dnl MPFR specific autoconf macros
dnl Copyright 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
dnl Contributed by the Arenaire and Cacao projects, INRIA.
dnl
dnl This file is part of the GNU MPFR Library.
dnl
dnl The GNU MPFR Library is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU Lesser General Public License as published
dnl by the Free Software Foundation; either version 2.1 of the License, or (at
dnl your option) any later version.
dnl
dnl The GNU MPFR Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
dnl License for more details.
dnl
dnl You should have received a copy of the GNU Lesser General Public License
dnl along with the GNU MPFR Library; see the file COPYING.LIB. If not, write to
dnl the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
dnl MA 02110-1301, USA.
dnl autoconf 2.60 is necessary because of the use of AC_PROG_SED.
dnl The following line allows the autoconf wrapper (when installed)
dnl to work as expected.
AC_PREREQ(2.60)
dnl ------------------------------------------------------------
dnl You must put in MPFR_CONFIGS everything which configure MPFR
dnl except:
dnl -everything dealing with CC and CFLAGS in particular the ABI
dnl but the IEEE-754 specific flags must be set here.
dnl -GMP's linkage.
dnl -Libtool stuff.
dnl -Handling of special arguments of MPFR's configure.
AC_DEFUN([MPFR_CONFIGS],
[
AC_REQUIRE([AC_OBJEXT])
AC_REQUIRE([MPFR_CHECK_LIBM])
AC_REQUIRE([AC_HEADER_TIME])
AC_REQUIRE([AC_CANONICAL_HOST])
AC_CHECK_HEADER([limits.h],, AC_MSG_ERROR([limits.h not found]))
AC_CHECK_HEADER([float.h],, AC_MSG_ERROR([float.h not found]))
AC_CHECK_HEADER([string.h],, AC_MSG_ERROR([string.h not found]))
dnl Check for locales
AC_CHECK_HEADERS([locale.h])
dnl Check for wide characters (wchar_t and wint_t)
AC_CHECK_HEADERS([wchar.h])
dnl Check for stdargs
AC_CHECK_HEADER([stdarg.h],[AC_DEFINE([HAVE_STDARG],1,[Define if stdarg])],
[AC_CHECK_HEADER([varargs.h],,
AC_MSG_ERROR([stdarg.h or varargs.h not found]))])
dnl sys/fpu.h - MIPS specific
AC_CHECK_HEADERS([sys/time.h sys/fpu.h])
dnl SIZE_MAX macro
gl_SIZE_MAX
dnl va_copy macro
AC_MSG_CHECKING([how to copy va_list])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <stdarg.h>
]], [[
va_list ap1, ap2;
va_copy(ap1, ap2);
]])], [
AC_MSG_RESULT([va_copy])
AC_DEFINE(HAVE_VA_COPY)
], [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <stdarg.h>
]], [[
va_list ap1, ap2;
__va_copy(ap1, ap2);
]])], [AC_DEFINE([HAVE___VA_COPY]) AC_MSG_RESULT([__va_copy])],
[AC_MSG_RESULT([memcpy])])])
dnl FIXME: The functions memmove, memset and strtol are really needed by
dnl MPFR, but if they are implemented as macros, this is also OK (in our
dnl case). So, we do not return an error, but their tests are currently
dnl useless.
