Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752675Ab2E3TkI (ORCPT ); Wed, 30 May 2012 15:40:08 -0400 Received: from mail-yx0-f174.google.com ([209.85.213.174]:45613 "EHLO mail-yx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752258Ab2E3TkE (ORCPT ); Wed, 30 May 2012 15:40:04 -0400 Message-ID: <1338406801.23168.74.camel@shawn-ssd> Subject: Re: include/linux/dynamic_debug.h:111:2: error: implicit declaration of function =?UTF-8?Q?=E2=80=98strstr=E2=80=99?= From: shawn To: Jim Cromie , Russell King Cc: Jason Baron , linux-kernel , linux-arm@vger.kernel.org Date: Wed, 30 May 2012 12:40:01 -0700 In-Reply-To: References: <1338334286.2658.536.camel@shawn-ssd> <1338342203.2658.544.camel@shawn-ssd> <1338387021.23168.18.camel@shawn-ssd> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 8bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7564 Lines: 207 summary: the recently added to arm, CONFIG_KERNEL_XZ is broken because arch/arm/boot/compressed/decompress.c defines _LINUX_STRING_H overriding used in include/linux/dynamic_debug.h:111 On Wed, 2012-05-30 at 11:53 -0600, Jim Cromie wrote: > On Wed, May 30, 2012 at 8:10 AM, shawn wrote: > > On Wed, 2012-05-30 at 02:35 -0600, Jim Cromie wrote: > >> On Tue, May 29, 2012 at 7:43 PM, shawn wrote: > >> > jim, > >> > On Tue, 2012-05-29 at 19:11 -0600, Jim Cromie wrote: > >> >> On Tue, May 29, 2012 at 5:31 PM, shawn wrote: > >> >> > SHIPPED arch/arm/boot/compressed/lib1funcs.S > >> >> > In file included from include/linux/kernel.h:23:0, > >> >> > from > >> >> > arch/arm/boot/compressed/../../../../lib/xz/xz_private.h:15, > >> >> > from > >> >> > arch/arm/boot/compressed/../../../../lib/decompress_unxz.c:145, > >> >> > from arch/arm/boot/compressed/decompress.c:50: > >> >> > include/linux/dynamic_debug.h: In function > >> >> > ‘ddebug_dyndbg_module_param_cb’: > >> >> > include/linux/dynamic_debug.h:111:2: error: implicit declaration of > >> >> > function ‘strstr’ [-Werror=implicit-function-declaration] > >> >> > > >> >> > git blame shows b48420c1d3019ce8d84fb8e58f4ca86b8e3655b8 as introducing > >> >> > this call > >> >> > >> >> that symbol should have been provided by line 100 > >> >> > >> >> 98 #else > >> >> 99 > >> >> 100 #include > >> >> 101 #include > >> >> ... > >> >> 108 static inline int ddebug_dyndbg_module_param_cb(char *param, char *val, > >> >> 109 const char *modname) > >> >> 110 { > >> >> 111 if (strstr(param, "dyndbg")) { > >> > > >> >> which has: > >> >> > >> >> 74 #ifndef __HAVE_ARCH_STRSTR > >> >> 75 extern char * strstr(const char *, const char *); > >> >> 76 #endif > >> >> does your arch have __HAVE_ARCH_STRSTR ? > >> >> if so, is strstr exported under different conditions ?? > >> > a git grep __HAVE_ARCH_STRSTR did not show and such defines in the arm > >> > tree > >> > >> thats odd - you should have gotten the generic one then. > >> > >> >> Can you send me > >> >> arch/arm/boot/compressed/decompress.i ? > >> > I didn't have that file after the failure, but > >> > >> nor would you with success, but you did the right thing below.. > >> > >> > make arch/arm/boot/compressed/decompress.i > >> > > >> > summoned it, also including string.o from that folder (which was present > >> > after the failure) > >> > > >> > I am compiling on amd64, using > >> > export ARCH=arm > >> > and > >> > CONFIG_CROSS_COMPILE="arm-linux-gnueabi-" > >> > > >> > > >> > I have had issues with the cross compiler not always being called since > >> > the 3.5 merge window opened up, (ld reporting corrupted binary files and > >> > gcc saying it doesn't understand arm-specific flags) and have not yet > >> > compiled a post-v3.4 successful kernel. This could be a symptom of that. > >> > (esp as the host arch, x86 DOES have __HAVE_ARCH_STRSTR) > >> > > >> > >> hmm > >> CONFIG_CROSS_COMPILE is new in 3.5-rc isnt it ? > >> what happens if you do it the old (3.4) way ? > > No, CONFIG_CROSS_COMPILE is not new, I've been doing it this way for a > > few versions, before with the emdebian cross toolchain. in meuconfig it > > shows up under: General Config --> Cross-compiler tool prefix > > Ah yes - I see its not new (far from it) > > commit 84336466011c589b6af554f2f2f1fcfa1a5c1437 > Author: Roland McGrath > Date: Mon Dec 21 16:24:06 2009 -0800 > > kconfig CROSS_COMPILE option > > > > This is the arm toolchain that is in the Ubuntu repos. > > > > http://packages.ubuntu.com/precise/gcc-4.6-arm-linux-gnueabi > > I went ahead and installed the arm toolchain from kernel.org, > and got what look to be errors like you mentioned: > > [jimc@groucho linux-2.6-dep]$ make > make[1]: Nothing to be done for `all'. > make[1]: Nothing to be done for `relocs'. > CHK include/linux/version.h > CHK include/generated/utsrelease.h > CC kernel/bounds.s > cc1: error: unrecognized command line option '-m64' > cc1: error: unrecognized command line option '-mno-red-zone' > cc1: error: unrecognized command line option '-mcmodel=kernel' > cc1: error: unrecognized command line option '-maccumulate-outgoing-args' > make[1]: *** [kernel/bounds.s] Error 1 > make: *** [prepare0] Error 2 > > this is with toolchain dir in the front of the path, after doing > make ARCH=arm defconfig > make xconfig # and adding the cross-compile value > > I got much further when I kept ARCH=arm as make arg; > it completed the build. Youre getting it from the environment, > which should be the same, but its worth a try... > > [jimc@groucho linux-2.6-dep]$ file vmlinux* > vmlinux: ELF 32-bit LSB executable, ARM, version 1, statically > linked, not stripped > vmlinux.o: ELF 32-bit LSB relocatable, ARM, version 1, not stripped > > FWIW, this was an in-src build, my attempt at O=../build-arm spat at me. > > > > And I have successfully built kernels with this toolchain, and the > > debian native arm 4.6 compiler, at the same time, using distcc. (however > > I turned both distcc and ccache off for the error I sent) > > > > After having the issues with 3.5, I reinstalled, well parts of the tools > > chain with apt-get install --reinstall. > > > > What is the old way to cross-compile? > > from the config help text: > > Same as running 'make CROSS_COMPILE=prefix-' but stored for > default make runs in this kernel build directory. You don't > need to set this unless you want the configured kernel build > directory to select the cross-compiler automatically. > > FWIW, it sounds more fiddly than using the now-quite-mature > CROSS_COMPILE config-item > > > > >> What toolchain are you using ? > >> can you replicate it using something here ? > >> > >> http://kernel.org/pub/tools/crosstool/ > > Since I got a build using this, you should give it a go. > If it works, file a bug report with ubuntu. arch/arm/boot/compressed/decompress.c has #define _LINUX_STRING_H_ which prevents from loading therefore: xz_private.h cannot include , or arch/arm/boot/compressed/decompress.c must define strstr I tried to remove the #include from xz_private.h, and replace it with more specific includes but cannot because lib/xz/xz_dec_lzma2.c uses min() which is defined in the header CC arch/arm/boot/compressed/decompress.o In file included from include/linux/kernel.h:23:0, from arch/arm/boot/compressed/../../../../lib/xz/xz_private.h:15, from arch/arm/boot/compressed/../../../../lib/decompress_unxz.c:145, from arch/arm/boot/compressed/decompress.c:50: include/linux/dynamic_debug.h: In function ‘ddebug_dyndbg_module_param_cb’: include/linux/dynamic_debug.h:111:2: error: implicit declaration of function ‘strstr’ [-Werror=implicit-function-declaration] > > > > > -- > > -Shawn Landden > > > > let me know how you get on, > ( learning from others' pain is one of the values of empathy! ) > > Jim -- -Shawn Landden -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/