On 04.12.21 07:39, Michael Meissner via Fortran wrote:
I have loaded Advance Toolchain 15.0 on the system.  It is located in
/opt/at15.0.  AT 15 provides a GCC 11.2 compiler and GLIBC 2.34.

I tried bootstrapping (from a separate account I set up on the
machine to make sure I don't mess up anybody else's stuff)
with the options

../gcc/configure \
        --prefix=$HOME \
        --enable-languages=c,c++,fortran \
        --disable-plugin \
        --enable-checking \
        --enable-stage1-checking \
        --enable-gnu-indirect-function \
        --enable-maintainer-mode \
        --disable-libgomp \
        --enable-decimal-float \
        --enable-secureplt \
        --enable-threads=posix \
        --enable-__cxa_atexit \
        --with-cpu=power9 \
        --with-long-double-128 \
        --with-as=/opt/at15.0/bin/as \
        --with-ld=/opt/at15.0/bin/ld \
        --with-gnu-as=/opt/at15.0/bin/as \
        --with-gnu-ld=/opt/at15.0/bin/ld \
        --with-advance-toolchain=at15.0 \
        --with-system-zlib \
        --with-native-system-header-dir=/opt/at15.0/include \
        --without-ppl \
        --without-cloog \
        --without-isl

but it failed with

../../gcc/gcc/lto-compress.c:34:10: fatal error: zlib.h: No such file or directory

Any idea how to fix this?

Regards

        Thomas

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