diff options
Diffstat (limited to 'libgcobol/acinclude.m4')
| -rw-r--r-- | libgcobol/acinclude.m4 | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/libgcobol/acinclude.m4 b/libgcobol/acinclude.m4 index ed340c7..aab0895 100644 --- a/libgcobol/acinclude.m4 +++ b/libgcobol/acinclude.m4 @@ -24,3 +24,165 @@ AC_DEFUN([AC_LIBTOOL_DLOPEN],) AC_DEFUN([AC_LIBLTDL_CONVENIENCE],) AC_SUBST(LIBTOOL) ]) + +dnl Check whether we have a __float128 and _Float128 type +dnl Unashamedly plagiarized from libgfortran. + +AC_DEFUN([LIBGCOBOL_CHECK_FLOAT128], [ + LIBQUADSPEC= + LIBQUADLIB= + LIBQUADLIB_DEP= + LIBQUADINCLUDE= + USE_IEC_60559=no + + if test "x$enable_libquadmath_support" = "xno"; then + if test "x$have_iec_60559_libc_support" = "xyes"; then + AC_DEFINE(USE_IEC_60559, 1, [Define if IEC 60559 *f128 APIs should be used for _Float128.]) + fi + else + + AC_CACHE_CHECK([whether we have a usable _Float128 type], + libgcob_cv_have_float128, [ + GCC_TRY_COMPILE_OR_LINK([ + _Float128 foo (_Float128 x) + { + _Complex _Float128 z1, z2; + + z1 = x; + z2 = x / 7.F128; + z2 /= z1; + + return __real__ z2; + } + + _Float128 bar (_Float128 x) + { + return x * __builtin_huge_valf128 (); + } + + __float128 baz (__float128 x) + { + return x * __builtin_huge_valf128 (); + } + ],[ + foo (1.2F128); + bar (1.2F128); + baz (1.2F128); + foo (1.2Q); + bar (1.2Q); + baz (1.2Q); + ],[ + libgcob_cv_have_float128=yes + ],[ + libgcob_cv_have_float128=no +])]) + + if test "x$have_iec_60559_libc_support$enable_libquadmath_support$libgcob_cv_have_float128" = xyesdefaultyes; then + USE_IEC_60559=yes + fi + + if test "x$libgcob_cv_have_float128" = xyes; then + + if test "x$USE_IEC_60559" = xyes; then + AC_DEFINE(USE_IEC_60559, 1, [Define if IEC 60559 *f128 APIs should be used for _Float128.]) + else + AC_DEFINE(USE_QUADMATH, 1, [Define if *q APIs should be used for __float128.]) + fi + AC_DEFINE(HAVE_FLOAT128, 1, [Define if target has usable _Float128 and __float128 types.]) + + dnl Check whether -Wl,--as-needed resp. -Wl,-zignore is supported + dnl + dnl Turn warnings into error to avoid testsuite breakage. So enable + dnl AC_LANG_WERROR, but there's currently (autoconf 2.64) no way to turn + dnl it off again. As a workaround, save and restore werror flag like + dnl AC_PATH_XTRA. + dnl Cf. http://gcc.gnu.org/ml/gcc-patches/2010-05/msg01889.html + ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag + AC_CACHE_CHECK([whether --as-needed/-z ignore works], + [libgcob_cv_have_as_needed], + [ + # Test for native Solaris options first. + # No whitespace after -z to pass it through -Wl. + libgcob_cv_as_needed_option="-zignore" + libgcob_cv_no_as_needed_option="-zrecord" + save_LDFLAGS="$LDFLAGS" + LDFLAGS="$LDFLAGS -Wl,$libgcob_cv_as_needed_option -lm -Wl,$libgcob_cv_no_as_needed_option" + libgcob_cv_have_as_needed=no + AC_LANG_WERROR + AC_LINK_IFELSE([AC_LANG_PROGRAM([])], + [libgcob_cv_have_as_needed=yes], + [libgcob_cv_have_as_needed=no]) + LDFLAGS="$save_LDFLAGS" + if