What is the size increase in gcc runtime when u do this
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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