Mans Rullgard <mans.rullg...@linaro.org> wrote:
> On 28 October 2012 18:08, "Frank Müller" <franky1...@gmx.net> wrote:
> > For easier maintenance, we are now switching to Linaro. The image is set
> up and I can compile, however I notice a peculiar fact: the binary
> distribution of Linaro's gcc
> (https://launchpad.net/linaro-toolchain-binaries/trunk/2012.10/+download/gcc-linaro-arm-linux-gnueabihf-4.7-2012.10-20121022_linux.tar.bz2)
> has a significantly larger compilation speed than a version of
> arm-linux-gnueabihf-gcc that is shipping with Ubuntu. In our particular case,
> using
> Ubuntu's version it takes less than 6 minutes to compile our software, but 10
> minutes when we use Linaro's version. The makefiles and source are exactly
> the same, only the compiler is different. I also tried an older version
> (4.6) of Linaro's gcc to match the Ubuntu one (tested the 12.04 shipped
> version), with no significant difference.
> >
> > Compiler flags for the system are -march=armv7-a -mtune=cortex-a8
> -mfpu=neon -mfloat-abi=hard
>
> Could you please show us the full output from compiling one of your
> source files adding -v to the flags with both compilers? This will
> reveal any differences in how they were configured.
Of course. I've also updated to the Ubuntu 12.10 g++-arm-linux-gnueabihf_4.7.2
version so it matches a bit better. For better readability I've added "====="
lines between the outputs.
Compiling one file with Ubuntu 12.10's arm-linux-gnueabihf-g++-4.7 with -v:
/usr/bin/arm-linux-gnueabihf-g++-4.7 -Wno-psabi -DNDEBUG -Isrc
-Iobj/Build/Release -include obj/Build/Release/default.h -O3 -Werror -Wall -v
-march=armv7-a -mtune=cortex-a8 -mfpu=neon -mfloat-abi=hard -isystem
src/messages -Wfatal-errors -Wpointer-arith -Wcast-qual -Wwrite-strings
-Wno-long-long -Wno-variadic-macros -Wno-multichar -Woverloaded-virtual
-Wctor-dtor-privacy -Wstrict-null-sentinel -Wsign-promo -ggdb1 --param
inline-unit-growth=200 --param large-function-growth=1000 -MMD -MP -fpch-deps
-std=c++0x -ftree-vectorize -funroll-loops -fomit-frame-pointer -o
"obj/Build/Release/main.o" -MF obj/Build/Release/main.d -c "src/main.cpp"
Using built-in specs.
COLLECT_GCC=/usr/bin/arm-linux-gnueabihf-g++-4.7
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.7.2-1ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
--enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.7 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix
--with-gxx-include-dir=/usr/arm-linux-gnueabihf/include/c++/4.7.2
--libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libitm
--enable-plugin --enable-objc-gc --enable-multilib --disable-sjlj-exceptions
--with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard --with-mode=thumb
--disable-werror --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=arm-linux-gnueabihf
--program-prefix=arm-linux-gnueabihf-
--includedir=/usr/arm-linux-gnueabihf/include
--with-headers=/usr/arm-linux-gnueabihf/include
--with-libs=/usr/arm-linux-gnueabihf/lib
Thread model: posix
gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-1ubuntu1)
COLLECT_GCC_OPTIONS='-Wno-psabi' '-D' 'NDEBUG' '-I' 'src' '-I'
'obj/Build/Release' '-include' 'obj/Build/Release/default.h' '-O3' '-Werror'
'-Wall' '-v' '-march=armv7-a' '-mtune=cortex-a8' '-mfpu=neon'
'-mfloat-abi=hard' '-isystem' 'src/messages' '-Wfatal-errors' '-Wpointer-arith'
'-Wcast-qual' '-Wwrite-strings' '-Wno-long-long' '-Wno-variadic-macros'
'-Wno-multichar' '-Woverloaded-virtual' '-Wctor-dtor-privacy'
'-Wstrict-null-sentinel' '-Wsign-promo' '-ggdb1' '--param'
'inline-unit-growth=200' '--param' 'large-function-growth=1000' '-MMD' '-MP'
'-fpch-deps' '-std=c++11' '-ftree-vectorize' '-funroll-loops'
