forked from pool/findutils
242 lines
10 KiB
Diff
242 lines
10 KiB
Diff
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Upstream gnulib patches regarding the 'year2038' module.
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Port the gnulib module year2038 to glibc-2.34.
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Avoid the following build error regarding 64-bit time_t on i586 with glibc-2.34:
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[ 166s] checking for 64-bit time_t... no
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[ 166s] configure: error: in `/home/abuild/rpmbuild/BUILD/findutils-4.8.0':
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[ 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'.
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This patch squashes the M4 changes (no doc etc.) of the following upstream
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gnulib commits related to the 'year2038' module:
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* https://git.sv.gnu.org/cgit/gnulib.git/commit/?id=dc09dc088848
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* https://git.sv.gnu.org/cgit/gnulib.git/commit/?id=7dd2562058aa
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* https://git.sv.gnu.org/cgit/gnulib.git/commit/?id=784f55e5c59a
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* https://git.sv.gnu.org/cgit/gnulib.git/commit/?id=7c6538cf0584
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* https://git.sv.gnu.org/cgit/gnulib.git/commit/?id=edb4fbdc9596
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This patch changes m4 files in gnulib and therefore requires
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'autoreconf -fi' to be run.
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---
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gl/m4/largefile.m4 | 28 ++-
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gl/m4/year2038.m4 | 106 +++++++++++---
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4 files changed, 440 insertions(+), 76 deletions(-)
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Index: gl/m4/year2038.m4
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===================================================================
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--- gl/m4/year2038.m4.orig
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+++ gl/m4/year2038.m4
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@@ -1,11 +1,11 @@
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-# year2038.m4 serial 3
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+# year2038.m4 serial 7
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dnl Copyright (C) 2017-2021 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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-dnl Attempt to ensure that 'time_t' is a 64-bit type
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-dnl and that the functions time(), stat(), etc. return 64-bit times.
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+dnl Attempt to ensure that 'time_t' can go past the year 2038 and that
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+dnl the functions 'time', 'stat', etc. work with post-2038 timestamps.
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AC_DEFUN([gl_YEAR2038_EARLY],
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[
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@@ -18,13 +18,31 @@ AC_DEFUN([gl_YEAR2038_EARLY],
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esac
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])
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-AC_DEFUN([gl_YEAR2038],
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+# gl_YEAR2038_TEST_INCLUDES
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+# -------------------------
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+AC_DEFUN([gl_YEAR2038_TEST_INCLUDES],
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+[[
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+ #include <time.h>
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+ /* Check that time_t can represent 2**32 - 1 correctly. */
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+ #define LARGE_TIME_T \\
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+ ((time_t) (((time_t) 1 << 30) - 1 + 3 * ((time_t) 1 << 30)))
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+ int verify_time_t_range[(LARGE_TIME_T / 65537 == 65535
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+ && LARGE_TIME_T % 65537 == 0)
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+ ? 1 : -1];
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+]])
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+
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+# gl_YEAR2038_BODY(REQUIRE-YEAR2038-SAFE)
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+-----------------------------------------
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+AC_DEFUN([gl_YEAR2038_BODY],
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[
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+ AC_ARG_ENABLE([year2038],
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+ [ --disable-year2038 omit support for timestamps past the year 2038])
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+ AS_IF([test "$enable_year2038" != no],
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+ [
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dnl On many systems, time_t is already a 64-bit type.
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dnl On those systems where time_t is still 32-bit, it requires kernel
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- dnl and libc support to make it 64-bit. For glibc on Linux/x86, this
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- dnl is work in progress; see
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- dnl <https://sourceware.org/glibc/wiki/Y2038ProofnessDesign>.
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+ dnl and libc support to make it 64-bit. For glibc 2.34 and later on Linux,
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+ dnl defining _TIME_BITS=64 and _FILE_OFFSET_BITS=64 is needed on x86 and ARM.
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dnl
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dnl On native Windows, the system include files define types __time32_t
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dnl and __time64_t. By default, time_t is an alias of
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@@ -34,16 +52,31 @@ AC_DEFUN([gl_YEAR2038],
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dnl alias of __time64_t.
