mirror of
https://sourceware.org/git/binutils-gdb.git
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5df4cba632
This is mostly to get this commit from gnulib:
e22cd2677a4b7beacbf30b93bb0559f7b89f96ce
Add ‘extern "C"’ to count-one-bits.h etc.
... which fixes this compilation problem I observed with clang++:
CXXLD gdb
arch/arm-get-next-pcs.o:arm-get-next-pcs.c:function thumb_get_next_pcs_raw(arm_get_next_pcs*): error: undefined reference to 'count_one_bits(unsigned int)'
<more such undefined references>
I built-tested on GNU/Linux x86-64 (gcc-9 and clang-9) as well as with the
x86_64-w64-mingw32-gcc cross-compiler.
gnulib/ChangeLog:
* update-gnulib.sh (GNULIB_COMMIT_SHA1): Bump to
e22cd2677a4b7beacbf30b93bb0559f7b89f96ce.
* Makefile.in, config.in, configure, import/*: Re-generate.
256 lines
10 KiB
Plaintext
256 lines
10 KiB
Plaintext
# serial 32
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# Copyright (C) 2001, 2003, 2005-2006, 2009-2020 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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dnl From Volker Borchert.
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dnl Determine whether rename works for source file names with a trailing slash.
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dnl The rename from SunOS 4.1.1_U1 doesn't.
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dnl
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dnl If it doesn't, then define RENAME_TRAILING_SLASH_BUG and arrange
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dnl to compile the wrapper function.
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dnl
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AC_DEFUN([gl_FUNC_RENAME],
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[
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AC_REQUIRE([AC_CANONICAL_HOST])
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AC_REQUIRE([gl_STDIO_H_DEFAULTS])
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AC_CHECK_FUNCS_ONCE([lstat])
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dnl Solaris 11.3, AIX 7.1 mistakenly allow rename("file","name/").
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dnl NetBSD 1.6 mistakenly forbids rename("dir","name/").
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dnl FreeBSD 7.2 mistakenly allows rename("file","link-to-file/").
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dnl The Solaris bug can be worked around without stripping
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dnl trailing slash, while the NetBSD bug requires stripping;
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dnl the two conditions can be distinguished by whether hard
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dnl links are also broken.
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AC_CACHE_CHECK([whether rename honors trailing slash on destination],
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[gl_cv_func_rename_slash_dst_works],
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[rm -rf conftest.f conftest.f1 conftest.f2 conftest.d1 conftest.d2 conftest.lnk
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touch conftest.f && touch conftest.f1 && mkdir conftest.d1 ||
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AC_MSG_ERROR([cannot create temporary files])
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# Assume that if we have lstat, we can also check symlinks.
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if test $ac_cv_func_lstat = yes; then
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ln -s conftest.f conftest.lnk
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fi
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AC_RUN_IFELSE(
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[AC_LANG_PROGRAM([[
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# include <stdio.h>
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# include <stdlib.h>
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]],
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[[int result = 0;
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if (rename ("conftest.f1", "conftest.f2/") == 0)
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result |= 1;
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if (rename ("conftest.d1", "conftest.d2/") != 0)
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result |= 2;
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#if HAVE_LSTAT
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if (rename ("conftest.f", "conftest.lnk/") == 0)
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result |= 4;
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#endif
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return result;
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]])],
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[gl_cv_func_rename_slash_dst_works=yes],
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[gl_cv_func_rename_slash_dst_works=no],
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dnl When crosscompiling, assume rename is broken.
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[case "$host_os" in
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# Guess yes on Linux systems.
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linux-* | linux) gl_cv_func_rename_slash_dst_works="guessing yes" ;;
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# Guess yes on glibc systems.
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*-gnu*) gl_cv_func_rename_slash_dst_works="guessing yes" ;;
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# Guess no on native Windows.
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mingw*) gl_cv_func_rename_slash_dst_works="guessing no" ;;
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# If we don't know, obey --enable-cross-guesses.