'-fomit-frame-pointer' '-o' 'obj/Build/Release/main.o' '-MF'
'obj/Build/Release/main.d' '-c' '-shared-libgcc' '-mthumb' '-mtls-dialect=gnu'
/usr/lib/gcc/arm-linux-gnueabihf/4.7/cc1plus -quiet -v -I src -I
obj/Build/Release -imultiarch arm-linux-gnueabihf -MMD obj/Build/Release/main.d
-MF obj/Build/Release/main.d -MP -MQ obj/Build/Release/main.o -D_GNU_SOURCE -D
NDEBUG -include obj/Build/Release/default.h -isystem src/messages src/main.cpp
-quiet -dumpbase main.cpp -march=armv7-a -mtune=cortex-a8 -mfpu=neon
-mfloat-abi=hard -mthumb -mtls-dialect=gnu -auxbase-strip
obj/Build/Release/main.o -ggdb1 -O3 -Wno-psabi -Werror -Wall -Wfatal-errors
-Wpointer-arith -Wcast-qual -Wwrite-strings -Wno-long-long -Wno-variadic-macros
-Wno-multichar -Woverloaded-virtual -Wctor-dtor-privacy -Wstrict-null-sentinel
-Wsign-promo -std=c++11 -version -fpch-deps -ftree-vectorize -funroll-loops
-fomit-frame-pointer --param inline-unit-growth=200 --param
large-function-growth=1000 -fstack-protector -o /tmp/ccifId9I.s
GNU C++ (Ubuntu/Linaro 4.7.2-1ubuntu1) version 4.7.2 (arm-linux-gnueabihf)
compiled by GNU C version 4.7.2, GMP version 5.0.2, MPFR version
3.1.0-p3, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring duplicate directory
"/usr/lib/gcc/arm-linux-gnueabihf/4.7/../../../../arm-linux-gnueabihf/include"
ignoring nonexistent directory "/usr/include/arm-linux-gnueabihf"
#include "..." search starts here:
#include <...> search starts here:
src
obj/Build/Release
src/messages
/usr/arm-linux-gnueabihf/include/c++/4.7.2
/usr/arm-linux-gnueabihf/include/c++/4.7.2/arm-linux-gnueabihf
/usr/arm-linux-gnueabihf/include/c++/4.7.2/backward
/usr/lib/gcc/arm-linux-gnueabihf/4.7/include
/usr/lib/gcc/arm-linux-gnueabihf/4.7/include-fixed
/usr/arm-linux-gnueabihf/include
/usr/include
End of search list.
GNU C++ (Ubuntu/Linaro 4.7.2-1ubuntu1) version 4.7.2 (arm-linux-gnueabihf)
compiled by GNU C version 4.7.2, GMP version 5.0.2, MPFR version
3.1.0-p3, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 6a0e921a320b56c1431730761a6f5d56
COLLECT_GCC_OPTIONS='-Wno-psabi' '-D' 'NDEBUG' '-I' 'src' '-I'
'obj/Build/Release' '-include' 'obj/Build/Release/default.h' '-O3' '-Werror'
'-Wall' '-v' '-march=armv7-a' '-mtune=cortex-a8' '-mfpu=neon'
'-mfloat-abi=hard' '-isystem' 'src/messages' '-Wfatal-errors' '-Wpointer-arith'
'-Wcast-qual' '-Wwrite-strings' '-Wno-long-long' '-Wno-variadic-macros'
'-Wno-multichar' '-Woverloaded-virtual' '-Wctor-dtor-privacy'
'-Wstrict-null-sentinel' '-Wsign-promo' '-ggdb1' '--param'
'inline-unit-growth=200' '--param' 'large-function-growth=1000' '-MMD' '-MP'
'-fpch-deps' '-std=c++11' '-ftree-vectorize' '-funroll-loops'
'-fomit-frame-pointer' '-o' 'obj/Build/Release/main.o' '-MF'
'obj/Build/Release/main.d' '-c' '-shared-libgcc' '-mthumb' '-mtls-dialect=gnu'
/usr/lib/gcc/arm-linux-gnueabihf/4.7/../../../../arm-linux-gnueabihf/bin/as -v
-I src -I obj/Build/Release -march=armv7-a -mfloat-abi=hard -mfpu=neon -meabi=5
-o obj/Build/Release/main.o /tmp/ccifId9I.s
GNU assembler version 2.22 (arm-linux-gnueabihf) using BFD version (GNU
Binutils for Ubuntu) 2.22
COMPILER_PATH=/usr/lib/gcc/arm-linux-gnueabihf/4.7/:/usr/lib/gcc/arm-linux-gnueabihf/4.7/:/usr/lib/gcc/arm-linux-gnueabihf/:/usr/lib/gcc/arm-linux-gnueabihf/4.7/:/usr/lib/gcc/arm-linux-gnueabihf/:/usr/lib/gcc/arm-linux-gnueabihf/4.7/../../../../arm-linux-gnueabihf/bin/
LIBRARY_PATH=/usr/lib/gcc/arm-linux-gnueabihf/4.7/:/usr/lib/gcc/arm-linux-gnueabihf/4.7/../../../../arm-linux-gnueabihf/lib/../lib/:/usr/lib/gcc/arm-linux-gnueabihf/4.7/../../../../arm-linux-gnueabihf/lib/
COLLECT_GCC_OPTIONS='-Wno-psabi' '-D' 'NDEBUG' '-I' 'src' '-I'
'obj/Build/Release' '-include' 'obj/Build/Release/default.h' '-O3' '-Werror'
