File gnulib-port-year2038-to-glibc-2.34.patch of Package findutils

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File gnulib-port-year2038-to-glibc-2.34.patch of Package findutils (Revision c79fcce502caa6cf94719ab79895b11f)

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Upstream gnulib patches regarding the 'year2038' module.

Port the gnulib module year2038 to glibc-2.34.

Avoid the following build error regarding 64-bit time_t on i586 with glibc-2.34:

[  166s] checking for 64-bit time_t... no
[  166s] configure: error: in `/home/abuild/rpmbuild/BUILD/findutils-4.8.0':
[  166s] configure: error: This package requires a 64-bit 'time_t' type, which your system appears to support. You might try configuring with 'CPPFLAGS="-m64" LDFLAGS="-m64"'. To build with a 32-bit time_t anyway (not recommended), configure with 'TIME_T_32_BIT_OK=yes'.

This patch squashes the M4 changes (no doc etc.) of the following upstream
gnulib commits related to the 'year2038' module:

* https://git.sv.gnu.org/cgit/gnulib.git/commit/?id=dc09dc088848
* https://git.sv.gnu.org/cgit/gnulib.git/commit/?id=7dd2562058aa
* https://git.sv.gnu.org/cgit/gnulib.git/commit/?id=784f55e5c59a
* https://git.sv.gnu.org/cgit/gnulib.git/commit/?id=7c6538cf0584
* https://git.sv.gnu.org/cgit/gnulib.git/commit/?id=edb4fbdc9596

This patch changes m4 files in gnulib and therefore requires
'autoreconf -fi' to be run.
---
 gl/m4/largefile.m4 |   28 ++-
 gl/m4/year2038.m4  |  106 +++++++++++---
 4 files changed, 440 insertions(+), 76 deletions(-)

Index: gl/m4/year2038.m4
===================================================================
--- gl/m4/year2038.m4.orig
+++ gl/m4/year2038.m4
@@ -1,11 +1,11 @@
-# year2038.m4 serial 3
+# year2038.m4 serial 7
 dnl Copyright (C) 2017-2021 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 
-dnl Attempt to ensure that 'time_t' is a 64-bit type
-dnl and that the functions time(), stat(), etc. return 64-bit times.
+dnl Attempt to ensure that 'time_t' can go past the year 2038 and that
+dnl the functions 'time', 'stat', etc. work with post-2038 timestamps.
 
 AC_DEFUN([gl_YEAR2038_EARLY],
 [
@@ -18,13 +18,31 @@ AC_DEFUN([gl_YEAR2038_EARLY],
   esac
 ])
 
