objtool: Validate disassembler headers in libopcodes probegrafted

commit 3f2de814c059 ("objtool: Fix libopcodes linking with static libraries")
tested for libopcodes availability by linking a test snippet with a forward
declaration of disassemble_init_for_target().

However, testing symbol linkage with an extern declaration only verifies
the presence of the library (.so/.a) and bypasses checking for development
headers (binutils-dev). On systems where libopcodes is present without
development headers installed, the probe succeeds, enabling BUILD_DISAS.
Subsequent compilation of objtool then fails:

  fatal error: 'bfd.h' file not found
    113 | #include <bfd.h>

Additionally, the probe invokes $(HOSTCC) without $(HOSTCFLAGS), ignoring
any sysroot or include flags specified for the host compiler.

Fix this by including <bfd.h> and <dis-asm.h> directly in the test snippet,
passing $(HOSTCFLAGS) so host compiler options are respected, and defining
PACKAGE="objtool" to satisfy the configuration check in <bfd.h>.

Fixes: 3f2de814c059 ("objtool: Fix libopcodes linking with static libraries")
Fixes: 436326bc525d ("objtool: fix build failure due to missing libopcodes check")
Reported-by: Alice Ryhl <aliceryhl@google.com>
Assisted-by: Antigravity:Gemini-Next
Signed-off-by: Ulises Mendez Martinez <umendez@google.com>
Link: https://patch.msgid.link/20260904150710.2997558-1-umendez@google.com
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>