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dnl And when compiling with -D_USE_32BIT_TIME_T, time_t is an alias of
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dnl __time32_t.
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- AC_CACHE_CHECK([for 64-bit time_t], [gl_cv_type_time_t_64],
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+ AC_CACHE_CHECK([for time_t past the year 2038], [gl_cv_type_time_t_y2038],
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[AC_COMPILE_IFELSE(
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- [AC_LANG_PROGRAM(
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- [[#include <time.h>
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- int verify_time_t_size[sizeof (time_t) >= 8 ? 1 : -1];
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- ]],
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- [[]])],
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- [gl_cv_type_time_t_64=yes], [gl_cv_type_time_t_64=no])
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+ [AC_LANG_SOURCE([gl_YEAR2038_TEST_INCLUDES])],
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+ [gl_cv_type_time_t_y2038=yes], [gl_cv_type_time_t_y2038=no])
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])
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- if test $gl_cv_type_time_t_64 = no; then
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+ if test "$gl_cv_type_time_t_y2038" = no; then
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+ AC_CACHE_CHECK([for 64-bit time_t with _TIME_BITS=64],
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+ [gl_cv_type_time_t_bits_macro],
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+ [AC_COMPILE_IFELSE(
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+ [AC_LANG_SOURCE([[#define _TIME_BITS 64
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+ #define _FILE_OFFSET_BITS 64
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+ ]gl_YEAR2038_TEST_INCLUDES])],
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+ [gl_cv_type_time_t_bits_macro=yes],
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+ [gl_cv_type_time_t_bits_macro=no])
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+ ])
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+ if test "$gl_cv_type_time_t_bits_macro" = yes; then
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+ AC_DEFINE([_TIME_BITS], [64],
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+ [Number of bits in a timestamp, on hosts where this is settable.])
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+ dnl AC_SYS_LARGFILE also defines this; it's OK if we do too.
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+ AC_DEFINE([_FILE_OFFSET_BITS], [64],
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+ [Number of bits in a file offset, on hosts where this is settable.])
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+ gl_cv_type_time_t_y2038=yes
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+ fi
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+ fi
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+ if test $gl_cv_type_time_t_y2038 = no; then
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AC_COMPILE_IFELSE(
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[AC_LANG_SOURCE(
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[[#ifdef _USE_32BIT_TIME_T
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@@ -52,19 +85,40 @@ AC_DEFUN([gl_YEAR2038],
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error fail
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#endif
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]])],
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- [AC_MSG_FAILURE([This package requires a 64-bit 'time_t' type. Remove _USE_32BIT_TIME_T from the compiler flags.])],
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- [# If TIME_T_32_BIT_OK is "no" (the default) and not cross-compiling
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- # and 'touch' works with a large timestamp, then evidently 64-bit time_t
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+ [AC_MSG_FAILURE(
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+ [The 'time_t' type stops working after January 2038.
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+ Remove _USE_32BIT_TIME_T from the compiler flags.])],
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+ [# If not cross-compiling and $1 says we should check,
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+ # and 'touch' works with a large timestamp, then evidently wider time_t
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# is desired and supported, so fail and ask the builder to fix the
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# problem. Otherwise, just warn the builder.
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- if test "${TIME_T_32_BIT_OK-no}" = no \
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- && test $cross_compiling = no \
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- && TZ=UTC0 touch -t 210602070628.16 conftest.time 2>/dev/null; then
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- rm -f conftest.time
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- 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'.])
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- else
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- 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"'?])
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+ m4_ifval([$1],
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+ [if test $cross_compiling = no \
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+ && TZ=UTC0 touch -t 210602070628.15 conftest.time 2>/dev/null; then
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+ case `TZ=UTC0 LC_ALL=C ls -l conftest.time 2>/dev/null` in
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+ *'Feb 7 2106'* | *'Feb 7 17:10'*)
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+ AC_MSG_FAILURE(
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+ [The 'time_t' type stops working after January 2038,
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+ and your system appears to support a wider 'time_t'.
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+ Try configuring with 'CC="${CC} -m64"'.
