diff options
| -rwxr-xr-x | build-aux/config.guess | 28 | ||||
| -rwxr-xr-x | build-aux/config.sub | 4 | ||||
| -rw-r--r-- | lib/careadlinkat.c | 108 | ||||
| -rw-r--r-- | lib/gnulib.mk.in | 4 | ||||
| -rw-r--r-- | lib/stdalign.in.h | 6 | ||||
| -rw-r--r-- | lib/string.in.h | 15 | ||||
| -rw-r--r-- | m4/std-gnu11.m4 | 4 | ||||
| -rw-r--r-- | m4/string_h.m4 | 6 |
8 files changed, 107 insertions, 68 deletions
diff --git a/build-aux/config.guess b/build-aux/config.guess index e94095c5fbe..9aff91cfd03 100755 --- a/build-aux/config.guess +++ b/build-aux/config.guess @@ -2,7 +2,7 @@ # Attempt to guess a canonical system name. # Copyright 1992-2020 Free Software Foundation, Inc. -timestamp='2020-07-12' +timestamp='2020-08-17' # This file is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by @@ -404,7 +404,7 @@ case "$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in # If there is a compiler, see if it is configured for 64-bit objects. # Note that the Sun cc does not turn __LP64__ into 1 like gcc does. # This test works for both compilers. - if [ "$CC_FOR_BUILD" != no_compiler_found ]; then + if test "$CC_FOR_BUILD" != no_compiler_found; then if (echo '#ifdef __amd64'; echo IS_64BIT_ARCH; echo '#endif') | \ (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \ grep IS_64BIT_ARCH >/dev/null @@ -544,10 +544,10 @@ EOF AViiON:dgux:*:*) # DG/UX returns AViiON for all architectures UNAME_PROCESSOR=`/usr/bin/uname -p` - if [ "$UNAME_PROCESSOR" = mc88100 ] || [ "$UNAME_PROCESSOR" = mc88110 ] + if test "$UNAME_PROCESSOR" = mc88100 || test "$UNAME_PROCESSOR" = mc88110 then - if [ "$TARGET_BINARY_INTERFACE"x = m88kdguxelfx ] || \ - [ "$TARGET_BINARY_INTERFACE"x = x ] + if test "$TARGET_BINARY_INTERFACE"x = m88kdguxelfx || \ + test "$TARGET_BINARY_INTERFACE"x = x then echo m88k-dg-dgux"$UNAME_RELEASE" else @@ -580,7 +580,7 @@ EOF echo i386-ibm-aix exit ;; ia64:AIX:*:*) - if [ -x /usr/bin/oslevel ] ; then + if test -x /usr/bin/oslevel ; then IBM_REV=`/usr/bin/oslevel` else IBM_REV="$UNAME_VERSION.$UNAME_RELEASE" @@ -620,7 +620,7 @@ EOF else IBM_ARCH=powerpc fi - if [ -x /usr/bin/lslpp ] ; then + if test -x /usr/bin/lslpp ; then IBM_REV=`/usr/bin/lslpp -Lqc bos.rte.libc | awk -F: '{ print $3 }' | sed s/[0-9]*$/0/` else @@ -655,7 +655,7 @@ EOF 9000/31?) HP_ARCH=m68000 ;; 9000/[34]??) HP_ARCH=m68k ;; 9000/[678][0-9][0-9]) - if [ -x /usr/bin/getconf ]; then + if test -x /usr/bin/getconf; then sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null` sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null` case "$sc_cpu_version" in @@ -669,7 +669,7 @@ EOF esac ;; esac fi - if [ "$HP_ARCH" = "" ]; then + if test "$HP_ARCH" = ""; then set_cc_for_build sed 's/^ //' << EOF > "$dummy.c" @@ -708,7 +708,7 @@ EOF test -z "$HP_ARCH" && HP_ARCH=hppa fi ;; esac - if [ "$HP_ARCH" = hppa2.0w ] + if test "$HP_ARCH" = hppa2.0w then set_cc_for_build @@ -782,7 +782,7 @@ EOF echo hppa1.0-hp-osf exit ;; i*86:OSF1:*:*) - if [ -x /usr/sbin/sysversion ] ; then + if test -x /usr/sbin/sysversion ; then echo "$UNAME_MACHINE"-unknown-osf1mk