test "x$libgcob_cv_have_as_needed" = xno; then + libgcob_cv_as_needed_option="--as-needed" + libgcob_cv_no_as_needed_option="--no-as-needed" + save_LDFLAGS="$LDFLAGS" + LDFLAGS="$LDFLAGS -Wl,$libgcob_cv_as_needed_option -lm -Wl,$libgcob_cv_no_as_needed_option" + libgcob_cv_have_as_needed=no + AC_LANG_WERROR + AC_LINK_IFELSE([AC_LANG_PROGRAM([])], + [libgcob_cv_have_as_needed=yes], + [libgcob_cv_have_as_needed=no]) + LDFLAGS="$save_LDFLAGS" + fi + ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag + ]) + + dnl Determine -Bstatic ... -Bdynamic etc. support from gfortran -### stderr. + touch conftest1.$ac_objext conftest2.$ac_objext + LQUADMATH=-lquadmath + $CXX -static-libgcobol -### -o conftest \ + conftest1.$ac_objext -lgcobol conftest2.$ac_objext 2>&1 >/dev/null \ + | grep "conftest1.$ac_objext.*conftest2.$ac_objext" > conftest.cmd + if grep "conftest1.$ac_objext.* -Bstatic -lgcobol -Bdynamic .*conftest2.$ac_objext" \ + conftest.cmd >/dev/null 2>&1; then + LQUADMATH="%{static-libquadmath:-Bstatic} -lquadmath %{static-libquadmath:-Bdynamic}" + elif grep "conftest1.$ac_objext.* -bstatic -lgcobol -bdynamic .*conftest2.$ac_objext" \ + conftest.cmd >/dev/null 2>&1; then + LQUADMATH="%{static-libquadmath:-bstatic} -lquadmath %{static-libquadmath:-bdynamic}" + elif grep "conftest1.$ac_objext.* -aarchive_shared -lgcobol -adefault .*conftest2.$ac_objext" \ + conftest.cmd >/dev/null 2>&1; then + LQUADMATH="%{static-libquadmath:-aarchive_shared} -lquadmath %{static-libquadmath:-adefault}" + elif grep "conftest1.$ac_objext.*libgcobol.a .*conftest2.$ac_objext" \ + conftest.cmd >/dev/null 2>&1; then + LQUADMATH="%{static-libquadmath:libquadmath.a%s;:-lquadmath}" + fi + rm -f conftest1.$ac_objext conftest2.$ac_objext conftest conftest.cmd + + dnl For static libgcobol linkage, depend on libquadmath only if needed. + dnl If using *f128 APIs from libc/libm, depend on libquadmath only if needed + dnl even for dynamic libgcobol linkage, and don't link libgcobol against + dnl -lquadmath. + if test "x$libgcob_cv_have_as_needed" = xyes; then + if test "x$USE_IEC_60559" = xyes; then + LIBQUADSPEC="$libgcob_cv_as_needed_option $LQUADMATH $libgcob_cv_no_as_needed_option" + else + LIBQUADSPEC="%{static-libgcobol:$libgcob_cv_as_needed_option} $LQUADMATH %{static-libgcobol:$libgcob_cv_no_as_needed_option}" + fi + else + LIBQUADSPEC="$LQUADMATH" + fi + if test "x$USE_IEC_60559" != xyes; then + if test -f ../libquadmath/libquadmath.la; then + LIBQUADLIB=../libquadmath/libquadmath.la + LIBQUADLIB_DEP=../libquadmath/libquadmath.la + LIBQUADINCLUDE='-I$(srcdir)/../libquadmath' + else + LIBQUADLIB="-lquadmath" + fi + fi + else + if test "x$USE_IEC_60559" = xyes; then + AC_DEFINE(USE_IEC_60559, 1, [Define if IEC 60559 *f128 APIs should be used for _Float128.]) + fi + fi + + fi + + dnl For the spec file + AC_SUBST(LIBQUADSPEC) + AC_SUBST(LIBQUADLIB) + AC_SUBST(LIBQUADLIB_DEP) + AC_SUBST(LIBQUADINCLUDE) + AC_SUBST(USE_IEC_60559) +]) |