mirror of git://gcc.gnu.org/git/gcc.git
189 lines
6.5 KiB
Plaintext
189 lines
6.5 KiB
Plaintext
dnl Copyright (C) 2021-2025 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl This program is distributed in the hope that it will be useful,
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dnl but WITHOUT ANY WARRANTY, to the extent permitted by law; without
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dnl even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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dnl PARTICULAR PURPOSE.
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m4_include(../config/acx.m4)
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m4_include(../config/no-executables.m4)
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m4_include(../config/enable.m4)
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m4_include(../config/tls.m4)
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m4_include(../config/bitfields.m4)
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m4_include(../libtool.m4)
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dnl The lines below arrange for aclocal not to bring an installed
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dnl libtool.m4 into aclocal.m4, while still arranging for automake to
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dnl add a definition of LIBTOOL to Makefile.in.
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ifelse(yes,no,[
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AC_DEFUN([AM_PROG_LIBTOOL],)
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AC_DEFUN([AC_LIBTOOL_DLOPEN],)
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AC_DEFUN([AC_LIBLTDL_CONVENIENCE],)
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AC_SUBST(LIBTOOL)
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])
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dnl Check whether we have a __float128 and _Float128 type
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dnl Unashamedly plagiarized from libgfortran.
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AC_DEFUN([LIBGCOBOL_CHECK_FLOAT128], [
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LIBQUADSPEC=
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LIBQUADLIB=
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LIBQUADLIB_DEP=
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LIBQUADINCLUDE=
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USE_IEC_60559=no
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if test "x$enable_libquadmath_support" = "xno"; then
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if test "x$have_iec_60559_libc_support" = "xyes"; then
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AC_DEFINE(USE_IEC_60559, 1, [Define if IEC 60559 *f128 APIs should be used for _Float128.])
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fi
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else
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AC_CACHE_CHECK([whether we have a usable _Float128 type],
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libgcob_cv_have_float128, [
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GCC_TRY_COMPILE_OR_LINK([
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#if __LDBL_MANT_DIG__ == 113 && __LDBL_MIN_EXP__ == -16381
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#error "long double is IEEE quad, no need for libquadmath"
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#endif
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_Float128 foo (_Float128 x)
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{
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_Complex _Float128 z1, z2;
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z1 = x;
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z2 = x / 7.F128;
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z2 /= z1;
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return __real__ z2;
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}
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_Float128 bar (_Float128 x)
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{
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return x * __builtin_huge_valf128 ();
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}
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__float128 baz (__float128 x)
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{
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return x * __builtin_huge_valf128 ();
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}
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],[
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foo (1.2F128);
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bar (1.2F128);
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baz (1.2F128);
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foo (1.2Q);
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bar (1.2Q);
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baz (1.2Q);
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],[
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libgcob_cv_have_float128=yes
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],[
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libgcob_cv_have_float128=no
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])])
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if test "x$have_iec_60559_libc_support$enable_libquadmath_support$libgcob_cv_have_float128" = xyesdefaultyes; then
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USE_IEC_60559=yes
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fi
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if test "x$libgcob_cv_have_float128" = xyes; then
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if test "x$USE_IEC_60559" = xyes; then
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AC_DEFINE(USE_IEC_60559, 1, [Define if IEC 60559 *f128 APIs should be used for _Float128.])
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else
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AC_DEFINE(USE_QUADMATH, 1, [Define if *q APIs should be used for __float128.])
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fi
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AC_DEFINE(HAVE_FLOAT128, 1, [Define if target has usable _Float128 and __float128 types.])
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if test "x$USE_IEC_60559" != xyes; then
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dnl Check whether -Wl,--as-needed resp. -Wl,-zignore is supported
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dnl
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dnl Turn warnings into error to avoid testsuite breakage. So enable
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dnl AC_LANG_WERROR, but there's currently (autoconf 2.64) no way to turn
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dnl it off again. As a workaround, save and restore werror flag like
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dnl AC_PATH_XTRA.
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dnl Cf. http://gcc.gnu.org/ml/gcc-patches/2010-05/msg01889.html
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ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag
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AC_CACHE_CHECK([whether --as-needed/-z ignore works],
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[libgcob_cv_have_as_needed],
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[
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# Test for native Solaris options first.
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# No whitespace after -z to pass it through -Wl.