dnl gettimeofday is not defined for MinGW
AC_CHECK_FUNCS([memmove memset setlocale strtol gettimeofday])
dnl Check for IEEE-754 switches on Alpha
case $host in
alpha*-*-*)
saved_CFLAGS="$CFLAGS"
AC_CACHE_CHECK([for IEEE-754 switches], mpfr_cv_ieee_switches, [
if test -n "$GCC"; then
mpfr_cv_ieee_switches="-mfp-rounding-mode=d -mieee-with-inexact"
else
mpfr_cv_ieee_switches="-fprm d -ieee_with_inexact"
fi
CFLAGS="$CFLAGS $mpfr_cv_ieee_switches"
AC_TRY_COMPILE(,,, mpfr_cv_ieee_switches="none")
])
if test "$mpfr_cv_ieee_switches" = "none"; then
CFLAGS="$saved_CFLAGS"
else
CFLAGS="$saved_CFLAGS $mpfr_cv_ieee_switches"
fi
esac
dnl Check for Core2 processor
case $host in
x86_64-*linux*)
case `sed -n '/^vendor_id/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in
*Intel*) AC_DEFINE(HAVE_HOST_CORE2,1,[Define if processor is Core 2]) ;;
esac
esac
dnl check for long long
AC_CHECK_TYPE([long long int],
AC_DEFINE(HAVE_LONG_LONG, 1, [Define if compiler supports long long]),,)
dnl intmax_t is C99
AC_CHECK_TYPES([intmax_t])
AC_CHECK_TYPE( [union fpc_csr],
AC_DEFINE(HAVE_FPC_CSR,1,[Define if union fpc_csr is available]), ,
[
#if HAVE_SYS_FPU_H
# include <sys/fpu.h>
#endif
])
dnl Check for fesetround
AC_CACHE_CHECK([for fesetround], mpfr_cv_have_fesetround, [
saved_LIBS="$LIBS"
LIBS="$LIBS $MPFR_LIBM"
AC_TRY_LINK([#include <fenv.h>], [fesetround(FE_TONEAREST);],
mpfr_cv_have_fesetround=yes, mpfr_cv_have_fesetround=no)
LIBS="$saved_LIBS"
])
if test "$mpfr_cv_have_fesetround" = "yes"; then
AC_DEFINE(MPFR_HAVE_FESETROUND,1,[Define if you have the `fesetround' function via the <fenv.h> header file.])
fi
dnl Check for gcc float-conversion bug; if need be, -ffloat-store is used to
dnl force the conversion to the destination type when a value is stored to
dnl a variable (see ISO C99 standard 5.1.2.3#13, 6.3.1.5#2, 6.3.1.8#2). This
dnl is important concerning the exponent range. Note that this doesn't solve
dnl the double-rounding problem.
if test -n "$GCC"; then
AC_CACHE_CHECK([for gcc float-conversion bug], mpfr_cv_gcc_floatconv_bug, [
saved_LIBS="$LIBS"
LIBS="$LIBS $MPFR_LIBM"
AC_TRY_RUN([
#include <float.h>
#ifdef MPFR_HAVE_FESETROUND
#include <fenv.h>
#endif
static double get_max (void);
int main() {
double x = 0.5;
double y;
int i;
for (i = 1; i <= 11; i++)
x *= x;
if (x != 0)
return 1;
#ifdef MPFR_HAVE_FESETROUND
/* Useful test for the G4 PowerPC */
fesetround(FE_TOWARDZERO);
x = y = get_max ();
x *= 2.0;
if (x != y)
return 1;
#endif
return 0;
}
static double get_max (void) { static volatile double d = DBL_MAX; return d; }
], [mpfr_cv_gcc_floatconv_bug="no"],
[mpfr_cv_gcc_floatconv_bug="yes, use -ffloat-store"],
[mpfr_cv_gcc_floatconv_bug="cannot test, use -ffloat-store"])
LIBS="$saved_LIBS"
])
if test "$mpfr_cv_gcc_floatconv_bug" != "no"; then
CFLAGS="$CFLAGS -ffloat-store"
fi
fi
dnl Check if denormalized numbers are supported
AC_CACHE_CHECK([for denormalized numbers], mpfr_cv_have_denorms, [
AC_TRY_RUN([
#include <math.h>
#include <stdio.h>
int main() {
double x = 2.22507385850720138309e-308;
fprintf (stderr, "%e\n", x / 2.0);
return 2.0 * (x / 2.0) != x;
}
], mpfr_cv_have_denorms=yes, mpfr_cv_have_denorms=no, mpfr_cv_have_denorms=no)
])
if test "$mpfr_cv_have_denorms" = "yes"; then
AC_DEFINE(HAVE_DENORMS,1,[Define if denormalized floats work.])
fi
dnl Check whether NAN != NAN (as required by the IEEE-754 standard,
dnl but not by the ISO C standard). For instance, this is false with
dnl MIPSpro 7.3.1.3m under IRIX64. By default, assume this is true.
