Date: Wed, 4 Sep 2013 23:07:35 +0800 From: 邓尧 <torshie@...il.com> To: musl@...ts.openwall.com Subject: Hidden symbol '__muldc3' referenced when compiled with gcc-4.8.1 Hi, I'm trying to build a musl based toolchain. My approach works well with gcc-4.7.3, however when upgrading gcc to 4.8.1, I run into such problem. Firstly comiple cross binutils: ../binutils-2.23.2/configure --prefix=... --target=... --with-sysroot=... make && make DESTDIR=... install Then compile cross gcc (compiler only) ../gcc-4.8.1/configure --prefix --target=... --with-sysroot=... --enable-languages=c make all-gcc && make DESTDIR=... install-gcc Compile musl-0.9.13: CC=$TARGET-gcc CFLAGS=-O2 ./configure --prefix=.. make && make DESTDIR=... install Finally compile fully working cross compiler, this is where I got problems: ../gcc-4.8.1/configure --prefix --target=... --with-sysroot=... --enable-languages=c make && make DESTDIR=... install In the final step, the build system will check whether the compiler (xgcc) could create executable. xgcc failed when linking, showed some error messages like the following: x86_64-unknown-linux-musl/bin/ld: a.out: hidden symbol `__muldc3' in musl/build/cross-4.8.1-gcc/./gcc/libgcc.a(_muldc3.o) is referenced by DSO. It seems libc.so is referencing some hidden symbol defined in libgcc.a. The linking problem could be resolved by statically linking libgcc when libc is statically linked, and dynamic link libgcc when libc is dynamic linked. However the dynamic loader (ld-musl) refuses to load dynamic linked executables, and shows the following error messages: Error relocating /lib64/ld-musl-x86_64.so.1: __muldc3: symbol not found Error relocating /lib64/ld-musl-x86_64.so.1: __mulsc3: symbol not found Error relocating /lib64/ld-musl-x86_64.so.1: __mulxc3: symbol not found Statically linked executables seem to be fine. Not sure whether it's a bug in gcc or musl, or it's simply a mistake in my building process. Any ideas ? Thanks Yao. Content of type "text/html" skipped
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