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# Process this file with autoconf to produce a configure script, like so:
# aclocal && autoconf && autoheader && automake
AC_PREREQ(2.59)
AC_INIT([GNU Fortran Runtime Library], 0.2,,[libgfortran])
AC_CONFIG_HEADER(config.h)
# -------
# Options
# -------
AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
AC_ARG_ENABLE(version-specific-runtime-libs,
[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
[case "$enableval" in
yes) version_specific_libs=yes ;;
no) version_specific_libs=no ;;
*) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
esac],
[version_specific_libs=no])
AC_MSG_RESULT($version_specific_libs)
# Gets build, host, target, *_vendor, *_cpu, *_os, etc.
#
# You will slowly go insane if you do not grok the following fact: when
# building this library, the top-level /target/ becomes the library's /host/.
#
# configure then causes --target to default to --host, exactly like any
# other package using autoconf. Therefore, 'target' and 'host' will
# always be the same. This makes sense both for native and cross compilers
# just think about it for a little while. :-)
#
# Also, if this library is being configured as part of a cross compiler, the
# top-level configure script will pass the "real" host as $with_cross_host.
#
# Do not delete or change the following two lines. For why, see
# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
AC_CANONICAL_SYSTEM
target_alias=${target_alias-$host_alias}
# Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
# 1.8.2: minimum required version
# no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
# of other PACKAGE_* variables will, however, and there's nothing
# we can do about that; they come from AC_INIT).
# foreign: we don't follow the normal rules for GNU packages (no COPYING
# file in the top srcdir, etc, etc), so stop complaining.
# no-dependencies: turns off auto dependency generation (just for now)
# -Wall: turns on all automake warnings...
# -Wno-portability: ...except this one, since GNU make is required.
AM_INIT_AUTOMAKE([1.8.2 no-define foreign no-dependencies -Wall -Wno-portability])
AM_MAINTAINER_MODE
AM_ENABLE_MULTILIB(, ..)
# Handy for debugging:
#AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5
# Are we being configured with some form of cross compiler?
# NB: We don't actually need to know this just now, but when, say, a test
# suite is included, we'll have to know.
if test "$build" != "$host"; then
LIBGFOR_IS_NATIVE=false
GCC_NO_EXECUTABLES
else
LIBGFOR_IS_NATIVE=true
fi
# Process the option "--enable-version-specific-runtime-libs"
gcc_version_trigger=${srcdir}/../gcc/version.c
gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([[^ \"]]*\)[[ \"]].*/\1/'`
gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
AC_SUBST(gcc_version)
# Calculate toolexeclibdir
# Also toolexecdir, though it's only used in toolexeclibdir
case ${version_specific_libs} in
yes)
# Need the gcc compiler version to know where to install libraries
# and header files if --enable-version-specific-runtime-libs option
# is selected.
toolexecdir='$(libdir)/gcc/$(target_alias)'
toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)'
;;
no)
if test -n "$with_cross_host" &&
test x"$with_cross_host" != x"no"; then
# Install a library built with a cross compiler in tooldir, not libdir.
toolexecdir='$(exec_prefix)/$(target_alias)'
toolexeclibdir='$(toolexecdir)/lib'
else
toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
toolexeclibdir='$(libdir)'
fi
multi_os_directory=`$CC -print-multi-os-directory`
case $multi_os_directory in
.) ;; # Avoid trailing /.
*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
esac
;;
esac
AC_SUBST(toolexecdir)
AC_SUBST(toolexeclibdir)
# Check the compiler.
# The same as in boehm-gc and libstdc++. Have to borrow it from there.
# We must force CC to /not/ be precious variables; otherwise
# the wrong, non-multilib-adjusted value will be used in multilibs.
# As a side effect, we have to subst CFLAGS ourselves.
m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
m4_define([_AC_ARG_VAR_PRECIOUS],[])
AC_PROG_CC
m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
AC_SUBST(CFLAGS)
# Add -Wall if we are using GCC.
if test "x$GCC" = "xyes"; then
CFLAGS="$CFLAGS -Wall"
fi
# Find other programs we need.
AC_CHECK_TOOL(AS, as)
AC_CHECK_TOOL(AR, ar)
AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
AC_PROG_MAKE_SET
AC_PROG_INSTALL
# Configure libtool
#AC_MSG_NOTICE([====== Starting libtool configuration])
AC_LIBTOOL_DLOPEN
AM_PROG_LIBTOOL
AC_SUBST(enable_shared)
AC_SUBST(enable_static)
#AC_MSG_NOTICE([====== Finished libtool configuration]) ; sleep 10
# We need gfortran to compile parts of the library
# We can't use AC_PROG_F77 because it expects a fully working gfortran.
#AC_PROG_F77(gfortran)
F77="$GFORTRAN"
AC_PROG_F77(gfortran)
FFLAGS="$FFLAGS -Wall -fno-repack-arrays -fno-underscoring"
AC_SYS_LARGEFILE
AC_FUNC_MMAP
AC_TYPE_OFF_T
# check header files
AC_STDC_HEADERS
AC_HAVE_HEADERS(stdlib.h stdio.h string.h stddef.h math.h unistd.h)
AC_CHECK_HEADERS(time.h sys/params.h sys/time.h sys/times.h sys/resource.h)
AC_CHECK_HEADER([complex.h],[AC_DEFINE([HAVE_COMPLEX_H], [1], [complex.h exists])])
# Check for complex math functions
AC_CHECK_LIB([m],[csin],[need_math="no"],[need_math="yes"])
# Check for library functions.
AC_CHECK_FUNCS(getrusage times)
# Check for some C99 functions
AC_CHECK_LIB([m],[round],[AC_DEFINE([HAVE_ROUND],[1],["c99 function"])])
AC_CHECK_LIB([m],[roundf],[AC_DEFINE([HAVE_ROUNDF],[1],["c99 function"])])
# And other IEEE math functions
AC_CHECK_LIB([m],[nextafter],[AC_DEFINE([HAVE_NEXTAFTER],[1],[libm includes nextafter])])
AC_CHECK_LIB([m],[nextafterf],[AC_DEFINE([HAVE_NEXTAFTERF],[1],[libm includes nextafterf])])
# Let the user override this
AC_ARG_ENABLE(cmath,
AC_HELP_STRING([--enable-cmath],[Include complex math functions]),
[need_math=$enableval])
if test "$need_math" = "yes"; then
AC_MSG_NOTICE([Including complex math functions in libgfor]);
extra_math_obj='$(gfor_cmath_obj)'
fi
AC_SUBST([MATH_OBJ],["$extra_math_obj"])
# The standard autoconf HAVE_STRUCT_TIMEZONE doesn't actually check
# for struct timezone, as you might think. We also need to check how
# to call gettimeofday if we have it.
LIBGFOR_GETTIMEOFDAY
AC_CACHE_SAVE
if test ${multilib} = yes; then
multilib_arg="--enable-multilib"
else
multilib_arg=
fi
# Write our Makefile.
AC_CONFIG_FILES(Makefile)
AC_OUTPUT
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