What is the size increase in gcc runtime when u do this
On Feb 1, 2016 2:01 PM, "Andre McCurdy" <armccurdy@gmail.com> wrote:

> Configuring gcc with --enable-target-optspace (which causes gcc to
> append "-g -Os" to the default CFLAGS_FOR_TARGET and so force libgcc
> etc target libraries to always be optimised for size) dates back to
> the very first commit in oe-core git in 2005 (for gcc 3.4.3).
>
> Configuring gcc with --enable-target-optspace is not done widely
> elsewhere (it's not used for Ubuntu or Fedora host gcc, the Linaro
> binary toolchain or in Buildroot since early 2015). Sometime around
> gcc 4.5.x it caused problems for powerpc and so was disabled for that
> architecture:
>
>   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43810
>
> This patch removes --enable-target-optspace completely (ie powerpc is
> no longer a special case) and allows optimisation of libgcc etc to be
> controlled directly by the flags present in TARGET_CFLAGS.
>
> Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
> ---
>  meta/recipes-devtools/gcc/gcc-configure-common.inc | 8 --------
>  meta/recipes-devtools/gcc/gcc-cross-initial.inc    | 1 -
>  2 files changed, 9 deletions(-)
>
> diff --git a/meta/recipes-devtools/gcc/gcc-configure-common.inc
> b/meta/recipes-devtools/gcc/gcc-configure-common.inc
> index 85e69db..f4f76bd 100644
> --- a/meta/recipes-devtools/gcc/gcc-configure-common.inc
> +++ b/meta/recipes-devtools/gcc/gcc-configure-common.inc
> @@ -14,13 +14,6 @@ JAVA_sh3 ?= ""
>  # gcc 3.x expects 'f77', 4.0 expects 'f95', 4.1 and 4.2 expect 'fortran'
>  FORTRAN ?= ",f77"
>  LANGUAGES ?= "c,c++${FORTRAN}${JAVA}"
> -# disable --enable-target-optspace for powerpc SPE
> -# at -Os libgcc.so.1 creates references into
> -# hidden symbols in libgcc.a which linker complains
> -# when linking shared libraries further in the build like (gnutls)
> -
> -SPECIAL_ARCH_LIST = "powerpc"
> -OPTSPACE = '${@bb.utils.contains("SPECIAL_ARCH_LIST", "${TARGET_ARCH}",
> "", "--enable-target-optspace",d)}'
>
>  EXTRA_OECONF_BASE ?= ""
>  EXTRA_OECONF_PATHS ?= ""
> @@ -42,7 +35,6 @@ EXTRA_OECONF = "\
>      --enable-libstdcxx-pch \
>      --program-prefix=${TARGET_PREFIX} \
>      --without-local-prefix \
> -    ${OPTSPACE} \
>      ${EXTRA_OECONF_BASE} \
>      ${EXTRA_OECONF_GCC_FLOAT} \
>      ${EXTRA_OECONF_PATHS} \
> diff --git a/meta/recipes-devtools/gcc/gcc-cross-initial.inc
> b/meta/recipes-devtools/gcc/gcc-cross-initial.inc
> index 910f2ef..048b530 100644
> --- a/meta/recipes-devtools/gcc/gcc-cross-initial.inc
> +++ b/meta/recipes-devtools/gcc/gcc-cross-initial.inc
> @@ -22,7 +22,6 @@ EXTRA_OECONF = "\
>      --disable-multilib \
>      --disable-__cxa_atexit \
>      --enable-languages=c \
> -    ${OPTSPACE} \
>      --program-prefix=${TARGET_PREFIX} \
>      --with-sysroot=/not/exist \
>      --with-build-sysroot=${GCCCROSS_BUILDSYSROOT} \
> --
> 1.9.1
>
> --
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