Allow users to override compiler checks for gcc3 by only using --disable-gcc-check as done in qemu

Allow users to override the compiler checks for gcc3 that are required for compatibility with qemu in the same way that qemu does.

If the qemu-cc option is not used but disable-gcc-check is requested then assume that the default system gcc should be used (chosen by name)

This patch fixes sourceforge bug id 1807620

---
 configure |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

index d9292fe..33a56d2 100755
@@ -63,8 +63,12 @@ while [[ "$1" = -* ]]; do
 done
 
 if [[ -z "$qemu_cc" ]]; then
-    echo "$0: cannot locate gcc 3.x. please install it or specify with --qemu-cc"
-    exit 1
+    if [[ -z "$disable_gcc_check" ]]; then
+        echo "$0: cannot locate gcc 3.x. please install it or specify with --qemu-cc"
+        exit 1
+    else
+        qemu_cc=gcc
+    fi
 fi
 
 libkvm_kerneldir="$kerneldir"

1.5.2.5


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This deviates from normal qemu, no? I think qemu-s --disable-gcc-check doesn't imply anything about the compiler.

Do not meddle in the internals of kernels, for they are subtle and quick to panic.


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--disable-gcc-check in qemu's configure just shortcuts all the tests to validate that the compiler to be used is gcc-3.x and that defaults to "gcc"

in the case of kvm's configure, using "gcc" as the default compiler will be the case if :

1) the user didn't provide his own --qemu-cc preference
2) gcc-3.x couldn't be found when searching by name in /usr/bin/

and which is the expected behavior on qemu when --disable-gcc-check is used.

Carlo

PS. ideally host_cc should be by default "${CC}" if defined but using "gcc" is what qemu's configure does so did the same for consistency reasons

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