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[Emacs-diffs] master 10582d0: Update from Gnulib
|
From: |
Paul Eggert |
|
Subject: |
[Emacs-diffs] master 10582d0: Update from Gnulib |
|
Date: |
Wed, 29 May 2019 19:35:03 -0400 (EDT) |
branch: master
commit 10582d0511f4455d5c0449fd8a1e0eca9be06d7b
Author: Paul Eggert <address@hidden>
Commit: Paul Eggert <address@hidden>
Update from Gnulib
This incorporates:
2019-05-24 flexmember: update comments
2019-05-18 pthread_sigmask: fix --enable-threads=windows compilation
2019-05-14 close-stream, closein, closeout: simplify
2019-05-09 verify: remove verify_true
2019-05-09 verify: support C2X and C++17 static_assert
* build-aux/config.guess, build-aux/config.sub:
* doc/misc/texinfo.tex, lib/flexmember.h, lib/verify.h:
* m4/flexmember.m4, m4/pthread_sigmask.m4:
Copy from Gnulib
* m4/gnulib-comp.m4: Regenerate.
2019-05-26 Paul Eggert <address@hidden>
Update author/maintainer info
This mostly updates email addresses and fixes spellings of
author and maintainer names.
---
build-aux/config.guess | 61 ++++++++++-----------
build-aux/config.sub | 4 +-
doc/misc/texinfo.tex | 17 ++++--
lib/flexmember.h | 25 +++++++--
lib/verify.h | 110 +++++++++++++++++++-------------------
m4/flexmember.m4 | 8 ++-
m4/gnulib-comp.m4 | 2 -
m4/pthread_sigmask.m4 | 140 ++++++++++++++++++++++++-------------------------
8 files changed, 195 insertions(+), 172 deletions(-)
diff --git a/build-aux/config.guess b/build-aux/config.guess
index 4cd9454..ae71394 100755
--- a/build-aux/config.guess
+++ b/build-aux/config.guess
@@ -2,7 +2,7 @@
# Attempt to guess a canonical system name.
# Copyright 1992-2019 Free Software Foundation, Inc.
-timestamp='2019-04-28'
+timestamp='2019-05-28'
# 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
@@ -1325,38 +1325,39 @@ EOF
echo "$UNAME_MACHINE"-apple-rhapsody"$UNAME_RELEASE"
exit ;;
*:Darwin:*:*)
- UNAME_PROCESSOR=`uname -p` || UNAME_PROCESSOR=unknown
- set_cc_for_build
- if test "$UNAME_PROCESSOR" = unknown ; then
- UNAME_PROCESSOR=powerpc
+ UNAME_PROCESSOR=`uname -p`
+ case $UNAME_PROCESSOR in
+ unknown) UNAME_PROCESSOR=powerpc ;;
+ esac
+ if command -v xcode-select > /dev/null 2> /dev/null && \
+ ! xcode-select --print-path > /dev/null 2> /dev/null ; then
+ # Avoid executing cc if there is no toolchain installed as
+ # cc will be a stub that puts up a graphical alert
+ # prompting the user to install developer tools.
+ CC_FOR_BUILD=no_compiler_found
+ else
+ set_cc_for_build
fi
- if test "`echo "$UNAME_RELEASE" | sed -e 's/\..*//'`" -le 10 ; then
- if [ "$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
- then
- case $UNAME_PROCESSOR in
- i386) UNAME_PROCESSOR=x86_64 ;;
- powerpc) UNAME_PROCESSOR=powerpc64 ;;
- esac
- fi
- # On 10.4-10.6 one might compile for PowerPC via gcc -arch ppc
- if (echo '#ifdef __POWERPC__'; echo IS_PPC; echo '#endif') | \
- (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
- grep IS_PPC >/dev/null
- then
- UNAME_PROCESSOR=powerpc
- fi
+ if [ "$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
+ then
+ case $UNAME_PROCESSOR in
+ i386) UNAME_PROCESSOR=x86_64 ;;
+ powerpc) UNAME_PROCESSOR=powerpc64 ;;
+ esac
+ fi
+ # On 10.4-10.6 one might compile for PowerPC via gcc -arch ppc
+ if (echo '#ifdef __POWERPC__'; echo IS_PPC; echo '#endif') | \
+ (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
+ grep IS_PPC >/dev/null
+ then
+ UNAME_PROCESSOR=powerpc
fi
elif test "$UNAME_PROCESSOR" = i386 ; then
- # Avoid executing cc on OS X 10.9, as it ships with a stub
- # that puts up a graphical alert prompting to install
- # developer tools. Any system running Mac OS X 10.7 or
- # later (Darwin 11 and later) is required to have a 64-bit
- # processor. This is not true of the ARM version of Darwin
- # that Apple uses in portable devices.
