0] ++ } ++ setenv $var $value ++ lappend set_compiler_env_var [list $var $value] ++} ++ ++proc restore-compiler-env-var { } { ++ global saved_compiler_env_var ++ for { set env_vari [llength $saved_compiler_env_var] } { ++ [incr env_vari -1] >= 0 } {} { ++ set env_var [lindex $saved_compiler_env_var $env_vari] ++ set var [lindex $env_var 0] ++ if [lindex $env_var 1] { ++ setenv $var [lindex $env_var 2] ++ } else { ++ unsetenv $var ++ } ++ } ++} ++ + # Utility routines. + + # +@@ -785,6 +817,11 @@ if { [info procs saved-dg-test] == [list] } { + if [info exists set_target_env_var] { + unset set_target_env_var + } ++ if [info exists set_compiler_env_var] { ++ restore-compiler-env-var ++ unset set_compiler_env_var ++ unset saved_compiler_env_var ++ } + unset_timeout_vars + if [info exists compiler_conditional_xfail_data] { + unset compiler_conditional_xfail_data +diff --git a/libcpp/include/cpplib.h b/libcpp/include/cpplib.h +index 7a5481219be..867aeebc39f 100644 +--- a/libcpp/include/cpplib.h ++++ b/libcpp/include/cpplib.h +@@ -585,6 +585,9 @@ struct cpp_callbacks + + /* Callback that can change a user builtin into normal macro. */ + bool (*user_builtin_macro) (cpp_reader *, cpp_hashnode *); ++ ++ /* Callback to parse SOURCE_DATE_EPOCH from environment. */ ++ time_t (*get_source_date_epoch) (cpp_reader *); + }; + + #ifdef VMS +@@ -775,9 +778,6 @@ extern void cpp_init_special_builtins (cpp_reader *); + /* Set up built-ins like __FILE__. */ + extern void cpp_init_builtins (cpp_reader *, int); + +-/* Initialize the source_date_epoch value. */ +-extern void cpp_init_source_date_epoch (cpp_reader *, time_t); +- + /* This is called after options have been parsed, and partially + processed. */ + extern void cpp_post_options (cpp_reader *); +diff --git a/libcpp/init.c b/libcpp/init.c +index a8d00f4628b..61c9bbbf945 100644 +--- a/libcpp/init.c ++++ b/libcpp/init.c +@@ -254,6 +254,9 @@ cpp_create_reader (enum c_lang lang, cpp_hash_table *table, + /* Do not force token locations by default. */ + pfile->forced_token_location_p = NULL; + ++ /* Initialize source_date_epoch to -2 (not yet set). */ ++ pfile->source_date_epoch = (time_t) -2; ++ + /* The expression parser stack. */ + _cpp_expand_op_stack (pfile); + +@@ -530,13 +533,6 @@ cpp_init_builtins (cpp_reader *pfile, int hosted) + _cpp_define_builtin (pfile, "__OBJC__ 1"); + } + +-/* Initialize the source_date_epoch value. */ +-void +-cpp_init_source_date_epoch (cpp_reader *pfile, time_t source_date_epoch) +-{ +- pfile->source_date_epoch = source_date_epoch; +-} +- + /* Sanity-checks are dependent on command-line options, so it is + called as a subroutine of cpp_read_main_file (). */ + #if ENABLE_CHECKING +diff --git a/libcpp/internal.h b/libcpp/internal.h +index 8507eba1747..226ae328e76 100644 +--- a/libcpp/internal.h ++++ b/libcpp/internal.h +@@ -503,7 +503,8 @@ struct cpp_reader + const unsigned char *time; + + /* Externally set timestamp to replace current date and time useful for +- reproducibility. */ ++ reproducibility. It should be initialized to -2 (not yet set) and ++ set to -1 to disable it or to a non-negative value to enable it. */ + time_t source_date_epoch; + + /* EOF token, and a token forcing paste avoidance. */ +diff --git a/libcpp/macro.c b/libcpp/macro.c +index 3f3b278e97d..756c7c6e0c6 100644 +--- a/libcpp/macro.c ++++ b/libcpp/macro.c +@@ -351,9 +351,13 @@ _cpp_builtin_macro_text (cpp_reader *pfile, cpp_hashnode *node) + struct tm *tb = NULL; + + /* Set a reproducible timestamp for __DATE__ and __TIME__ macro +- usage if SOURCE_DATE_EPOCH is defined. */ +- if (pfile->source_date_epoch != (time_t) -1) +- tb = gmtime (&pfile->source_date_epoch); ++ if SOURCE_DATE_EPOCH is defined. */ ++ if (pfile->source_date_epoch == (time_t) -2 ++ && pfile->cb.get_source_date_epoch != NULL) ++ pfile->source_date_epoch = pfile->cb.get_source_date_epoch (pfile); ++ ++ if (pfile->source_date_epoch >= (time_t) 0) ++ tb = gmtime (&pfile->source_date_epoch); + else + { + /* (time_t) -1 is a legitimate value for "number of seconds +-- +2.11.0 + |