'-Wall' '-v' '-march=armv7-a' '-mtune=cortex-a8' '-mfpu=neon'
'-mfloat-abi=hard' '-isystem' 'src/messages' '-Wfatal-errors' '-Wpointer-arith'
'-Wcast-qual' '-Wwrite-strings' '-Wno-long-long' '-Wno-variadic-macros'
'-Wno-multichar' '-Woverloaded-virtual' '-Wctor-dtor-privacy'
'-Wstrict-null-sentinel' '-Wsign-promo' '-ggdb1' '--param'
'inline-unit-growth=200' '--param' 'large-function-growth=1000' '-MMD' '-MP'
'-fpch-deps' '-std=c++11' '-ftree-vectorize' '-funroll-loops'
'-fomit-frame-pointer' '-o' 'obj/Build/Release/main.o' '-MF'
'obj/Build/Release/main.d' '-c' '-shared-libgcc' '-mthumb' '-mtls-dialect=gnu'
===========================================================================
And with Linaro's arm-linux-gnueabihf-g++ in version 4.7.3:
~/compiler/bin/arm-linux-gnueabihf-g++ -Wno-psabi -DNDEBUG -Isrc
-Iobj/Build/Release -include obj/Build/Release/default.h -O3 -Werror -Wall -v
-march=armv7-a -mtune=cortex-a8 -mfpu=neon -mfloat-abi=hard -isystem
src/messages -Wfatal-errors -Wpointer-arith -Wcast-qual -Wwrite-strings
-Wno-long-long -Wno-variadic-macros -Wno-multichar -Woverloaded-virtual
-Wctor-dtor-privacy -Wstrict-null-sentinel -Wsign-promo -ggdb1 --param
inline-unit-growth=200 --param large-function-growth=1000 -MMD -MP -fpch-deps
-std=c++0x -ftree-vectorize -funroll-loops -fomit-frame-pointer -o
"obj/Build/Release/main.o" -MF obj/Build/Release/main.d -c "src/main.cpp"
Using built-in specs.
COLLECT_GCC=~/compiler/bin/arm-linux-gnueabihf-g++
Target: arm-linux-gnueabihf
Configured with:
/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/.build/src/gcc-linaro-4.7-2012.10/configure
--build=i686-build_pc-linux-gnu --host=i686-build_pc-linux-gnu
--target=arm-linux-gnueabihf
--prefix=/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/install
--with-sysroot=/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/install/arm-linux-gnueabihf/libc
--enable-languages=c,c++,fortran --enable-multilib --with-arch=armv7-a
--with-tune=cortex-a9 --with-fpu=vfpv3-d16 --with-float=hard
--with-pkgversion='crosstool-NG linaro-1.13.1-4.7-2012.10-20121022 - Linaro GCC
2012.10' --with-bugurl=https://bugs.launchpad.net/gcc-linaro
--enable-__cxa_atexit --enable-libmudflap --enable-libgomp --enable-libssp
--with-gmp=/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static
--with-mpfr=/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static
--with-mpc=/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static
--with-ppl=/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static
--with-cloog=/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static
--with-libelf=/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static
--with-host-libstdcxx='-L/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static/lib
-lpwl' --enable-threads=posix --disable-libstdcxx-pch --enable-linker-build-id
--enable-gold
--with-local-prefix=/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/install/arm-linux-gnueabihf/libc
--enable-c99 --enable-long-long --with-mode=thumb
Thread model: posix
gcc version 4.7.3 20121001 (prerelease) (crosstool-NG
linaro-1.13.1-4.7-2012.10-20121022 - Linaro GCC 2012.10)
COLLECT_GCC_OPTIONS='-Wno-psabi' '-D' 'NDEBUG' '-I' 'src' '-I'
'obj/Build/Release' '-include' 'obj/Build/Release/default.h' '-O3' '-Werror'
'-Wall' '-v' '-march=armv7-a' '-mtune=cortex-a8' '-mfpu=neon'
'-mfloat-abi=hard' '-isystem' 'src/messages' '-Wfatal-errors' '-Wpointer-arith'
'-Wcast-qual' '-Wwrite-strings' '-Wno-long-long' '-Wno-variadic-macros'
'-Wno-multichar' '-Woverloaded-virtual' '-Wctor-dtor-privacy'
'-Wstrict-null-sentinel' '-Wsign-promo' '-ggdb1' '--param'
'inline-unit-growth=200' '--param' 'large-function-growth=1000' '-MMD' '-MP'
'-fpch-deps' '-std=c++11' '-ftree-vectorize' '-funroll-loops'
