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newlib-cygwin/newlib/configure.in
Jeff Johnston de8a5b7810 2009-05-15 Craig Howland <howland@LGSInnovations.com> 
* configure.in:  Add configuration test for long double type existing
        and set flag _HAVE_LONG_DOUBLE if true.  Fix INIT_ARRAY (.init_array)
        and _LDBL_EQ_DBL tests to not link so that will work with
        cross-compilers.
        * configure: Regenerated.
        * Makefile.in: Ditto.
        * newlib.hin: Add _HAVE_LONG_DOUBLE flag.
        * libc/include/math.h:  Change non-builtin defines for HUGE_VAL,
        HUGE_VALF, and HUGE_VALL to be constant expressions.  Add definitions
        for the non-builtin case for INFINITY and NAN.  Gate HUGE_VALL and
        union __ldmath definitions with (new) _HAVE_LONG_DOUBLE.
        *libm/common/s_infconst.c:  Change definitions to use values from
        float.h instead of non-so-portable integer forms.  Mark as being
        deprecated (because now removed from math.h, are not used anywhere
        in Newlib, itself).
2009-05-15 16:15:57 +00:00

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dnl This is the newlib configure.in file.
dnl Process this file with autoconf to produce a configure script.
AC_PREREQ(2.59)
AC_INIT([newlib],[NEWLIB_VERSION])
AC_CONFIG_SRCDIR([libc])
AC_CONFIG_HEADER(newlib.h:newlib.hin)
dnl Can't be done in NEWLIB_CONFIGURE because that confuses automake.
AC_CONFIG_AUX_DIR(..)
dnl Support --enable-newlib-io-pos-args
dnl This option is actually read in libc/configure.in. It is repeated
dnl here so that it shows up in the help text.
AC_ARG_ENABLE(newlib-io-pos-args,
[ --enable-newlib-io-pos-args enable printf-family positional arg support],
[case "${enableval}" in
yes) newlib_io_pos_args=yes ;;
no) newlib_io_pos_args=no ;;
*) AC_MSG_ERROR(bad value ${enableval} for newlib-io-pos-args option) ;;
esac], [newlib_io_pos_args=])dnl
dnl Support --enable-newlib-io-c99-formats
AC_ARG_ENABLE(newlib-io-c99-formats,
[ --enable-newlib-io-c99-formats enable C99 support in IO functions like printf/scanf],
[case "${enableval}" in
yes) newlib_io_c99_formats=yes;;
no) newlib_io_c99_formats=no ;;
*) AC_MSG_ERROR(bad value ${enableval} for newlib-io-c99-formats option) ;;
esac], [newlib_io_c99_formats=])dnl
dnl Support --enable-newlib-io-long-long
AC_ARG_ENABLE(newlib-io-long-long,
[ --enable-newlib-io-long-long enable long long type support in IO functions like printf/scanf],
[case "${enableval}" in
yes) newlib_io_long_long=yes;;
no) newlib_io_long_long=no ;;
*) AC_MSG_ERROR(bad value ${enableval} for newlib-io-long-long option) ;;
esac], [newlib_io_long_long=])dnl
dnl Support --enable-newlib-io-long-double
AC_ARG_ENABLE(newlib-io-long-double,
[ --enable-newlib-io-long-double enable long double type support in IO functions printf/scanf],
[case "${enableval}" in
yes) newlib_io_long_double=yes;;
no) newlib_io_long_double=no ;;
*) AC_MSG_ERROR(bad value ${enableval} for newlib-io-long-double option) ;;
esac], [newlib_io_long_double=])dnl
dnl If multibyte support is enabled, iconv should be enabled too
dnl Support --enable-newlib-mb
AC_ARG_ENABLE(newlib-mb,
[ --enable-newlib-mb enable multibyte support],
[case "${enableval}" in
yes) newlib_mb=yes;;
no) newlib_mb=no ;;
