Hi,
Using native gcc compiler from x86_64 RHEL6.6 ... and trying to build 4.9.2
with a small footprint, only care about c and c++ languages... I tried to
follow the instructions in the installation regarding BOOT_CFLAGS,
CFLAGS_FOR_TARGET, STAGE1_TFLAGS ...
in my shell script I have:
../src/configure --prefix=/opt/gcc --enable-languages=c,c++ --enable-threads
--enable-libgomp --enable-lto --enable-threads=posix --enable-tls
--with-fpmath=sse --disable-bootstrap
and then
make BOOT_CFLAGS=-O2 CFLAGS_FOR_TARGET=-O2 STAGE1_TFLAGS=-O2
I tried both with and without --disable-bootstrap for configure and also with
make BOOT_CFLAGS=-O2 CFLAGS_FOR_TARGET=-O2 STAGE_CFLAGS=-O2
with little results. I kind of figured out that the -g flags substantially
increase the size of the resulting /opt/gcc
Eventually, I untar'd the gcc-4.9.2.tar.bz2, tried to find as many -g as I could, recompiled, and got a reduction from 400MBytes to about 130MBytes ... not bad, but I see in the log file that still the -g flag insidiously comes back from deep inside the libraries and other places... I believe I can
make it smaller, but I was wondering if there was any kind of "magic formula" to RELIABLY avoid the pesky -g flag to show up over and over again. I don't need to debug the compiler or any of the libraries at all, but is there any danger in getting rid of the -g flags? Also, can I get rid of the
/opt/gcc/share that seems to contain only docs?
Thanks for any help,
Ricardo
