diff options
Diffstat (limited to 'newlib/configure.in')
| -rw-r--r-- | newlib/configure.in | 44 |
1 files changed, 39 insertions, 5 deletions
diff --git a/newlib/configure.in b/newlib/configure.in index 9ff520100..86b5397c9 100644 --- a/newlib/configure.in +++ b/newlib/configure.in @@ -378,8 +378,8 @@ 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 $LDFLAGS -o conftest conftest.c - -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD]) +if AC_TRY_COMMAND([${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 @@ -395,7 +395,41 @@ if test $libc_cv_initfinit_array = yes; then AC_DEFINE_UNQUOTED(HAVE_INITFINI_ARRAY) fi -AC_CACHE_CHECK(long double equals double, +dnl Autoconf 2.59 doesn't support the AC_TYPE_LONG_DOUBLE macro. Instead of: +dnl AC_TYPE_LONG_DOUBLE +dnl AM_CONDITIONAL(HAVE_LONG_DOUBLE, test x"$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> @@ -406,8 +440,8 @@ cat > conftest.c <<EOF #error "LDBL != DBL" #endif EOF -if AC_TRY_COMMAND([${CC} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c - -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD]) +if AC_TRY_COMMAND([${CC} $CFLAGS $CPPFLAGS -c -o conftest.o conftest.c + 1>&AS_MESSAGE_LOG_FD]) then newlib_ldbl_eq_dbl=yes; else |