[CT-NG] eglibc optim cflags

[Arnaud Vrac-2]

Hi all,

Is there any way to force eglibc to compile with -Os besides editing the
  build script ? I tested that this works so it should be possible to do
it from the configuration files.

Regards,

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Arnaud Vrac

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[Yann E. MORIN]

Arnaud,
All,

On Friday 09 October 2009 14:06:20 Arnaud Vrac wrote:
> Is there any way to force eglibc to compile with -Os besides editing the
> build script ? I tested that this works so it should be possible to do
> it from the configuration files.

Yes, please, provide a patch! :-)

Regards,
Ynn E. MORIN.

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[Arnaud Vrac-2]

Yann E. MORIN wrote:
> Arnaud,
> All,
>
> On Friday 09 October 2009 14:06:20 Arnaud Vrac wrote:
>> Is there any way to force eglibc to compile with -Os besides editing the
>> build script ? I tested that this works so it should be possible to do
>> it from the configuration files.
>
> Yes, please, provide a patch! :-)

I'm not sure where to put the default optimisation cflags. Should we
allow the TARGET_CFLAGS to override them ? Or do we only allow the libc
cflags to override them ?

I saw that there were some problems building eglibc with some
optimisations like -O so I'd be in favor of the second option.

Regards,

--
Arnaud Vrac

# HG changeset patch
# User Arnaud Vrac <avrac@...>
# Date 1255098531 -7200
# Node ID ef521b359e491d0be7104a7637e2886a076dc4eb
# Parent  503237de146a58b98c96a86c15cd4254ae85eb6d
glibc/eglibc: allow optimisation cflags to be overriden by configuration.

Signed-off-by: Arnaud Vrac <avrac@...>

diff -r 503237de146a -r ef521b359e49 scripts/build/libc/eglibc.sh
--- a/scripts/build/libc/eglibc.sh Fri Oct 09 16:22:09 2009 +0200
+++ b/scripts/build/libc/eglibc.sh Fri Oct 09 16:28:51 2009 +0200
@@ -301,7 +301,7 @@
     CT_DoLog DEBUG "Extra CC args passed    : '${extra_cc_args}'"
 
     BUILD_CC="${CT_BUILD}-gcc"                                      \
-    CFLAGS="${CT_TARGET_CFLAGS} ${CT_LIBC_GLIBC_EXTRA_CFLAGS} -O2"  \
+    CFLAGS="${CT_TARGET_CFLAGS} -O2 ${CT_LIBC_GLIBC_EXTRA_CFLAGS}"  \
     CC="${CT_TARGET}-gcc ${CT_LIBC_EXTRA_CC_ARGS} ${extra_cc_args}" \
     AR=${CT_TARGET}-ar                                              \
     RANLIB=${CT_TARGET}-ranlib                                      \
diff -r 503237de146a -r ef521b359e49 scripts/build/libc/glibc.sh
--- a/scripts/build/libc/glibc.sh Fri Oct 09 16:22:09 2009 +0200
+++ b/scripts/build/libc/glibc.sh Fri Oct 09 16:28:51 2009 +0200
@@ -317,7 +317,7 @@
     # Please see the comment for the configure step in do_libc().
 
     BUILD_CC="${CT_BUILD}-gcc"                                      \
-    CFLAGS="${CT_TARGET_CFLAGS} ${CT_LIBC_GLIBC_EXTRA_CFLAGS} -O2"  \
+    CFLAGS="${CT_TARGET_CFLAGS} -O2 ${CT_LIBC_GLIBC_EXTRA_CFLAGS}"  \
     CC="${cross_cc} ${CT_LIBC_EXTRA_CC_ARGS} ${extra_cc_args}"      \
     AR=${CT_TARGET}-ar                                              \
     RANLIB=${CT_TARGET}-ranlib                                      \
@@ -443,7 +443,7 @@
     # silly messages. GNU folks again, he?
 
     BUILD_CC="${CT_BUILD}-gcc"                                      \
-    CFLAGS="${CT_TARGET_CFLAGS} ${CT_LIBC_GLIBC_EXTRA_CFLAGS} -O2"  \
+    CFLAGS="${CT_TARGET_CFLAGS} -O2 ${CT_LIBC_GLIBC_EXTRA_CFLAGS}"  \
     CC="${CT_TARGET}-gcc ${CT_LIBC_EXTRA_CC_ARGS} ${extra_cc_args}" \
     AR=${CT_TARGET}-ar                                              \
     RANLIB=${CT_TARGET}-ranlib                                      \


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[Yann E. MORIN]

Arnaud,
All,

On Friday 09 October 2009 16:35:12 Arnaud Vrac wrote:
> I'm not sure where to put the default optimisation cflags. Should we
> allow the TARGET_CFLAGS to override them ? Or do we only allow the libc
> cflags to override them ?
> I saw that there were some problems building eglibc with some
> optimisations like -O so I'd be in favor of the second option.

Agreed.

Regards,
Yann E. MORIN.

--
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| [phone] | Software  Designer | \ / CAMPAIGN     |  ___               |
| [phone] `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
`------------------------------^-------^------------------^--------------------'



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