mirror of
git://git.sv.gnu.org/emacs.git
synced 2025-12-28 16:21:07 -08:00
79f15092b9
This incorporates:
2018-05-21 crypto: omit stream ops Emacs doesn’t need
2018-05-13 truncate: Fix compilation error on Android
2018-05-13 imaxdiv: Fix compilation error on Android
2018-05-13 Support selective inclusion of recent mingw.org headers
2018-05-13 Add cross-compilation guesses for Linux systems sans glibc
2018-05-13 stdioext: Fix compilation errors with newer Android headers
2018-05-07 af_alg: Pacify --enable-gcc-warnings
2018-05-06 af_alg: Fix bug with streams that are not at position 0
2018-05-06 Followup to 'af_alg: New module'
2018-05-05 crypto/{md5,sha1,sha256,sha512}: simplify
2018-05-05 af_alg: New module
2018-05-05 af_alg: Improve function signature
2018-04-28 md5sum: Use AF_ALG when available
2018-04-28 sha512sum: Use AF_ALG when available
2018-04-28 sha256sum: Use AF_ALG when available
2018-04-28 sha1sum: Use AF_ALG when available
2018-05-05 all: Replace more http URLs by https URLs
2018-05-03 maint: port more modules to GCC 8
2018-05-03 Simplify code; drop support for Borland C++ on Windows
* admin/merge-gnulib (GNULIB_MODULES): Use crypto/md5-buffer
rather than crypto/md5, since Emacs doesn’t use the stream
operations that in recent Gnulib pull in other stuff Emacs doesn’t
need. Similarly for crypto/sha1-buffer, crypto/sha256-buffer,
crypto/sha512-buffer.
* build-aux/config.guess, build-aux/config.sub, lib/dosname.h:
* lib/dup2.c, lib/errno.in.h, lib/euidaccess.c, lib/fcntl.c:
* lib/fcntl.in.h, lib/fpending.c, lib/fsync.c, lib/getdtablesize.c:
* lib/getopt.c, lib/gettimeofday.c, lib/inttypes.in.h, lib/md5.c:
* lib/md5.h, lib/open.c, lib/pipe2.c, lib/putenv.c, lib/sha1.c:
* lib/sha1.h, lib/sha256.c, lib/sha256.h, lib/sha512.c:
* lib/sha512.h, lib/stat-time.h, lib/stdio-impl.h, lib/stdio.in.h:
* lib/stdlib.in.h, lib/sys_stat.in.h, lib/sys_types.in.h:
* lib/timespec.h, lib/unistd.in.h, lib/utimens.c, m4/c-strtod.m4:
* m4/gnulib-common.m4, m4/inttypes.m4, m4/lstat.m4, m4/nocrash.m4:
* m4/pselect.m4, m4/readlink.m4, m4/stdio_h.m4, m4/symlink.m4:
* m4/unistd_h.m4, m4/utimens.m4:
Copy from Gnulib.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.
73 lines
2.6 KiB
Text
73 lines
2.6 KiB
Text
# readlink.m4 serial 14
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dnl Copyright (C) 2003, 2007, 2009-2018 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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AC_DEFUN([gl_FUNC_READLINK],
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[
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AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CHECK_FUNCS_ONCE([readlink])
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if test $ac_cv_func_readlink = no; then
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HAVE_READLINK=0
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else
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AC_CACHE_CHECK([whether readlink signature is correct],
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[gl_cv_decl_readlink_works],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <unistd.h>
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/* Cause compilation failure if original declaration has wrong type. */
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ssize_t readlink (const char *, char *, size_t);]])],
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[gl_cv_decl_readlink_works=yes], [gl_cv_decl_readlink_works=no])])
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dnl Solaris 9 ignores trailing slash.
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dnl FreeBSD 7.2 dereferences only one level of links with trailing slash.
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AC_CACHE_CHECK([whether readlink handles trailing slash correctly],
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[gl_cv_func_readlink_works],
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[# We have readlink, so assume ln -s works.
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ln -s conftest.no-such conftest.link
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ln -s conftest.link conftest.lnk2
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AC_RUN_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <unistd.h>
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]], [[char buf[20];
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return readlink ("conftest.lnk2/", buf, sizeof buf) != -1;]])],
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[gl_cv_func_readlink_works=yes], [gl_cv_func_readlink_works=no],
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[case "$host_os" in
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# Guess yes on Linux systems.
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linux-* | linux) gl_cv_func_readlink_works="guessing yes" ;;
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# Guess yes on glibc systems.
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*-gnu* | gnu*) gl_cv_func_readlink_works="guessing yes" ;;
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# If we don't know, assume the worst.
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*) gl_cv_func_readlink_works="guessing no" ;;
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esac
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])
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rm -f conftest.link conftest.lnk2])
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case "$gl_cv_func_readlink_works" in
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*yes)
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if test "$gl_cv_decl_readlink_works" != yes; then
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REPLACE_READLINK=1
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fi
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;;
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*)
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AC_DEFINE([READLINK_TRAILING_SLASH_BUG], [1], [Define to 1 if readlink
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fails to recognize a trailing slash.])
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REPLACE_READLINK=1
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;;
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esac
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fi
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])
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# Like gl_FUNC_READLINK, except prepare for separate compilation
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# (no REPLACE_READLINK, no AC_LIBOBJ).
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AC_DEFUN([gl_FUNC_READLINK_SEPARATE],
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[
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AC_CHECK_FUNCS_ONCE([readlink])
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gl_PREREQ_READLINK
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])
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# Prerequisites of lib/readlink.c.
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AC_DEFUN([gl_PREREQ_READLINK],
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[
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:
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])
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