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* [newlib-cygwin] newlib: switch to autoconf long double macro
@ 2022-01-21 12:08 Michael Frysinger
0 siblings, 0 replies; only message in thread
From: Michael Frysinger @ 2022-01-21 12:08 UTC (permalink / raw)
To: newlib-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=55e09d5e8c1e9cd7d54952af706341ae45a67e3a
commit 55e09d5e8c1e9cd7d54952af706341ae45a67e3a
Author: Mike Frysinger <vapier@gentoo.org>
Date: Thu Jan 20 22:47:47 2022 -0500
newlib: switch to autoconf long double macro
Now that we require a recent version of autoconf, we can rely on this
macro working. This change was already made to libm, but these other
dirs were missed as I didn't notice it being duplicated in 3 places.
Diff:
---
newlib/configure | 68 +++++++++++++++++++++++++++---------------------
newlib/configure.ac | 35 +++----------------------
newlib/libc/configure | 58 ++++++++++++++++++++++++++---------------
newlib/libc/configure.ac | 21 ++-------------
newlib/newlib.hin | 3 +++
5 files changed, 84 insertions(+), 101 deletions(-)
diff --git a/newlib/configure b/newlib/configure
index 879392da8..2d015dbb6 100755
--- a/newlib/configure
+++ b/newlib/configure
@@ -13315,46 +13315,54 @@ $as_echo "#define _HAVE_CC_INHIBIT_LOOP_TO_LIBCALL 1" >>confdefs.h
fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether long double type exists" >&5
-$as_echo_n "checking whether long double type exists... " >&6; }
-if ${acnewlib_cv_type_long_double+:} false; then :
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for long double" >&5
+$as_echo_n "checking for long double... " >&6; }
+if ${ac_cv_type_long_double+:} false; then :
$as_echo_n "(cached) " >&6
else
- cat > conftest.c <<EOF
-/* Check two ways: float.h defines and direct type declaration. */
-#include <float.h>
-#if defined(LDBL_MANT_DIG)
- #define _HAVE_LONG_DOUBLE
- #else
- #error "LDBL != DBL"
-#endif
-long double test() {
-long double ld = 0.0L;
-return ld;
+ if test "$GCC" = yes; then
+ ac_cv_type_long_double=yes
+ else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+/* The Stardent Vistra knows sizeof (long double), but does
+ not support it. */
+ long double foo = 0.0L;
+int
+main ()
+{
+static int test_array [1 - 2 * !(/* On Ultrix 4.3 cc, long double is 4 and double is 8. */
+ sizeof (double) <= sizeof (long double))];
+test_array [0] = 0;
+return test_array [0];
+
+ ;
+ return 0;
}
-EOF
-if { ac_try='${CC} $CFLAGS $CPPFLAGS -c -o conftest.o conftest.c
- 1>&5'
- { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
- (eval $ac_try) 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; }
-then
- acnewlib_cv_type_long_double=yes;
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_type_long_double=yes
else
- acnewlib_cv_type_long_double=no;
+ ac_cv_type_long_double=no
fi
-rm -f conftest*
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ fi
fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $acnewlib_cv_type_long_double" >&5
-$as_echo "$acnewlib_cv_type_long_double" >&6; }
-if test $acnewlib_cv_type_long_double = yes; then
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_type_long_double" >&5
+$as_echo "$ac_cv_type_long_double" >&6; }
+ if test $ac_cv_type_long_double = yes; then
+
+$as_echo "#define HAVE_LONG_DOUBLE 1" >>confdefs.h
+
+ fi
+
+if test $ac_cv_type_long_double = yes; then
$as_echo "#define _HAVE_LONG_DOUBLE 1" >>confdefs.h
fi
- if test x"$acnewlib_cv_type_long_double" = x"yes"; then
+ if test x"$ac_cv_type_long_double" = x"yes"; then
HAVE_LONG_DOUBLE_TRUE=
HAVE_LONG_DOUBLE_FALSE='#'
else
diff --git a/newlib/configure.ac b/newlib/configure.ac
index b4d11f5e3..c54d2047a 100644
--- a/newlib/configure.ac
+++ b/newlib/configure.ac
@@ -687,39 +687,12 @@ if test $libc_cv_cc_loop_to_function = yes; then
fi
AC_SUBST(libc_cv_cc_loop_to_function)
-dnl Autoconf 2.59 doesn't support the AC_TYPE_LONG_DOUBLE macro. Instead of:
-dnl AC_TYPE_LONG_DOUBLE
-dnl AM_CONDITIONAL(HAVE_LONG_DOUBLE, test x"$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_TYPE_LONG_DOUBLE
+dnl Export the setting for our installed headers to check.