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libgcob_cv_as_needed_option="-zignore"
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libgcob_cv_no_as_needed_option="-zrecord"
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save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -Wl,$libgcob_cv_as_needed_option -lm -Wl,$libgcob_cv_no_as_needed_option"
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libgcob_cv_have_as_needed=no
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AC_LANG_WERROR
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AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
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[libgcob_cv_have_as_needed=yes],
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[libgcob_cv_have_as_needed=no])
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LDFLAGS="$save_LDFLAGS"
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if test "x$libgcob_cv_have_as_needed" = xno; then
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libgcob_cv_as_needed_option="--as-needed"
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libgcob_cv_no_as_needed_option="--no-as-needed"
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save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -Wl,$libgcob_cv_as_needed_option -lm -Wl,$libgcob_cv_no_as_needed_option"
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libgcob_cv_have_as_needed=no
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AC_LANG_WERROR
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AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
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[libgcob_cv_have_as_needed=yes],
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[libgcob_cv_have_as_needed=no])
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LDFLAGS="$save_LDFLAGS"
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fi
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ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag
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])
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dnl Determine -Bstatic ... -Bdynamic etc. support from gfortran -### stderr.
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touch conftest1.$ac_objext conftest2.$ac_objext
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LQUADMATH=-lquadmath
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$CXX -static-libgcobol -### -o conftest \
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conftest1.$ac_objext -lgcobol conftest2.$ac_objext 2>&1 >/dev/null \
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| grep "conftest1.$ac_objext.*conftest2.$ac_objext" > conftest.cmd
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if grep "conftest1.$ac_objext.* -Bstatic -lgcobol -Bdynamic .*conftest2.$ac_objext" \
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conftest.cmd >/dev/null 2>&1; then
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LQUADMATH="%{static-libquadmath:-Bstatic} -lquadmath %{static-libquadmath:-Bdynamic}"
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elif grep "conftest1.$ac_objext.* -bstatic -lgcobol -bdynamic .*conftest2.$ac_objext" \
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conftest.cmd >/dev/null 2>&1; then
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LQUADMATH="%{static-libquadmath:-bstatic} -lquadmath %{static-libquadmath:-bdynamic}"
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elif grep "conftest1.$ac_objext.* -aarchive_shared -lgcobol -adefault .*conftest2.$ac_objext" \
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conftest.cmd >/dev/null 2>&1; then
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LQUADMATH="%{static-libquadmath:-aarchive_shared} -lquadmath %{static-libquadmath:-adefault}"
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elif grep "conftest1.$ac_objext.*libgcobol.a .*conftest2.$ac_objext" \
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conftest.cmd >/dev/null 2>&1; then
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LQUADMATH="%{static-libquadmath:libquadmath.a%s;:-lquadmath}"
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fi
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rm -f conftest1.$ac_objext conftest2.$ac_objext conftest conftest.cmd
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if test "x$libgcob_cv_have_as_needed" = xyes; then
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if test "x$USE_IEC_60559" = xyes; then
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LIBQUADSPEC="$libgcob_cv_as_needed_option $LQUADMATH $libgcob_cv_no_as_needed_option"
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else
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LIBQUADSPEC="%{static-libgcobol:$libgcob_cv_as_needed_option} $LQUADMATH %{static-libgcobol:$libgcob_cv_no_as_needed_option}"
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fi
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else
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LIBQUADSPEC="$LQUADMATH"
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fi
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if test -f ../libquadmath/libquadmath.la; then
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LIBQUADLIB=../libquadmath/libquadmath.la
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LIBQUADLIB_DEP=../libquadmath/libquadmath.la
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LIBQUADINCLUDE='-I$(srcdir)/../libquadmath'
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else
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LIBQUADLIB="-lquadmath"
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fi
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fi
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else
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if test "x$USE_IEC_60559" = xyes; then
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AC_DEFINE(USE_IEC_60559, 1, [Define if IEC 60559 *f128 APIs should be used for _Float128.])
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fi
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fi
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fi
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dnl For the spec file
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AC_SUBST(LIBQUADSPEC)
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AC_SUBST(LIBQUADLIB)
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AC_SUBST(LIBQUADLIB_DEP)
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AC_SUBST(LIBQUADINCLUDE)
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AC_SUBST(USE_IEC_60559)
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])
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