AC_CACHE_CHECK([if NAN == NAN], mpfr_cv_nanisnan, [
AC_TRY_RUN([
#include <stdio.h>
#include <math.h>
#ifndef NAN
# define NAN (0.0/0.0)
#endif
int main() {
double d;
d = NAN;
return d != d;
}
], [mpfr_cv_nanisnan="yes"],
[mpfr_cv_nanisnan="no"],
[mpfr_cv_nanisnan="cannot test, assume no"])
])
if test "$mpfr_cv_nanisnan" = "yes"; then
AC_DEFINE(MPFR_NANISNAN,1,[Define if NAN == NAN.])
AC_MSG_WARN([The test NAN != NAN is false. The probable reason is that])
AC_MSG_WARN([your compiler optimizes floating-point expressions in an])
AC_MSG_WARN([unsafe way because some option, such as -ffast-math or])
AC_MSG_WARN([-fast (depending on the compiler), has been used. You])
AC_MSG_WARN([should NOT use such an option, otherwise MPFR functions])
AC_MSG_WARN([such as mpfr_get_d and mpfr_set_d may return incorrect])
AC_MSG_WARN([results on special FP numbers (e.g. NaN or signed zeros).])
AC_MSG_WARN([If you did not use such an option, please send us a bug])
AC_MSG_WARN([report so that we can try to find a workaround for your])
AC_MSG_WARN([platform and/or document the behavior.])
fi
dnl Check if the chars '0' to '9' are consecutive values
AC_MSG_CHECKING([if charset has consecutive values])
AC_RUN_IFELSE(AC_LANG_PROGRAM([[
char *number = "0123456789";
char *lower = "abcdefghijklmnopqrstuvwxyz";
char *upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
]],[[
int i;
unsigned char *p;
for (p = (unsigned char*) number, i = 0; i < 9; i++)
if ( (*p)+1 != *(p+1) ) return 1;
for (p = (unsigned char*) lower, i = 0; i < 25; i++)
if ( (*p)+1 != *(p+1) ) return 1;
for (p = (unsigned char*) upper, i = 0; i < 25; i++)
if ( (*p)+1 != *(p+1) ) return 1;
]]), [AC_MSG_RESULT(yes)],[
AC_MSG_RESULT(no)
AC_DEFINE(MPFR_NO_CONSECUTIVE_CHARSET,1,[Charset is not consecutive])
], [AC_MSG_RESULT(can not test)])
dnl Must be checked with the LIBM
dnl but we don't want to add the LIBM to MPFR dependency.