- UNAME_PROCESSOR=x86_64
+ # uname -m returns i386 or x86_64
+ UNAME_PROCESSOR=$UNAME_MACHINE
fi
echo "$UNAME_PROCESSOR"-apple-darwin"$UNAME_RELEASE"
exit ;;
diff --git a/build-aux/config.sub b/build-aux/config.sub
index f53af5a..5b158ac 100755
--- a/build-aux/config.sub
+++ b/build-aux/config.sub
@@ -2,7 +2,7 @@
# Configuration validation subroutine script.
# Copyright 1992-2019 Free Software Foundation, Inc.
-timestamp='2019-01-05'
+timestamp='2019-05-23'
# 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
@@ -1172,7 +1172,7 @@ case $cpu-$vendor in
| asmjs \
| ba \
| be32 | be64 \
- | bfin | bs2000 \
+ | bfin | bpf | bs2000 \
| c[123]* | c30 | [cjt]90 | c4x \
| c8051 | clipper | craynv | csky | cydra \
| d10v | d30v | dlx | dsp16xx \
diff --git a/doc/misc/texinfo.tex b/doc/misc/texinfo.tex
index ccd1129..53f2fc4 100644
--- a/doc/misc/texinfo.tex
+++ b/doc/misc/texinfo.tex
@@ -3,7 +3,7 @@
% Load plain if necessary, i.e., if running under initex.
\expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
%
-\def\texinfoversion{2019-04-12.13}
+\def\texinfoversion{2019-05-18.15}
%
% Copyright 1985, 1986, 1988, 1990-2019 Free Software Foundation, Inc.
%
@@ -4952,6 +4952,8 @@ end
\definedummyword\sup
\definedummyword\textdegree
%
+ \definedummyword\subentry
+ %
% We want to disable all macros so that they are not expanded by \write.
\macrolist
\let\value\dummyvalue
@@ -5224,10 +5226,10 @@ end
}
\def\indexwriteseealso#1{
- address@hidden
+ \gdef\pagenumbertext{\string\seealso{#1}}%
}
\def\indexwriteseeentry#1{
- address@hidden
+ \gdef\pagenumbertext{\string\seeentry{#1}}%
}
% The default definitions
@@ -5315,6 +5317,15 @@ end
% the current value of \escapechar.
\def\escapeisbackslash{\escapechar=`\\}
+% Use \ in index files by default. texi2dvi didn't support @ as as the escape
+% character (as it checked for "\entry" in the files, and not "@entry"). When
+% the new version of texi2dvi has had a chance to become more prevalent, then
+% the escape character can change back to @ again. This should be an easy
+% change to make now because both @ and \ are only used as escape characters
in
+% index files, never standing for themselves.
+%
+\set txiindexescapeisbackslash
+
% Write the entry in \indextext to the index file.
%
\def\doindwrite{%
diff --git a/lib/flexmember.h b/lib/flexmember.h
index 0d65f6d..af17b41 100644
--- a/lib/flexmember.h
+++ b/lib/flexmember.h
@@ -33,11 +33,26 @@
# define FLEXALIGNOF(type) _Alignof (type)
#endif
-/* Upper bound on the size of a struct of type TYPE with a flexible
- array member named MEMBER that is followed by N bytes of other data.
- This is not simply sizeof (TYPE) + N, since it may require
- alignment on unusually picky C11 platforms, and
- FLEXIBLE_ARRAY_MEMBER may be 1 on pre-C11 platforms.