-AC_DEFUN([gl_YEAR2038],
+# gl_YEAR2038_TEST_INCLUDES
+# -------------------------
+AC_DEFUN([gl_YEAR2038_TEST_INCLUDES],
+[[
+  #include <time.h>
+  /* Check that time_t can represent 2**32 - 1 correctly.  */
+  #define LARGE_TIME_T \\
+    ((time_t) (((time_t) 1 << 30) - 1 + 3 * ((time_t) 1 << 30)))
+  int verify_time_t_range[(LARGE_TIME_T / 65537 == 65535
+                           && LARGE_TIME_T % 65537 == 0)
+                          ? 1 : -1];
+]])
+
+# gl_YEAR2038_BODY(REQUIRE-YEAR2038-SAFE)
+-----------------------------------------
+AC_DEFUN([gl_YEAR2038_BODY],
 [
+ AC_ARG_ENABLE([year2038],
+   [  --disable-year2038      omit support for timestamps past the year 2038])
+ AS_IF([test "$enable_year2038" != no],
+ [
   dnl On many systems, time_t is already a 64-bit type.
   dnl On those systems where time_t is still 32-bit, it requires kernel
-  dnl and libc support to make it 64-bit. For glibc on Linux/x86, this
-  dnl is work in progress; see
-  dnl <https://sourceware.org/glibc/wiki/Y2038ProofnessDesign>.
+  dnl and libc support to make it 64-bit. For glibc 2.34 and later on Linux,
+  dnl defining _TIME_BITS=64 and _FILE_OFFSET_BITS=64 is needed on x86 and ARM.
   dnl
   dnl On native Windows, the system include files define types __time32_t
   dnl and __time64_t. By default, time_t is an alias of
@@ -34,16 +52,31 @@ AC_DEFUN([gl_YEAR2038],
   dnl alias of __time64_t.
   dnl And when compiling with -D_USE_32BIT_TIME_T, time_t is an alias of
   dnl __time32_t.
-  AC_CACHE_CHECK([for 64-bit time_t], [gl_cv_type_time_t_64],
+  AC_CACHE_CHECK([for time_t past the year 2038], [gl_cv_type_time_t_y2038],
     [AC_COMPILE_IFELSE(
-       [AC_LANG_PROGRAM(
-          [[#include <time.h>
-            int verify_time_t_size[sizeof (time_t) >= 8 ? 1 : -1];
-          ]],
-          [[]])],
-       [gl_cv_type_time_t_64=yes], [gl_cv_type_time_t_64=no])
+       [AC_LANG_SOURCE([gl_YEAR2038_TEST_INCLUDES])],
+       [gl_cv_type_time_t_y2038=yes], [gl_cv_type_time_t_y2038=no])
     ])
-  if test $gl_cv_type_time_t_64 = no; then
+  if test "$gl_cv_type_time_t_y2038" = no; then
+    AC_CACHE_CHECK([for 64-bit time_t with _TIME_BITS=64],
+      [gl_cv_type_time_t_bits_macro],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_SOURCE([[#define _TIME_BITS 64
+                           #define _FILE_OFFSET_BITS 64
+                           ]gl_YEAR2038_TEST_INCLUDES])],
+         [gl_cv_type_time_t_bits_macro=yes],
+         [gl_cv_type_time_t_bits_macro=no])
+      ])
+    if test "$gl_cv_type_time_t_bits_macro" = yes; then
+      AC_DEFINE([_TIME_BITS], [64],
+        [Number of bits in a timestamp, on hosts where this is settable.])
+      dnl AC_SYS_LARGFILE also defines this; it's OK if we do too.
+      AC_DEFINE([_FILE_OFFSET_BITS], [64],
+        [Number of bits in a file offset, on hosts where this is settable.])
+      gl_cv_type_time_t_y2038=yes
+    fi
+  fi
+  if test $gl_cv_type_time_t_y2038 = no; then
     AC_COMPILE_IFELSE(
       [AC_LANG_SOURCE(
          [[#ifdef _USE_32BIT_TIME_T
@@ -52,19 +85,40 @@ AC_DEFUN([gl_YEAR2038],
              error fail
            #endif
          ]])],
-      [AC_MSG_FAILURE([This package requires a 64-bit 'time_t' type. Remove _USE_32BIT_TIME_T from the compiler flags.])],
-      [# If TIME_T_32_BIT_OK is "no" (the default) and not cross-compiling
-       # and 'touch' works with a large timestamp, then evidently 64-bit time_t
+      [AC_MSG_FAILURE(
+         [The 'time_t' type stops working after January 2038.
+          Remove _USE_32BIT_TIME_T from the compiler flags.])],
+      [# If not cross-compiling and $1 says we should check,
+       # and 'touch' works with a large timestamp, then evidently wider time_t
        # is desired and supported, so fail and ask the builder to fix the
        # problem.  Otherwise, just warn the builder.
-       if test "${TIME_T_32_BIT_OK-no}" = no \
-          && test $cross_compiling = no \
-          && TZ=UTC0 touch -t 210602070628.16 conftest.time 2>/dev/null; then
-         rm -f conftest.time
-         AC_MSG_FAILURE([This package requires a 64-bit 'time_t' type, which your system appears to support. You might try configuring with 'CPPFLAGS="-m64" LDFLAGS="-m64"'. To build with a 32-bit time_t anyway (not recommended), configure with 'TIME_T_32_BIT_OK=yes'.])
-       else
-         AC_MSG_WARN([This package requires a 64-bit 'time_t' type if there is any way to access timestamps outside the year range 1901-2038 on your platform. Perhaps you should configure with 'CPPFLAGS="-m64" LDFLAGS="-m64"'?])
+       m4_ifval([$1],
+         [if test $cross_compiling = no \
+             && TZ=UTC0 touch -t 210602070628.15 conftest.time 2>/dev/null; then
+            case `TZ=UTC0 LC_ALL=C ls -l conftest.time 2>/dev/null` in
+              *'Feb  7  2106'* | *'Feb  7 17:10'*)
+                AC_MSG_FAILURE(
+                  [The 'time_t' type stops working after January 2038,
+                   and your system appears to support a wider 'time_t'.
+                   Try configuring with 'CC="${CC} -m64"'.
+                   To build with a 32-bit time_t anyway (not recommended),
+                   configure with '--disable-year2038'.]);;
+            esac
+            rm -f conftest.time
+          fi])
+       if test "$gl_warned_about_y2038" != yes; then
+         AC_MSG_WARN(
+           [The 'time_t' type stops working after January 2038,
+            and this package needs a wider 'time_t' type
+            if there is any way to access timestamps after that.
+            Configure with 'CC="${CC} -m64"' perhaps?])
+         gl_warned_about_y2038=yes
        fi
       ])
-  fi
+  fi])
+])
+
+AC_DEFUN([gl_YEAR2038],
+[
+  gl_YEAR2038_BODY([require-year2038-safe])
 ])
Index: gl/m4/largefile.m4
===================================================================
--- gl/m4/largefile.m4.orig
+++ gl/m4/largefile.m4
@@ -22,7 +22,8 @@ AC_DEFUN([gl_SET_LARGEFILE_SOURCE],
   esac
 ])
 