*) AC_MSG_ERROR(bad value ${enableval} for newlib-mb option) ;;
esac], [newlib_mb=])dnl
dnl Support --enable-newlib-iconv-encodings
AC_ARG_ENABLE(newlib-iconv-encodings,
[ --enable-newlib-iconv-encodings enable specific comma-separated list of bidirectional iconv encodings to be built-in],
[if test x${enableval} = x; then
AC_MSG_ERROR(bad value ${enableval} for newlib-iconv-encodings option - use comma-separated encodings list)
fi
iconv_encodings=${enableval}
], [iconv_encodings=])dnl
dnl Support --enable-newlib-iconv-from-encodings
AC_ARG_ENABLE(newlib-iconv-from-encodings,
[ --enable-newlib-iconv-from-encodings enable specific comma-separated list of \"from\" iconv encodings to be built-in],
[if test x${enableval} = x; then
AC_MSG_ERROR(bad value ${enableval} for newlib-iconv-from-encodings option - use comma-separated encodings list)
fi
iconv_from_encodings=${enableval}
], [iconv_from_encodings=])dnl
dnl Support --enable-newlib-iconv-to-encodings
AC_ARG_ENABLE(newlib-iconv-to-encodings,
[ --enable-newlib-iconv-to-encodings enable specific comma-separated list of \"to\" iconv encodings to be built-in],
[if test x${enableval} = x; then
AC_MSG_ERROR(bad value ${enableval} for newlib-iconv-to-encodings option - use comma-separated encodings list)
fi
iconv_to_encodings=${enableval}
], [iconv_to_encodings=])dnl
dnl Support --enable-newlib-iconv-external-ccs
AC_ARG_ENABLE(newlib-iconv-external-ccs,
[ --enable-newlib-iconv-external-ccs enable capabilities to load external CCS files for iconv],
[if test "${newlib_iconv_external_ccs+set}" != set; then
case "${enableval}" in
yes) newlib_iconv_external_ccs=yes ;;
no) newlib_iconv_external_ccs=no ;;
*) AC_MSG_ERROR(bad value ${enableval} for newlib-iconv-external-ccs option) ;;
esac
fi], [newlib_iconv_external_ccs=${newlib_iconv_external_ccs}])dnl
dnl Support --disable-newlib-atexit-dynamic-alloc
AC_ARG_ENABLE(newlib-atexit-dynamic-alloc,
[ --disable-newlib-atexit-alloc disable dynamic allocation of atexit entries],
[if test "${newlib_atexit_dynamic_alloc+set}" != set; then
case "${enableval}" in
yes) newlib_atexit_dynamic_alloc=yes ;;
no) newlib_atexit_dynamic_alloc=no ;;
*) AC_MSG_ERROR(bad value ${enableval} for newlib-atexit-dynamic-alloc option) ;;
esac
fi], [newlib_atexit_dynamic_alloc=${newlib_atexit_dynamic_alloc}])dnl
dnl Support --enable-newlib-reent-small
AC_ARG_ENABLE(newlib-reent-small,
[ --enable-newlib-reent-small enable small reentrant struct support],
[case "${enableval}" in
yes) newlib_reent_small=yes;;
no) newlib_reent_small=no ;;
*) AC_MSG_ERROR(bad value ${enableval} for newlib-reent-small option) ;;
esac], [newlib_reent_small=])dnl
NEWLIB_CONFIGURE(.)
dnl We have to enable libtool after NEWLIB_CONFIGURE because if we try and
dnl add it into NEWLIB_CONFIGURE, executable tests are made before the first
dnl line of the macro which fail because appropriate LDFLAGS are not set.
_LT_DECL_SED
AC_PROG_AWK
if test "${use_libtool}" = "yes"; then
AC_LIBTOOL_WIN32_DLL
AM_PROG_LIBTOOL
fi
AC_ARG_ENABLE(newlib_hw_fp,
[ --enable-newlib-hw-fp Turn on hardware floating point math],
[case "${enableval}" in
yes) newlib_hw_fp=true ;;
no) newlib_hw_fp=false ;;
*) AC_MSG_ERROR(bad value ${enableval} for --enable-newlib-hw-fp) ;;
esac],[newlib_hw_fp=false])
AM_CONDITIONAL(NEWLIB_HW_FP, test x$newlib_hw_fp = xtrue)