'-fomit-frame-pointer' '-o' 'obj/Build/Release/main.o' '-MF'
'obj/Build/Release/main.d' '-c' '-shared-libgcc' '-mthumb' '-mtls-dialect=gnu'
~/compiler/bin/../libexec/gcc/arm-linux-gnueabihf/4.7.3/cc1plus -quiet -v -I
src -I obj/Build/Release -imultilib . -imultiarch arm-linux-gnueabihf -iprefix
~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/ -isysroot
~/compiler/bin/../arm-linux-gnueabihf/libc -MMD obj/Build/Release/main.d -MF
obj/Build/Release/main.d -MP -MQ obj/Build/Release/main.o -D_GNU_SOURCE -D
NDEBUG -include obj/Build/Release/default.h -isystem src/messages src/main.cpp
-quiet -dumpbase main.cpp -march=armv7-a -mtune=cortex-a8 -mfpu=neon
-mfloat-abi=hard -mthumb -mtls-dialect=gnu -auxbase-strip
obj/Build/Release/main.o -ggdb1 -O3 -Wno-psabi -Werror -Wall -Wfatal-errors
-Wpointer-arith -Wcast-qual -Wwrite-strings -Wno-long-long -Wno-variadic-macros
-Wno-multichar -Woverloaded-virtual -Wctor-dtor-privacy -Wstrict-null-sentinel
-Wsign-promo -std=c++11 -version -fpch-deps -ftree-vectorize -funroll-loops
-fomit-frame-pointer --param inline-unit-growth=200 --param
large-function-growth=1000 -o /tmp/ccUrHZXf.s
GNU C++ (crosstool-NG linaro-1.13.1-4.7-2012.10-20121022 - Linaro GCC 2012.10)
version 4.7.3 20121001 (prerelease) (arm-linux-gnueabihf)
compiled by GNU C version 4.1.3 20080704 (prerelease) (Ubuntu
4.1.2-27ubuntu1), GMP version 5.0.2, MPFR version 3.1.0, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/include/c++/4.7.3/arm-linux-gnueabihf/arm-linux-gnueabihf"
ignoring duplicate directory
"~/compiler/bin/../lib/gcc/../../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/include/c++/4.7.3"
ignoring duplicate directory
"~/compiler/bin/../lib/gcc/../../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/include/c++/4.7.3/arm-linux-gnueabihf/."
ignoring nonexistent directory
"~/compiler/bin/../lib/gcc/../../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/include/c++/4.7.3/arm-linux-gnueabihf/arm-linux-gnueabihf"
ignoring duplicate directory
"~/compiler/bin/../lib/gcc/../../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/include/c++/4.7.3/backward"
ignoring duplicate directory
"~/compiler/bin/../lib/gcc/../../lib/gcc/arm-linux-gnueabihf/4.7.3/include"
ignoring nonexistent directory
"~/compiler/bin/../arm-linux-gnueabihf/libc/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/install/arm-linux-gnueabihf/libc/include/."
ignoring nonexistent directory
"~/compiler/bin/../arm-linux-gnueabihf/libc/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/install/arm-linux-gnueabihf/libc/include/arm-linux-gnueabihf"
ignoring nonexistent directory
"~/compiler/bin/../arm-linux-gnueabihf/libc/cbuild/slaves/oort12/crosstool-ng/builds/arm-linux-gnueabihf-linux/install/arm-linux-gnueabihf/libc/include"
ignoring duplicate directory
"~/compiler/bin/../lib/gcc/../../lib/gcc/arm-linux-gnueabihf/4.7.3/include-fixed"
ignoring duplicate directory
"~/compiler/bin/../lib/gcc/../../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/include"
ignoring duplicate directory
"~/compiler/bin/../arm-linux-gnueabihf/libc/usr/include"
#include "..." search starts here:
#include <...> search starts here:
src
obj/Build/Release
src/messages
~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/include/c++/4.7.3
~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/include/c++/4.7.3/arm-linux-gnueabihf/.
~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/include/c++/4.7.3/backward
~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/include
~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/include-fixed
~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/include
~/compiler/bin/../arm-linux-gnueabihf/libc/usr/include/.
