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* [newlib-cygwin] libgloss: m68k: switch to AC_NO_EXECUTABLES
@ 2022-02-17 1:25 Michael Frysinger
0 siblings, 0 replies; only message in thread
From: Michael Frysinger @ 2022-02-17 1:25 UTC (permalink / raw)
To: newlib-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=7d565fe0133a8c0ae86c21c515b1aa47a03ddd0c
commit 7d565fe0133a8c0ae86c21c515b1aa47a03ddd0c
Author: Mike Frysinger <vapier@gentoo.org>
Date: Fri Feb 11 06:58:43 2022 -0500
libgloss: m68k: switch to AC_NO_EXECUTABLES
Use this macro rather than hacking up the LDFLAGS settings. This will
make it easier to merge the logic into the top-level which is already
using AC_NO_EXECUTABLES.
Diff:
---
libgloss/m68k/configure | 82 ++++++++++++++++++++++++++++++++++++++++++++--
libgloss/m68k/configure.ac | 10 ++----
2 files changed, 81 insertions(+), 11 deletions(-)
diff --git a/libgloss/m68k/configure b/libgloss/m68k/configure
index f5ecb8280..9420a642b 100755
--- a/libgloss/m68k/configure
+++ b/libgloss/m68k/configure
@@ -582,6 +582,7 @@ PACKAGE_BUGREPORT=
PACKAGE_URL=
ac_unique_file="crt0.S"
+ac_no_link=no
ac_subst_vars='LTLIBOBJS
LIBOBJS
multi_basedir
@@ -2598,11 +2599,11 @@ test "${CCASFLAGS+set}" = set || CCASFLAGS=$CFLAGS
+
+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking target cpu family" >&5
$as_echo_n "checking target cpu family... " >&6; }
TARGET=m68k
-saved_LDFLAGS="$LDFLAGS"
-LDFLAGS="-nostdlib -e main"
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -2934,6 +2935,29 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if { { ac_try="$ac_link"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_link") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; then
+ ac_no_link=no
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
int
main ()
{
@@ -3130,6 +3154,59 @@ $as_echo "$cross_compiling" >&6; }
rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
ac_clean_files=$ac_clean_files_save
+
+else
+ rm -f -r a.out a.exe b.out conftest.$ac_ext conftest.o conftest.obj conftest.dSYM
+ ac_no_link=yes
+ # Setting cross_compile will disable run tests; it will
+ # also disable AC_CHECK_FILE but that's generally
+ # correct if we can't link.
+ cross_compiling=yes
+ EXEEXT=
+ # Check that the compiler produces executables we can run. If not, either
+# the compiler is broken, or we cross compile.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
+$as_echo_n "checking whether we are cross compiling... " >&6; }
+if test "$cross_compiling" != yes; then
+ { { ac_try="$ac_link"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_link") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }
+ if { ac_try='./conftest$ac_cv_exeext'
+ { { case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_try") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }; then
+ cross_compiling=no
+ else
+ if test "$cross_compiling" = maybe; then
+ cross_compiling=yes
+ else
+ { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot run C compiled programs.
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details" "$LINENO" 5; }
+ fi
+ fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
+$as_echo "$cross_compiling" >&6; }
+
+fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
$as_echo_n "checking for suffix of object files... " >&6; }
if ${ac_cv_objext+:} false; then :
@@ -3565,7 +3642,6 @@ if ac_fn_c_try_cpp "$LINENO"; then :
TARGET="fido"
fi
rm -f conftest.err conftest.i conftest.$ac_ext
-LDFLAGS=$saved_LDFLAGS
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $TARGET" >&5
$as_echo "$TARGET" >&6; }
diff --git a/libgloss/m68k/configure.ac b/libgloss/m68k/configure.ac
index 41b49a530..0230e08d8 100644
--- a/libgloss/m68k/configure.ac
+++ b/libgloss/m68k/configure.ac
@@ -30,15 +30,10 @@ AC_SUBST(LD)
AC_PROG_RANLIB
LIB_AM_PROG_AS
+AC_NO_EXECUTABLES
+
AC_MSG_CHECKING([target cpu family])
TARGET=m68k
-dnl Temporarily modify LDFLAGS so that link tests will succeed without
-dnl a C library. Note that we may not have a C librabry yet and that
-dnl autoconf automatically adds script to check whether we can create
-dnl an executable or not.
-dnl
-saved_LDFLAGS="$LDFLAGS"
-LDFLAGS="-nostdlib -e main"
AC_PREPROC_IFELSE([AC_LANG_PROGRAM([#ifndef __mcoldfire__
#error we are not coldfire
#endif])],
@@ -47,7 +42,6 @@ AC_PREPROC_IFELSE([AC_LANG_PROGRAM([#ifndef __mfido__
#error we are not fido
#endif])],
TARGET="fido",)
-LDFLAGS=$saved_LDFLAGS
AC_MSG_RESULT($TARGET)
AC_SUBST(TARGET)
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