dnl Can't use AC_CHECK_FUNCS since the function may be in LIBM but
dnl not exported in math.h
saved_LIBS="$LIBS"
LIBS="$LIBS $MPFR_LIBM"
dnl AC_CHECK_FUNCS([round trunc floor ceil nearbyint])
AC_MSG_CHECKING(for math/round)
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <math.h>
int f (double (*func)(double)) { return 0;}
]], [[
double a = 17.42;
a = f (round);
return 0;
]])], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_ROUND, 1,[Have ISO-C99 round function])
],[AC_MSG_RESULT(no)])
AC_MSG_CHECKING(for math/trunc)
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <math.h>
int f (double (*func)(double)) { return 0;}
]], [[
double a = 17.42;
a = f(trunc);
return 0;
]])], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_TRUNC, 1,[Have ISO-C99 trunc function])
],[AC_MSG_RESULT(no)])
AC_MSG_CHECKING(for math/floor)
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <math.h>
int f (double (*func)(double)) { return 0;}
]], [[
double a = 17.42;
a = f(floor);
return 0;
]])], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_FLOOR, 1,[Have ISO-C99 floor function])
],[AC_MSG_RESULT(no)])
AC_MSG_CHECKING(for math/ceil)
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <math.h>
int f (double (*func)(double)) { return 0;}
]], [[
double a = 17.42;
a = f(ceil);
return 0;
]])], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_CEIL, 1,[Have ISO-C99 ceil function])
],[AC_MSG_RESULT(no)])
AC_MSG_CHECKING(for math/rint)
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <math.h>
int f (double (*func)(double)) { return 0;}
]], [[
double a = 17.42;
a = f(nearbyint);
return 0;
]])], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_NEARBYINT, 1,[Have ISO-C99 rint function])
],[AC_MSG_RESULT(no)])
LIBS="$saved_LIBS"
dnl Now try to check the long double format
MPFR_C_LONG_DOUBLE_FORMAT
dnl Check if thread-local variables are supported.
dnl At least two problems can occur in practice:
dnl 1. The compilation fails, e.g. because the compiler doesn't know
dnl about the __thread keyword.
dnl 2. The compilation succeeds, but the system doesn't support TLS or
dnl there is some ld configuration problem. One of the effects can
dnl be that thread-local variables always evaluate to 0. So, it is
dnl important to run the test below.
if test "$enable_thread_safe" = yes; then
AC_CACHE_CHECK([for TLS support], mpfr_cv_working_tls, [
saved_CPPFLAGS="$CPPFLAGS"
# The -I$srcdir is necessary when objdir is different from srcdir.
CPPFLAGS="$CPPFLAGS -I$srcdir"
AC_RUN_IFELSE([
#define MPFR_USE_THREAD_SAFE 1
#include "mpfr-thread.h"
MPFR_THREAD_ATTR int x = 17;
int main() {
return x != 17;
}
], [mpfr_cv_working_tls="yes"],
[AC_MSG_RESULT(no)
AC_MSG_ERROR([please configure with --disable-thread-safe])],
[mpfr_cv_working_tls="cannot test, assume yes"])
CPPFLAGS="$saved_CPPFLAGS"
])
fi
])
dnl MPFR_C_LONG_DOUBLE_FORMAT
dnl -------------------------
dnl Determine the format of a long double.
dnl
dnl The object file is grepped, so as to work when cross compiling. A
dnl start and end sequence is included to avoid false matches, and
dnl allowance is made for the desired data crossing an "od -b" line
dnl boundary. The test number is a small integer so it should appear
dnl exactly, no rounding or truncation etc.
dnl
dnl "od -b" is supported even by Unix V7, and the awk script used doesn't
dnl have functions or anything, so even an "old" awk should suffice.
dnl
dnl The 10-byte IEEE extended format is generally padded to either 12 or 16
dnl bytes for alignment purposes. The SVR4 i386 ABI is 12 bytes, or i386
dnl gcc -m128bit-long-double selects 16 bytes. IA-64 is 16 bytes in LP64
dnl mode, or 12 bytes in ILP32 mode. The first 10 bytes is the relevant
dnl part in all cases (big and little endian).
dnl
dnl Enhancements:
dnl
dnl Could match more formats, but no need to worry until there's code
dnl wanting to use them.
dnl
dnl Don't want to duplicate the double matching from GMP_C_DOUBLE_FORMAT,
dnl perhaps we should merge with that macro, to match data formats
dnl irrespective of the C type in question. Or perhaps just let the code
dnl use DOUBLE macros when sizeof(double)==sizeof(long double).
