How to compile gcc with custom CFLAGS

Jan Sommer <soja-lists@xxxxxxxxxxxxxxxxxx> · Mon, 10 Aug 2015 22:05:41 +0200

Hi,

I compiled gcc with the following options:
../gcc-4.9.2/configure CFLAGS="-O0 -g" CXXFLAGS="-O0 -g" --enable-threads -with-gnu-as \
    --with-gnu-ld --with-newlib  --verbose \
    --with-system-zlib --disable-nls \
    --enable-version-specific-runtime-libs \
    --enable-languages=c,c++,ada \
    --target=arm-rtems4.11 \
    --prefix=/opt/rtems-arm/ \
    --enable-checking=yes

But although I set CFLAGS and CXXFLAGS still I can find a lot of places in the log where the optimization level is set to -O2.
This leads to the problem that when debugging of the Ada runtime a lot of variables are optimized out.
How can I enforce that the whole cross-compiler is built without any active optmizations?

Best regards,

   Jan