43 lines
1.2 KiB
Plaintext
43 lines
1.2 KiB
Plaintext
# tcgetsid.m4
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# serial 5
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dnl Copyright (C) 2010-2024 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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dnl This file is offered as-is, without any warranty.
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AC_DEFUN([gl_FUNC_TCGETSID],
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[
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AC_REQUIRE([gl_TERMIOS_H_DEFAULTS])
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dnl Persuade glibc <termios.h> to declare tcgetsid().
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AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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AC_CHECK_DECLS([tcgetsid], , , [[#include <termios.h>]])
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if test $ac_cv_have_decl_tcgetsid = no; then
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HAVE_DECL_TCGETSID=0
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fi
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dnl We can't use AC_CHECK_FUNC here, because tcgetsid() is defined as a
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dnl static inline function when compiling for Android 4.4 or older.
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AC_CACHE_CHECK([for tcgetsid], [gl_cv_func_tcgetsid],
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[AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <termios.h>]],
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[[return tcgetsid(0);]])
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],
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[gl_cv_func_tcgetsid=yes],
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[gl_cv_func_tcgetsid=no])
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])
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if test $gl_cv_func_tcgetsid = yes; then
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HAVE_TCGETSID=1
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else
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HAVE_TCGETSID=0
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fi
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])
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# Prerequisites of lib/tcgetsid.c.
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AC_DEFUN([gl_PREREQ_TCGETSID], [
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:
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])
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