else echo "$UNAME_MACHINE"-unknown-osf1 @@ -1097,7 +1097,7 @@ EOF x86_64:Linux:*:*) set_cc_for_build LIBCABI=$LIBC - if [ "$CC_FOR_BUILD" != no_compiler_found ]; then + if test "$CC_FOR_BUILD" != no_compiler_found; then if (echo '#ifdef __ILP32__'; echo IS_X32; echo '#endif') | \ (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \ grep IS_X32 >/dev/null @@ -1294,7 +1294,7 @@ EOF echo mips-sony-newsos6 exit ;; R[34]000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R*000:UNIX_SV:*:*) - if [ -d /usr/nec ]; then + if test -d /usr/nec; then echo mips-nec-sysv"$UNAME_RELEASE" else echo mips-unknown-sysv"$UNAME_RELEASE" @@ -1359,7 +1359,7 @@ EOF else set_cc_for_build fi - if [ "$CC_FOR_BUILD" != no_compiler_found ]; then + if test "$CC_FOR_BUILD" != no_compiler_found; then if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \ (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \ grep IS_64BIT_ARCH >/dev/null diff --git a/build-aux/config.sub b/build-aux/config.sub index 3d9a8dc3d5a..0753e308458 100755 --- a/build-aux/config.sub +++ b/build-aux/config.sub @@ -2,7 +2,7 @@ # Configuration validation subroutine script. # Copyright 1992-2020 Free Software Foundation, Inc. -timestamp='2020-07-10' +timestamp='2020-08-17' # This file is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by @@ -1278,7 +1278,7 @@ esac # Decode manufacturer-specific aliases for certain operating systems. -if [ x$basic_os != x ] +if test x$basic_os != x then # First recognize some ad-hoc caes, or perhaps split kernel-os, or else just diff --git a/lib/careadlinkat.c b/lib/careadlinkat.c index 1aa04363dac..e43aa42d5c4 100644 --- a/lib/careadlinkat.c +++ b/lib/careadlinkat.c @@ -38,66 +38,41 @@ #include "allocator.h" -/* Assuming the current directory is FD, get the symbolic link value - of FILENAME as a null-terminated string and put it into a buffer. - If FD is AT_FDCWD, FILENAME is interpreted relative to the current - working directory, as in openat. - - If the link is small enough to fit into BUFFER put it there. - BUFFER's size is BUFFER_SIZE, and BUFFER can be null - if BUFFER_SIZE is zero. - - If the link is not small, put it into a dynamically allocated - buffer managed by ALLOC. It is the caller's responsibility to free - the returned value if it is nonnull and is not BUFFER. A null - ALLOC stands for the standard allocator. - - The PREADLINKAT function specifies how to read links. It operates - like POSIX readlinkat() - <https://pubs.opengroup.org/onlinepubs/9699919799/functions/readlink.html> - but can assume that its first argument is the same as FD. - - If successful, return the buffer address; otherwise return NULL and - set errno. */ - -char * -careadlinkat (int fd, char const *filename, +enum { STACK_BUF_SIZE = 1024 }; + +/* Act like careadlinkat (see below), with an additional argument + STACK_BUF that can be used as temporary storage. + + If GCC_LINT is defined, do not inline this function with GCC 10.1 + and later, to avoid creating a pointer to the stack that GCC + -Wreturn-local-addr incorrectly complains