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From: Thomas De Schampheleire <patrickdepinguin@gmail.com>
To: buildroot@buildroot.org
Cc: romain.naour@gmail.com, "Yann E. MORIN" <yann.morin.1998@free.fr>,
	Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Subject: [Buildroot] [PATCHv2 4/7] perf: fix compilation in case of i386 userspace with x86_64 kernel
Date: Sat, 15 Jan 2022 21:03:02 +0100	[thread overview]
Message-ID: <20220115200306.14037-5-patrickdepinguin@gmail.com> (raw)
In-Reply-To: <20220115200306.14037-1-patrickdepinguin@gmail.com>

From: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>

If a 64-bit kernel is combined with 32-bit userspace, and this is achieved
via a multilib toolchain that defaults to 64-bit with '-m32' in
BR2_TARGET_OPTIMIZATION, the '<cross>-ld' command will still default to
64-bit output.

In this case, packages that use 'ld' directly need to be instructed to use
the correct ABI via the '-m' parameter. 'perf' is one such package.

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
---
 package/linux-tools/linux-tool-perf.mk.in | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/package/linux-tools/linux-tool-perf.mk.in b/package/linux-tools/linux-tool-perf.mk.in
index 4e28129f50..b84b5fd415 100644
--- a/package/linux-tools/linux-tool-perf.mk.in
+++ b/package/linux-tools/linux-tool-perf.mk.in
@@ -45,6 +45,9 @@ PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf32ltsmipn32"
 else
 PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf64ltsmip"
 endif
+# case for x86 toolchain that defaults to 64-bit output
+else ifeq ($(BR2_i386):$(call qstrip,$(BR2_KERNEL_ARCH_OVERRIDE)),y:x86_64)
+PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf_i386"
 endif
 
 # The call to backtrace() function fails for ARC, because for some
-- 
2.32.0

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  parent reply	other threads:[~2022-01-15 20:04 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-15 20:02 [Buildroot] [PATCHv2 0/7] Basic support for 64-bit kernel and 32-bit userland Thomas De Schampheleire
2022-01-15 20:02 ` [Buildroot] [PATCHv2 1/7] arch: move definition of KERNEL_ARCH to Config.in.<arch> files Thomas De Schampheleire
2022-02-08 20:25   ` Arnout Vandecappelle
2022-01-15 20:03 ` [Buildroot] [PATCHv2 2/7] core: introduce NORMALIZED_ARCH as non-kernel replacement for KERNEL_ARCH Thomas De Schampheleire
2022-02-08 20:26   ` Arnout Vandecappelle
2022-01-15 20:03 ` [Buildroot] [PATCHv2 3/7] core: introduce BR2_KERNEL_ARCH_OVERRIDE Thomas De Schampheleire
2022-01-15 20:03 ` Thomas De Schampheleire [this message]
2022-01-15 20:03 ` [Buildroot] [PATCHv2 5/7] package/qemu: add support for overridden KERNEL_ARCH=x86_64 Thomas De Schampheleire
2022-01-15 20:03 ` [Buildroot] [PATCHv2 6/7] configs: add new qemu defconfig 'x86_multilib' Thomas De Schampheleire
2022-01-18 11:19   ` Thomas De Schampheleire
2022-01-18 11:51     ` Romain Naour
2022-01-18 12:02       ` Thomas De Schampheleire
2022-01-19 20:54         ` Romain Naour
2022-01-15 20:03 ` [Buildroot] [PATCHv2 7/7] linux/linux.mk: correct LINUX_ARCH_PATH for sparc64 Thomas De Schampheleire
2022-02-08 20:28   ` Arnout Vandecappelle
2022-02-08 20:49 ` [Buildroot] [PATCHv2 0/7] Basic support for 64-bit kernel and 32-bit userland Arnout Vandecappelle
2022-02-09 11:55   ` Thomas De Schampheleire
2022-07-30 19:43 ` Yann E. MORIN

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