Mercurial > gnulib
view lib/freadable.c @ 40206:770a5696761e
relocatable-prog: Use wrapper-free installation on Mac OS X, take 2.
This approach supports relocatable installation of shared libraries
which depend on other shared libraries from the same package.
* m4/relocatable.m4 (gl_RELOCATABLE_BODY): Determine use_macos_tools.
If use_macos_tools is true, use reloc-ldflags and set LIBTOOL to be a
wrapper around the original LIBTOOL.
* build-aux/reloc-ldflags: Add support for Mac OS X, which uses the
token '@loader_path' instead of '$ORIGIN'.
* build-aux/libtool-reloc: New file.
* modules/relocatable-prog (Files): Add it.
* doc/relocatable-maint.texi (Supporting Relocation): Update to match
the recent changes. Document the need to set the *_LDFLAGS of libraries.
RELOCATABLE_LIBRARY_PATH and RELOCATABLE_CONFIG_H_DIR should be set in
Makefile.am, not in configure.ac.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Mon, 04 Mar 2019 17:25:09 +0100 |
parents | b06060465f09 |
children |
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/* Retrieve information about a FILE stream. Copyright (C) 2007-2019 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ #include <config.h> /* Specification. */ #include "freadable.h" #include "stdio-impl.h" #if defined EPLAN9 /* Plan9 */ # include <fcntl.h> #endif /* This file is not used on systems that have the __freadable function, namely glibc >= 2.2, Solaris >= 7, Android API >= 23, musl libc. */ bool freadable (FILE *fp) { /* Most systems provide FILE as a struct and the necessary bitmask in <stdio.h>, because they need it for implementing getc() and putc() as fast macros. */ #if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ return (fp->_flags & _IO_NO_READS) == 0; #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Minix 3, Android */ return (fp_->_flags & (__SRW | __SRD)) != 0; #elif defined __EMX__ /* emx+gcc */ return (fp->_flags & (_IORW | _IOREAD)) != 0; #elif defined __minix /* Minix */ return (fp->_flags & _IOREAD) != 0; #elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, MSVC, NonStop Kernel, OpenVMS */ return (fp_->_flag & (_IORW | _IOREAD)) != 0; #elif defined __QNX__ /* QNX */ return (fp->_Mode & 0x1 /* _MOPENR */) != 0; #elif defined __MINT__ /* Atari FreeMiNT */ return fp->__mode.__read; #elif defined EPLAN9 /* Plan9 */ int fd = fp->fd; if (fd >= 0) { int flags = fcntl (fd, F_GETFL, NULL); if (flags >= 0) { flags &= O_ACCMODE; return (flags == O_RDONLY || flags == O_RDWR); } } return 0; #else # error "Please port gnulib freadable.c to your platform! Look at the definition of fopen, fdopen on your system, then report this to bug-gnulib." #endif }