182 lines
5.1 KiB
Plaintext
182 lines
5.1 KiB
Plaintext
# @synopsis AX_C99_FLEXIBLE_ARRAY
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#
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# Does the compiler support the 1999 ISO C Standard "struct hack".
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# @version 1.1 Mar 15 2004
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# @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
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#
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# Permission to use, copy, modify, distribute, and sell this file for any
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# purpose is hereby granted without fee, provided that the above copyright
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# and this permission notice appear in all copies. No representations are
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# made about the suitability of this software for any purpose. It is
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# provided "as is" without express or implied warranty.
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AC_DEFUN([AX_C99_FLEXIBLE_ARRAY],
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[AC_CACHE_CHECK(C99 struct flexible array support,
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ac_cv_c99_flexible_array,
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# Initialize to unknown
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ac_cv_c99_flexible_array=no
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AC_TRY_LINK([[
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#include <stdlib.h>
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typedef struct {
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int k;
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char buffer [] ;
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} MY_STRUCT ;
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]],
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[ MY_STRUCT *p = calloc (1, sizeof (MY_STRUCT) + 42); ],
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ac_cv_c99_flexible_array=yes,
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ac_cv_c99_flexible_array=no
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))]
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) # AX_C99_FLEXIBLE_ARRAY
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# @synopsis AX_C99_FUNC_LRINT
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#
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# Check whether C99's lrint function is available.
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# @version 1.3 Feb 12 2002
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# @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
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#
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# Permission to use, copy, modify, distribute, and sell this file for any
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# purpose is hereby granted without fee, provided that the above copyright
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# and this permission notice appear in all copies. No representations are
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# made about the suitability of this software for any purpose. It is
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# provided "as is" without express or implied warranty.
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#
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AC_DEFUN([AX_C99_FUNC_LRINT],
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[AC_CACHE_CHECK(for lrint,
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ac_cv_c99_lrint,
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[
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lrint_save_CFLAGS=$CFLAGS
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CFLAGS="-lm"
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AC_TRY_LINK([
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#define _ISOC9X_SOURCE 1
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#define _ISOC99_SOURCE 1
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#define __USE_ISOC99 1
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#define __USE_ISOC9X 1
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#include <math.h>
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], if (!lrint(3.14159)) lrint(2.7183);, ac_cv_c99_lrint=yes, ac_cv_c99_lrint=no)
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CFLAGS=$lrint_save_CFLAGS
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])
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if test "$ac_cv_c99_lrint" = yes; then
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AC_DEFINE(HAVE_LRINT, 1,
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[Define if you have C99's lrint function.])
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fi
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])# AX_C99_FUNC_LRINT
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# @synopsis AX_C99_FUNC_LRINTF
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#
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# Check whether C99's lrintf function is available.
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# @version 1.3 Feb 12 2002
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# @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
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#
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# Permission to use, copy, modify, distribute, and sell this file for any
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# purpose is hereby granted without fee, provided that the above copyright
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# and this permission notice appear in all copies. No representations are
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# made about the suitability of this software for any purpose. It is
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# provided "as is" without express or implied warranty.
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#
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AC_DEFUN([AX_C99_FUNC_LRINTF],
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[AC_CACHE_CHECK(for lrintf,
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ac_cv_c99_lrintf,
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[
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lrintf_save_CFLAGS=$CFLAGS
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CFLAGS="-lm"
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AC_TRY_LINK([
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#define _ISOC9X_SOURCE 1
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#define _ISOC99_SOURCE 1
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#define __USE_ISOC99 1
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#define __USE_ISOC9X 1
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#include <math.h>
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], if (!lrintf(3.14159)) lrintf(2.7183);, ac_cv_c99_lrintf=yes, ac_cv_c99_lrintf=no)
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CFLAGS=$lrintf_save_CFLAGS
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])
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if test "$ac_cv_c99_lrintf" = yes; then
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AC_DEFINE(HAVE_LRINTF, 1,
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[Define if you have C99's lrintf function.])
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fi
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])# AX_C99_FUNC_LRINTF
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# @synopsis AX_C99_FUNC_LLRINT
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#
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# Check whether C99's llrint function is available.
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# @version 1.1 Sep 30 2002
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# @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
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#
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# Permission to use, copy, modify, distribute, and sell this file for any
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# purpose is hereby granted without fee, provided that the above copyright
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# and this permission notice appear in all copies. No representations are
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# made about the suitability of this software for any purpose. It is
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# provided "as is" without express or implied warranty.
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#
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AC_DEFUN([AX_C99_FUNC_LLRINT],
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[AC_CACHE_CHECK(for llrint,
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ac_cv_c99_llrint,
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[
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llrint_save_CFLAGS=$CFLAGS
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CFLAGS="-lm"
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AC_TRY_LINK([
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#define ISOC9X_SOURCE 1
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#define _ISOC99_SOURCE 1
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#define __USE_ISOC99 1
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#define __USE_ISOC9X 1
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#include <math.h>
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], long long int x ; x = llrint(3.14159) ;, ac_cv_c99_llrint=yes, ac_cv_c99_llrint=no)
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CFLAGS=$llrint_save_CFLAGS
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])
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if test "$ac_cv_c99_llrint" = yes; then
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AC_DEFINE(HAVE_LLRINT, 1,
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[Define if you have C99's llrint function.])
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fi
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])# AX_C99_FUNC_LLRINT
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# @synopsis AX_C99_FUNC_LLRINTF
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#
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# Check whether C99's llrintf function is available.
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# @version 1.1 Sep 30 2002
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# @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
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#
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# Permission to use, copy, modify, distribute, and sell this file for any
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# purpose is hereby granted without fee, provided that the above copyright
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# and this permission notice appear in all copies. No representations are
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# made about the suitability of this software for any purpose. It is
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# provided "as is" without express or implied warranty.
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#
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AC_DEFUN([AX_C99_FUNC_LLRINTF],
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[AC_CACHE_CHECK(for llrintf,
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ac_cv_c99_llrintf,
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[
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llrintf_save_CFLAGS=$CFLAGS
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CFLAGS="-lm"
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AC_TRY_LINK([
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#define _ISOC9X_SOURCE 1
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#define _ISOC99_SOURCE 1
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#define __USE_ISOC99 1
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#define __USE_ISOC9X 1
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#include <math.h>
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], long long int x ; x = llrintf(3.14159) ;, ac_cv_c99_llrintf=yes, ac_cv_c99_llrintf=no)
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CFLAGS=$llrintf_save_CFLAGS
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])
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if test "$ac_cv_c99_llrintf" = yes; then
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AC_DEFINE(HAVE_LLRINTF, 1,
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[Define if you have C99's llrintf function.])
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fi
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])# AX_C99_FUNC_LLRINTF
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