Adding in vermagic check. This is a little crude, but picks up on the most common...

diff --git a/eclass/linux-mod.eclass b/eclass/linux-mod.eclass
index 91165975bf9546597e30deab3029cbf402ea1521..a77f1b751f585944613f3d8d89d3fb1a57dfc45c 100644 (file)
--- a/eclass/linux-mod.eclass
+++ b/eclass/linux-mod.eclass
@@ -1,6 +1,6 @@
 # Copyright 1999-2004 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
-# $Header: /var/cvsroot/gentoo-x86/eclass/linux-mod.eclass,v 1.52 2005/09/22 14:13:36 johnm Exp $
+# $Header: /var/cvsroot/gentoo-x86/eclass/linux-mod.eclass,v 1.53 2005/10/22 16:55:17 johnm Exp $
 
 # Description: This eclass is used to interface with linux-info in such a way
 #              to provide the functionality required and initial functions
@@ -94,6 +94,43 @@ DEPEND="virtual/linux-sources
 # eclass utilities
 # ----------------------------------
 
+check_vermagic() {
+       local curr_gcc_ver=$(gcc -dumpversion)
+       local tmpfile old_chost old_gcc_ver result=0
+
+       tmpfile=`find ${KV_DIR} -iname "*.o.cmd" -exec grep usr/lib/gcc {} \; -quit`
+       tmpfile=${tmpfile//*usr/lib}
+       tmpfile=${tmpfile//\/include*}
+       old_chost=${tmpfile//*gcc\/}
+       old_chost=${old_chost//\/*}
+       old_gcc_ver=${tmpfile//*\/}
+
+       if [[ ${curr_gcc_ver} != ${old_gcc_ver} ]]; then
+               ewarn ""
+               ewarn "The version of GCC you are using (${curr_gcc_ver}) does"
+               ewarn "not match the version of GCC used to compile the"
+               ewarn "kernel (${old_gcc_ver})."
+               result=1
+       elif [[ ${CHOST} != ${old_chost} ]]; then
+               ewarn ""
+               ewarn "The current CHOST (${CHOST}) does not match the chost"
+               ewarn "used when compiling the kernel (${old_chost})."
+               result=1
+       elif [[ -z ${old_gcc_ver} || -z ${old_chost} ]]; then
+               ewarn ""
+               ewarn "Unable to detect what version of GCC was used to compile"
+               ewarn "the kernel. Build will continue, but you may experience problems."
+       fi
+
+       if [[ ${result} -gt 0 ]]; then
+               ewarn ""
+               ewarn "Build will not continue, because you will experience problems."
+               ewarn "To fix this either change the version of GCC you wish to use"
+               ewarn "to match the kernel, or recompile the kernel first."
+               die "GCC Version Mismatch."
+       fi
+}
+
 unpack_pcmcia_sources() {
        # So while the two eclasses exist side-by-side and also the ebuilds inherit
        # both we need to check for PCMCIA_SOURCE_DIR, and if we find it, then we
@@ -422,6 +459,7 @@ linux-mod_pkg_setup() {
        check_kernel_built;
        check_modules_supported;
        set_kvobj;
+       check_vermagic;
 }
 
 linux-mod_src_compile() {