AC_DEFUN([MPFR_C_LONG_DOUBLE_FORMAT],
[AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_PROG_AWK])
AC_REQUIRE([AC_OBJEXT])
AC_CHECK_TYPES([long double])
AC_CACHE_CHECK([format of `long double' floating point],
mpfr_cv_c_long_double_format,
[mpfr_cv_c_long_double_format=unknown
if test "$ac_cv_type_long_double" != yes; then
mpfr_cv_c_long_double_format="not available"
else
cat >conftest.c <<\EOF
[
/* "before" is 16 bytes to ensure there's no padding between it and "x".
We're not expecting any "long double" bigger than 16 bytes or with
alignment requirements stricter than 16 bytes. */
struct {
char before[16];
long double x;
char after[8];
} foo = {
{ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
'\001', '\043', '\105', '\147', '\211', '\253', '\315', '\357' },
-123456789.0,
{ '\376', '\334', '\272', '\230', '\166', '\124', '\062', '\020' }
};
]
EOF
mpfr_compile="$CC $CFLAGS $CPPFLAGS -c conftest.c >&AC_FD_CC 2>&1"
if AC_TRY_EVAL(mpfr_compile); then
cat >conftest.awk <<\EOF
[
BEGIN {
found = 0
}
# got[] holds a sliding window of bytes read the input. got[0] is the most
# recent byte read, and got[31] the oldest byte read, so when looking to
# match some data the indices are "reversed".
#
{
for (f = 2; f <= NF; f++)
{
# new byte, shift others up
for (i = 31; i >= 0; i--)
got[i+1] = got[i];
got[0] = $f;
# end sequence
if (got[7] != "376") continue
if (got[6] != "334") continue
if (got[5] != "272") continue
if (got[4] != "230") continue
if (got[3] != "166") continue
if (got[2] != "124") continue
if (got[1] != "062") continue
if (got[0] != "020") continue
# start sequence, with 12-byte body
if (got[27] == "001" && \
got[26] == "043" && \
got[25] == "105" && \
got[24] == "147" && \
got[23] == "211" && \
got[22] == "253" && \
got[21] == "315" && \
got[20] == "357")
{
saw = " (" got[19] \
" " got[18] \
" " got[17] \
" " got[16] \
" " got[15] \
" " got[14] \
" " got[13] \
" " got[12] \
" " got[11] \
" " got[10] \
" " got[9] \
" " got[8] ")"
if (got[19] == "000" && \
got[18] == "000" && \
got[17] == "000" && \
got[16] == "000" && \
got[15] == "240" && \
got[14] == "242" && \
got[13] == "171" && \
got[12] == "353" && \
got[11] == "031" && \
got[10] == "300")
{
print "IEEE extended, little endian"
found = 1
exit
}
}
# start sequence, with 16-byte body
if (got[31] == "001" && \
got[30] == "043" && \
got[29] == "105" && \
got[28] == "147" && \
got[27] == "211" && \
got[26] == "253" && \
got[25] == "315" && \
got[24] == "357")
{
saw = " (" got[23] \
" " got[22] \
" " got[21] \
" " got[20] \
" " got[19] \
" " got[18] \
" " got[17] \
" " got[16] \
" " got[15] \
" " got[14] \
" " got[13] \
" " got[12] \
" " got[11] \
" " got[10] \
" " got[9] \
" " got[8] ")"
if (got[23] == "000" && \
got[22] == "000" && \
got[21] == "000" && \
got[20] == "000" && \
got[19] == "240" && \
got[18] == "242" && \
got[17] == "171" && \
got[16] == "353" && \
got[15] == "031" && \
got[14] == "300")
{
print "IEEE extended, little endian"
found = 1
exit
}
if (got[23] == "300" && \
got[22] == "031" && \
got[21] == "326" && \
got[20] == "363" && \
got[19] == "105" && \
got[18] == "100" && \
got[17] == "000" && \
got[16] == "000" && \
got[15] == "000" && \
got[14] == "000" && \
got[13] == "000" && \
got[12] == "000" && \
got[11] == "000" && \
got[10] == "000" && \
got[9] == "000" && \
got[8] == "000")
{
print "IEEE quad, big endian"
found = 1
exit
}
}
}
}
END {
if (! found)
print "unknown", saw
}
]
EOF
mpfr_cv_c_long_double_format=`od -b conftest.$OBJEXT | $AWK -f conftest.awk`
case $mpfr_cv_c_long_double_format in
unknown*)
echo "cannot match anything, conftest.$OBJEXT contains" >&AC_FD_CC
od -b conftest.$OBJEXT >&AC_FD_CC
;;
esac
else
AC_MSG_WARN([oops, cannot compile test program])
fi
fi
rm -f conftest*
])
AH_VERBATIM([HAVE_LDOUBLE],
[/* Define one of the following to 1 for the format of a `long double'.