+if test $ac_cv_type_long_double = yes; then
AC_DEFINE(_HAVE_LONG_DOUBLE, 1, [Define if the platform supports long double type.])
fi
-AM_CONDITIONAL(HAVE_LONG_DOUBLE, test x"$acnewlib_cv_type_long_double" = x"yes")
+AM_CONDITIONAL(HAVE_LONG_DOUBLE, test x"$ac_cv_type_long_double" = x"yes")
AC_CACHE_CHECK(whether long double equals double,
newlib_cv_ldbl_eq_dbl, [dnl
diff --git a/newlib/libc/configure b/newlib/libc/configure
index 38eaf7a65..1afafab77 100755
--- a/newlib/libc/configure
+++ b/newlib/libc/configure
@@ -12229,33 +12229,49 @@ fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking Checking long double support" >&5
-$as_echo_n "checking Checking long double support... " >&6; }
-if ${acnewlib_cv_type_long_double+:} false; then :
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for long double" >&5
+$as_echo_n "checking for long double... " >&6; }
+if ${ac_cv_type_long_double+:} false; then :
$as_echo_n "(cached) " >&6
else
- cat > conftest.c <<EOF
-int main() {
-long double x = 0.0L;
-return 0;
+ if test "$GCC" = yes; then
+ ac_cv_type_long_double=yes
+ else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+/* The Stardent Vistra knows sizeof (long double), but does
+ not support it. */
+ long double foo = 0.0L;
+int
+main ()
+{
+static int test_array [1 - 2 * !(/* On Ultrix 4.3 cc, long double is 4 and double is 8. */
+ sizeof (double) <= sizeof (long double))];
+test_array [0] = 0;
+return test_array [0];
+
+ ;
+ return 0;
}
-EOF
-if { ac_try='${CC} $CFLAGS $CPPFLAGS -c conftest.c 1>&5'
- { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
- (eval $ac_try) 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; }
-then
- acnewlib_cv_type_long_double=yes
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ac_cv_type_long_double=yes
else
- acnewlib_cv_type_long_double=no
+ ac_cv_type_long_double=no
fi
-rm -f conftest*
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ fi
fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $acnewlib_cv_type_long_double" >&5
-$as_echo "$acnewlib_cv_type_long_double" >&6; }
- if test x"$acnewlib_cv_type_long_double" = x"yes"; then
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_type_long_double" >&5
+$as_echo "$ac_cv_type_long_double" >&6; }
+ if test $ac_cv_type_long_double = yes; then
+
+$as_echo "#define HAVE_LONG_DOUBLE 1" >>confdefs.h
+
+ fi
+
+ if test x"$ac_cv_type_long_double" = x"yes"; then
HAVE_LONG_DOUBLE_TRUE=
HAVE_LONG_DOUBLE_FALSE='#'
else
diff --git a/newlib/libc/configure.ac b/newlib/libc/configure.ac
index 29a839623..c23282d08 100644
--- a/newlib/libc/configure.ac
+++ b/newlib/libc/configure.ac
@@ -184,25 +184,8 @@ fi
AC_SUBST(LIBC_SYS_LIB)
AC_SUBST(sys_dir)
-dnl Autoconf 2.59 doesn't support the AC_TYPE_LONG_DOUBLE macro. Instead of:
-dnl AC_TYPE_LONG_DOUBLE
-dnl AM_CONDITIONAL(HAVE_LONG_DOUBLE, test x"$ac_cv_type_long_double" = x"yes")
-dnl we specify our own long double test.
-AC_CACHE_CHECK([Checking long double support], [acnewlib_cv_type_long_double],[dnl
-cat > conftest.c <<EOF
-int main() {
-long double x = 0.0L;
-return 0;
-}
-EOF
-if AC_TRY_COMMAND([${CC} $CFLAGS $CPPFLAGS -c conftest.c 1>&AS_MESSAGE_LOG_FD])
-then
- acnewlib_cv_type_long_double=yes
-else
- acnewlib_cv_type_long_double=no
-fi
-rm -f conftest*])
-AM_CONDITIONAL(HAVE_LONG_DOUBLE, test x"$acnewlib_cv_type_long_double" = x"yes")
+AC_TYPE_LONG_DOUBLE
+AM_CONDITIONAL(HAVE_LONG_DOUBLE, test x"$ac_cv_type_long_double" = x"yes")
dnl iconv library will be compiled if --enable-newlib-iconv option is enabled
AM_CONDITIONAL(ENABLE_NEWLIB_ICONV, test x${newlib_iconv} != x)
diff --git a/newlib/newlib.hin b/newlib/newlib.hin
index 69a7cb7a7..feeb409bb 100644
--- a/newlib/newlib.hin
+++ b/newlib/newlib.hin
@@ -14,6 +14,9 @@
/* Define to 1 if you have the <inttypes.h> header file. */
#undef HAVE_INTTYPES_H
+/* Define to 1 if the system has the type `long double'. */
+#undef HAVE_LONG_DOUBLE
+
/* Define to 1 if you have the <memory.h> header file. */
#undef HAVE_MEMORY_H
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