From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 30771 invoked by alias); 3 Jul 2010 12:31:32 -0000 Received: (qmail 30738 invoked by uid 48); 3 Jul 2010 12:31:19 -0000 Date: Sat, 03 Jul 2010 12:31:00 -0000 Subject: [Bug lto/44802] New: -flto -fuse-linker-plugin causes undefined references from libc in the link phase X-Bugzilla-Reason: CC Message-ID: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "moonshine at kapsi dot fi" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2010-07/txt/msg00303.txt.bz2 This works fine without -fuse-linker-plugin (with all object files extracted from archive). This reduced testcase has some undefined references of its own but still exposes the bug as shown below. Whole output of linking a complete program is attached because of its 30 kB size. Also a preprocessed source file is attached. gcc -std=gnu99 -fvisibility=hidden -O3 -fomit-frame-pointer -march=pentium4 -flto -fuse-linker-plugin -o xz main.i --SNAP-- /home/misty/gcc/lib/gcc/i686-pc-linux-gnu/4.5.1/../../../../i686-pc-linux-gnu/bin/ld: error: hidden symbol 'fgetc' is not defined locally /home/misty/gcc/lib/gcc/i686-pc-linux-gnu/4.5.1/../../../../i686-pc-linux-gnu/bin/ld: error: hidden symbol 'ferror' is not defined locally --SNAP-- main.i was produced with: gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I../.. -DLOCALEDIR=\"/home/misty/gcc/share/locale\" -I../../src/common -I../../src/liblzma/api -I../../lib -DLZMA_API_STATIC -pthread -fvisibility=hidden -Wall -Wextra -Wformat=2 -Winit-self -Wmissing-include-dirs -Wstrict-aliasing -Wfloat-equal -Wundef -Wshadow -Wpointer-arith -Wbad-function-cast -Wwrite-strings -Wlogical-op -Waggregate-return -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Wmissing-noreturn -Wredundant-decls -O3 -fomit-frame-pointer -march=pentium4 -flto -fuse-linker-plugin -MT xz-main.o -MD -MP -MF .deps/xz-main.Tpo -E main.c >main.i -- Summary: -flto -fuse-linker-plugin causes undefined references from libc in the link phase Product: gcc Version: 4.5.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: lto AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: moonshine at kapsi dot fi GCC host triplet: i686-pc-linux-gnu GCC target triplet: i686-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44802