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+ To build with a 32-bit time_t anyway (not recommended),
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+ configure with '--disable-year2038'.]);;
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+ esac
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+ rm -f conftest.time
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+ fi])
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+ if test "$gl_warned_about_y2038" != yes; then
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+ AC_MSG_WARN(
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+ [The 'time_t' type stops working after January 2038,
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+ and this package needs a wider 'time_t' type
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+ if there is any way to access timestamps after that.
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+ Configure with 'CC="${CC} -m64"' perhaps?])
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+ gl_warned_about_y2038=yes
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fi
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])
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- fi
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+ fi])
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+])
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+
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+AC_DEFUN([gl_YEAR2038],
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+[
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+ gl_YEAR2038_BODY([require-year2038-safe])
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])
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Index: gl/m4/largefile.m4
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===================================================================
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--- gl/m4/largefile.m4.orig
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+++ gl/m4/largefile.m4
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@@ -22,7 +22,8 @@ AC_DEFUN([gl_SET_LARGEFILE_SOURCE],
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esac
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])
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-# The following implementation works around a problem in autoconf <= 2.69;
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+# Work around a problem in Autoconf through at least 2.71 on glibc 2.34+
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+# with _TIME_BITS. Also, work around a problem in autoconf <= 2.69:
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# AC_SYS_LARGEFILE does not configure for large inodes on Mac OS X 10.5,
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# or configures them incorrectly in some cases.
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m4_version_prereq([2.70], [], [
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@@ -40,6 +41,7 @@ m4_define([_AC_SYS_LARGEFILE_TEST_INCLUD
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&& LARGE_OFF_T % 2147483647 == 1)
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? 1 : -1]];[]dnl
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])
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+])# m4_version_prereq 2.70
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# _AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE,
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@@ -54,7 +56,8 @@ m4_define([_AC_SYS_LARGEFILE_MACRO_VALUE
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[AC_LANG_PROGRAM([$5], [$6])],
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[$3=no; break])
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m4_ifval([$6], [AC_LINK_IFELSE], [AC_COMPILE_IFELSE])(
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- [AC_LANG_PROGRAM([#define $1 $2
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+ [AC_LANG_PROGRAM([#undef $1
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+#define $1 $2
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$5], [$6])],
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[$3=$2; break])
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$3=unknown
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@@ -80,9 +83,8 @@ rm -rf conftest*[]dnl
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AC_DEFUN([AC_SYS_LARGEFILE],
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[AC_ARG_ENABLE(largefile,
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[ --disable-largefile omit support for large files])
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-if test "$enable_largefile" != no; then
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-
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- AC_CACHE_CHECK([for special C compiler options needed for large files],
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+AS_IF([test "$enable_largefile" != no],
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+ [AC_CACHE_CHECK([for special C compiler options needed for large files],
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ac_cv_sys_largefile_CC,
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[ac_cv_sys_largefile_CC=no
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if test "$GCC" != yes; then
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@@ -107,15 +109,15 @@ if test "$enable_largefile" != no; then
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ac_cv_sys_file_offset_bits,
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[Number of bits in a file offset, on hosts where this is settable.],
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[_AC_SYS_LARGEFILE_TEST_INCLUDES])
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- if test $ac_cv_sys_file_offset_bits = unknown; then
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- _AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1,
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- ac_cv_sys_large_files,
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- [Define for large files, on AIX-style hosts.],
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- [_AC_SYS_LARGEFILE_TEST_INCLUDES])
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- fi
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-fi
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+ AS_CASE([$ac_cv_sys_file_offset_bits],
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+ [unknown],
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+ [_AC_SYS_LARGEFILE_MACRO_VALUE([_LARGE_FILES], [1],
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+ [ac_cv_sys_large_files],
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+ [Define for large files, on AIX-style hosts.],
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+ [_AC_SYS_LARGEFILE_TEST_INCLUDES])],
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+ [64],
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+ [gl_YEAR2038_BODY([])])])
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])# AC_SYS_LARGEFILE
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-])# m4_version_prereq 2.70
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# Enable large files on systems where this is implemented by Gnulib, not by the
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# system headers.
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