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58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
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# Configure a replacement for <sys/time.h>.
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# Copyright (C) 2007 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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# Written by Paul Eggert and Martin Lambers.
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AC_DEFUN([gl_HEADER_SYS_TIME_H],
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[
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dnl Use AC_REQUIRE here, so that the REPLACE_GETTIMEOFDAY=0 statement
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dnl below is expanded once only, before all REPLACE_GETTIMEOFDAY=1
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dnl statements that occur in other macros.
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AC_REQUIRE([gl_HEADER_SYS_TIME_H_BODY])
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])
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AC_DEFUN([gl_HEADER_SYS_TIME_H_BODY],
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[
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AC_REQUIRE([AC_C_RESTRICT])
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gl_CHECK_NEXT_HEADERS([sys/time.h])
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if test $ac_cv_header_sys_time_h = yes; then
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HAVE_SYS_TIME_H=1
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else
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HAVE_SYS_TIME_H=0
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fi
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AC_SUBST([HAVE_SYS_TIME_H])
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AC_CACHE_CHECK([for struct timeval], [gl_cv_sys_struct_timeval],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[[#if HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#include <time.h>
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]],
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[[static struct timeval x; x.tv_sec = x.tv_usec;]])],
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[gl_cv_sys_struct_timeval=yes],
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[gl_cv_sys_struct_timeval=no])])
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if test $gl_cv_sys_struct_timeval = yes; then
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HAVE_STRUCT_TIMEVAL=1
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else
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HAVE_STRUCT_TIMEVAL=0
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fi
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AC_SUBST([HAVE_STRUCT_TIMEVAL])
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dnl Assume POSIX behavior unless another module says otherwise.
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REPLACE_GETTIMEOFDAY=0
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AC_SUBST([REPLACE_GETTIMEOFDAY])
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if test $HAVE_SYS_TIME_H = 0 || test $HAVE_STRUCT_TIMEVAL = 0; then
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SYS_TIME_H=sys/time.h
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else
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SYS_TIME_H=
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fi
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AC_SUBST([SYS_TIME_H])
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])
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