+/* Yield a properly aligned upper bound on the size of a struct of
+ type TYPE with a flexible array member named MEMBER that is
+ followed by N bytes of other data. The result is suitable as an
+ argument to malloc. For example:
+
+ struct s { int n; char d[FLEXIBLE_ARRAY_MEMBER]; };
+ struct s *p = malloc (FLEXSIZEOF (struct s, d, n * sizeof (char)));
+
+ FLEXSIZEOF (TYPE, MEMBER, N) is not simply (sizeof (TYPE) + N),
+ since FLEXIBLE_ARRAY_MEMBER may be 1 on pre-C11 platforms. Nor is
+ it simply (offsetof (TYPE, MEMBER) + N), as that might yield a size
+ that causes malloc to yield a pointer that is not properly aligned
+ for TYPE; for example, if sizeof (int) == alignof (int) == 4,
+ malloc (offsetof (struct s, d) + 3 * sizeof (char)) is equivalent
+ to malloc (7) and might yield a pointer that is not a multiple of 4
+ (which means the pointer is not properly aligned for struct s),
+ whereas malloc (FLEXSIZEOF (struct s, d, 3 * sizeof (char))) is
+ equivalent to malloc (8) and must yield a pointer that is a
+ multiple of 4.
+
Yield a value less than N if and only if arithmetic overflow occurs. */
#define FLEXSIZEOF(type, member, n) \
diff --git a/lib/verify.h b/lib/verify.h
index 6930645..f8e4eff 100644
--- a/lib/verify.h
+++ b/lib/verify.h
@@ -21,29 +21,37 @@
#define _GL_VERIFY_H
-/* Define _GL_HAVE__STATIC_ASSERT to 1 if _Static_assert works as per C11.
- This is supported by GCC 4.6.0 and later, in C mode, and its use
- here generates easier-to-read diagnostics when verify (R) fails.
-
- Define _GL_HAVE_STATIC_ASSERT to 1 if static_assert works as per C++11.
- This is supported by GCC 6.1.0 and later, in C++ mode.
-
- Use this only with GCC. If we were willing to slow 'configure'
- down we could also use it with other compilers, but since this
- affects only the quality of diagnostics, why bother? */
-#if (4 < __GNUC__ + (6 <= __GNUC_MINOR__) \
- && (201112L <= __STDC_VERSION__ || !defined __STRICT_ANSI__) \
- && !defined __cplusplus)
-# define _GL_HAVE__STATIC_ASSERT 1
-#endif
-#if (6 <= __GNUC__) && defined __cplusplus
-# define _GL_HAVE_STATIC_ASSERT 1
+/* Define _GL_HAVE__STATIC_ASSERT to 1 if _Static_assert (R, DIAGNOSTIC)
+ works as per C11. This is supported by GCC 4.6.0 and later, in C
+ mode.
+
+ Define _GL_HAVE__STATIC_ASSERT1 to 1 if _Static_assert (R) works as
+ per C2X, and define _GL_HAVE_STATIC_ASSERT1 if static_assert (R)
+ works as per C++17. This is supported by GCC 9.1 and later.
+
+ Support compilers claiming conformance to the relevant standard,
+ and also support GCC when not pedantic. If we were willing to slow
+ 'configure' down we could also use it with other compilers, but
+ since this affects only the quality of diagnostics, why bother? */
+#ifndef __cplusplus
+# if (201112L <= __STDC_VERSION__ \
+ || (!defined __STRICT_ANSI__ && 4 < __GNUC__ + (6 <= __GNUC_MINOR__)))
+# define _GL_HAVE__STATIC_ASSERT 1
+# endif
+# if (202000L <= __STDC_VERSION__ \
+ || (!defined __STRICT_ANSI__ && 9 <= __GNUC__))
+# define _GL_HAVE__STATIC_ASSERT1 1
+# endif
+#else
+# if 201703L <= __cplusplus || 9 <= __GNUC__
+# define _GL_HAVE_STATIC_ASSERT1 1
+# endif
#endif
/* FreeBSD 9.1 <sys/cdefs.h>, included by <stddef.h> and lots of other
system headers, defines a conflicting _Static_assert that is no
better than ours; override it. */
-#ifndef _GL_HAVE_STATIC_ASSERT
+#ifndef _GL_HAVE__STATIC_ASSERT
# include <stddef.h>
# undef _Static_assert
#endif
@@ -141,9 +149,9 @@
which do not support _Static_assert, also do not warn about the
last declaration mentioned above.