~/compiler/bin/../arm-linux-gnueabihf/libc/usr/include/arm-linux-gnueabihf
End of search list.
GNU C++ (crosstool-NG linaro-1.13.1-4.7-2012.10-20121022 - Linaro GCC 2012.10)
version 4.7.3 20121001 (prerelease) (arm-linux-gnueabihf)
compiled by GNU C version 4.1.3 20080704 (prerelease) (Ubuntu
4.1.2-27ubuntu1), GMP version 5.0.2, MPFR version 3.1.0, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 64b1e9c743d0e4b785aba96b8e8b411b
COLLECT_GCC_OPTIONS='-Wno-psabi' '-D' 'NDEBUG' '-I' 'src' '-I'
'obj/Build/Release' '-include' 'obj/Build/Release/default.h' '-O3' '-Werror'
'-Wall' '-v' '-march=armv7-a' '-mtune=cortex-a8' '-mfpu=neon'
'-mfloat-abi=hard' '-isystem' 'src/messages' '-Wfatal-errors' '-Wpointer-arith'
'-Wcast-qual' '-Wwrite-strings' '-Wno-long-long' '-Wno-variadic-macros'
'-Wno-multichar' '-Woverloaded-virtual' '-Wctor-dtor-privacy'
'-Wstrict-null-sentinel' '-Wsign-promo' '-ggdb1' '--param'
'inline-unit-growth=200' '--param' 'large-function-growth=1000' '-MMD' '-MP'
'-fpch-deps' '-std=c++11' '-ftree-vectorize' '-funroll-loops'
'-fomit-frame-pointer' '-o' 'obj/Build/Release/main.o' '-MF'
'obj/Build/Release/main.d' '-c' '-shared-libgcc' '-mthumb' '-mtls-dialect=gnu'
~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/bin/as
-v -I src -I obj/Build/Release -march=armv7-a -mfloat-abi=hard -mfpu=neon
-meabi=5 -o obj/Build/Release/main.o /tmp/ccUrHZXf.s
GNU assembler version 2.22 (arm-linux-gnueabihf) using BFD version
(crosstool-NG linaro-1.13.1-4.7-2012.10-20121022 - Linaro GCC 2012.10) 2.22
COMPILER_PATH=~/compiler/bin/../libexec/gcc/arm-linux-gnueabihf/4.7.3/:~/compiler/bin/../libexec/gcc/:~/compiler/bin/../libexec/gcc/arm-linux-gnueabihf/:~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/bin/
LIBRARY_PATH=~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/:~/compiler/bin/../lib/gcc/:~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/:~/compiler/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/lib/:~/compiler/bin/../arm-linux-gnueabihf/libc/lib/:~/compiler/bin/../arm-linux-gnueabihf/libc/lib/arm-linux-gnueabihf/:~/compiler/bin/../arm-linux-gnueabihf/libc/usr/lib/:~/compiler/bin/../arm-linux-gnueabihf/libc/usr/lib/arm-linux-gnueabihf/
COLLECT_GCC_OPTIONS='-Wno-psabi' '-D' 'NDEBUG' '-I' 'src' '-I'
'obj/Build/Release' '-include' 'obj/Build/Release/default.h' '-O3' '-Werror'
'-Wall' '-v' '-march=armv7-a' '-mtune=cortex-a8' '-mfpu=neon'
'-mfloat-abi=hard' '-isystem' 'src/messages' '-Wfatal-errors' '-Wpointer-arith'
'-Wcast-qual' '-Wwrite-strings' '-Wno-long-long' '-Wno-variadic-macros'
'-Wno-multichar' '-Woverloaded-virtual' '-Wctor-dtor-privacy'
'-Wstrict-null-sentinel' '-Wsign-promo' '-ggdb1' '--param'
'inline-unit-growth=200' '--param' 'large-function-growth=1000' '-MMD' '-MP'
'-fpch-deps' '-std=c++11' '-ftree-vectorize' '-funroll-loops'
'-fomit-frame-pointer' '-o' 'obj/Build/Release/main.o' '-MF'
'obj/Build/Release/main.d' '-c' '-shared-libgcc' '-mthumb' '-mtls-dialect=gnu'
===========================================================================
And the compilation timing and binary sizes for the whole project:
6m24s/4.6mb gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
7m2s/4.0mb gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-1ubuntu1)
10m51s/4.0mb gcc version 4.7.3 20121001 (prerelease) (crosstool-NG
linaro-1.13.1-4.7-2012.10-20121022 - Linaro GCC 2012.10)
11m3s/4.2mb same (4.7.3/Linaro) but with -mtune=cortex-a9
Frank
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