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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.
54 lines
1.6 KiB
Plaintext
54 lines
1.6 KiB
Plaintext
# dup.m4 serial 6
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dnl Copyright (C) 2011-2020 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_DUP],
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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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m4_ifdef([gl_MSVC_INVAL], [
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AC_REQUIRE([gl_MSVC_INVAL])
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if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
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REPLACE_DUP=1
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fi
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])
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dnl Replace dup() for supporting the gnulib-defined fchdir() function,
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dnl to keep fchdir's bookkeeping up-to-date.
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m4_ifdef([gl_FUNC_FCHDIR], [
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gl_TEST_FCHDIR
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if test $HAVE_FCHDIR = 0; then
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REPLACE_DUP=1
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fi
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])
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AC_CACHE_CHECK([whether dup works], [gl_cv_func_dup_works],
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[AC_RUN_IFELSE(
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[AC_LANG_PROGRAM([[#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>]],
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[[/* On OS/2 kLIBC, dup does not work on a directory fd. */
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int fd = open (".", O_RDONLY);
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return fd < 0 ? 1 : dup (fd) < 0 ? 2 : 0;
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]])
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],
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[gl_cv_func_dup_works=yes],
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[gl_cv_func_dup_works=no],
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[case "$host_os" in
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# Guess no on native Windows.
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mingw*) gl_cv_func_dup_works="guessing no" ;;
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*) gl_cv_func_dup_works="guessing yes" ;;
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esac
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])
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])
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case "$gl_cv_func_dup_works" in
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*yes) ;;
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*)
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REPLACE_DUP=1
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;;
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esac
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])
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# Prerequisites of lib/dup.c.
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AC_DEFUN([gl_PREREQ_DUP], [:])
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