- * GCC warns if -Wnested-externs is enabled and verify() is used
+ * GCC warns if -Wnested-externs is enabled and 'verify' is used
within a function body; but inside a function, you can always
- arrange to use verify_expr() instead.
+ arrange to use verify_expr instead.
* In C++, any struct definition inside sizeof is invalid.
Use a template type to work around the problem. */
@@ -167,11 +175,9 @@
#define _GL_GENSYM(prefix) _GL_CONCAT (prefix, _GL_COUNTER)
/* Verify requirement R at compile-time, as an integer constant expression
- that returns 1. If R is false, fail at compile-time, preferably
- with a diagnostic that includes the string-literal DIAGNOSTIC. */
+ that returns 1. If R is false, fail at compile-time. */
-#define _GL_VERIFY_TRUE(R, DIAGNOSTIC) \
- (!!sizeof (_GL_VERIFY_TYPE (R, DIAGNOSTIC)))
+#define _GL_VERIFY_TRUE(R) (!!sizeof (_GL_VERIFY_TYPE (R)))
#ifdef __cplusplus
# if !GNULIB_defined_struct__gl_verify_type
@@ -181,40 +187,43 @@ template <int w>
};
# define GNULIB_defined_struct__gl_verify_type 1
# endif
-# define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
- _gl_verify_type<(R) ? 1 : -1>
-#elif defined _GL_HAVE__STATIC_ASSERT
-# define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
+# define _GL_VERIFY_TYPE(R) _gl_verify_type<(R) ? 1 : -1>
+#elif defined _GL_HAVE__STATIC_ASSERT1
+# define _GL_VERIFY_TYPE(R) \
struct { \
- _Static_assert (R, DIAGNOSTIC); \
+ _Static_assert (R); \
int _gl_dummy; \
}
#else
-# define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
+# define _GL_VERIFY_TYPE(R) \
struct { unsigned int _gl_verify_error_if_negative: (R) ? 1 : -1; }
#endif
/* Verify requirement R at compile-time, as a declaration without a
- trailing ';'. If R is false, fail at compile-time, preferably
- with a diagnostic that includes the string-literal DIAGNOSTIC.
+ trailing ';'. If R is false, fail at compile-time.
+
+ This macro requires three or more arguments but uses at most the first
+ two, so that the _Static_assert macro optionally defined below supports
+ both the C11 two-argument syntax and the C2X one-argument syntax.
Unfortunately, unlike C11, this implementation must appear as an
ordinary declaration, and cannot appear inside struct { ... }. */
-#ifdef _GL_HAVE__STATIC_ASSERT
-# define _GL_VERIFY _Static_assert
+#if defined _GL_HAVE__STATIC_ASSERT
+# define _GL_VERIFY(R, DIAGNOSTIC, ...) _Static_assert (R, DIAGNOSTIC)
#else
-# define _GL_VERIFY(R, DIAGNOSTIC) \
+# define _GL_VERIFY(R, DIAGNOSTIC, ...) \
extern int (*_GL_GENSYM (_gl_verify_function) (void)) \
- [_GL_VERIFY_TRUE (R, DIAGNOSTIC)]
+ [_GL_VERIFY_TRUE (R)]
#endif
/* _GL_STATIC_ASSERT_H is defined if this code is copied into assert.h. */
#ifdef _GL_STATIC_ASSERT_H
-# if !defined _GL_HAVE__STATIC_ASSERT && !defined _Static_assert
-# define _Static_assert(R, DIAGNOSTIC) _GL_VERIFY (R, DIAGNOSTIC)
+# if !defined _GL_HAVE__STATIC_ASSERT1 && !defined _Static_assert
+# define _Static_assert(...) \
+ _GL_VERIFY (__VA_ARGS__, "static assertion failed", -)
# endif
-# if !defined _GL_HAVE_STATIC_ASSERT && !defined static_assert
+# if !defined _GL_HAVE_STATIC_ASSERT1 && !defined static_assert
# define static_assert _Static_assert /* C11 requires this #define. */
# endif
#endif
@@ -226,31 +235,24 @@ template <int w>
assert (R), there is no run-time overhead.