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*) gl_cv_func_rename_slash_dst_works="$gl_cross_guess_normal" ;;
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esac
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])
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rm -rf conftest.f conftest.f1 conftest.f2 conftest.d1 conftest.d2 conftest.lnk
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])
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case "$gl_cv_func_rename_slash_dst_works" in
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*yes) ;;
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*)
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REPLACE_RENAME=1
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AC_DEFINE([RENAME_TRAILING_SLASH_DEST_BUG], [1],
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[Define if rename does not correctly handle slashes on the destination
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argument, such as on Solaris 11 or NetBSD 1.6.])
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;;
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esac
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dnl SunOS 4.1.1_U1 mistakenly forbids rename("dir/","name").
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dnl Solaris 9 mistakenly allows rename("file/","name").
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dnl FreeBSD 7.2 mistakenly allows rename("link-to-file/","name").
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dnl These bugs require stripping trailing slash to avoid corrupting
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dnl symlinks with a trailing slash.
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AC_CACHE_CHECK([whether rename honors trailing slash on source],
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[gl_cv_func_rename_slash_src_works],
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[rm -rf conftest.f conftest.f1 conftest.d1 conftest.d2 conftest.d3 conftest.lnk
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touch conftest.f && touch conftest.f1 && mkdir conftest.d1 ||
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AC_MSG_ERROR([cannot create temporary files])
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# Assume that if we have lstat, we can also check symlinks.
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if test $ac_cv_func_lstat = yes; then
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ln -s conftest.f conftest.lnk
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fi
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AC_RUN_IFELSE(
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[AC_LANG_PROGRAM([[
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# include <stdio.h>
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# include <stdlib.h>
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]],
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[[int result = 0;
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if (rename ("conftest.f1/", "conftest.d3") == 0)
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result |= 1;
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if (rename ("conftest.d1/", "conftest.d2") != 0)
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result |= 2;
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#if HAVE_LSTAT
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if (rename ("conftest.lnk/", "conftest.f") == 0)
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result |= 4;
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#endif
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return result;
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]])],
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[gl_cv_func_rename_slash_src_works=yes],
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[gl_cv_func_rename_slash_src_works=no],
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dnl When crosscompiling, assume rename is broken.
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[case "$host_os" in
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# Guess yes on Linux systems.
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linux-* | linux) gl_cv_func_rename_slash_src_works="guessing yes" ;;
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# Guess yes on glibc systems.
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*-gnu*) gl_cv_func_rename_slash_src_works="guessing yes" ;;
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# Guess yes on native Windows.
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mingw*) gl_cv_func_rename_slash_src_works="guessing yes" ;;
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# If we don't know, obey --enable-cross-guesses.
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*) gl_cv_func_rename_slash_src_works="$gl_cross_guess_normal" ;;
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esac
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])
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rm -rf conftest.f conftest.f1 conftest.d1 conftest.d2 conftest.d3 conftest.lnk
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])
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case "$gl_cv_func_rename_slash_src_works" in
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*yes) ;;
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*)
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REPLACE_RENAME=1
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AC_DEFINE([RENAME_TRAILING_SLASH_SOURCE_BUG], [1],
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[Define if rename does not correctly handle slashes on the source
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argument, such as on Solaris 9 or cygwin 1.5.])
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;;
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esac
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dnl NetBSD 1.6 and cygwin 1.5.x mistakenly reduce hard link count
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dnl on rename("h1","h2").
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dnl This bug requires stat'ting targets prior to attempting rename.
