Problem with --enable-target-optspace

[Jeff Johnston]

Artur Lipowski wrote:
> Hi,
> 
> When I specify mentioned option then there is no possibility to use 
> CFLAGS environment variable (to supply some tailoring definitions like 
> e.g -DREENTRANT_SYSCALLS_PROVIDED).
> 
> I found that when --enable-target-optspace option is used then there is 
> generated Makefile with following directives (it is taken from the file 
> newlib/mt-ospace):
> # Build libraries optimizing for space, not speed.
>  CFLAGS_FOR_TARGET = -g -Os
>  CXXFLAGS_FOR_TARGET = -g -Os
> 
> For me it seems that there is missing  $(CFLAGS) entry - it should be 
> like that:
> CFLAGS_FOR_TARGET = -g -Os $(CFLAGS)
> 
> 
> Is it expected behaviour or I am doing something stupid?
>

Artur,

   You can add flags by specifying TARGET_CFLAGS=xxxx on your make 
invocation.  The makefiles in the lower levels have:

INCLUDES=$(NEWLIB_CFLAGS) $(CROSS_CFLAGS) $(TARGET_CFLAGS)

For things such as -DREENTRANT_SYSCALLS_PROVIDED, unless you are doing 
an experiment, this should be something you put in your platform's 
newlib_cflags setting in newlib/configure.host

-- Jeff J.

> 
> BTW> The same behaviour for the official version 1.15 and for the newest 
> CVS snapshot. Full command line command is:
> ../newlib/configure --target=arm-elf --prefix=/usr/local/arm 
> --enable-interwork --enable-multilib --enable-target-optspace 
> --disable-nls --with-gnu-as --with-gnu-ld 
> --disable-newlib-supplied-syscalls --enable-newlib-elix-level=1 
> --disable-newlib-io-float --disable-newlib-atexit-dynamic-alloc 
> --enable-newlib-reent-small
> 
> 
> Regards,