There are two macros, since no single macro can be used in all
- contexts in C. verify_true (R) is for scalar contexts, including
+ contexts in C. verify_expr (R, E) is for scalar contexts, including
integer constant expression contexts. verify (R) is for declaration
contexts, e.g., the top level. */
-/* Verify requirement R at compile-time, as an integer constant expression.
- Return 1. This is equivalent to verify_expr (R, 1).
-
- verify_true is obsolescent; please use verify_expr instead. */
-
-#define verify_true(R) _GL_VERIFY_TRUE (R, "verify_true (" #R ")")
-
/* Verify requirement R at compile-time. Return the value of the
expression E. */
-#define verify_expr(R, E) \
- (_GL_VERIFY_TRUE (R, "verify_expr (" #R ", " #E ")") ? (E) : (E))
+#define verify_expr(R, E) (_GL_VERIFY_TRUE (R) ? (E) : (E))
/* Verify requirement R at compile-time, as a declaration without a
- trailing ';'. */
+ trailing ';'. verify (R) acts like static_assert (R) except that
+ it is portable to C11/C++14 and earlier, and its name is shorter
+ and may be more convenient. */
-#ifdef __GNUC__
-# define verify(R) _GL_VERIFY (R, "verify (" #R ")")
+#ifdef _GL_HAVE__STATIC_ASSERT1
+# define verify(R) _Static_assert (R)
#else
-/* PGI barfs if R is long. Play it safe. */
-# define verify(R) _GL_VERIFY (R, "verify (...)")
+# define verify(R) _GL_VERIFY (R, "verify (...)", -)
#endif
#ifndef __has_builtin
diff --git a/m4/flexmember.m4 b/m4/flexmember.m4
index 1347068..c245ab0 100644
--- a/m4/flexmember.m4
+++ b/m4/flexmember.m4
@@ -34,12 +34,10 @@ AC_DEFUN([AC_C_FLEXIBLE_ARRAY_MEMBER],
AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [],
[Define to nothing if C supports flexible array members, and to
1 if it does not. That way, with a declaration like 'struct s
- { int n; double d@<:@FLEXIBLE_ARRAY_MEMBER@:>@; };', the struct hack
+ { int n; short d@<:@FLEXIBLE_ARRAY_MEMBER@:>@; };', the struct hack
can be used with pre-C99 compilers.
- When computing the size of such an object, don't use 'sizeof (struct s)'
- as it overestimates the size. Use 'offsetof (struct s, d)' instead.
- Don't use 'offsetof (struct s, d@<:@0@:>@)', as this doesn't work with
- MSVC and with C++ compilers.])
+ Use 'FLEXSIZEOF (struct s, d, N * sizeof (short))' to calculate
+ the size in bytes of such a struct containing an N-element array.])
else
AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1])
fi
diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4
index f648b7a..0a7a30e 100644
--- a/m4/gnulib-comp.m4
+++ b/m4/gnulib-comp.m4
@@ -200,7 +200,6 @@ AC_DEFUN([gl_INIT],
gl_BYTESWAP
AC_CHECK_FUNCS_ONCE([readlinkat])
gl_CLOCK_TIME
- gl_CLOSE_STREAM
gl_MODULE_INDICATOR([close-stream])
gl_COUNT_LEADING_ZEROS
gl_COUNT_ONE_BITS
@@ -996,7 +995,6 @@ AC_DEFUN([gl_FILE_LIST], [
m4/builtin-expect.m4
m4/byteswap.m4
m4/clock_time.m4
- m4/close-stream.m4
m4/count-leading-zeros.m4
m4/count-one-bits.m4
m4/count-trailing-zeros.m4
diff --git a/m4/pthread_sigmask.m4 b/m4/pthread_sigmask.m4
index cadc239..648edf9 100644
--- a/m4/pthread_sigmask.m4
+++ b/m4/pthread_sigmask.m4
@@ -1,4 +1,4 @@
-# pthread_sigmask.m4 serial 16
+# pthread_sigmask.m4 serial 17
dnl Copyright (C) 2011-2019 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -9,103 +9,101 @@ AC_DEFUN([gl_FUNC_PTHREAD_SIGMASK],
AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
AC_CHECK_FUNCS_ONCE([pthread_sigmask])
+
+ dnl On MinGW pthread_sigmask is just a macro which always returns 0.