-# The following implementation works around a problem in autoconf <= 2.69;
+# Work around a problem in Autoconf through at least 2.71 on glibc 2.34+
+# with _TIME_BITS.  Also, work around a problem in autoconf <= 2.69:
 # AC_SYS_LARGEFILE does not configure for large inodes on Mac OS X 10.5,
 # or configures them incorrectly in some cases.
 m4_version_prereq([2.70], [], [
@@ -40,6 +41,7 @@ m4_define([_AC_SYS_LARGEFILE_TEST_INCLUD
                        && LARGE_OFF_T % 2147483647 == 1)
                       ? 1 : -1]];[]dnl
 ])
+])# m4_version_prereq 2.70
 
 
 # _AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE,
@@ -54,7 +56,8 @@ m4_define([_AC_SYS_LARGEFILE_MACRO_VALUE
     [AC_LANG_PROGRAM([$5], [$6])],
     [$3=no; break])
   m4_ifval([$6], [AC_LINK_IFELSE], [AC_COMPILE_IFELSE])(
-    [AC_LANG_PROGRAM([#define $1 $2
+    [AC_LANG_PROGRAM([#undef $1
+#define $1 $2
 $5], [$6])],
     [$3=$2; break])
   $3=unknown
@@ -80,9 +83,8 @@ rm -rf conftest*[]dnl
 AC_DEFUN([AC_SYS_LARGEFILE],
 [AC_ARG_ENABLE(largefile,
                [  --disable-largefile     omit support for large files])
-if test "$enable_largefile" != no; then
-
-  AC_CACHE_CHECK([for special C compiler options needed for large files],
+AS_IF([test "$enable_largefile" != no],
+ [AC_CACHE_CHECK([for special C compiler options needed for large files],
     ac_cv_sys_largefile_CC,
     [ac_cv_sys_largefile_CC=no
      if test "$GCC" != yes; then
@@ -107,15 +109,15 @@ if test "$enable_largefile" != no; then
     ac_cv_sys_file_offset_bits,
     [Number of bits in a file offset, on hosts where this is settable.],
     [_AC_SYS_LARGEFILE_TEST_INCLUDES])
-  if test $ac_cv_sys_file_offset_bits = unknown; then
-    _AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1,
-      ac_cv_sys_large_files,
-      [Define for large files, on AIX-style hosts.],
-      [_AC_SYS_LARGEFILE_TEST_INCLUDES])
-  fi
-fi
+  AS_CASE([$ac_cv_sys_file_offset_bits],
+    [unknown],
+      [_AC_SYS_LARGEFILE_MACRO_VALUE([_LARGE_FILES], [1],
+         [ac_cv_sys_large_files],
+         [Define for large files, on AIX-style hosts.],
+         [_AC_SYS_LARGEFILE_TEST_INCLUDES])],
+    [64],
+      [gl_YEAR2038_BODY([])])])
 ])# AC_SYS_LARGEFILE
-])# m4_version_prereq 2.70
 
 # Enable large files on systems where this is implemented by Gnulib, not by the
 # system headers.

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File gnulib-port-year2038-to-glibc-2.34.patch of Package findutils (Revision c79fcce502caa6cf94719ab79895b11f)

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