# These get added in the top-level configure.in, except in the case where
# newlib is being built natively.
LIBC_INCLUDE_GREP=`echo ${CC} | grep \/libc\/include`
abs_newlib_basedir=`cd ${newlib_basedir} && pwd`
if test -z "${LIBC_INCLUDE_GREP}"; then
CC_FOR_NEWLIB="${CC} -I$PWD/targ-include -I${abs_newlib_basedir}/libc/include"
else
CC_FOR_NEWLIB="${CC}"
fi
AC_SUBST(CC_FOR_NEWLIB)
AC_CONFIG_SUBDIRS(libc)
AC_CONFIG_SUBDIRS(libm)
if test -z "${with_multisubdir}"; then
AC_CONFIG_SUBDIRS(doc)
have_doc=yes
else
have_doc=
fi
AM_CONDITIONAL(HAVE_DOC, test x$have_doc = xyes)
EXTRA_DIRS=
case $host in
i[[34567]]86-pc-linux-*)
AC_CONFIG_SUBDIRS(iconvdata)
EXTRA_DIRS=iconvdata
;;
esac
AC_SUBST(EXTRA_DIRS)
CRT0=
CRT0_DIR=
if test "x${have_crt0}" = "xyes"; then
CRT0=crt0.o
CRT0_DIR=libc/
fi
AC_SUBST(CRT0)
AC_SUBST(CRT0_DIR)
CRT1=${crt1}
CRT1_DIR=
if test -n "${crt1_dir}"; then
CRT1_DIR=${crt1_dir}/
fi
AC_SUBST(CRT1)
AC_SUBST(CRT1_DIR)
if test -n "${libm_machine_dir}"; then
LIBM_MACHINE_OBJECTLIST=libm/machine/${libm_machine_dir}/objectlist.awk.in
fi
AC_SUBST(LIBM_MACHINE_OBJECTLIST)
if test -n "${machine_dir}"; then
MACHINE_OBJECTLIST=libc/machine/${machine_dir}/objectlist.awk.in
fi
AC_SUBST(MACHINE_OBJECTLIST)
if test -n "${sys_dir}"; then
SYS_OBJECTLIST=libc/sys/${sys_dir}/objectlist.awk.in
fi
AC_SUBST(SYS_OBJECTLIST)
if test "${have_sys_mach_dir}" = "yes"; then
SYS_MACH_OBJECTLIST=libc/sys/${sys_dir}/machine/${machine_dir}/objectlist.awk.in
fi
AC_SUBST(SYS_MACH_OBJECTLIST)
if test -n "${posix_dir}"; then
POSIX_OBJECTLIST=libc/${posix_dir}/objectlist.awk.in
fi
AC_SUBST(POSIX_OBJECTLIST)
if test -n "${signal_dir}"; then
SIGNAL_OBJECTLIST=libc/${signal_dir}/objectlist.awk.in
fi
AC_SUBST(SIGNAL_OBJECTLIST)
if test -n "${syscall_dir}"; then
SYSCALL_OBJECTLIST=libc/${syscall_dir}/objectlist.awk.in
fi
AC_SUBST(SYSCALL_OBJECTLIST)
if test -n "${unix_dir}"; then
UNIX_OBJECTLIST=libc/${unix_dir}/objectlist.awk.in
fi
AC_SUBST(UNIX_OBJECTLIST)
if test -n "${stdio64_dir}"; then
STDIO64_OBJECTLIST=libc/${stdio64_dir}/objectlist.awk.in
fi
AC_SUBST(STDIO64_OBJECTLIST)
# Put a plausible default for CC_FOR_BUILD in Makefile.
if test -z "$CC_FOR_BUILD"; then
CC_FOR_BUILD=gcc
fi
AC_SUBST(CC_FOR_BUILD)
if test "${newlib_elix_level}" -gt "0"; then
AC_DEFINE_UNQUOTED(_ELIX_LEVEL,${newlib_elix_level})
fi
if test "${newlib_io_c99_formats}" = "yes"; then
AC_DEFINE_UNQUOTED(_WANT_IO_C99_FORMATS)
fi
if test "${newlib_io_long_long}" = "yes"; then
AC_DEFINE_UNQUOTED(_WANT_IO_LONG_LONG)
fi
if test "${newlib_io_long_double}" = "yes"; then
AC_DEFINE_UNQUOTED(_WANT_IO_LONG_DOUBLE)
fi
if test "${newlib_io_pos_args}" = "yes"; then
AC_DEFINE_UNQUOTED(_WANT_IO_POS_ARGS)
fi
if test "${newlib_reent_small}" = "yes"; then
AC_DEFINE_UNQUOTED(_WANT_REENT_SMALL)
fi
if test "${newlib_mb}" = "yes"; then
AC_DEFINE_UNQUOTED(_MB_CAPABLE)
AC_DEFINE_UNQUOTED(_MB_LEN_MAX,8)
else
AC_DEFINE_UNQUOTED(_MB_LEN_MAX,1)
fi
if test "${newlib_iconv_external_ccs}" = "yes"; then
AC_DEFINE_UNQUOTED(_ICONV_ENABLE_EXTERNAL_CCS)
fi
AC_DEFINE_UNQUOTED(_NEWLIB_VERSION,"NEWLIB_VERSION")
if test "${multilib}" = "yes"; then
multilib_arg="--enable-multilib"
else
multilib_arg=
fi
if test "${newlib_iconv}" = "yes"; then
AC_DEFINE_UNQUOTED(_ICONV_ENABLED,1)
fi
if test "x${newlib_iconv_external_ccs}" = "xyes"; then
if test "x${newlib_iconv}" = "x"; then
AC_MSG_ERROR(--enable-newlib-iconv-external-ccs option can't be used if iconv library is disabled, use --enable-newlib-iconv to enable it.)
