toolchain: control vendor part in GNU_TARGET_NAME

This option allows to customize the "vendor" part of the
toolchain tuple, where the toolchain tuple has the form
<arch>-<vendor>-<os>-<libc>. Use this option in situations
where gcc might make different decisions based on the vendor
part of the tuple.

[Thomas: move the config option in a slightly different place, so that
it does not appear between the C library selection and the C library
options.]

Signed-off-by: "Noam Camus" <noamc@ezchip.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

diff --git a/package/Makefile.in b/package/Makefile.in
index 1f5cbcd186b25fa3e889789f4e01727a1e23effe..0830cd5db9df3e9dd586e9ed121057b19d4b9973 100644 (file)
--- a/package/Makefile.in
+++ b/package/Makefile.in
@@ -20,8 +20,23 @@ endif
 MAKE1:=$(HOSTMAKE) -j1
 MAKE:=$(HOSTMAKE) $(if $(PARALLEL_JOBS),-j$(PARALLEL_JOBS))
 
+ifeq ($(BR2_TOOLCHAIN_BUILDROOT),y)
+TARGET_VENDOR = $(call qstrip,$(BR2_TOOLCHAIN_BUILDROOT_VENDOR))
+else
+TARGET_VENDOR = buildroot
+endif
+
+# Sanity checks
+ifeq ($(TARGET_VENDOR),)
+$(error BR2_TOOLCHAIN_BUILDROOT_VENDOR is not allowed to be empty)
+endif
+ifeq ($(TARGET_VENDOR),unknown)
+$(error BR2_TOOLCHAIN_BUILDROOT_VENDOR cannot be 'unknown'. \
+        It might be confused with the native toolchain)
+endif
+
 # Compute GNU_TARGET_NAME
-GNU_TARGET_NAME=$(ARCH)-buildroot-$(TARGET_OS)-$(LIBC)$(ABI)
+GNU_TARGET_NAME=$(ARCH)-$(TARGET_VENDOR)-$(TARGET_OS)-$(LIBC)$(ABI)
 
 # Blackfin FLAT needs uclinux
 ifeq ($(BR2_bfin)$(BR2_BINFMT_FLAT),yy)

diff --git a/toolchain/toolchain-buildroot/Config.in b/toolchain/toolchain-buildroot/Config.in
index 07db50bfcbcf883b67c3b19aaff66329cf64b708..42166d26339ab55741e812dcd21f9a9bc1bbb644 100644 (file)
--- a/toolchain/toolchain-buildroot/Config.in
+++ b/toolchain/toolchain-buildroot/Config.in
@@ -1,6 +1,23 @@
 # Config entries for internal toolchain backend
 
 if BR2_TOOLCHAIN_BUILDROOT
+
+config BR2_TOOLCHAIN_BUILDROOT_VENDOR
+       string "custom toolchain vendor name"
+       default "buildroot"
+       help
+         This option allows to customize the "vendor" part of the
+         toolchain tuple, where the toolchain tuple has the form
+         <arch>-<vendor>-<os>-<libc>. The default value, "buildroot",
+         is fine for most cases, except in very specific situations
+         where gcc might make different decisions based on the vendor
+         part of the tuple. The value "unknown" is not allowed, as the
+         cross-compiling toolchain might then be confused with the
+         native toolchain when the target and host architecture are
+         identical. The value can not be empty either.
+
+         If you're not sure, just leave the default "buildroot" value.
+
 source "package/linux-headers/Config.in.host"
 
 choice