+ dnl It does not exist as a real function, which is required by POSIX.
+ AC_CACHE_CHECK([whether pthread_sigmask is a macro],
+ [gl_cv_func_pthread_sigmask_macro],
+ [AC_EGREP_CPP([headers_define_pthread_sigmask], [
+#include <pthread.h>
+#include <signal.h>
+#ifdef pthread_sigmask
+ headers_define_pthread_sigmask
+#endif],
+ [gl_cv_func_pthread_sigmask_macro=yes],
+ [gl_cv_func_pthread_sigmask_macro=no])
+ ])
+
LIB_PTHREAD_SIGMASK=
- dnl Test whether the gnulib module 'threadlib' is in use.
- dnl Some packages like Emacs use --avoid=threadlib.
- dnl Write the symbol in such a way that it does not cause 'aclocal' to pick
- dnl the threadlib.m4 file that is installed in $PREFIX/share/aclocal/.
- m4_ifdef([gl_][THREADLIB], [
- AC_REQUIRE([gl_][THREADLIB])
+ if test $gl_cv_func_pthread_sigmask_macro = yes; then
+ dnl pthread_sigmask is a dummy macro.
+ HAVE_PTHREAD_SIGMASK=0
+ dnl Make sure to '#undef pthread_sigmask' before defining it.
+ REPLACE_PTHREAD_SIGMASK=1
+ else
+ dnl Test whether the gnulib module 'threadlib' is in use.
+ dnl Some packages like Emacs use --avoid=threadlib.
+ dnl Write the symbol in such a way that it does not cause 'aclocal' to pick
+ dnl the threadlib.m4 file that is installed in $PREFIX/share/aclocal/.
+ m4_ifdef([gl_][THREADLIB], [
+ AC_REQUIRE([gl_][THREADLIB])
- if test "$gl_threads_api" = posix; then
- if test $ac_cv_func_pthread_sigmask = yes; then
- dnl pthread_sigmask is available without -lpthread.
- :
- else
- if test -n "$LIBMULTITHREAD"; then
- AC_CACHE_CHECK([for pthread_sigmask in $LIBMULTITHREAD],
- [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD],
- [gl_save_LIBS="$LIBS"
- LIBS="$LIBS $LIBMULTITHREAD"
- AC_LINK_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <pthread.h>
- #include <signal.h>
- ]],
- [[return pthread_sigmask (0, (sigset_t *) 0, (sigset_t *)
0);]])
- ],
- [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=yes],
- [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=no])
- LIBS="$gl_save_LIBS"
- ])
- if test $gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD = yes; then
- AC_CACHE_CHECK([whether pthread_sigmask is only a macro],
- [gl_cv_func_pthread_sigmask_is_macro],
+ if test "$gl_threads_api" = posix; then
+ if test $ac_cv_func_pthread_sigmask = yes; then
+ dnl pthread_sigmask is available without -lpthread.
+ :
+ else
+ if test -n "$LIBMULTITHREAD"; then
+ AC_CACHE_CHECK([for pthread_sigmask in $LIBMULTITHREAD],
+ [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD],
[gl_save_LIBS="$LIBS"
LIBS="$LIBS $LIBMULTITHREAD"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include <pthread.h>
#include <signal.h>
- #undef pthread_sigmask
]],
[[return pthread_sigmask (0, (sigset_t *) 0, (sigset_t *)
0);]])
],
- [gl_cv_func_pthread_sigmask_is_macro=no],
- [gl_cv_func_pthread_sigmask_is_macro=yes])
+ [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=yes],
+ [gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=no])
LIBS="$gl_save_LIBS"
])
- if test $gl_cv_func_pthread_sigmask_is_macro = yes; then
- dnl On MinGW pthread_sigmask is just a macro which always
returns 0.
