buildsystem: check for coreboot toolchain by default

Other toolchains just don't cut it.

Change-Id: I7a0bdf60d89b5166c9a22c9e9f3f326b28f777b8
Signed-off-by: Patrick Georgi <>
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <>
Reviewed-by: Paul Menzel <>
Reviewed-by: Alexandru Gagniuc <>
Reviewed-by: Stefan Reinauer <>
diff --git a/src/Kconfig b/src/Kconfig
index 2f5270e..27f532b 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -70,6 +70,16 @@
+	bool "Allow building with any toolchain"
+	default n
+	depends on COMPILER_GCC
+	help
+	  Many toolchains break when building coreboot since it uses quite
+	  unusual linker features. Unless developers explicitely request it,
+	  we'll have to assume that they use their distro compiler by mistake.
+	  Make sure that using patched compilers is a conscious decision.
 	bool "Build with scan-build for static code analysis"
 	default n