From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.90_1) id 1jZRKG-0006IU-JH for mharc-grub-devel@gnu.org; Thu, 14 May 2020 23:47:56 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56262) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jZRKE-0006E4-Np for grub-devel@gnu.org; Thu, 14 May 2020 23:47:54 -0400 Received: from mailout02.mx.bawue.net ([193.7.176.63]:48461) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jZRKD-0000d1-RW for grub-devel@gnu.org; Thu, 14 May 2020 23:47:54 -0400 Received: from infty.fritz.box (p5b17584c.dip0.t-ipconnect.de [91.23.88.76]) (Authenticated sender: pdim@bawue.de) by smtp.bawue.net (Postfix) with ESMTPSA id E9F752266E; Fri, 15 May 2020 05:47:46 +0200 (CEST) From: Hans Ulrich Niedermann To: grub-devel@gnu.org Cc: Hans Ulrich Niedermann Subject: [MULTIBOOT2 SPEC PATCH v4 19/27] multiboot2: Set -nostdlib before AC_PROG_CC for x-compile Date: Fri, 15 May 2020 05:43:42 +0200 Message-Id: <20200515034349.133092-20-hun@n-dimensional.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200515034349.133092-1-hun@n-dimensional.de> References: <20200515034349.133092-1-hun@n-dimensional.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Virus-Scanner: SAV Dynamic Interface 2.6.0, Engine: 3.77.1, SAV: 5.75 (A93B943C) on relay01.mx.bawue.net using milter-sssp 0.1.0 X-Virus-Scan: Found to be clean. Received-SPF: pass client-ip=193.7.176.63; envelope-from=hun@n-dimensional.de; helo=mailout02.mx.bawue.net X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/14 23:46:06 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: The development of GNU GRUB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 15 May 2020 03:47:55 -0000 Set -nostdlib in CFLAGS and LDFLAGS before AC_PROG_CC if we appear to be cross-compiling. This makes the example kernel build work on my x86_64 system with both * native compile to generate i386 example kernel ./configure --enable-example-kernel * cross-compile to generate mips example kernel ./configure --host=mips64-linux-gnu --enable-example-kernel It remains to be verified how this works on other systems, namely native mips systems, and non-x86 systems like arm. Signed-off-by: Hans Ulrich Niedermann diff --git a/configure.ac b/configure.ac index 830b1f57e..6b0718451 100644 --- a/configure.ac +++ b/configure.ac @@ -22,11 +22,18 @@ AM_INIT_AUTOMAKE([1.10.1]) # Programs # +AC_CANONICAL_BUILD +AC_CANONICAL_HOST + +AS_IF([test "x$host" != "x$build"], [dnl + CFLAGS="-nostdlib $CFLAGS" + LDFLAGS="-nostdlib $LDFLAGS" +]) + AC_PROG_CC AM_PROG_AS dnl Build the example Multiboot2 kernel (if possible on this host) -AC_CANONICAL_HOST kernel_boot_arch=unsupported kernel_ccasflags= kernel_cflags= @@ -57,8 +64,6 @@ AM_CONDITIONAL([BUILD_EXAMPLE_KERNEL], [test "x$enable_example_kernel" = xyes && test "x$kernel_boot_arch" != "xunsupported"]) -CFLAGS="-nostdlib $CFLAGS" - dnl Output. AC_CONFIG_FILES([Makefile doc/Makefile]) AC_OUTPUT -- 2.26.2