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58 lines
2.2 KiB
58 lines
2.2 KiB
# signal_h.m4 serial 12 |
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dnl Copyright (C) 2007-2011 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_SIGNAL_H], |
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[ |
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AC_REQUIRE([gl_SIGNAL_H_DEFAULTS]) |
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gl_NEXT_HEADERS([signal.h]) |
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# AIX declares sig_atomic_t to already include volatile, and C89 compilers |
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# then choke on 'volatile sig_atomic_t'. C99 requires that it compile. |
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AC_CHECK_TYPE([volatile sig_atomic_t], [], |
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[HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=0], [[ |
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#include <signal.h> |
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]]) |
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AC_REQUIRE([AC_TYPE_UID_T]) |
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dnl Persuade glibc <signal.h> to define sighandler_t. |
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AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) |
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AC_CHECK_TYPE([sighandler_t], [], [HAVE_SIGHANDLER_T=0], [[ |
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#include <signal.h> |
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]]) |
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dnl Check for declarations of anything we want to poison if the |
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dnl corresponding gnulib module is not in use. |
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gl_WARN_ON_USE_PREPARE([[#include <signal.h> |
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]], [sigaction sigaddset sigdelset sigemptyset sigfillset sigismember |
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sigpending sigprocmask]) |
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]) |
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AC_DEFUN([gl_SIGNAL_MODULE_INDICATOR], |
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[ |
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dnl Use AC_REQUIRE here, so that the default settings are expanded once only. |
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AC_REQUIRE([gl_SIGNAL_H_DEFAULTS]) |
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gl_MODULE_INDICATOR_SET_VARIABLE([$1]) |
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dnl Define it also as a C macro, for the benefit of the unit tests. |
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gl_MODULE_INDICATOR_FOR_TESTS([$1]) |
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]) |
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AC_DEFUN([gl_SIGNAL_H_DEFAULTS], |
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[ |
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GNULIB_SIGNAL_H_SIGPIPE=0; AC_SUBST([GNULIB_SIGNAL_H_SIGPIPE]) |
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GNULIB_SIGPROCMASK=0; AC_SUBST([GNULIB_SIGPROCMASK]) |
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GNULIB_SIGACTION=0; AC_SUBST([GNULIB_SIGACTION]) |
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dnl Assume proper GNU behavior unless another module says otherwise. |
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HAVE_POSIX_SIGNALBLOCKING=1; AC_SUBST([HAVE_POSIX_SIGNALBLOCKING]) |
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HAVE_SIGSET_T=1; AC_SUBST([HAVE_SIGSET_T]) |
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HAVE_SIGINFO_T=1; AC_SUBST([HAVE_SIGINFO_T]) |
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HAVE_SIGACTION=1; AC_SUBST([HAVE_SIGACTION]) |
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HAVE_STRUCT_SIGACTION_SA_SIGACTION=1; |
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AC_SUBST([HAVE_STRUCT_SIGACTION_SA_SIGACTION]) |
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HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=1; |
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AC_SUBST([HAVE_TYPE_VOLATILE_SIG_ATOMIC_T]) |
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HAVE_SIGHANDLER_T=1; AC_SUBST([HAVE_SIGHANDLER_T]) |
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])
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