dnl MPFR specific autoconf macros dnl Copyright 2000, 2002, 2003, 2004, 2005 Free Software Foundation. dnl Contributed by the Spaces project, INRIA Lorraine. dnl dnl This file is part of the MPFR Library. dnl dnl The 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 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 MPFR Library; see the file COPYING.LIB. If not, write to dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, dnl MA 02111-1307, USA. dnl autoconf 2.50 is necessary because of the use of AH_VERBATIM, dnl but it would be better to make the config file compatible with dnl both autoconf 2.13 and autoconf 2.50. dnl The following line allows the autoconf wrapper (when installed) dnl to work as expected. AC_PREREQ(2.50) dnl FIXME: Buggy? AC_DEFUN([AC_MY_HEADERS], [ if test "$1" then AC_CHECK_HEADER($1/$2, INCLUDES="$INCLUDES -I$1",AC_MSG_ERROR($2 not found in $1)) else AC_CHECK_HEADER($2,, AC_MSG_ERROR($2 not found)) fi ]) AC_DEFUN([AC_CHECK_OS], [ AC_CACHE_CHECK([OS type], mpfr_cv_os_type, [ mpfr_cv_os_type=`uname -s` ]) OS_TYPE=$mpfr_cv_os_type ]) AC_DEFUN([AC_CHECK_MACHTYPE], [ AC_CACHE_CHECK([Mach type], mpfr_cv_mach_type, [ mpfr_cv_mach_type=`uname -m` ]) MACHTYPE=$mpfr_cv_mach_type ]) dnl ------------------------------------------------------------ AC_DEFUN([MPFR_CONFIGS], [ AC_REQUIRE([AC_OBJEXT]) AC_REQUIRE([MPFR_CHECK_LIBM]) AC_REQUIRE([AC_HEADER_TIME]) dnl Check for sizeof size_t dnl AC_CHECK_SIZEOF dnl AC_TYPE_SIZE_T dnl AC_CHECK_FUNCS([memset]) AC_CHECK_FUNCS([strtol]) AC_CHECK_HEADER([limits.h],, AC_MSG_ERROR([limits.h not found])) AC_CHECK_HEADER([float.h],, AC_MSG_ERROR([float.h not found])) dnl Check for stdargs AC_CHECK_HEADER([stdarg.h],[AC_DEFINE([HAVE_STDARG])], [AC_CHECK_HEADER([varargs.h],, AC_MSG_ERROR([stdarg.h or varargs.h not found]))]) AC_CHECK_HEADERS(sys/time.h) # Reasons for testing: # gettimeofday - not in mingw # AC_CHECK_FUNCS(gettimeofday) AC_REPLACE_FUNCS(strcasecmp strncasecmp) 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 $mpfr_cv_ieee_switches" fi esac # Reasons for testing: # sys/fpu.h - MIPS specific # AC_CHECK_HEADERS(sys/fpu.h) AC_CHECK_TYPE( [union fpc_csr], AC_DEFINE(HAVE_FPC_CSR), , [ #if HAVE_SYS_FPU_H # include #endif ]) dnl Check for fesetround AC_CACHE_CHECK([for fesetround], mpfr_cv_have_fesetround, [ saved_LIBS="$LIBS" LIBS="$LIBS $MPFR_LIBM" AC_TRY_LINK([#include ], [fesetround(FE_TONEAREST);], mpfr_cv_have_fesetround=yes, mpfr_cv_have_fesetround=no) LIBS="$saved_LIBS" ]) if test "$mpfr_cv_have_fesetround" = "yes"; then AC_DEFINE(MPFR_HAVE_FESETROUND,1,[Define if you have the `fesetround' function via the header file.]) fi dnl Check whether 0/0, 1/0, -1/0, sqrt(-1) are valid expressions AC_CACHE_CHECK([for valid NaN], mpfr_cv_valid_nan, [ saved_LIBS="$LIBS" LIBS="$LIBS $MPFR_LIBM" AC_TRY_RUN([ #include int main() { double x = (0.0/0.0) + sqrt(-1.0); return x == 1.0/0.0; } ], mpfr_cv_valid_nan=yes, mpfr_cv_valid_nan=no, mpfr_cv_valid_nan=no) ]) if test "$mpfr_cv_valid_nan" = "yes"; then AC_DEFINE(HAVE_INFS,1,[Define if 0/0, 1/0, -1/0 and sqrt(-1) work to generate NaN/infinities.]) fi LIBS="$saved_LIBS" dnl Check for gcc float-conversion bug; if need be, -ffloat-store is used to dnl force the conversion to the destination type when a value is stored to dnl a variable (see ISO C99 standard 5.1.2.3#13, 6.3.1.5#2, 6.3.1.8#2). This dnl is important concerning the exponent range. Note that this doesn't solve dnl the double-rounding problem (x86 processors still have to be set to the dnl IEEE-754 compatible rounding mode). if test -n "$GCC"; then AC_CACHE_CHECK([for gcc float-conversion bug], mpfr_cv_gcc_floatconv_bug, [ saved_LIBS="$LIBS" LIBS="$LIBS $MPFR_LIBM" AC_TRY_RUN([ #include #ifdef MPFR_HAVE_FESETROUND #include #endif static double get_max (void); int main() { double x = 0.5; int i; for (i = 1; i <= 11; i++) x *= x; if (x != 0) return 1; #ifdef MPFR_HAVE_FESETROUND /* Useful test for the G4 PowerPC */ fesetround(FE_TOWARDZERO); x = get_max (); x *= 2.0; if (x != get_max ()) return 1; #endif return 0; } static double get_max (void) { return DBL_MAX; } ], [mpfr_cv_gcc_floatconv_bug="no"], [mpfr_cv_gcc_floatconv_bug="yes, use -ffloat-store"], [mpfr_cv_gcc_floatconv_bug="cannot test, use -ffloat-store"]) LIBS="$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 #include 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 "$mpfr_cv_have_denorms" = "yes"; then AC_DEFINE(HAVE_DENORMS,1,[Define if denormalized floats work.]) fi dnl Check if HUGE_VAL is supported without the need of a specific library AC_CACHE_CHECK([for HUGE_VAL], mpfr_cv_have_huge_val, [ AC_TRY_LINK([#include ], [HUGE_VAL;], mpfr_cv_have_huge_val=yes, mpfr_cv_have_huge_val=no) ]) if test "$mpfr_cv_have_huge_val" = "yes"; then AC_DEFINE(HAVE_HUGE_VAL,1,[Define if HUGE_VAL can be used without the need of a specific library.]) fi MPFR_C_LONG_DOUBLE_FORMAT ]) 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 ])