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AC_CHECK_FUNCS_ONCE([link])
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AC_CACHE_CHECK([whether rename manages hard links correctly],
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[gl_cv_func_rename_link_works],
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[if test $ac_cv_func_link = yes; then
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if test $cross_compiling != yes; then
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rm -rf conftest.f conftest.f1 conftest.f2
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if touch conftest.f conftest.f2 && ln conftest.f conftest.f1 &&
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set x `ls -i conftest.f conftest.f1` && test "$2" = "$4"; then
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AC_RUN_IFELSE(
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[AC_LANG_PROGRAM([[
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# include <errno.h>
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# include <stdio.h>
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# include <stdlib.h>
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# include <unistd.h>
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]],
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[[int result = 0;
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if (rename ("conftest.f", "conftest.f1"))
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result |= 1;
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if (unlink ("conftest.f1"))
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result |= 2;
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/* Allow either the POSIX-required behavior, where the
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previous rename kept conftest.f, or the (better) NetBSD
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behavior, where it removed conftest.f. */
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if (rename ("conftest.f", "conftest.f") != 0
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&& errno != ENOENT)
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result |= 4;
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if (rename ("conftest.f1", "conftest.f1") == 0)
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result |= 8;
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if (rename ("conftest.f2", "conftest.f2") != 0)
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result |= 16;
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return result;
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]])],
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[gl_cv_func_rename_link_works=yes],
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[gl_cv_func_rename_link_works=no],
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[dnl We don't get here.
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:
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])
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else
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gl_cv_func_rename_link_works="guessing no"
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fi
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rm -rf conftest.f conftest.f1 conftest.f2
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else
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dnl When crosscompiling, assume rename is broken.
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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_rename_link_works="guessing yes" ;;
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# Guess yes on glibc systems.
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*-gnu*) gl_cv_func_rename_link_works="guessing yes" ;;
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# Guess yes on native Windows.
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mingw*) gl_cv_func_rename_link_works="guessing yes" ;;
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# If we don't know, obey --enable-cross-guesses.
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*) gl_cv_func_rename_link_works="$gl_cross_guess_normal" ;;
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esac
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fi
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else
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gl_cv_func_rename_link_works=yes
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fi
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])
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case "$gl_cv_func_rename_link_works" in
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*yes) ;;
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*)
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REPLACE_RENAME=1
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AC_DEFINE([RENAME_HARD_LINK_BUG], [1],
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[Define if rename fails to leave hard links alone, as on NetBSD 1.6
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or Cygwin 1.5.])
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;;
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esac
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dnl Cygwin 1.5.x mistakenly allows rename("dir","file").
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dnl mingw mistakenly forbids rename("dir1","dir2").
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dnl These bugs require stripping trailing slash to avoid corrupting
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dnl symlinks with a trailing slash.
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AC_CACHE_CHECK([whether rename manages existing destinations correctly],
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[gl_cv_func_rename_dest_works],
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[rm -rf conftest.f conftest.d1 conftest.d2
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touch conftest.f && mkdir conftest.d1 conftest.d2 ||
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AC_MSG_ERROR([cannot create temporary files])
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AC_RUN_IFELSE(
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[AC_LANG_PROGRAM([[
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# include <stdio.h>
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# include <stdlib.h>
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]],
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[[int result = 0;
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if (rename ("conftest.d1", "conftest.d2") != 0)
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result |= 1;
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if (rename ("conftest.d2", "conftest.f") == 0)
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result |= 2;
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return result;
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]])],
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[gl_cv_func_rename_dest_works=yes],
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[gl_cv_func_rename_dest_works=no],
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dnl When crosscompiling, assume rename is broken.
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[case "$host_os" in
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# Guess yes on Linux systems.
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linux-* | linux) gl_cv_func_rename_dest_works="guessing yes" ;;
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# Guess yes on glibc systems.
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*-gnu*) gl_cv_func_rename_dest_works="guessing yes" ;;
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# Guess no on native Windows.
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mingw*) gl_cv_func_rename_dest_works="guessing no" ;;
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# If we don't know, obey --enable-cross-guesses.
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*) gl_cv_func_rename_dest_works="$gl_cross_guess_normal" ;;
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esac
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])
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rm -rf conftest.f conftest.d1 conftest.d2
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])
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case "$gl_cv_func_rename_dest_works" in
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*yes) ;;
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*)
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REPLACE_RENAME=1
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AC_DEFINE([RENAME_DEST_EXISTS_BUG], [1],
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[Define if rename does not work when the destination file exists,
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as on Cygwin 1.5 or Windows.])
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;;
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esac
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])
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