If your format is not among these choices, or you don't know what it is,
then leave all undefined.
IEEE_EXT is the 10-byte IEEE extended precision format.
IEEE_QUAD is the 16-byte IEEE quadruple precision format.
LITTLE or BIG is the endianness. */
#undef HAVE_LDOUBLE_IEEE_EXT_LITTLE
#undef HAVE_LDOUBLE_IEEE_QUAD_BIG])
case $mpfr_cv_c_long_double_format in
"IEEE extended, little endian")
AC_DEFINE(HAVE_LDOUBLE_IEEE_EXT_LITTLE, 1)
;;
"IEEE quad, big endian")
AC_DEFINE(HAVE_LDOUBLE_IEEE_QUAD_BIG, 1)
;;
unknown* | "not available")
;;
*)
AC_MSG_WARN([oops, unrecognised float format: $mpfr_cv_c_long_double_format])
;;
esac
])
dnl MPFR_CHECK_LIBM
dnl ---------------
dnl Determine a math library -lm to use.
AC_DEFUN([MPFR_CHECK_LIBM],
[AC_REQUIRE([AC_CANONICAL_HOST])
AC_SUBST(MPFR_LIBM,'')
case $host in
*-*-beos* | *-*-cygwin* | *-*-pw32*)
# According to libtool AC CHECK LIBM, these systems don't have libm
;;
*-*-hpux*)
# -lM means something subtly different to -lm, SVID style error handling
# or something. FIXME: Why exactly do we want this?
AC_CHECK_LIB(M, main, MPFR_LIBM="-lM")
;;
*-*-solaris*)
# On Solaris the math functions new in C99 are in -lm9x.
# FIXME: Do we need -lm9x as well as -lm, or just instead of?
AC_CHECK_LIB(m9x, main, MPFR_LIBM="-lm9x")
AC_CHECK_LIB(m, main, MPFR_LIBM="$MPFR_LIBM -lm")
;;
*-ncr-sysv4.3*)
# FIXME: What does -lmw mean? Libtool AC CHECK LIBM does it this way.
AC_CHECK_LIB(mw, _mwvalidcheckl, MPFR_LIBM="-lmw")
AC_CHECK_LIB(m, main, MPFR_LIBM="$MPFR_LIBM -lm")
;;
*)
AC_CHECK_LIB(m, main, MPFR_LIBM="-lm")
;;
esac
])
dnl MPFR_LD_SEARCH_PATHS_FIRST
dnl --------------------------
AC_DEFUN([MPFR_LD_SEARCH_PATHS_FIRST],
[case "$LD $LDFLAGS" in
*-Wl,-search_paths_first*) ;;
*) AC_MSG_CHECKING([if the compiler understands -Wl,-search_paths_first])
saved_LDFLAGS="$LDFLAGS"
LDFLAGS="-Wl,-search_paths_first $LDFLAGS"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[AC_MSG_RESULT(yes)],
[AC_MSG_RESULT(no)]
LDFLAGS="$saved_LDFLAGS")
;;
esac
])
dnl GMP_C_ATTRIBUTE_MODE
dnl --------------------
dnl Introduced in gcc 2.2, but perhaps not in all Apple derived versions.
dnl Needed for mpfr-longlong.h; this is currently necessary for s390.
dnl
dnl TODO: Replace this with a cleaner type size detection, as this
dnl solution only works with gcc and assumes CHAR_BIT == 8. Probably use
dnl <stdint.h>, and <http://gcc.gnu.org/viewcvs/trunk/config/stdint.m4>
dnl as a fallback.