fi
AC_DEFINE_UNQUOTED(_ICONV_ENABLE_EXTERNAL_CCS,1)
fi
if test "${newlib_atexit_dynamic_alloc}" = "yes"; then
AC_DEFINE_UNQUOTED(_ATEXIT_DYNAMIC_ALLOC)
fi
dnl
dnl Parse --enable-newlib-iconv-encodings option argument
dnl
if test "x${iconv_encodings}" != "x" \
|| test "x${iconv_to_encodings}" != "x" \
|| test "x${iconv_from_encodings}" != "x"; then
if test "x${newlib_iconv}" = "x"; then
AC_MSG_ERROR([--enable-newlib-iconv-encodings, --enable-newlib-iconv-from-encodings and --enable-newlib-iconv-to-encodings option can't be used if iconv library is disabled, use --enable-newlib-iconv to enable it.])
fi
dnl Normalize encodings names and delete commas
iconv_encodings=`echo "${iconv_encodings}" | sed -e 's/,/ /g' -e 's/-/_/g' -e 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/'`
iconv_to_encodings=`echo "${iconv_to_encodings}" | sed -e 's/,/ /g' -e 's/-/_/g' -e 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/'`
iconv_from_encodings=`echo "${iconv_from_encodings}" | sed -e 's/,/ /g' -e 's/-/_/g' -e 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/'`
dnl Get the list of available encodings excluding comments
dnl Join line with previous if the first character is whitespace
available_encodings=`cat "${srcdir}/libc/iconv/encoding.aliases" | sed -e '/^#.*/d'`
dnl Check if required encodings are supported
dnl Convert aliases to names
dnl iconv_encodings
iconv_encodings1="${iconv_encodings}"
iconv_encodings=""
for encoding in ${iconv_encodings1}; do
result=`echo "${available_encodings}" | grep -e "\(^\| \)${encoding}\( \|\$\)"`
if test $? != "0"; then
AC_MSG_ERROR(${encoding} is not supported - see ${srcdir}/libc/iconv/encoding.aliases file for the list of available encodings)
fi
encoding1=`echo "${result}" | sed -e 's/\(^[[^ ]]*\).*$/\1/'`
iconv_encodings="${iconv_encodings} ${encoding1}"
done
dnl Enable appropriate option in newlib.h
for encoding in ${iconv_encodings}; do
opt=_ICONV_TO_ENCODING_`echo "${encoding}" | sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
AC_DEFINE_UNQUOTED($opt,1)
opt=_ICONV_FROM_ENCODING_`echo "${encoding}" | sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
AC_DEFINE_UNQUOTED($opt,1)
done
dnl iconv_to_encodings
iconv_encodings1="${iconv_to_encodings}"
iconv_to_encodings=""
for encoding in ${iconv_encodings1}; do
result=`echo "${available_encodings}" | grep -e "\(^\| \)${encoding}\( \|\$\)"`
if test $? != "0"; then
AC_MSG_ERROR(${encoding} is not supported - see ${srcdir}/libc/iconv/encoding.aliases file for the list of available encodings)
fi
encoding1=`echo "${result}" | sed -e 's/\(^[[^ ]]*\).*$/\1/'`
iconv_to_encodings="${iconv_to_encodings} ${encoding1}"
done
dnl Enable appropriate option in newlib.h
for encoding in ${iconv_to_encodings}; do
opt=_ICONV_TO_ENCODING_`echo "${encoding}" | sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
AC_DEFINE_UNQUOTED($opt,1)
done
dnl iconv_from_encodings
iconv_encodings1="${iconv_from_encodings}"
iconv_from_encodings=""
for encoding in ${iconv_encodings1}; do
result=`echo "${available_encodings}" | grep -e "\(^\| \)${encoding}\( \|\$\)"`
if test $? != "0"; then