about. See: + https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644 + Although the noinline attribute can hurt performance a bit, no better way + to pacify GCC is known; even an explicit #pragma does not pacify GCC. + When the GCC bug is fixed this workaround should be limited to the + broken GCC versions. */ +#if (defined GCC_LINT || defined lint) && _GL_GNUC_PREREQ (10, 1) +__attribute__ ((__noinline__)) +#endif +static char * +readlink_stk (int fd, char const *filename, char *buffer, size_t buffer_size, struct allocator const *alloc, - ssize_t (*preadlinkat) (int, char const *, char *, size_t)) + ssize_t (*preadlinkat) (int, char const *, char *, size_t), + char stack_buf[STACK_BUF_SIZE]) { char *buf; size_t buf_size; size_t buf_size_max = SSIZE_MAX < SIZE_MAX ? (size_t) SSIZE_MAX + 1 : SIZE_MAX; - char stack_buf[1024]; - -#if (defined GCC_LINT || defined lint) && _GL_GNUC_PREREQ (10, 1) - /* Pacify preadlinkat without creating a pointer to the stack - that a broken gcc -Wreturn-local-addr would cry wolf about. See: - https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95044 - This workaround differs from the mainline code, but - no other way to pacify GCC 10.1.0 is known; even an explicit - #pragma does not pacify GCC. When the GCC bug is fixed this - workaround should be limited to the broken GCC versions. */ -# define WORK_AROUND_GCC_BUG_95044 -#endif if (! alloc) alloc = &stdlib_allocator; if (!buffer) { -#ifdef WORK_AROUND_GCC_BUG_95044 - buffer = alloc->allocate (sizeof stack_buf); -#else - /* Allocate the initial buffer on the stack. This way, in the - common case of a symlink of small size, we get away with a - single small malloc() instead of a big malloc() followed by a - shrinking realloc(). */ buffer = stack_buf; -#endif - buffer_size = sizeof stack_buf; + buffer_size = STACK_BUF_SIZE; } buf = buffer; @@ -172,3 +147,44 @@ careadlinkat (int fd, char const *filename, errno = ENOMEM; return NULL; } + + +/* Assuming the current directory is FD, get the symbolic link value + of FILENAME as a null-terminated string and put it into a buffer. + If FD is AT_FDCWD, FILENAME is interpreted relative to the current + working directory, as in openat. + + If the link is small enough to fit into BUFFER put it there. + BUFFER's size is BUFFER_SIZE, and BUFFER can be null + if BUFFER_SIZE is zero. + + If the link is not small, put it into a dynamically allocated + buffer managed by ALLOC. It is the caller's responsibility to free + the returned value if it is nonnull and is not BUFFER. A null + ALLOC stands for the standard allocator. + + The PREADLINKAT function specifies how to read links. It operates + like POSIX readlinkat() + <https://pubs.opengroup.org/onlinepubs/9699919799/functions/readlink.html> + but can assume that its first argument is the same as FD. + + If successful, return the buffer address; otherwise return NULL and + set errno. */ + +char * +careadlinkat (int fd, char const *filename, + char *buffer, size_t buffer_size, + struct allocator const *alloc, + ssize_t (*preadlinkat) (int, char const *, char *, size_t)) +{ + /* Allocate the initial buffer on the stack. This way, in the + common case of a symlink of small size, we get away with a + single small malloc instead of a big malloc followed by a + shrinking realloc. + + If GCC -Wreturn-local-addr warns about this buffer, the warning + is bogus; see readlink_stk. */ + char stack_buf[STACK_BUF_SIZE]; + return readlink_stk (fd, filename, buffer, buffer_size, alloc, + preadlinkat, stack_buf); +} diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in index 7b4fc74219f..78b4542d80a 100644 --- a/lib/gnulib.mk.in +++ b/lib/gnulib.mk.in @@ -424,6 +424,7 @@ GNULIB_SECURE_GETENV = @GNULIB_SECURE_GETENV@ GNULIB_SELECT = @GNULIB_SELECT@ GNULIB_SETENV = @GNULIB_SETENV@ GNULIB_SETHOSTNAME = @GNULIB_SETHOSTNAME@ +GNULIB_SIGABBREV_NP = @GNULIB_SIGABBREV_NP@ GNULIB_SIGACTION = @GNULIB_SIGACTION@ GNULIB_SIGNAL_H_SIGPIPE = @GNULIB_SIGNAL_H_SIGPIPE@ GNULIB_SIGPROCMASK = @GNULIB_SIGPROCMASK@ @@ -644,6 +645,7 @@ HAVE_SECURE_GETENV = @HAVE_SECURE_GETENV@ HAVE_SETENV = @HAVE_SETENV@ HAVE_SETHOSTNAME = @HAVE_SETHOSTNAME@ HAVE_SETSTATE = @HAVE_SETSTATE@ +HAVE_SIGABBREV_NP = @HAVE_SIGABBREV_NP@ HAVE_SIGACTION = @HAVE_SIGACTION@ HAVE_SIGHANDLER_T = @HAVE_SIGHANDLER_T@ HAVE_SIGINFO_T = @HAVE_SIGINFO_T@ @@ -2843,6 +2845,7 @@ string.h: string.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H -e 's/@''GNULIB_STRTOK_R''@/$(GNULIB_STRTOK_R)/g' \ -e 's/@''GNULIB_STRERROR''@/$(GNULIB_STRERROR)/g' \ -e 's/@''GNULIB_STRERROR_R''@/$(GNULIB_STRERROR_R)/g' \ + -e 's/@''GNULIB_SIGABBREV_NP''@/$(GNULIB_SIGABBREV_NP)/g' \ -e 's/@''GNULIB_STRSIGNAL''@/$(GNULIB_STRSIGNAL)/g' \ -e 's/@''GNULIB_STRVERSCMP''@/$(GNULIB_STRVERSCMP)/g' \ < $(srcdir)/string.in.h | \ @@ -2865,6 +2868,7 @@ string.h: string.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H -e 's|@''HAVE_STRCASESTR''@|$(HAVE_STRCASESTR)|g' \ -e 's|@''HAVE_DECL_STRTOK_R''@|$(HAVE_DECL_STRTOK_R)|g' \ -e 's|@''HAVE_DECL_STRERROR_R''@|$(HAVE_DECL_STRERROR_R)|g' \ + -e 's|@''HAVE_SIGABBREV_NP''@|$(HAVE_SIGABBREV_NP)|g' \ -e 's|@''HAVE_DECL_STRSIGNAL''@|$(HAVE_DECL_STRSIGNAL)|g' \ -e 's|@''HAVE_STRVERSCMP''@|$(HAVE_STRVERSCMP)|g' \ -e 's|@''REPLACE_MEMCHR''@|$(REPLACE_MEMCHR)|g' \ diff --git a/lib/stdalign.in.h b/lib/stdalign.in.h index e4809b401f7..b5b63e53f12 100644 --- a/lib/stdalign.in.h +++ b/lib/stdalign.in.h @@ -54,10 +54,12 @@ #undef _Alignof /* GCC releases before GCC 4.9 had a bug in _Alignof. See GCC bug 52023 - <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>. */ + <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>. + clang versions < 8.0.0 have the same bug. */ #if (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112 \ || (defined __GNUC__ && __GNUC__ < 4 + (__GNUC_MINOR__ < 9) \ - && !defined __clang__)) + && !defined __clang__) \ + || (defined __clang__ && __clang_major__ < 8)) # ifdef __cplusplus # if 201103 <= __cplusplus # define _Alignof(type) alignof (type) diff --git a/lib/string.in.h b/lib/string.in.h index 7d83668f6ec..5134e11289d 100644 --- a/lib/string.in.h +++ b/lib/string.in.h @@ -1045,6 +1045,21 @@ _GL_WARN_ON_USE (strerror_r, "strerror_r is unportable - " # endif #endif +/* Return an abbreviation string for the signal number SIG. */ +#if @GNULIB_SIGABBREV_NP@ +# if ! @HAVE_SIGABBREV_NP@ +_GL_FUNCDECL_SYS (sigabbrev_np, const char *, (int sig)); +# endif +_GL_CXXALIAS_SYS (sigabbrev_np, const char *, (int sig)); +_GL_CXXALIASWARN (sigabbrev_np); +#elif defined GNULIB_POSIXCHECK +# undef sigabbrev_np +# if HAVE_RAW_DECL_SIGABBREV_NP +_GL_WARN_ON_USE (sigabbrev_np, "sigabbrev_np is unportable - " + "use gnulib module sigabbrev_np for portability"); +# endif +#endif + #if @GNULIB_STRSIGNAL@ # if @REPLACE_STRSIGNAL@ # if !(defined __cplusplus && defined GNULIB_NAMESPACE) diff --git a/m4/std-gnu11.m4 b/m4/std-gnu11.m4 index c1ec624b3b3..db833d820f3 100644 --- a/m4/std-gnu11.m4 +++ b/m4/std-gnu11.m4 @@ -70,7 +70,7 @@ _AS_ECHO_LOG([checking for _AC_LANG compiler version]) set X $ac_compile ac_compiler=$[2] for ac_option in --version -v -V -qversion -version; do - m4_ifdef([_AC_DO_LIMIT],[_AC_DO_LIMIT],[_AC_DO])([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD]) + _AC_DO_LIMIT([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD]) done m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl @@ -135,7 +135,7 @@ _AS_ECHO_LOG([checking for _AC_LANG compiler version]) set X $ac_compile ac_compiler=$[2] for ac_option in --version -v -V -qversion; do - m4_ifdef([_AC_DO_LIMIT],[_AC_DO_LIMIT],[_AC_DO])([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD]) + _AC_DO_LIMIT([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD]) done m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl diff --git a/m4/string_h.m4 b/m4/string_h.m4 index 516b346b311..d519beaa591 100644 --- a/m4/string_h.m4 +++ b/m4/string_h.m4 @@ -5,7 +5,7 @@ # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. -# serial 24 +# serial 25 # Written by Paul Eggert. @@ -28,7 +28,7 @@ AC_DEFUN([gl_HEADER_STRING_H_BODY], ]], [ffsl ffsll memmem mempcpy memrchr rawmemchr stpcpy stpncpy strchrnul strdup strncat strndup strnlen strpbrk strsep strcasestr strtok_r - strerror_r strsignal strverscmp]) + strerror_r sigabbrev_np strsignal strverscmp]) AC_REQUIRE([AC_C_RESTRICT]) ]) @@ -80,6 +80,7 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS], GNULIB_MBSTOK_R=0; AC_SUBST([GNULIB_MBSTOK_R]) GNULIB_STRERROR=0; AC_SUBST([GNULIB_STRERROR]) GNULIB_STRERROR_R=0; AC_SUBST([GNULIB_STRERROR_R]) + GNULIB_SIGABBREV_NP=0;AC_SUBST([GNULIB_SIGABBREV_NP]) GNULIB_STRSIGNAL=0; AC_SUBST([GNULIB_STRSIGNAL]) GNULIB_STRVERSCMP=0; AC_SUBST([GNULIB_STRVERSCMP]) HAVE_MBSLEN=0; AC_SUBST([HAVE_MBSLEN]) @@ -102,6 +103,7 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS], HAVE_STRCASESTR=1; AC_SUBST([HAVE_STRCASESTR]) HAVE_DECL_STRTOK_R=1; AC_SUBST([HAVE_DECL_STRTOK_R]) HAVE_DECL_STRERROR_R=1; AC_SUBST([HAVE_DECL_STRERROR_R]) + HAVE_SIGABBREV_NP=1; AC_SUBST([HAVE_SIGABBREV_NP]) HAVE_DECL_STRSIGNAL=1; AC_SUBST([HAVE_DECL_STRSIGNAL]) HAVE_STRVERSCMP=1; AC_SUBST([HAVE_STRVERSCMP]) REPLACE_MEMCHR=0; AC_SUBST([REPLACE_MEMCHR]) |