AC_DEFUN([GMP_C_ATTRIBUTE_MODE],
[AC_CACHE_CHECK([whether gcc __attribute__ ((mode (XX))) works],
gmp_cv_c_attribute_mode,
[AC_TRY_COMPILE([typedef int SItype __attribute__ ((mode (SI)));], ,
gmp_cv_c_attribute_mode=yes, gmp_cv_c_attribute_mode=no)
])
if test $gmp_cv_c_attribute_mode = yes; then
AC_DEFINE(HAVE_ATTRIBUTE_MODE, 1,
[Define to 1 if the compiler accepts gcc style __attribute__ ((mode (XX)))])
fi
])
dnl MPFR_FUNC_GMP_PRINTF_SPEC
dnl ------------------------------------
dnl MPFR_FUNC_GMP_PRINTF_SPEC(spec, type, [includes], [if-true], [if-false])
dnl Check if gmp_sprintf supports the conversion specification 'spec'
dnl with type 'type'.
dnl Expand 'if-true' if printf supports 'spec', 'if-false' otherwise.
AC_DEFUN([MPFR_FUNC_GMP_PRINTF_SPEC],[
AC_MSG_CHECKING(if gmp_printf supports "%$1")
AC_RUN_IFELSE([AC_LANG_PROGRAM([[
#include <stdio.h>
$3
#include <gmp.h>
]], [[
char s[256];
$2 a = 17;
if (gmp_sprintf (s, "(%0.0$1)(%d)", a, 42) == -1) return 1;
return (strcmp (s, "(17)(42)") != 0);
]])],
[AC_MSG_RESULT(yes)
$4],
[AC_MSG_RESULT(no)
$5])
])
dnl MPFR_CHECK_PRINTF_SPEC
dnl ----------------------
dnl Check if gmp_printf supports some optional length modifiers.
dnl Defined symbols are negative to shorten the gcc command line.
AC_DEFUN([MPFR_CHECK_PRINTF_SPEC], [
AC_REQUIRE([MPFR_CONFIGS])dnl
if test "$ac_cv_type_intmax_t" = yes; then
MPFR_FUNC_GMP_PRINTF_SPEC([jd], [intmax_t], [
#ifdef HAVE_STDINT_H
# include <stdint.h>
#endif
#ifdef HAVE_INTTYPES_H
# include <inttypes.h>
#endif
],,
[AC_DEFINE([NPRINTF_J], 1, [gmp_printf cannot read intmax_t])])
fi
MPFR_FUNC_GMP_PRINTF_SPEC([hhd], [char], [
#include <gmp.h>
],,
[AC_DEFINE([NPRINTF_HH], 1, [gmp_printf cannot use 'hh' length modifier])])
MPFR_FUNC_GMP_PRINTF_SPEC([lld], [long long int], [
#include <gmp.h>
],,
[AC_DEFINE([NPRINTF_LL], 1, [gmp_printf cannot read long long int])])
MPFR_FUNC_GMP_PRINTF_SPEC([Lf], [long double], [
#include <gmp.h>
],,
[AC_DEFINE([NPRINTF_L], 1, [gmp_printf cannot read long double])])
MPFR_FUNC_GMP_PRINTF_SPEC([td], [ptrdiff_t], [
#if defined (__cplusplus)
#include <cstddef>
#else
#include <stddef.h>
#endif
#include "gmp.h"
],,
[AC_DEFINE([NPRINTF_T], 1, [gmp_printf cannot read ptrdiff_t])])
])