AC_MSG_ERROR(${encoding} is not supported - see ${srcdir}/libc/iconv/encoding.aliases file for the list of available encodings)
fi
encoding1=`echo "${result}" | sed -e 's/\(^[[^ ]]*\).*$/\1/'`
iconv_from_encodings="${iconv_from_encodings} ${encoding1}"
done
dnl Enable appropriate option in newlib.h
for encoding in ${iconv_from_encodings}; do
opt=_ICONV_FROM_ENCODING_`echo "${encoding}" | sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
AC_DEFINE_UNQUOTED($opt,1)
done
fi;
AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
libc_cv_initfinit_array, [dnl
cat > conftest.c <<EOF
int _start (void) { return 0; }
int __start (void) { return 0; }
int foo (void) { return 1; }
int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
EOF
if AC_TRY_COMMAND([${CC} $CFLAGS $CPPFLAGS -c -o conftest conftest.c
1>&AS_MESSAGE_LOG_FD])
then
if ${READELF} -S conftest | grep -e INIT_ARRAY > /dev/null; then
libc_cv_initfinit_array=yes
else
libc_cv_initfinit_array=no
fi
else
libc_cv_initfinit_array=no
fi
rm -f conftest*])
AC_SUBST(libc_cv_initfinit_array)
if test $libc_cv_initfinit_array = yes; then
AC_DEFINE_UNQUOTED(HAVE_INITFINI_ARRAY)
fi
dnl Autoconf 2.59 doesn't support the AC_TYPE_LONG_DOUBLE macro. Instead of:
dnl AC_TYPE_LONG_DOUBLE
dnl AM_CONDITIONAL(HAVE_LONG_DOUBLE, test x"$ac_cv_type_long_double" = x"yes")
dnl we specify our own long double test.
dnl Additionally, ac_cv_objext is broken so that AC_COMPILE_IFELSE cannot be
dnl used, so use AC_TRY_COMMAND instead.
AC_CACHE_CHECK(whether long double type exists,
acnewlib_cv_type_long_double, [dnl
cat > conftest.c <<EOF
/* Check two ways: float.h defines and direct type declaration. */
#include <float.h>
#if defined(LDBL_MANT_DIG)
#define _HAVE_LONG_DOUBLE
#else
#error "LDBL != DBL"
#endif
long double test() {
long double ld = 0.0L;
return ld;
}
EOF
if AC_TRY_COMMAND([${CC} $CFLAGS $CPPFLAGS -c -o conftest.o conftest.c
1>&AS_MESSAGE_LOG_FD])
then
acnewlib_cv_type_long_double=yes;
else
acnewlib_cv_type_long_double=no;
fi
rm -f conftest*])
if test $acnewlib_cv_type_long_double = yes; then
AC_DEFINE_UNQUOTED(_HAVE_LONG_DOUBLE)
fi
AM_CONDITIONAL(HAVE_LONG_DOUBLE, test x"$acnewlib_cv_type_long_double" = x"yes")
AC_CACHE_CHECK(whether long double equals double,
newlib_ldbl_eq_dbl, [dnl
cat > conftest.c <<EOF
#include <float.h>
#if DBL_MANT_DIG == LDBL_MANT_DIG && LDBL_MIN_EXP == DBL_MIN_EXP && \
LDBL_MAX_EXP == DBL_MAX_EXP
#define _LDBL_EQ_DBL
#else
#error "LDBL != DBL"
#endif
EOF
if AC_TRY_COMMAND([${CC} $CFLAGS $CPPFLAGS -c -o conftest.o conftest.c
1>&AS_MESSAGE_LOG_FD])
then
newlib_ldbl_eq_dbl=yes;
else
newlib_ldbl_eq_dbl=no;
fi
rm -f conftest*])
if test $newlib_ldbl_eq_dbl = yes; then
AC_DEFINE_UNQUOTED(_LDBL_EQ_DBL)
fi
AC_CONFIG_FILES([Makefile],
[if test -n "$CONFIG_FILES"; then
unset ac_file
. ${newlib_basedir}/../config-ml.in
fi],
srcdir=${srcdir}
host=${host}
with_multisubdir=${with_multisubdir}
ac_configure_args="${multilib_arg} ${ac_configure_args}"
CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
newlib_basedir=${newlib_basedir}
CC="${CC}"
LDFLAGS="${LDFLAGS}"
)
AC_OUTPUT
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