gdb: disallow GDB_HOST on external toolchain builds

The cross-gdb is supposed to be part of the external toolchain, so
Buildroot does not need to build it. Moreover, GDB_HOST build
currently fail with:

ln -snf ../../bin/arm-unknown-linux-gnueabi-gdb \
                /home/test/outputs/test-48/staging/usr/arm-unknown-linux-gnueabi/bin/gdb
ln: creating symbolic link `/home/test/outputs/test-48/staging/usr/arm-unknown-linux-gnueabi/bin/gdb': No such file or directory

And even worse: they overwrite the cross-gdb of the external
toolchain!

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

diff --git a/toolchain/gdb/Config.in b/toolchain/gdb/Config.in
index 09701c75e17493bf3b637f939ca971d1de265fc3..edd8715f1f3a8d89cb551ea9def9da31d1bc6c14 100644 (file)
--- a/toolchain/gdb/Config.in
+++ b/toolchain/gdb/Config.in
@@ -18,6 +18,9 @@ config BR2_PACKAGE_GDB_SERVER
 
 config BR2_PACKAGE_GDB_HOST
        bool "Build gdb for the Host"
+       # cross-gdb is supposed to be part of the external
+       # toolchain. And the build currently fails.
+       depends on !BR2_TOOLCHAIN_EXTERNAL
        help
            Build gdb to run on the host to debug programs run on the target.