1 files changed, 108 insertions, 0 deletions

diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
new file mode 100644
index 000000000..2b1153d35
--- /dev/null
+++ b/drivers/net/ethernet/Makefile
@@ -0,0 +1,108 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux network Ethernet device drivers.
+#
+
+obj-$(CONFIG_NET_VENDOR_3COM) += 3com/
+obj-$(CONFIG_NET_VENDOR_8390) += 8390/
+obj-$(CONFIG_NET_VENDOR_ACTIONS) += actions/
+obj-$(CONFIG_NET_VENDOR_ADAPTEC) += adaptec/
+obj-$(CONFIG_GRETH) += aeroflex/
+obj-$(CONFIG_NET_VENDOR_ADI) += adi/
+obj-$(CONFIG_NET_VENDOR_AGERE) += agere/
+obj-$(CONFIG_NET_VENDOR_AIROHA) += airoha/
+obj-$(CONFIG_NET_VENDOR_ALACRITECH) += alacritech/
+obj-$(CONFIG_NET_VENDOR_ALIBABA) += alibaba/
+obj-$(CONFIG_NET_VENDOR_ALLWINNER) += allwinner/
+obj-$(CONFIG_ALTERA_TSE) += altera/
+obj-$(CONFIG_NET_VENDOR_AMAZON) += amazon/
+obj-$(CONFIG_NET_VENDOR_AMD) += amd/
+obj-$(CONFIG_NET_XGENE) += apm/
+obj-$(CONFIG_NET_VENDOR_APPLE) += apple/
+obj-$(CONFIG_NET_VENDOR_AQUANTIA) += aquantia/
+obj-$(CONFIG_NET_VENDOR_ARC) += arc/
+obj-$(CONFIG_NET_VENDOR_ASIX) += asix/
+obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/
+obj-$(CONFIG_NET_VENDOR_CADENCE) += cadence/
+obj-$(CONFIG_NET_VENDOR_BROADCOM) += broadcom/
+obj-$(CONFIG_NET_VENDOR_BROCADE) += brocade/
+obj-$(CONFIG_NET_CALXEDA_XGMAC) += calxeda/
+obj-$(CONFIG_NET_VENDOR_CAVIUM) += cavium/
+obj-$(CONFIG_NET_VENDOR_CHELSIO) += chelsio/
+obj-$(CONFIG_NET_VENDOR_CIRRUS) += cirrus/
+obj-$(CONFIG_NET_VENDOR_CISCO) += cisco/
+obj-$(CONFIG_NET_VENDOR_CORTINA) += cortina/
+obj-$(CONFIG_CX_ECAT) += ec_bhf.o
+obj-$(CONFIG_DM9000) += davicom/
+obj-$(CONFIG_NET_VENDOR_DEC) += dec/
+obj-$(CONFIG_NET_VENDOR_DLINK) += dlink/
+obj-$(CONFIG_NET_VENDOR_EMULEX) += emulex/
+obj-$(CONFIG_NET_VENDOR_ENGLEDER) += engleder/
+obj-$(CONFIG_NET_VENDOR_EZCHIP) += ezchip/
+obj-$(CONFIG_NET_VENDOR_FARADAY) += faraday/
+obj-$(CONFIG_NET_VENDOR_FREESCALE) += freescale/
+obj-$(CONFIG_NET_VENDOR_FUNGIBLE) += fungible/
+obj-$(CONFIG_NET_VENDOR_GOOGLE) += google/
+obj-$(CONFIG_NET_VENDOR_HISILICON) += hisilicon/
+obj-$(CONFIG_NET_VENDOR_HUAWEI) += huawei/
+obj-$(CONFIG_NET_VENDOR_IBM) += ibm/
+obj-$(CONFIG_NET_VENDOR_INTEL) += intel/
+obj-$(CONFIG_NET_VENDOR_I825XX) += i825xx/
+obj-$(CONFIG_NET_VENDOR_MICROSOFT) += microsoft/
+obj-$(CONFIG_NET_VENDOR_XSCALE) += xscale/
+obj-$(CONFIG_JME) += jme.o
+obj-$(CONFIG_KORINA) += korina.o
+obj-$(CONFIG_LANTIQ_ETOP) += lantiq_etop.o
+obj-$(CONFIG_LANTIQ_XRX200) += lantiq_xrx200.o
+obj-$(CONFIG_NET_VENDOR_LITEX) += litex/
+obj-$(CONFIG_NET_VENDOR_MARVELL) += marvell/
+obj-$(CONFIG_NET_VENDOR_MEDIATEK) += mediatek/
+obj-$(CONFIG_NET_VENDOR_MELLANOX) += mellanox/
+obj-$(CONFIG_NET_VENDOR_META) += meta/
+obj-$(CONFIG_NET_VENDOR_MICREL) += micrel/
+obj-$(CONFIG_NET_VENDOR_MICROCHIP) += microchip/
+obj-$(CONFIG_NET_VENDOR_MICROSEMI) += mscc/
+obj-$(CONFIG_NET_VENDOR_MOXART) += moxa/
+obj-$(CONFIG_NET_VENDOR_MUCSE) += mucse/
+obj-$(CONFIG_NET_VENDOR_MYRI) += myricom/
+obj-$(CONFIG_FEALNX) += fealnx.o
+obj-$(CONFIG_NET_VENDOR_NATSEMI) += natsemi/
+obj-$(CONFIG_NET_VENDOR_NETRONOME) += netronome/
+obj-$(CONFIG_NET_VENDOR_NI) += ni/
+obj-$(CONFIG_NET_VENDOR_NVIDIA) += nvidia/
+obj-$(CONFIG_LPC_ENET) += nxp/
+obj-$(CONFIG_NET_VENDOR_OKI) += oki-semi/
+obj-$(CONFIG_ETHOC) += ethoc.o
+obj-$(CONFIG_NET_VENDOR_PASEMI) += pasemi/
+obj-$(CONFIG_NET_VENDOR_QLOGIC) += qlogic/
+obj-$(CONFIG_NET_VENDOR_QUALCOMM) += qualcomm/
+obj-$(CONFIG_NET_VENDOR_REALTEK) += realtek/
+obj-$(CONFIG_NET_VENDOR_RENESAS) += renesas/
+obj-$(CONFIG_NET_VENDOR_RDC) += rdc/
+obj-$(CONFIG_NET_VENDOR_ROCKER) += rocker/
+obj-$(CONFIG_NET_VENDOR_SAMSUNG) += samsung/
+obj-$(CONFIG_NET_VENDOR_SEEQ) += seeq/
+obj-$(CONFIG_NET_VENDOR_SILAN) += silan/
+obj-$(CONFIG_NET_VENDOR_SIS) += sis/
+obj-$(CONFIG_NET_VENDOR_SOLARFLARE) += sfc/
+obj-$(CONFIG_NET_VENDOR_SGI) += sgi/
+obj-$(CONFIG_NET_VENDOR_SMSC) += smsc/
+obj-$(CONFIG_NET_VENDOR_SOCIONEXT) += socionext/
+obj-$(CONFIG_NET_VENDOR_SPACEMIT) += spacemit/
+obj-$(CONFIG_NET_VENDOR_STMICRO) += stmicro/
+obj-$(CONFIG_NET_VENDOR_SUN) += sun/
+obj-$(CONFIG_NET_VENDOR_SUNPLUS) += sunplus/
+obj-$(CONFIG_NET_VENDOR_TEHUTI) += tehuti/
+obj-$(CONFIG_NET_VENDOR_TI) += ti/
+obj-$(CONFIG_NET_VENDOR_TOSHIBA) += toshiba/
+obj-$(CONFIG_NET_VENDOR_TUNDRA) += tundra/
+obj-$(CONFIG_NET_VENDOR_VERTEXCOM) += vertexcom/
+obj-$(CONFIG_NET_VENDOR_VIA) += via/
+obj-$(CONFIG_NET_VENDOR_WANGXUN) += wangxun/
+obj-$(CONFIG_NET_VENDOR_WIZNET) += wiznet/
+obj-$(CONFIG_NET_VENDOR_XILINX) += xilinx/
+obj-$(CONFIG_NET_VENDOR_XIRCOM) += xircom/
+obj-$(CONFIG_NET_VENDOR_SYNOPSYS) += synopsys/
+obj-$(CONFIG_NET_VENDOR_PENSANDO) += pensando/
+obj-$(CONFIG_OA_TC6) += oa_tc6.o
+obj-$(CONFIG_NET_VENDOR_ZTE) += zte/