reapply va_arg hacks removal to wprintf

[musl] / configure

diff --git a/configure b/configure
index af8b45f..539c9fc 100755 (executable)
--- a/configure
+++ b/configure
@@ -249,6 +249,7 @@ fi
 #
 tryflag   CFLAGS_TRY  -Werror=unknown-warning-option
 tryflag   CFLAGS_TRY  -Werror=unused-command-line-argument
+tryflag   CFLAGS_TRY  -Werror=ignored-optimization-argument
 tryldflag LDFLAGS_TRY -Werror=unknown-warning-option
 tryldflag LDFLAGS_TRY -Werror=unused-command-line-argument
 
@@ -318,13 +319,14 @@ i?86*) ARCH=i386 ;;
 x86_64-x32*|x32*|x86_64*x32) ARCH=x32 ;;
 x86_64-nt64*) ARCH=nt64 ;;
 x86_64*) ARCH=x86_64 ;;
-mips64*) ARCH=mips64 ;;
+mips64*|mipsisa64*) ARCH=mips64 ;;
 mips*) ARCH=mips ;;
 microblaze*) ARCH=microblaze ;;
 or1k*) ARCH=or1k ;;
 powerpc64*) ARCH=powerpc64 ;;
 powerpc*) ARCH=powerpc ;;
 sh[1-9bel-]*|sh|superh*) ARCH=sh ;;
+s390x*) ARCH=s390x ;;
 unknown) fail "$0: unable to detect target arch; try $0 --target=..." ;;
 *) fail "$0: unknown or unsupported target \"$target\"" ;;
 esac
@@ -503,6 +505,13 @@ tryflag CFLAGS_AUTO -Werror=implicit-int
 tryflag CFLAGS_AUTO -Werror=pointer-sign
 tryflag CFLAGS_AUTO -Werror=pointer-arith
 
+#
+# GCC ignores unused arguements by default, but Clang needs this extra
+# parameter to stop printing warnings about LDFLAGS passed during
+# compiling stage and CFLAGS passed during linking stage.
+#
+tryflag CFLAGS_AUTO -Qunused-arguments
+
 if test "x$warnings" = xyes ; then
 tryflag CFLAGS_AUTO -Wall
 tryflag CFLAGS_AUTO -Wno-parentheses
@@ -601,6 +610,10 @@ trycppif __ILP32__ "$t" && ARCH=x32
 fi
 
 if test "$ARCH" = "arm" ; then
+if trycppif __thumb2__ "$t" ; then
+tryflag CFLAGS_AUTO -Wa,-mimplicit-it=always
+tryflag CFLAGS_AUTO -Wa,-mthumb
+fi
 trycppif __ARMEB__ "$t" && SUBARCH=${SUBARCH}eb
 trycppif __ARM_PCS_VFP "$t" && SUBARCH=${SUBARCH}hf
 # Versions of clang up until at least 3.8 have the wrong constraint codes