[Qemu-devel] [patch] Configure check for gcc4

[Qemu-devel] [patch] Configure check for gcc4

[Paul Brook]

[-- Attachment #1: Type: text/plain, Size: 325 bytes --]

Qemu is known to not build properly with gcc4.  Despite this being documented 
in several places users frequent still get it wrong.  This is probably the 
second most frequent question (the first, equally dumb problem being
"I can't make ping work with -user-net").

The attached patch adds a configure check for gcc4.

Paul

[-- Attachment #2: patch.qemu_nogcc4 --]
[-- Type: text/x-diff, Size: 995 bytes --]

=== configure
==================================================================
--- configure	(revision 1789)
+++ configure	(local)
@@ -88,6 +88,7 @@
 kernel_path=""
 cocoa="no"
 check_gfx="yes"
+check_gcc="yes"
 
 # OS specific
 targetos=`uname -s`
@@ -200,6 +201,8 @@
   ;;
   --disable-gfx-check) check_gfx="no"
   ;;
+  --disable-gcc-check) check_gcc="no"
+  ;;
   esac
 done
 
@@ -277,6 +280,23 @@
    have_gcc3_options="yes"
 fi
 
+# Check for gcc4
+if test "$check_gcc" = "yes" ; then
+    cat > $TMPC <<EOF
+#if __GNUC__ >= 4
+#error gcc4
+#endif
+int main(){return 0;}
+EOF
+    if ! $cc -o $TMPO $TMPC 2>/dev/null ; then
+        echo "ERROR: \"$cc\" looks like gcc 4.x"
+        echo "QEMU is known to have problems when compiled with gcc 4.x"
+        echo "It is recommended they you use gcc 3.x to build QEMU"
+        echo "To use this compiler anyway, configure with --disable-gcc-check"
+        exit 1;
+    fi
+fi
+
 ##########################################
 # SDL probe
 

Re: [Qemu-devel] [patch] Configure check for gcc4

[Jan Marten Simons]

Paul Brook wrote:

>+    if ! $cc -o $TMPO $TMPC 2>/dev/null ; then
>+        echo "ERROR: \"$cc\" looks like gcc 4.x"
>+        echo "QEMU is known to have problems when compiled with gcc 4.x"
>+        echo "It is recommended they you use gcc 3.x to build QEMU"
>+        echo "To use this compiler anyway, configure with --disable-gcc-check"
>+        exit 1;
>+    fi
>  
>

Just a little typo:

+        echo "It is recommended that you use gcc 3.x to build QEMU"

RE: [Qemu-devel] [patch] Configure check for gcc4

[Sylvain Petreolle]

I waited this moment since months.
+1 !
--- Paul Brook <paul@codesourcery.com> a écrit :

> Qemu is known to not build properly with gcc4.  Despite this being documented 
> in several places users frequent still get it wrong.  This is probably the 
> second most frequent question (the first, equally dumb problem being
> "I can't make ping work with -user-net").
> 
> The attached patch adds a configure check for gcc4.


Kind regards,
Sylvain Petreolle (aka Usurp)
--- --- --- --- --- --- --- --- --- --- --- --- ---
Tired of a proprietary Windows on your computer ?
Use free ReactOS instead ( http://www.reactos.org )