- dnl It does not exist as a real function, which is required by
POSIX.
- REPLACE_PTHREAD_SIGMASK=1
- gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=no
+ if test $gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD = yes; then
+ dnl pthread_sigmask is available with -pthread or -lpthread.
+ LIB_PTHREAD_SIGMASK="$LIBMULTITHREAD"
+ else
+ dnl pthread_sigmask is not available at all.
+ HAVE_PTHREAD_SIGMASK=0
fi
- fi
- if test $gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD = yes; then
- dnl pthread_sigmask is available with -pthread or -lpthread.
- LIB_PTHREAD_SIGMASK="$LIBMULTITHREAD"
else
dnl pthread_sigmask is not available at all.
HAVE_PTHREAD_SIGMASK=0
fi
+ fi
+ else
+ dnl pthread_sigmask may exist but does not interoperate with the chosen
+ dnl multithreading facility.
+ dnl If "$gl_threads_api" = pth, we could use the function pth_sigmask,
+ dnl but it is equivalent to sigprocmask, so we choose to emulate
+ dnl pthread_sigmask with sigprocmask also in this case. This yields
+ dnl fewer link dependencies.
+ if test $ac_cv_func_pthread_sigmask = yes; then
+ REPLACE_PTHREAD_SIGMASK=1
else
- dnl pthread_sigmask is not available at all.
HAVE_PTHREAD_SIGMASK=0
fi
fi
- else
- dnl pthread_sigmask may exist but does not interoperate with the chosen
- dnl multithreading facility.
- dnl If "$gl_threads_api" = pth, we could use the function pth_sigmask,
- dnl but it is equivalent to sigprocmask, so we choose to emulate
- dnl pthread_sigmask with sigprocmask also in this case. This yields fewer
- dnl link dependencies.
+ ], [
+ dnl The module 'threadlib' is not in use, due to --avoid=threadlib being
+ dnl specified.
+ dnl The package either has prepared CPPFLAGS and LIBS for use of
+ dnl POSIX:2008 threads, or wants to build single-threaded programs.
if test $ac_cv_func_pthread_sigmask = yes; then
- REPLACE_PTHREAD_SIGMASK=1
+ dnl pthread_sigmask exists and does not require extra libraries.
+ dnl Assume that it is declared.
+ :
else
+ dnl pthread_sigmask either does not exist or needs extra libraries.
HAVE_PTHREAD_SIGMASK=0
+ dnl Define the symbol rpl_pthread_sigmask, not pthread_sigmask,
+ dnl so as to not accidentally override the system's pthread_sigmask
+ dnl symbol from libpthread. This is necessary on IRIX 6.5.
+ REPLACE_PTHREAD_SIGMASK=1
fi
- fi
- ], [
- dnl The module 'threadlib' is not in use, due to --avoid=threadlib being
- dnl specified.
- dnl The package either has prepared CPPFLAGS and LIBS for use of POSIX:2008
- dnl threads, or wants to build single-threaded programs.
- if test $ac_cv_func_pthread_sigmask = yes; then
- dnl pthread_sigmask exists and does not require extra libraries.
- dnl Assume that it is declared.
- :
- else
- dnl pthread_sigmask either does not exist or needs extra libraries.
- HAVE_PTHREAD_SIGMASK=0
- dnl Define the symbol rpl_pthread_sigmask, not pthread_sigmask,
- dnl so as to not accidentally override the system's pthread_sigmask
- dnl symbol from libpthread. This is necessary on IRIX 6.5.
- REPLACE_PTHREAD_SIGMASK=1
- fi
- ])
+ ])
+ fi
AC_SUBST([LIB_PTHREAD_SIGMASK])
dnl We don't need a variable LTLIB_PTHREAD_SIGMASK, because when
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