Bug#701082: gcc-4.7: gcc generates incorrect code with -O2 compiling libffi example
The libffi example works with -O0, -O1 and -O2 on armhf (Raspberry PI).
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabihf/4.6/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Debian
4.6.3-14+rpi1' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--enable-gnu-unique-object --enable-plugin --enable-objc-gc
--disable-sjlj-exceptions --with-arch=armv6 --with-fpu=vfp
--with-float=hard --enable-checking=release --build=arm-linux-gnueabihf
--host=arm-linux-gnueabihf --target=arm-linux-gnueabihf
Thread model: posix
gcc version 4.6.3 (Debian 4.6.3-14+rpi1)
ldd ffi-test:
/usr/lib/arm-linux-gnueabihf/libcofi_rpi.so (0xb6fa3000)
libffi.so.5 => /usr/lib/arm-linux-gnueabihf/libffi.so.5
(0xb6f7d000)
libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0xb6e4e000)
libgcc_s.so.1 => /lib/arm-linux-gnueabihf/libgcc_s.so.1
(0xb6e26000)
/lib/ld-linux-armhf.so.3 (0xb6faf000)
Reply to: